CN101634738A - Lens module and camera module - Google Patents

Abstract

The invention provides a lens module, comprising a lens barrel, a first lens, a second lens and a spacer ring. The first lens, the spacer ring and the second lens are sequentially arranged in the lens barrel along the optical axis. The spacer ring is provided with a first surface, a second surface opposite to the first surface and an inner wall connecting the first surface and the second surface, wherein, the first surface is in contact with the first lens and the second surface is in contact with the second lens; the inner wall comprises a first bevel and a second bevel, which are connected with each other; the first bevel and the first surface form an acute angle; the second bevel and the second surface also form an acute angle. The flare can be effectively reduced, thus improving the imaging quality of the lens module. The invention also provides a camera module with the lens module.

Description

Camera lens module and camera module

Technical field

The present invention relates to technical field of optical, relate in particular to a kind of camera module that reduces the camera lens module of dazzle and have this camera lens module.

Background technology

Along with the development of electronic product multifunction, the camera module is used widely in consumption electronic products such as mobile phone, notebook computer, personal digital assistant.People wish that also electronic product has good image effect when pursuing multifunction,, wish that the camera module has high-quality image quality that is.Takano, H is published on February nineteen ninety-five " ConsumerElectronics " one piece " Two-phase direct-drive motor built into a camcorderszoom lens barrel " article by name, disclosed a kind of camera module, it has high-quality image quality, has the advantage of compact conformation simultaneously.

The camera module normally is made up of lens barrel that optical element is housed and the microscope base that is provided with image sensor.See alsocamera module 200 shown in Figure 5, it comprisesmicroscope base 210,lens barrel 220,first eyeglass 230,second eyeglass 240, spacedring 250, and image sensor 260.Spacedring 250 is arranged betweenfirst eyeglass 230 andsecond eyeglass 240, and it is used at intervalfirst eyeglass 230 andsecond eyeglass 240, and is impaired to prevent between the adjacent mirror generation friction orcollision.Lens barrel 220 is fixed the relative position of adjustinglens barrel 220 andmicroscope base 210 by being threaded in themicroscope base 210, and the imaging surface of the formed optical system of optical mirror slip in thelens barrel 220 is dropped on the described image sensor 260.Yet, part incident ray 270 is not directly to enterimage sensor 260 after reflecting, but entersimage sensor 260 on the surface of spacedring 250 after reflecting, thereby forms dazzle, cause image fog, the existence of dazzle has had a strong impact on the quality of captured image.

Therefore, be necessary to provide a kind of camera module that can reduce the camera lens module of dazzle and have this camera lens module.

Summary of the invention

To a kind of camera lens module be described with specific embodiment below.

The invention provides a kind of camera lens module, it comprises lens barrel, first eyeglass, second eyeglass and spaced ring, described first eyeglass, the spaced ring and second eyeglass are set in turn in the lens barrel along optical axis, described spaced ring has first surface, with the first surface opposing second surface and be connected first surface and the inwall of second surface, described first surface contacts with first eyeglass, described second surface contacts with second eyeglass, it is characterized in that, described inwall comprises first inclined-plane and second inclined-plane that is connected, the angle of described first inclined-plane and first surface is an acute angle, and the angle of described second inclined-plane and second surface also is an acute angle.The present invention also provides a kind of camera module with this camera lens module.

With respect to prior art, the camera lens module of the technical program utilizes the direct or indirect scattering or the reflex on first inclined-plane and second inclined-plane of described spaced ring, can make the light of the inwall that incides spaced ring reflex to the thing side direction, make final directive disperse to weaken near reflected light as the image sensor of side, can effectively reduce dazzle, improve the image quality of camera lens module.

Description of drawings

Fig. 1 is the cut-open view of the camera module that provides of the technical program first embodiment.

Fig. 2 is the cut-open view of the spaced ring that provides of the technical program first embodiment.

