CN112188065B - Imaging device and electronic apparatus - Google Patents

Abstract

Translated fromChinese

本申请公开了一种摄像装置，包括感光芯片(100)、第一透镜机构(200)和第二透镜机构(300)，第一透镜机构(200)设于感光芯片(100)与第二透镜机构(300)之间，第二透镜机构(300)包括第一折衍射镜片(310)和第二折衍射镜片(320)，在向感光芯片(100)投射光线的方向上，第一折衍射镜片(310)、第二折衍射镜片(320)、第一透镜机构(200)和感光芯片(100)依次设置，通过第二透镜机构(300)的环境光线可依次被第一折衍射镜片(310)和第二折衍射镜片(320)折衍射，且经过折衍射后的环境光线可经过第一透镜机构(200)投射至感光芯片(100)上。本申请还公开一种电子设备。该方案能解决背景技术中的电子设备存在厚度与摄像装置的尺寸之间的矛盾。

The present application discloses a camera device, comprising a photosensitive chip (100), a first lens mechanism (200) and a second lens mechanism (300). The first lens mechanism (200) is disposed between the photosensitive chip (100) and the second lens Between the mechanisms (300), the second lens mechanism (300) includes a first refracting diffraction lens (310) and a second refracting diffraction lens (320). In the direction of projecting light to the photosensitive chip (100), the first refracting diffraction lens The lens (310), the second refractive diffractive lens (320), the first lens mechanism (200) and the photosensitive chip (100) are arranged in sequence, and the ambient light passing through the second lens mechanism (300) can be sequentially refracted by the first refractive diffractive lens ( 310) and the second refractive diffractive lens (320) are refracted and diffracted, and the ambient light after being refracted and diffracted can be projected onto the photosensitive chip (100) through the first lens mechanism (200). The present application also discloses an electronic device. This solution can solve the contradiction between the thickness of the electronic equipment in the background art and the size of the camera device.

Description

Imaging device and electronic apparatus

Technical Field

The application belongs to the technical field of communication equipment, and particularly relates to a camera device and electronic equipment.

Background

Electronic equipment is generally provided with an image pickup device, and an image pickup function is realized. As the user's shooting needs increase, the performance of the camera device continues to be optimized. In order to improve the imaging quality, the size of the imaging device configured in the electronic device is larger and larger, and thus better optical performance can be realized.

As electronic devices are becoming thinner and lighter, the thickness of the electronic devices is difficult to increase. In this case, the size of the imaging device is becoming larger, which is contradictory to the demand for the electronic device to be thinner, so that it is difficult for the electronic device to configure an imaging device with better performance, and obviously, this may affect the performance of the electronic device.

Disclosure of Invention

An object of the embodiments of the present application is to provide an image pickup apparatus and an electronic device, which can solve the contradiction between the thickness of the electronic device and the size of the image pickup apparatus in the background art.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, the embodiment of the application discloses a camera device, including the photosensitive chip, first lens mechanism and second lens mechanism, first lens mechanism locates between photosensitive chip and the second lens mechanism, second lens mechanism includes the diffraction lens of first refraction and the diffraction lens of second refraction, in the direction of throwing light to photosensitive chip, first refraction diffraction lens, the diffraction lens of second refraction, first lens mechanism and photosensitive chip set gradually, ambient light through second lens mechanism can be in proper order by the diffraction lens of first refraction and the diffraction lens of second refraction and refraction, and ambient light after the refraction can be through first lens mechanism throw to the photosensitive chip.

In a second aspect, an embodiment of the present application discloses an electronic device including the above-described image capturing apparatus.

This application adopts above-mentioned technical scheme can reach following beneficial effect:

the camera device disclosed by the embodiment of the application, through with some lenses change for the diffraction lens of first refraction and the diffraction lens of second refraction, because the chromatic aberration can be eliminated to the diffraction lens of first refraction and the diffraction lens of second refraction, and then can make camera device need not additionally to dispose the lens that is used for eliminating the chromatic aberration, thereby can reduce the lens quantity, this kind of structure can make camera device can eliminate the chromatic aberration and guarantee imaging quality, can reduce camera device's lens quantity again, and then can make the size of camera module diminish, finally can solve the contradiction between camera device's size of a dimension and electronic equipment's thickness.

Meanwhile, the first refraction diffraction lens and the second refraction diffraction lens are matched with each other, so that multi-level diffraction is realized, and further diffraction efficiency can be further improved.

Drawings

Fig. 1 is a schematic structural diagram of an image pickup apparatus disclosed in an embodiment of the present application;

FIG. 2 is an enlarged schematic structural view of an area surrounded by a dotted line box in FIG. 1;

fig. 3 is a schematic structural diagram of another image capturing apparatus disclosed in the embodiment of the present application;

fig. 4 is an enlarged structural diagram of an area surrounded by a dotted line box in fig. 3.

Description of reference numerals:

100-photosensitive chip,

200-first lens mechanism, 210-optic holder, 220-optic,

300-second lens mechanism,

300 a-first lens, 300 b-second lens,

310-first refractive diffractive optic, 311-first base layer, 311 a-first surface, 311 b-second surface, 311 c-third surface, 312-first diffractive protrusions,

320 second refraction lens, 321-second base layer, 321 a-sixth surface, 321 b-fifth surface, 321 c-fourth surface, 322 second diffraction projection,

330-imprinting the adhesive layer,

400-optical filter.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

As shown in fig. 1 to 4, an embodiment of the present application discloses an image pickup apparatus, which is applicable to an electronic device. The disclosed image pickup apparatus includes aphotosensitive chip 100, afirst lens mechanism 200, and asecond lens mechanism 300.

