Detailed Description
For a better understanding of the application, various aspects of the application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the application and is not intended to limit the scope of the application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.
It should be noted that in the present specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the feature. Accordingly, a first lens discussed below may also be referred to as a second lens or a third lens without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lenses have been slightly exaggerated for convenience of explanation. In particular, the spherical or aspherical shape shown in the drawings is shown by way of example. That is, the shape of the spherical or aspherical surface is not limited to the shape of the spherical or aspherical surface shown in the drawings. The figures are merely examples and are not drawn to scale.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, then the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is referred to as the object side of the lens, and the surface of each lens closest to the imaging plane is referred to as the image side of the lens.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "having," "containing," and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. Furthermore, when a statement such as "at least one of the following" appears after a list of features that are listed, the entire listed feature is modified instead of modifying a separate element in the list. Furthermore, when describing embodiments of the application, use of "may" means "one or more embodiments of the application. Also, the term "exemplary" is intended to refer to an example or illustration.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
The features, principles, and other aspects of the present application are described in detail below.
The optical imaging lens according to an exemplary embodiment of the present application may include six lenses having optical power, namely, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens. The six lenses are arranged in order from the object side to the image side along the optical axis. Any two adjacent lenses among the first to sixth lenses may have a separation distance.
In an exemplary embodiment, the first lens may have positive optical power; the second lens may have negative optical power, and an image side surface thereof may be concave; the third lens has optical power; the fourth lens may have negative optical power; the fifth lens element has optical power, wherein an object-side surface of the fifth lens element can be convex, and an image-side surface of the fifth lens element can be concave; the sixth lens element has an optical power, wherein an object-side surface thereof can be convex and an image-side surface thereof can be concave.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -5.1 < f4/f < -3.1, wherein f4 is the effective focal length of the fourth lens and f is the total effective focal length of the optical imaging lens. More specifically, f4 and f further satisfy: -5.1 < f4/f < -3.3. The relationship between the effective focal length of the fourth lens and the total effective focal length of the optical imaging lens is reasonably configured, so that the miniaturization characteristic of the optical imaging lens can be ensured while the aberration correction of the fourth lens is considered.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1.5 < f/EPD < 2, where f is the total effective focal length of the optical imaging lens and EPD is the entrance pupil diameter of the optical imaging lens. More specifically, f and EPD may further satisfy: 1.7 < f/EPD < 2. The f/EPD is arranged in the range, so that the optical imaging lens can be ensured to have larger light intake, and the imaging performance under the dark scene is ensured.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 1 < TTL/ImgH < 1.5, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the optical imaging lens on the optical axis, and ImgH is half of the diagonal length of the effective pixel area on the imaging surface of the optical imaging lens. More specifically, TTL and ImgH can further satisfy: 1.20 < TTL/ImgH < 1.45. The relationship between TTL and ImgH of the optical imaging lens is reasonably distributed, so that a compromise can be obtained between miniaturization and large imaging surface, and the large imaging surface is realized on the basis of ensuring miniaturization.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -0.5 < f1/f2 < 0, where f1 is the effective focal length of the first lens and f2 is the effective focal length of the second lens. More specifically, f1 and f2 may further satisfy: -0.4 < f1/f2 < -0.2. Satisfies-0.5 < f1/f2 < 0, can reasonably control residual errors after balancing positive and negative spherical aberration of the first lens and the second lens in a smaller reasonable range, is favorable for the following lens to balance residual spherical aberration with smaller burden, and further enables the optical imaging lens to ensure image quality near the on-axis visual field more easily.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: Σat/TD < 0.30, where Σat is the sum of the distances between any two adjacent lenses of the first lens element to the sixth lens element on the optical axis, and TD is the distance between the object side surface of the first lens element and the image side surface of the sixth lens element on the optical axis. More specifically, Σat and TD may further satisfy: ΣAT/TD < 0.30. Satisfies ΣAT/TD < 0.30, can realize compact structure, and effectively guarantees that lens thickness is in reasonable processing scope.