Fig. 3 is the cut-open view of the spaced ring that provides of the technical program second embodiment.

Fig. 4 is the cut-open view of the spaced ring that provides of the technical program the 3rd embodiment.

Fig. 5 is the cut-open view of camera module in the prior art.

Embodiment

Below in conjunction with a plurality of embodiment and accompanying drawing the camera lens module of the technical program and camera module with this camera lens module are described in further detail.

See also Fig. 1 and Fig. 2, thecamera module 1 that the technical program first embodiment provides comprisescamera lens module 10,microscope base 20 andimage sensor 30.

Describedmicroscope base 20 has acceptinghole 22, and the inwall of described acceptinghole 22 is provided with internal thread.Describedcamera lens module 10 andimage sensor 30 are contained in the both sides of accepting hole 22.Describedcamera lens module 10 is used to form optical imagery.Describedimage sensor 30 is positioned at the picture side ofcamera module 1, and it is connected with printed circuit board (PCB) 40 and is converted to electrical signal and transfers to the external world with the digital signal with image sensor 30.Describedimage sensor 30 can be charge-coupled image sensor (Charge Coupled Device, be called for short CCD) or CMOS (Complementary Metal Oxide Semiconductor) transistor (Complementary Metal Oxide SemiconductorTransistor, be called for short CMOS), be used for the optical imagery conversion of signals is become digital signal.

Particularly, describedcamera lens module 10 compriseslens barrel 11,first eyeglass 12,second eyeglass 13 and spacedring 14.

Describedlens barrel 11 is a cylinder, comprisesbarrel 101 and lens cap 111.Describedlens barrel 11 is provided with the external thread that matches with describedmicroscope base 20, therebylens barrel 11 can be fixed by threaded engagement with microscope base 20.Thebarrel 101 of describedlens barrel 11 surrounds and formscolumniform accepting hole 102, and described acceptinghole 102 is used to accommodate describedfirst eyeglass 12, spacedring 14 and second eyeglass 13.Describedlens cap 111 has thelight hole 104 of a circle, so that extraneous light can incide in thelens barrel 11 bylight hole 104.

Describedfirst eyeglass 12, spacedring 14 andsecond eyeglass 13 are contained in thelens barrel 11 successively along optical axis.Describedfirst eyeglass 12 is near the thing side, and it comprisesfirst optic 121 that is positioned at the center of lens part and firstnon-optical division 122 that is provided with around first optic 121.Describedfirst optic 121 is used for realizing in imaging process the optical function of design.Described first non-opticaldivision 122 does not participate in imaging, is used to support first optic 121.Described firstnon-optical division 122 has the firstrelative abutment face 123 and second abutment face 124.Describedfirst abutment face 123 contact with thelens cap 111 oflens barrel 11 against.Describedsecond abutment face 124 contact with spacedring 14 against.

Describedsecond eyeglass 13 is near the picture sides, and it comprises second optic 131 that is positioned at the center of lens part and around secondnon-optical division 132 of second optic 131.Described second optic 131 is used for realizing in imaging process the optical function of design.Described second non-opticaldivision 132 does not participate in imaging.Described second non-opticaldivision 132 has threeabutment face 133 relative with first eyeglass 12.Described the3rd abutment face 133 contact with spacedring 14 against.

Described spacedring 14 is an annulus, betweenfirst eyeglass 12 andsecond eyeglass 13, is used forfirst eyeglass 12 andsecond eyeglass 13 at interval.Described spacedring 14 havefirst surface 141, withfirst surface 141 opposingsecond surface 142 and theinwall 143 andouter wall 144 that are connectedfirst surface 141 and second surface 142.Describedfirst surface 141 contact withsecond abutment face 124 offirst eyeglass 12 against, describedsecond surface 142 contact with the3rd abutment face 133 ofsecond eyeglass 13 against.