Thephotosensitive chip 100 is a component for imaging in the image pickup apparatus, and in a specific shooting process, ambient light reflected by a shot object can be finally projected onto thephotosensitive chip 100, and a photosensitive surface of thephotosensitive chip 100 can convert an optical signal into an electrical signal corresponding to the optical signal, so that an imaging purpose is achieved. In a general case, thephotosensitive chip 100 may be a CCD (Charge Coupled Device) Device, or may also be a CMOS (Complementary Metal Oxide Semiconductor) Device, and the specific kind of thephotosensitive chip 100 is not limited in the embodiment of the present application.

Thefirst lens mechanism 200 and thesecond lens mechanism 300 are both light distribution devices, and in a general case, the image pickup apparatus may include a lens holder, and thefirst lens mechanism 200 and thesecond lens mechanism 300 are both mounted in a lens barrel of a lens of the image pickup apparatus and then mounted in the lens holder through the lens, thereby realizing the mounting of thefirst lens mechanism 200 and thesecond lens mechanism 300.

First lens mechanism 200 is located betweensensitization chip 100 andsecond lens mechanism 300, and in the direction that is close tosensitization chip 100,second lens mechanism 300 sets gradually withfirst lens mechanism 200, andsecond lens mechanism 300 andfirst lens mechanism 200 all can carry out optical control to ambient light, reach the purpose of grading.

In the embodiment of the present application, thefirst lens mechanism 200 may include acommon lens 220, such as a convex lens, a concave lens, etc., and the embodiment of the present application does not limit the specific type and number of thelens 220 included in thefirst lens mechanism 200. In an alternative, thefirst lens mechanism 200 may include alens holder 210 and at least twolenses 220, and the at least twolenses 220 are mounted on thelens holder 210, so that thelens holder 210 can be conveniently preassembled and integrally mounted, and finally, the assembly efficiency can be improved.

Thesecond lens mechanism 300 may include a first foldeddiffraction lens 310 and a second foldeddiffraction lens 320, the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320 may be sequentially disposed in a direction toward thephotosensitive chip 100, and specifically, the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320 may be disposed at the same height, so that an optical axis of the first foldeddiffraction lens 310 and an optical axis of the second foldeddiffraction lens 320 are collinear. Of course, the first foldeddiffraction mirror 310 and the second foldeddiffraction mirror 320 may be exchanged with each other.

The firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320 can refract and diffract the ambient light passing through, and according to the principle of refraction and diffraction, chromatic aberration is generated in the process of refraction and diffraction of the ambient light. Because the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320 can refract the ambient light and diffract the ambient light, the chromatic aberration generated by the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320 by diffracting the ambient light and the chromatic aberration generated by refracting the ambient light can be mutually offset, so that the chromatic aberration generated by the ambient light in the shooting process can be relieved or even eliminated. Further, thesecond lens unit 300 can have an optimal diffractive effect by setting the assembling relationship of the firstrefractive diffraction mirror 310 and the secondrefractive diffraction mirror 320.

In the direction of projecting light to thephotosensitive chip 100, the firstfolding diffraction lens 310, the secondfolding diffraction lens 320, thefirst lens mechanism 200 and thephotosensitive chip 100 are sequentially arranged, specifically, the firstfolding diffraction lens 310, the secondfolding diffraction lens 320, thefirst lens mechanism 200 and thephotosensitive chip 100 can be sequentially arranged at intervals, so that the problem of mutual interference between internal devices of the image pickup device can be effectively avoided.

In a specific working process, the ambient light passing through thesecond lens mechanism 300 can be refracted and diffracted by the first refraction anddiffraction lens 310 and the second refraction anddiffraction lens 320 in sequence, and the refracted and diffracted ambient light can be projected onto thephotosensitive chip 100 through thefirst lens mechanism 200, so as to finally realize photosensitive imaging of thephotosensitive chip 100.

In the embodiment of the present application, the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 both have diffraction structures, and the diffraction structures can perform a function of diffracting ambient light. Specifically, the firstfold diffraction mirror 310 may have a first diffraction structure, and the secondfold diffraction mirror 320 may have a second diffraction structure.

The first diffractive structure may be located on one side of the first folded diffractive optic 310 and the second diffractive structure may be located on one side of the second folded diffractive optic 320. Specifically, the first diffractive structure may be located on the image side of the first foldeddiffractive lens 310, or may be located on the object side of the first foldeddiffractive lens 310. Similarly, the second diffractive structure may be located on the image side of the second foldeddiffractive lens 320, or on the object side of the second foldeddiffractive lens 320.

Of course, the first diffractive structure may be located inside the first foldeddiffractive lens 310, and the second diffractive structure may be located inside the second foldeddiffractive lens 320, and the embodiment of the present application does not limit the specific location of the first diffractive structure on the first foldeddiffractive lens 310, and similarly, the embodiment of the present application also does not limit the specific location of the second diffractive structure on the second foldeddiffractive lens 320.