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.9 < CT3/CT4 < 1.3, wherein CT3 is the center thickness of the third lens and CT4 is the center thickness of the fourth lens. More specifically, CT3 and CT4 may further satisfy: CT3/CT4 is more than 1.0 and less than 1.3. The axial chromatic aberration of the optical imaging lens can be corrected favorably when the CT3/CT4 is smaller than 1.3 and is smaller than 0.9, so that the optical imaging lens has higher imaging quality.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 7 < (R11+R12)/(R11-R12) < 10, wherein R11 is the radius of curvature of the object-side surface of the sixth lens, and R12 is the radius of curvature of the image-side surface of the sixth lens. More specifically, R11 and R12 may further satisfy: 7.5 < (R11+R12)/(R11-R12) < 9.0. Satisfying 7 < (R11+R12)/(R11-R12) < 10, not only can effectively control the contribution of the astigmatic quantity of the object side surface of the sixth lens and the image side surface of the sixth lens, but also can reasonably control the image quality of the intermediate view field and the aperture zone.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: CT6/TTL is more than 0.12 and less than 0.17, wherein CT6 is the center thickness of the sixth lens, and TTL is the distance from the object side surface of the first lens to the imaging surface of the optical imaging lens on the optical axis. The thickness of the sixth lens can be effectively ensured to ensure that the distortion and the chromatic aberration can be better corrected when the CT6/TTL is smaller than 0.17 and smaller than 0.12.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.1 < SAG41/CT4 < -0.5, wherein SAG41 is the distance on the optical axis between the intersection of the object side surface of the fourth lens and the optical axis and the apex of the effective radius of the object side surface of the fourth lens, and CT4 is the center thickness of the fourth lens. Meets the condition that SAG41/CT4 is less than-1.1 and less than-0.5, can effectively ensure the surface type change of the fourth lens, meets the processing requirement of the fourth lens, and can reduce the sensitivity of the object side surface of the fourth lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 0.6 < ET5/ET6 < 1.2, wherein ET5 is the edge thickness of the fifth lens and ET6 is the edge thickness of the sixth lens. More specifically, ET5 and ET6 may further satisfy: ET5/ET6 is more than 0.6 and less than 1.1. Meets the requirements of 0.6 < ET5/ET6 < 1.2 and can better ensure the processability and manufacturability of the lens.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.5 < DT51/CT5 < 3.7, where DT51 is the maximum effective radius of the object side of the fifth lens and CT5 is the center thickness of the fifth lens. Satisfies 2.5 < DT51/CT5 < 3.7, not only can effectively satisfy the processing requirement of the fifth lens, but also can help to correct chromatic dispersion.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: r1/f is less than 0.5, wherein R1 is the curvature radius of the object side surface of the first lens, and f is the total effective focal length of the optical imaging lens. More specifically, R1 and f may further satisfy: r1/f is less than 0.4. The R1/f is less than 0.5, the performance of the optical imaging lens can be ensured, the tolerance sensitivity is reduced, and the optical imaging lens has better mass production feasibility.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: 2.4 < R10/f < 3, wherein R10 is the radius of curvature of the image side surface of the fifth lens, and f is the total effective focal length of the optical imaging lens. More specifically, R10 and f may further satisfy: r10/f is more than 2.4 and less than 2.9. Satisfies R10/f less than 3 and 2.4, is beneficial to obtaining a larger aperture angle and correcting the spherical aberration.
In an exemplary embodiment, the optical imaging lens according to the present application may satisfy: -1.5 < f3/f6 <0, wherein f3 is the effective focal length of the third lens and f6 is the effective focal length of the sixth lens. More specifically, f3 and f6 may further satisfy: -1.2 < f3/f6 <0. Satisfies that f3/f6 is less than 0 and is less than-1.5, and can balance the spherical aberration generated by the other lenses by the residual spherical aberration of the third lens and the sixth lens after balancing, thereby carrying out fine tuning and control on the spherical aberration of the optical imaging lens and enhancing the accurate control on the on-axis visual field aberration.
In an exemplary embodiment, the optical imaging lens according to the present application further includes a diaphragm disposed between the object side and the first lens. Optionally, the optical imaging lens may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on the imaging surface. The optical imaging lens according to the above embodiment of the present application may employ a plurality of lenses, for example, six lenses as described above. By reasonably distributing the focal power, the surface shape, the center thickness of each lens, the axial spacing between each lens and the like of each lens, incident light rays can be effectively converged, the optical total length of the imaging lens is reduced, and the processability of the imaging lens is improved, so that the optical imaging lens is more beneficial to production and processing.