Describedinwall 143 comprises first inclined-plane 145 and second inclined-plane 146 that is connected.Described first inclined-plane 145 is an acute angle theta with the angle offirst surface 141₁Described second inclined-plane 146 also is an acute angle theta with the angle ofsecond surface 142₂Form an angle theta between described first inclined-plane 145 and second inclined-plane 146.Because describedfirst surface 141 is parallel withsecond surface 142, thereby the size of described angle theta equals acute angle theta₁With acute angle theta₂Sum.Preferably, the scope of the value of described angle theta is 50 ° ~ 90 °.

Describedouter wall 144 contacts with barrel.If describedinwall 143 is L with the distance ofouter wall 144 onfirst surface 141₁, the distance onsecond surface 142 is L₂, then according to the difference of the optical parametric offirst eyeglass 12, L₁Value both can be greater than L₂Value, also can be less than or equal to L₂Value.In the present embodiment, L₁Value both can be greater than L₂Value.Described spacedring 14 can be one-body molded, also can assembled configuration.In the present embodiment, described spacedring 14 is formed in one.The material of described spacedring 14 is an opaque-plastic.

When describedcamera module 1 is worked, most of incident ray can pass first optic 121 of describedfirst eyeglass 12, second optic 131 ofsecond eyeglass 13 successively, thereby onimage sensor 30, form image and transfer to the external world by printed circuit board (PCB) 40, but have fraction light after passing first optic 121 offirst eyeglass 12, theinwall 143 of meeting directive spacedring 14 also reflects.Because thespaced ring 143 in the technical program has first inclined-plane 145 and second inclined-plane 146 that is connected, thereby, a part of light ofdirective inwall 143 may be directly by 146 scatterings of second inclined-plane or reflex to the thing side direction.Another part light ofdirective inwall 143 may arrive described first inclined-plane 145 earlier, again by 145 scatterings of first inclined-plane or reflex to second inclined-plane 146, again through 146 scatterings of second inclined-plane or reflex to the thing side direction.Thereby, the light that incides theinwall 143 of spacedring 14 can the be tried one's best scattering or reflex to the thing side direction of described spacedring 14, disperse and weakened the reflected light of theimage sensor 30 of the close picture of final directive side, avoided a large amount of reflected light to enter intoimage sensor 30 and the formation dazzle, made the phenomenon of image fog.

Certainly, for the ease of making moulding, spaced ring also can be divided into a plurality of parts and carry out assembly.See also Fig. 3, the spacedring 24 that the technical program second embodiment provides comprisesfirst spacer portion 241 and second spacer portion 242.Describedfirst spacer portion 241 andsecond spacer portion 242 are semi-circular structure.Describedfirst spacer portion 241 hasfirst mating surface 243, and describedsecond spacer portion 242 has and first mating surface, 243 corresponding second mating surfaces 244.Preferably, describedfirst mating surface 243 andsecond mating surface 244 are the inclined-plane.In the present embodiment, describedfirst mating surface 243 is an acute angle with the angle offirst surface 245, with the angle ofsecond surface 246 be the obtuse angle.Describedsecond mating surface 244 is the obtuse angle with the angle offirst surface 245, with the angle ofsecond surface 246 be acute angle.And the angle offirst mating surface 243 andfirst surface 245 equals the angle ofsecond mating surface 244 andsecond surface 246, and the angle offirst mating surface 243 andsecond mating surface 246 equals the angle ofsecond mating surface 244 and first surface 245.Therebyfirst spacer portion 241 can engage with the 244 mutual breastings of second mating surface byfirst mating surface 243 withsecond spacer portion 242, and with bonding agent the fixing spacedring 24 that forms of bonding or alternate manner.Thereby described spacedring 24 has first inclined-plane 247 and second inclined-plane 248.The angle on described first inclined-plane 247 and second inclined-plane 248 is an acute angle.Preferably, the scope of the angle on described first inclined-plane 247 and second inclined-plane 248 is 50 ° ~ 90 °.