In an optional scheme, the first diffraction structure and the second diffraction structure are respectively located on two opposite sides of the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320, and the structures are favorable for protecting the first diffraction structure and the second diffraction structure and avoiding the conditions of abrasion, collision and the like.

The imaging device disclosed in the embodiment of the application improves the structure of the imaging device in the background technology, such that thesecond lens mechanism 300 includes a first folded diffractive optic 310 and a second folded diffractive optic 320, when the ambient light passes through the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 in sequence, the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320 can make the chromatic aberration generated by diffraction and the chromatic aberration generated by refraction offset each other, in the direction of projecting light to thephotosensitive chip 100, the firstfolding diffraction lens 310, the secondfolding diffraction lens 320, thefirst lens mechanism 200 and thephotosensitive chip 100 are sequentially arranged, ambient light passing through thesecond lens mechanism 300 can be refracted and diffracted by the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 in sequence, and the refracted and diffracted ambient light can be projected onto thephotosensitive chip 100 through thefirst lens mechanism 200, so as to realize imaging of thephotosensitive chip 100.

The camera device disclosed in the embodiment of the application, through replacing some lenses with the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320, because the chromatic aberration can be better eliminated by the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320, and then the camera device can be enabled not to be additionally provided with lenses for eliminating the chromatic aberration, thereby the number of the lenses can be reduced, the structure can enable the camera device to eliminate the chromatic aberration and ensure the imaging quality, and the number of the lenses of the camera device can be reduced, so that the size of the camera module can be reduced, and finally the contradiction between the size of the camera device and the thickness of the electronic equipment can be solved.

Meanwhile, the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320 are matched with each other, so that multi-layer diffraction is realized, and further diffraction efficiency can be further improved.

The imaging device disclosed by the embodiment of the application can realize multilayer diffraction, further can obtain higher 1-order diffraction efficiency (at least 99%), and can reduce the problems of stray light and glare generated by other-order diffracted light while improving the light inlet quantity.

In the embodiment of the present application, thesecond lens mechanism 300 may further include an embossedadhesive layer 330, the embossedadhesive layer 330 is disposed between the first folded diffractiveoptical element 310 and the second folded diffractiveoptical element 320, and the first folded diffractiveoptical element 310 and the second folded diffractiveoptical element 320 may be connected by the embossedadhesive layer 330. In this case, the embossedadhesive layer 330 can integrate the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320, thereby facilitating the integrated installation in the image capturing device.

In an alternative scheme, the firstfolding diffraction lens 310 is coated with stamping glueThe seconddiffractive optic 320 is aligned with the direction of the imprinting paste, and is imprinted toward the imprinting paste, and then the imprinting paste is formed into theimprinting paste layer 330 by curing. For example, the imprint glue is cured by means of ultraviolet exposure, so that the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320 are glued together. The embossedadhesive layer 330 can bond the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320, and of course, the distance between the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320 can be determined by adjusting the thickness of the embossedadhesive layer 330. In the embodiment of the present application, the imprintingadhesive layer 330 may be an ultraviolet curing imprinting adhesive or a thermosetting imprinting adhesive. Specifically, the thickness h of the imprintingadhesive layer 330_iMay be greater than 0.5 μm and less than 500 μm.

In specific working process, the imprintingadhesive layer 330 can be a refractive index compensation layer, and then the difference of the refractive index of the diffraction surface of the firstrefraction diffraction lens 310 can be reduced, and then the manufacturing process difficulty of the firstrefraction diffraction lens 310 can be reduced, the refraction and diffraction efficiency can be improved, meanwhile, the light optimized and adjusted by the firstrefraction diffraction lens 310 and the imprintingadhesive layer 330 enters the secondrefraction diffraction lens 320 at a proper angle, the secondrefraction diffraction lens 320 refracts and diffracts the light again, therefore, the chromatic aberration generated by the diffraction of the secondrefraction diffraction lens 320 on the light and the chromatic aberration generated by the refraction on the light can be mutually offset, thereby the chromatic aberration generated by the light in the projection process can be eliminated, and further the projection quality can be improved.

In an optional scheme, the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 may both be glass structural members, in another optional scheme, the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 may be made of optical plastic by injection molding, in this case, the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 are both optical plastic structural members, and the optical plastic is light, so as to be beneficial to reducing the mass of the firstfolding diffraction lens 310 and the mass of the secondfolding diffraction lens 320, and further be beneficial to reducing the mass of a lens of the camera module. Under the condition that the camera device comprises the zoom motor, the zoom motor can drive the lens to move, and the quality of the lens can be reduced, so that the camera module does not need to be provided with a motor with higher power, and the cost of the camera device is reduced, and the energy consumption can be reduced.

In addition, the optical plastic structural part is formed by injection molding, so that the optical plastic structural part has the advantages of simplicity in processing, suitability for mass production, low processing cost and the like. In the embodiments of the present application, the optical plastic may be various, such as PC (Polycarbonate), COC (Cyclic Olefins copolymer), COP (Cyclic Olefins Polymer), etc., and the embodiments of the present application are not limited to specific types of optical plastics.