In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror, i.e., at least one of the object side surface of the first lens to the image side surface of the sixth lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, and has advantages of improving distortion aberration and improving astigmatic aberration. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality. Optionally, at least one of an object side surface and an image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, and the sixth lens is an aspherical mirror surface. Optionally, the object side surface and the image side surface of each of the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are aspherical mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses making up the optical imaging lens can be varied to achieve the various results and advantages described in this specification without departing from the technical solution claimed in the present application. For example, although six lenses are described as an example in the embodiment, the optical imaging lens is not limited to include six lenses. The optical imaging lens may also include other numbers of lenses, if desired.
Specific examples of the optical imaging lens applicable to the above-described embodiments are further described below with reference to the accompanying drawings.
Example 1
An optical imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an optical imaging lens according to embodiment 1 of the present application.
As shown in fig. 1, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
Table 1 shows the basic parameter table of the optical imaging lens of embodiment 1, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In this example, the total effective focal length f of the optical imaging lens is 4.77mm, the total length TTL of the optical imaging lens (i.e., the distance on the optical axis from the object side surface S1 of the first lens E1 to the imaging surface S15 of the optical imaging lens) is 5.77mm, and the half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.13mm.
In embodiment 1, the object side surface and the image side surface of any one of the first lens E1 to the sixth lens E6 are aspherical, and the surface profile x of each aspherical lens can be defined by, but not limited to, the following aspherical formula:
Wherein x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at the position with the height h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c=1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the aspherical i-th order. The following Table 2 shows the higher order coefficients A4、A6、A8、A10、A12、A14、A16、A18 and A20 that can be used for each of the aspherical mirrors S1-S12 in example 1.
TABLE 2
Fig. 2A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 1, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve of the optical imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 2C shows a distortion curve of the optical imaging lens of embodiment 1, which represents distortion magnitude values corresponding to different image heights. Fig. 2D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 2A to 2D, the optical imaging lens provided in embodiment 1 can achieve good imaging quality.
Example 2
An optical imaging lens according to embodiment 2 of the present application is described below with reference to fig. 3 to 4D. In this embodiment and the following embodiments, descriptions of portions similar to embodiment 1 will be omitted for brevity. Fig. 3 shows a schematic configuration of an optical imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 4.77mm, the total length TTL of the optical imaging lens is 5.78mm, and the half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.13mm.
Table 3 shows the basic parameter table of the optical imaging lens of embodiment 2, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 4 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 2, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 3 Table 3
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -4.7135E-04 | 1.9357E-02 | -5.5231E-02 | 1.0076E-01 | -1.1663E-01 | 8.6850E-02 | -4.1258E-02 | 1.1498E-02 | -1.4871E-03 |
| S2 | -5.2496E-02 | -2.3805E-02 | 2.5864E-01 | -6.9020E-01 | 1.0528E+00 | -9.8940E-01 | 5.6094E-01 | -1.7551E-01 | 2.3204E-02 |
| S3 | -8.7048E-02 | 7.0036E-02 | -7.6760E-02 | 3.2060E-01 | -7.6962E-01 | 1.0129E+00 | -7.5801E-01 | 3.0523E-01 | -5.1418E-02 |
| S4 | -4.1171E-02 | -2.6948E-02 | 3.9513E-01 | -1.2362E+00 | 2.4565E+00 | -3.1832E+00 | 2.5847E+00 | -1.1887E+00 | 2.3712E-01 |
| S5 | -1.8226E-02 | -2.3936E-02 | 1.1649E-01 | -6.3825E-01 | 1.7528E+00 | -2.7690E+00 | 2.5330E+00 | -1.2530E+00 | 2.6140E-01 |
| S6 | -2.3088E-02 | -3.4252E-02 | 1.0393E-01 | -2.5539E-01 | 3.6335E-01 | -3.2567E-01 | 1.8416E-01 | -6.0658E-02 | 9.1819E-03 |
| S7 | -4.9330E-02 | -5.2999E-02 | 1.1688E-01 | -1.0927E-01 | 1.3214E-02 | 6.2187E-02 | -5.5988E-02 | 2.0486E-02 | -2.9003E-03 |
| S8 | 2.3402E-02 | -2.0972E-01 | 2.6910E-01 | -2.0341E-01 | 9.5505E-02 | -2.4985E-02 | 2.7488E-03 | 8.7787E-05 | -3.1495E-05 |
| S9 | 1.5346E-01 | -2.9605E-01 | 2.9478E-01 | -2.1884E-01 | 1.1238E-01 | -3.7850E-02 | 7.9057E-03 | -9.1937E-04 | 4.5146E-05 |
| S10 | 1.6190E-02 | -4.7118E-03 | -1.2403E-02 | 7.9828E-03 | -2.3223E-03 | 3.6564E-04 | -2.8959E-05 | 6.8099E-07 | 2.4842E-08 |
| S11 | -2.3229E-01 | 1.0200E-01 | -3.4314E-02 | 8.9440E-03 | -1.6433E-03 | 1.9992E-04 | -1.5261E-05 | 6.6270E-07 | -1.2514E-08 |
| S12 | -1.8116E-01 | 7.2648E-02 | -2.4870E-02 | 6.0629E-03 | -1.0049E-03 | 1.1029E-04 | -7.6349E-06 | 3.0043E-07 | -5.1084E-09 |
TABLE 4 Table 4
Fig. 4A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 2, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve of the optical imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 4C shows a distortion curve of the optical imaging lens of embodiment 2, which represents distortion magnitude values corresponding to different image heights. Fig. 4D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 4A to 4D, the optical imaging lens provided in embodiment 2 can achieve good imaging quality.