See also Fig. 4, the spacedring 34 that the technical program the 3rd embodiment provides comprises first spacedring 341 and second spaced ring 342.Described first spacedring 341 and second spacedring 342 are annular.First spacedring 341 has first surface 343,347 and first inclined-plane 345, the 3rd surface.Second spacedring 342 has second surface 344,348 and second inclined-plane 346, the 4th surface.Therebyfirst spacer portion 341 andsecond spacer portion 342 can engage with the mutual breasting on the4th surface 348 by the3rd surface 347, and bonding or alternate manner is fixed formation spacedring 34 with bonding agent.The angle on described first inclined-plane 345 and second inclined-plane 346 is an acute angle.Preferably, the scope of the angle on described first inclined-plane 345 and second inclined-plane 346 is 50 ° ~ 90 °.

Certainly, when described camera lens module comprised eyeglass more than three or three, it can also comprise two or more spaced rings, thereby between adjacent two eyeglasses a spaced ring had been set all arbitrarily.In addition, described spaced ring also can be arranged between eyeglass and the cutoff filter.In a word, all can be between any two optical elements that produce dazzle owing to reflecting by described spaced ring being set to avoid the formation of dazzle.

With respect to prior art, the camera lens module of the technical program has following advantage: it utilizes the direct or indirect scattering or the reflex on first inclined-plane and second inclined-plane of described spaced ring, can make the light of the inwall that incides spaced ring reflex to the thing side direction, make final directive disperse to weaken near reflected light as the image sensor of side, can effectively reduce dazzle, and improve the image quality of camera lens module.

Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion, and all these change the protection domain that all should belong to the technical program claim with distortion according to the technical conceive of the technical program.

Claims (10)

1. camera lens module, it comprises lens barrel, first eyeglass, second eyeglass and spaced ring, described first eyeglass, the spaced ring and second eyeglass are set in turn in the lens barrel along optical axis, described spaced ring has first surface, with the first surface opposing second surface and be connected first surface and the inwall of second surface, described first surface contacts with first eyeglass, described second surface contacts with second eyeglass, it is characterized in that, described inwall comprises first inclined-plane and second inclined-plane that is connected, the angle of described first inclined-plane and first surface is an acute angle, and the angle of described second inclined-plane and second surface also is an acute angle.

2. camera lens module as claimed in claim 1 is characterized in that, the angle on described first inclined-plane and second inclined-plane is 50 ° ~ 90 °.

3. camera lens module as claimed in claim 1 is characterized in that described first surface is parallel with second surface.

4. camera lens module as claimed in claim 1 is characterized in that, described spaced ring is an annulus.

5. camera lens module as claimed in claim 1, it is characterized in that, described spaced ring comprises first spacer portion and second spacer portion, described first spacer portion and second spacer portion are semi-circular structure, first spacer portion has first mating surface, the angle of described first mating surface and first surface is an acute angle, with the angle of second surface be the obtuse angle, described second spacer portion has and corresponding second mating surface of first mating surface.

6. camera lens module as claimed in claim 1, it is characterized in that, described spaced ring comprises first spaced ring and second spaced ring that is connected, described first spaced ring and second spaced ring are loop configuration, the described first surface and first inclined-plane are positioned at first spaced ring, and the described second surface and second inclined-plane are positioned at second spaced ring.

7. camera lens module as claimed in claim 1 is characterized in that, the material of described spaced ring is an opaque-plastic.

8. camera module, it comprises microscope base, is contained in the image sensor and the camera lens module as claimed in claim 1 of microscope base, and described microscope base has and the corresponding accepting hole of lens barrel, and described lens barrel is contained in described accepting hole.

9. camera module as claimed in claim 8 is characterized in that, described image sensor is positioned at the picture side of described camera module.

10. camera module as claimed in claim 8 is characterized in that described lens barrel and microscope base are fixed by threaded engagement.

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