In the embodiment of the present application, the refractive indexes of the first foldingdiffraction mirror plate 310, the second foldingdiffraction mirror plate 320 and theimprinting glue layer 330 can be adjusted to achieve the optimal diffraction effect of thesecond lens mechanism 300. Specifically, the refractive index can be determined by selecting the thicknesses and materials of the firstrefractive diffraction mirror 310, the secondrefractive diffraction mirror 320 and theimprinting glue layer 330, and in an alternative scheme, the refractive index n of the firstrefractive diffraction mirror 310_p1Greater than 1.3RIU (Refractive index unit) and less than 1.8RIU, or the Refractive index n of the second foldeddiffractive optic 320_p2Greater than 1.3RIU and less than 1.8RIU, or the refractive index n of the imprint resistlayer 330_iGreater than 1.3RIU and less than 1.9RIU, the firstrefraction diffraction lens 310, the secondrefraction diffraction lens 320 and theimpression glue layer 330 of this kind of refracting power scope can make the environment light of projection obtain better refraction effect when passing through to can make the colour difference that the refraction produced offset the colour difference that the diffraction produced better, can obtain better imaging quality finally.

In the embodiment of the present application, the firstfolding diffractive optic 310 may include a plurality of concentrically arranged firstdiffractive protrusions 312, and the plurality of concentrically arranged firstdiffractive protrusions 312 form a first diffractive structure of the firstfolding diffractive optic 310. When passing through the firstrefraction diffraction lens 310, the ambient light is refracted by the first refraction surface (which can be regarded as the surface of the firstrefraction diffraction lens 310 deviating from the first diffraction protrusion 312), and then is diffracted by thefirst diffraction protrusion 312, so as to achieve refractionAnd the chromatic aberration generated by diffraction are mutually counteracted. The plurality offirst diffraction protrusions 312 are concentrically arranged, so that the first diffraction structure formed by the firstrefractive diffraction lens 310 is a sawtooth-shaped structure, and in an alternative scheme, in a radial direction from the center to the far center of the firstrefractive diffraction lens 310, the distance between the top ends of two adjacent first diffraction protrusions 312 (namely, the period Λ of the first diffraction structure)₁) And the period of the first diffraction structure is gradually decreased from the center of the first diffraction structure to the edge of the first diffraction structure. The firstrefractive diffraction lens 310 is a circular lens, and the plurality offirst diffraction protrusions 312 are annular protrusions concentrically arranged. This arrangement enables a better diffraction effect near the edge of the first foldeddiffractive optic 310.

The secondfold diffraction optic 320 may include a plurality of concentrically disposedsecond diffraction protrusions 322, the plurality of concentrically disposedsecond diffraction protrusions 322 forming the second diffraction structure of the secondfold diffraction optic 320. When passing through the secondrefraction diffraction lens 320, the ambient light is firstly diffracted by thesecond diffraction protrusion 322, and then is refracted by the second refraction surface (which may be regarded as the surface of the secondrefraction diffraction lens 320 deviating from the second diffraction protrusion 322), so as to achieve the purpose of mutually offsetting chromatic aberration generated by refraction and diffraction.

Similarly, the plurality ofsecond diffraction protrusions 322 are concentrically arranged, so that the second diffraction structure of thesecond refraction mirror 320 is a saw-toothed structure, and in an alternative scheme, in a radial direction from the center to the center of thesecond refraction mirror 320, a distance between top ends of two adjacent second diffraction protrusions 322 (i.e. a period Λ of the second diffraction structure)₂) And the period of the second diffraction structure is gradually decreased from the center of the second diffraction structure to the edge of the second diffraction structure. The second foldeddiffraction lens 320 is a circular lens, and the plurality ofsecond diffraction protrusions 322 are annular protrusions concentrically arranged.

In a further aspect, the distance between the tips of two adjacent first diffractive protrusions 312 (i.e., the period Λ of the first diffractive structure)₁) Can be greater than 0.5 μm and less than 300 μm, it being noted that the firstdiffractive projection 312 has a root andthe top of the firstdiffractive protrusion 312 is the top of the firstdiffractive protrusion 312, and the root of the firstdiffractive protrusion 312 is the bottom of the firstdiffractive protrusion 312. Through detection, the distance between the top ends of the two adjacent first diffraction bulges 312 can better ensure the diffraction effect, and is helpful for enabling the chromatic aberration generated by diffraction to offset the chromatic aberration generated by refraction.

Similarly, the distance between the tips of two adjacent second diffractive protrusions 322 (i.e., the period Λ of the second diffractive structure)₂) It may be greater than 0.5 μm and less than 300 μm, and it should be noted that seconddiffractive protrusion 322 has a root and a top, where the top of seconddiffractive protrusion 322 is the top of seconddiffractive protrusion 322, and the root of seconddiffractive protrusion 322 is the bottom of seconddiffractive protrusion 322. Through detection, the distance between the top ends of the two adjacent second diffraction bulges 322 can better ensure the diffraction effect, and is helpful for enabling the chromatic aberration generated by diffraction to offset the chromatic aberration generated by refraction. In a specific embodiment, the period Λ of the first diffractive structure₁May be related to the period Λ of the second diffractive structure₂Are equal.

In a further aspect, the height h of the firstdiffractive protrusions 312_d1May be larger than 0.1 μm and smaller than 30 μm, and the height of thefirst diffraction projections 312 can be detected to ensure a good diffraction effect. Note that the height of thefirst diffraction projections 312 refers to the dimension in the direction from the bottom end to the top end of thefirst diffraction projections 312. Specifically, in a radial direction from the center of the first foldeddiffraction mirror plate 310 to the center, the heights of thefirst diffraction protrusions 312 are decreased or increased, and of course, the heights of all thefirst diffraction protrusions 312 of the first foldeddiffraction mirror plate 310 may be equal.

Similarly, the height h of the seconddiffractive protrusions 322_d2May be larger than 0.1 μm and smaller than 30 μm, and the height of thesecond diffraction projections 322 can be detected to ensure a good diffraction effect. Note that the height of thesecond diffraction projections 322 refers to the dimension in the direction from the bottom end to the top end of thesecond diffraction projections 322. In particular, in a radial direction from the center of the second diffractive structure to the center, the second diffractive structureThe heights of thediffraction protrusions 322 are gradually decreased or increased, and of course, the heights of all thesecond diffraction protrusions 322 of the secondfold diffraction lens 320 may be equal.

In order to make the refractive and diffractive effect of thesecond lens mechanism 300 better and make the internal layout of thesecond lens mechanism 300 more compact, in an alternative scheme, the firstdiffractive protrusion 312 and the seconddiffractive protrusion 322 may be respectively disposed on the surfaces of the first refractivediffractive optic 310 and the second refractivediffractive optic 320.

In a further technical solution, the firstfolding diffractive lens 310 may further include afirst base layer 311, the firstdiffractive protrusion 312 is disposed on thefirst base layer 311, a surface of thefirst base layer 311 departing from the firstdiffractive protrusion 312 is afirst surface 311a, thefirst surface 311a may be a plane, a concave surface or a convex surface, a specific surface type of thefirst surface 311a may be a spherical surface or an aspheric surface, and the specific surface type of thefirst surface 311a is not limited in this embodiment of the application. In the case that the surface of thefirst base layer 311 facing away from the first diffractive protrusions 312 (i.e., thefirst surface 311a) is spherical or aspherical, the refraction and diffraction effects of the firstrefractive diffraction lens 310 can be more optimized.

Thefirst base layer 311 can provide a setting basis for thefirst diffraction projections 312, so that thefirst diffraction projections 312 have high strength and are not easily damaged. At the same time, thefirst base layer 311 also facilitates the molding of thefirst diffraction protrusions 312. Of course, thefirst base layer 311 is also a light-transmitting material, and needs to be able to ensure the passage of ambient light. Specifically, the material of thefirst base layer 311 is the same as that of the firstdiffractive protrusion 312, and may be made of glass, optical plastic, or other materials.

Similarly, the second diffractiveoptical element 320 may further include asecond base layer 321, the seconddiffractive protrusion 322 is disposed on thesecond base layer 321, a surface of thesecond base layer 321 facing away from the seconddiffractive protrusion 322 is asixth surface 321a, thesixth surface 321a may be a plane, a concave surface, or a convex surface, a surface type of thesixth surface 321 may be a spherical surface or an aspheric surface, and the specific surface type of thesixth surface 321a is not limited in this embodiment of the application. In the case where the surface (sixth surface 321a) of thesecond base layer 321 facing away from the seconddiffractive protrusions 322 is a spherical surface or an aspherical surface, the refractive effect of the second foldeddiffractive lens 320 can be more optimized.

Thesecond base layer 321 can provide a setting base for thesecond diffraction protrusions 322, so that thesecond diffraction protrusions 322 have high strength and are not easily damaged. At the same time, thesecond base layer 321 also facilitates molding of thesecond diffraction protrusions 322. Of course, thesecond base layer 321 is also a light-transmitting material, and needs to be able to ensure the passage of ambient light. Specifically, the material of thesecond base layer 321 is the same as that of the seconddiffractive protrusion 322, and may be made of glass, optical plastic, or other materials.

In the embodiment of the present application, the thickness h of thefirst base layer 311_p1May be greater than 0.05mm and less than 0.6mm, or, the thickness h of thesecond base layer 321_p2The refractive and diffractive effects of the first refractive and diffractiveoptical element 310 and the second refractive and diffractiveoptical element 320 can be changed by properly adjusting the thicknesses of thefirst base layer 311 and thesecond base layer 321, which can be greater than 0.05mm and less than 0.6mm, and the refractive and diffractive effects of thesecond lens mechanism 300 can be better by detecting the thicknesses of thefirst base layer 311 and thesecond base layer 321 within the above-mentioned thickness range.

In a specific embodiment, in the case that thefirst surface 311a or thesixth surface 321a is an aspheric surface, the aspheric surface equation of thefirst surface 311a and thesixth surface 321a is shown in the following formula (1):

in the formula (1), c is the curvature of thefirst surface 311a or thesixth surface 321a, the curvatures of thefirst surface 311a and thesixth surface 321a may be the same or different, K is a conic constant, a_2nIs a phase coefficient of 2n, r is the distance of the ambient light from the optical axis, which is the optical axis of the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320, x₁The distance between each point of thefirst surface 311a or thesixth surface 321a and the corresponding base surface, which is a surface passing through the center of thefirst surface 311a or thesixth surface 321a and perpendicular to the optical axis, is the distance along the optical axis.

In another specific embodiment, the surface of thefirst base layer 311 for supporting the firstdiffractive protrusions 312 is asecond surface 311b, thesecond surface 311b can be regarded as a reference surface of the first diffractive structure, and thesecond surface 311b can be a plane, a spherical surface or an aspheric surface, and likewise, the specific surface type of thesecond surface 311b is not limited by the embodiments of the present application. The surface on which the tips of all the firstdiffractive protrusions 312 are located is thethird surface 311 c.

In the case where thesecond surface 311b is an aspheric surface, the surface equation of the first diffractive structure is shown in the following formula (2):

in the formula (2), x_d1Is the distance of each point of the first diffractive structure from the reference plane of the first diffractive structure, the distance being the distance in the optical axis direction, c is the curvature of thesecond surface 311b, K is the conic constant, a_2nIs aspheric coefficient of 2n, r is distance of ambient light from the optical axis, n is number of diffraction zones included in the first diffraction structure counted from the center to the edge of the first foldeddiffraction lens 310, i.e. number offirst diffraction protrusions 312, in case that thefirst diffraction protrusions 312 are annular protrusions, one annular protrusion is one diffraction zone, h is_d10.1 μm < h for the height of the first diffractive structure, i.e., the height of the firstdiffractive protrusions 312, i.e., the distance between thethird surface 311c and thesecond surface 311b, calculated by scalar diffraction theory_d1＜30μm，φ₁The optical path length resulting from diffraction for the first diffractive structure can be calculated by the following formula (3).

φ₁＝(C₂r²+C₄r⁴+C₆r⁶+…+C_2nr²ⁿ)×2π/λ (3)

In the formula (3), C_2nIs the phase coefficient to the power of 2n, λ is the wavelength of the ambient light, and r is the distance of the ambient light from the optical axis.

In yet another embodiment, the surface of thesecond base layer 321 for supporting the seconddiffractive protrusion 322 is afifth surface 321b, thefifth surface 321b can be regarded as a reference surface of the second diffractive structure, and thefifth surface 321b can be a plane, a spherical surface or an aspheric surface, and likewise, the specific surface type of thefifth surface 321b is not limited in the embodiments of the present application. The surface on which the tips of all thesecond diffraction protrusions 322 are located is thefourth surface 321 c.

In the case where thefifth surface 321b is an aspheric surface, the surface equation of the second diffractive structure is shown in the following formula (4):

in the formula (4), x_d2Is a distance of each point of the second diffraction structure from a reference plane of the second diffraction structure, the distance being a distance in the optical axis direction, c is a curvature of thefifth surface 321b, K is a conic constant, a_2nIs aspheric coefficient of 2n, r is distance of ambient light from the optical axis, n is number of diffraction zone included in the second diffraction structure counted from the center to the edge of thesecond diffraction lens 320, i.e. number ofsecond diffraction protrusions 322, in case that thesecond diffraction protrusions 322 are annular protrusions, one annular protrusion is one diffraction zone, h is_d20.1 μm < h for the height of the second diffractive structure, i.e., the height of the seconddiffractive protrusions 322, i.e., the distance between thefourth surface 321c and thefifth surface 321b, calculated by scalar diffraction theory_d2＜30μm，φ₂The optical path length for diffraction by the second diffraction structure can be calculated by the following equation (5).

φ₂＝(C₂r²+C₄r⁴+C₆r⁶+…+C_2nr²ⁿ)×2π/λ (5)

In the formula (5), C_2nIs the phase coefficient to the power of 2n, λ is the wavelength of the ambient light, and r is the distance of the ambient light from the optical axis.

In the embodiment of the present application, the 1 st order diffraction of the diffraction structure is the imaging diffraction order, and the other orders diffraction light can be glare, and further has an adverse effect on the imaging, and the first diffraction junction is used for reducing the glare phenomenon so that the 1 st order diffraction can reach the maximum efficiencyHeight h of the structure_d1And height h of the second diffractive structure_d2According to the refractive index difference deltan between the firstrefraction diffraction lens 310 and the secondrefraction diffraction lens 320 and the embossedglue layer 330₁＝|n_p1-n_iL and Δ n₂＝|n_i-n_p2And is determined by scalar diffraction theory calculation, where n_p1And n_p2The refractive indexes of the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320, n_iIs the refractive index of theimprint glue layer 330.

In an alternative, the firstfolding diffraction lens 310 and the secondfolding diffraction lens 320 may be an integral injection molding structure, that is, during the manufacturing process, thefirst base layer 311 and thefirst diffraction protrusion 312 may be formed together, and similarly, thesecond base layer 321 and thesecond diffraction protrusion 322 may be formed together, and this manufacturing process has the advantages of simple processing, high production efficiency, and the like.

In the embodiment of the present application, thesecond lens mechanism 300 may further include afirst lens 300a and asecond lens 300b, thefirst lens 300a may include a first refraction anddiffraction lens 310 and a second refraction anddiffraction lens 320, and thesecond lens 300b is located on a side of thefirst lens 300a facing away from thefirst lens mechanism 200, or thesecond lens 300b is located between thefirst lens 300a and thefirst lens mechanism 200, wherein thesecond lens 300b may serve as an auxiliary photographing lens and cooperate with thefirst lens mechanism 200 to make thesecond lens mechanism 300 more effective in refraction and diffraction, and in an alternative, in a case that thesecond lens 300b is a combination of the first refraction anddiffraction lens 310 and the second refraction anddiffraction lens 320, thesecond lens 300b is located between thefirst lens 300a and thefirst lens mechanism 200, so that better protection is achieved.

In the embodiment of the present application, the image capturing apparatus may further include anoptical filter 400, theoptical filter 400 is located between thephotosensitive chip 100 and thefirst lens mechanism 200, and the ambient light passing through thefirst lens mechanism 200 can be filtered by theoptical filter 400 and then projected onto thephotosensitive chip 100. Thefilter 400 can filter out interference light of the camera device in the shooting process, the type of thefilter 400 can be various, in an optional scheme, thefilter 400 can be an infrared filter, and the infrared filter can absorb infrared light in the ambient light passing through thefirst lens mechanism 200, so that the imaging effect of the camera device is better.

In the imaging device disclosed in the embodiment of the present application, the total number N of the lenses including the first foldeddiffraction lens 310 and the second foldeddiffraction lens 320 may satisfy that N is greater than or equal to 4 and less than or equal to 9. Wherein, all the lens surfaces of all the lenses at least comprise 4 aspheric surfaces.

Based on the image pickup device disclosed by the embodiment of the application, the electronic equipment disclosed by the embodiment of the application comprises the image pickup device.

The electronic device disclosed in the embodiment of the present application may be a smart phone, an AR (Augmented Reality) device, a game machine, an electronic book, or the like, and the embodiment of the present application does not limit the specific kind of the electronic device.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (13)

Translated fromChinese

1.一种摄像装置，其特征在于，包括感光芯片(100)、第一透镜机构(200)和第二透镜机构(300)，所述第一透镜机构(200)设于所述感光芯片(100)与所述第二透镜机构(300)之间，所述第二透镜机构(300)包括第一折衍射镜片(310)和第二折衍射镜片(320)，在向所述感光芯片(100)投射光线的方向上，所述第一折衍射镜片(310)、所述第二折衍射镜片(320)、所述第一透镜机构(200)和所述感光芯片(100)依次设置，通过所述第二透镜机构(300)的环境光线可依次被所述第一折衍射镜片(310)和所述第二折衍射镜片(320)折衍射，且经过折衍射后的所述环境光线可经过所述第一透镜机构(200)投射至所述感光芯片(100)上；1. An imaging device, characterized in that it comprises a photosensitive chip (100), a first lens mechanism (200) and a second lens mechanism (300), wherein the first lens mechanism (200) is provided on the photosensitive chip (200). 100) and the second lens mechanism (300), the second lens mechanism (300) includes a first refractive diffractive lens (310) and a second refractive diffractive lens (320). 100) In the direction of projecting light, the first refractive diffractive lens (310), the second refractive diffractive lens (320), the first lens mechanism (200) and the photosensitive chip (100) are arranged in sequence, The ambient light passing through the second lens mechanism (300) can be refracted and diffracted by the first refractive diffractive lens (310) and the second refractive diffractive lens (320) in sequence, and the ambient light after refracting and diffracting can be projected onto the photosensitive chip (100) through the first lens mechanism (200);所述第二透镜机构(300)还包括压印胶层(330)，所述压印胶层(330)设置在所述第一折衍射镜片(310)和第二折衍射镜片(320)之间，所述第一折衍射镜片(310)和所述第二折衍射镜片(320)通过所述压印胶层(330)相连，所述压印胶层(330)为折射率补偿层。The second lens mechanism (300) further includes an embossed rubber layer (330), and the embossed rubber layer (330) is disposed between the first refractive diffractive lens (310) and the second refractive diffractive lens (320). During this time, the first refractive diffractive lens (310) and the second refractive diffractive lens (320) are connected through the embossed adhesive layer (330), and the embossed adhesive layer (330) is a refractive index compensation layer.2.根据权利要求1所述的摄像装置，其特征在于，所述压印胶层(330)的厚度大于0.5μm且小于500μm，或者，所述压印胶层(330)的折射率大于1.3RIU且小于1.9RIU。2 . The imaging device according to claim 1 , wherein the thickness of the embossed adhesive layer ( 330 ) is greater than 0.5 μm and less than 500 μm, or the refractive index of the embossed adhesive layer ( 330 ) is greater than 1.3 RIU and less than 1.9RIU.3.根据权利要求1所述的摄像装置，其特征在于，所述第一折衍射镜片(310)和所述第二折衍射镜片(320)均为注塑结构件。3 . The imaging device according to claim 1 , wherein the first refractive diffractive lens ( 310 ) and the second refractive diffractive lens ( 320 ) are both injection-molded structural parts. 4 .4.根据权利要求1所述的摄像装置，其特征在于，所述第一折衍射镜片(310)的折射率大于1.3RIU且小于1.8RIU，或者，所述第二折衍射镜片(320)的折射率大于1.3RIU且小于1.8RIU。4. The imaging device according to claim 1, wherein the refractive index of the first refractive diffractive lens (310) is greater than 1.3 RIU and less than 1.8 RIU, or, the second refractive diffractive lens (320) has a refractive index greater than 1.3 RIU and less than 1.8 RIU. The refractive index is greater than 1.3 RIU and less than 1.8 RIU.5.根据权利要求1所述的摄像装置，其特征在于，所述第一折衍射镜片(310)包括多个同心设置的第一衍射凸起(312)，在所述第一折衍射镜片(310)的中心向远离所述中心的径向上，相邻的两个所述第一衍射凸起(312)的顶端之间的距离递减；或/和，5. The imaging device according to claim 1, wherein the first folded diffractive lens (310) comprises a plurality of concentrically arranged first diffractive protrusions (312), and the first folded diffractive lens (310) 310) in the radial direction away from the center, the distance between the top ends of two adjacent first diffractive protrusions (312) decreases; or/and,所述第二折衍射镜片(320)包括多个同心设置的第二衍射凸起(322)，在所述第二折衍射镜片(320)的中心向远离所述中心的径向上，相邻的两个所述第二衍射凸起(322)的顶端之间的距离递减。The second folded diffractive lens (320) includes a plurality of concentrically arranged second diffractive protrusions (322), and in the radial direction away from the center from the center of the second folded diffractive lens (320), adjacent The distance between the top ends of the two second diffractive protrusions (322) decreases gradually.6.根据权利要求5所述的摄像装置，其特征在于，相邻的两个所述第一衍射凸起(312)的顶端之间的距离大于0.5μm且小于300μm，和/或，相邻的两个所述第二衍射凸起(322)的顶端之间的距离大于0.5μm且小于300μm。6 . The imaging device according to claim 5 , wherein the distance between the top ends of two adjacent first diffractive protrusions ( 312 ) is greater than 0.5 μm and less than 300 μm, and/or adjacent The distance between the top ends of the two second diffractive protrusions (322) is greater than 0.5 μm and less than 300 μm.7.根据权利要求5所述的摄像装置，其特征在于，所述第一衍射凸起(312)的高度大于0.1μm且小于30μm，和/或，所述第二衍射凸起(322)的高度大于0.1μm且小于30μm。7. The imaging device according to claim 5, wherein the height of the first diffractive protrusion (312) is greater than 0.1 μm and less than 30 μm, and/or the height of the second diffractive protrusion (322) is The height is greater than 0.1 μm and less than 30 μm.8.根据权利要求5所述的摄像装置，其特征在于，所述第一衍射凸起(312)与所述第二衍射凸起(322)分别设于所述第一折衍射镜片(310)和所述第二折衍射镜片(320)相对的表面上。8 . The imaging device according to claim 5 , wherein the first diffractive protrusion ( 312 ) and the second diffractive protrusion ( 322 ) are respectively provided on the first refractive diffractive lens ( 310 ). 9 . on the surface opposite to the second refractive diffractive lens (320).9.根据权利要求5所述的摄像装置，其特征在于，所述第一折衍射镜片(310)包括第一基层(311)，所述第一衍射凸起(312)设置于所述第一基层(311)上；和/或，所述第二折衍射镜片(320)包括第二基层(321)，所述第二衍射凸起(322)设置于所述第二基层(321)上。9 . The imaging device according to claim 5 , wherein the first folded diffractive lens ( 310 ) comprises a first base layer ( 311 ), and the first diffractive protrusions ( 312 ) are disposed on the first on the base layer (311); and/or, the second refractive diffractive lens (320) includes a second base layer (321), and the second diffractive protrusions (322) are disposed on the second base layer (321).10.根据权利要求1所述的摄像装置，其特征在于，所述第一基层(311)的厚度大于0.05mm且小于0.6mm，或，所述第二基层(321)的厚度大于0.05mm且小于0.6mm。10. The imaging device according to claim 1, wherein the thickness of the first base layer (311) is greater than 0.05mm and less than 0.6mm, or the thickness of the second base layer (321) is greater than 0.05mm and less than 0.6mm.11.根据权利要求1所述的摄像装置，其特征在于，所述第二透镜机构(300)包括第一透镜(300a)和第二透镜(300b)，所述第一透镜(300a)包括所述第一折衍射镜片(310)和所述第二折衍射镜片(320)，所述第二透镜(300b)位于所述第一透镜(300a)背离所述第一透镜机构(200)的一侧，或者，所述第二透镜(300b)位于所述第一透镜(300a)与所述第一透镜机构(200)之间。11. The imaging device according to claim 1, wherein the second lens mechanism (300) comprises a first lens (300a) and a second lens (300b), and the first lens (300a) comprises all The first refractive diffractive lens (310) and the second refractive diffractive lens (320), the second lens (300b) is located at a position of the first lens (300a) away from the first lens mechanism (200). Alternatively, the second lens (300b) is located between the first lens (300a) and the first lens mechanism (200).12.根据权利要求1所述的摄像装置，其特征在于，所述摄像装置还包括滤光片(400)，所述滤光片(400)位于所述感光芯片(100)与所述第一透镜机构(200)之间。12. The imaging device according to claim 1, characterized in that, the imaging device further comprises a filter (400), and the filter (400) is located between the photosensitive chip (100) and the first between the lens mechanisms (200).13.一种电子设备，其特征在于，包括权利要求1-12中任一项所述的摄像装置。13. An electronic device, characterized in that it comprises the camera device according to any one of claims 1-12.

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