Example 3
An optical imaging lens according to embodiment 3 of the present application is described below with reference to fig. 5 to 6D. Fig. 5 shows a schematic configuration diagram of an optical imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 4.77mm, the total length TTL of the optical imaging lens is 5.34mm, and half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.13mm.
Table 5 shows the basic parameter table of the optical imaging lens of embodiment 3, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 6 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 3, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 5
TABLE 6
Fig. 6A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 3, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve of the optical imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 6C shows a distortion curve of the optical imaging lens of embodiment 3, which represents distortion magnitude values corresponding to different image heights. Fig. 6D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 3, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 6A to 6D, the optical imaging lens provided in embodiment 3 can achieve good imaging quality.
Example 4
An optical imaging lens according to embodiment 4 of the present application is described below with reference to fig. 7 to 8D. Fig. 7 shows a schematic configuration diagram of an optical imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has negative refractive power, wherein an object-side surface S9 thereof is convex and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 4.77mm, the total length TTL of the optical imaging lens is 5.28mm, and half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.13mm.
Table 7 shows a basic parameter table of the optical imaging lens of example 4, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 8 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 4, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 7
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -5.0694E-04 | 1.9061E-02 | -5.3948E-02 | 9.7218E-02 | -1.1061E-01 | 8.0590E-02 | -3.7419E-02 | 1.0226E-02 | -1.3126E-03 |
| S2 | -5.2149E-02 | -2.0709E-02 | 2.5105E-01 | -6.7397E-01 | 1.0282E+00 | -9.6551E-01 | 5.4685E-01 | -1.7094E-01 | 2.2576E-02 |
| S3 | -8.8875E-02 | 7.3979E-02 | -8.1945E-02 | 3.3057E-01 | -7.9008E-01 | 1.0406E+00 | -7.7985E-01 | 3.1448E-01 | -5.3056E-02 |
| S4 | -4.1935E-02 | -2.4869E-02 | 3.9396E-01 | -1.2377E+00 | 2.4630E+00 | -3.1950E+00 | 2.5982E+00 | -1.1970E+00 | 2.3931E-01 |
| S5 | -3.2597E-02 | -2.4792E-02 | 1.2350E-01 | -6.7016E-01 | 1.8205E+00 | -2.8587E+00 | 2.6054E+00 | -1.2858E+00 | 2.6777E-01 |
| S6 | -2.3462E-02 | -3.6447E-02 | 1.1205E-01 | -2.7451E-01 | 3.9162E-01 | -3.5191E-01 | 1.9927E-01 | -6.5594E-02 | 9.8881E-03 |
| S7 | -5.1312E-02 | -5.2422E-02 | 1.1901E-01 | -1.1777E-01 | 2.6071E-02 | 5.1815E-02 | -5.1240E-02 | 1.9361E-02 | -2.8027E-03 |
| S8 | 2.2382E-02 | -2.0584E-01 | 2.6287E-01 | -1.9689E-01 | 9.0935E-02 | -2.2857E-02 | 2.1274E-03 | 1.8922E-04 | -3.8502E-05 |
| S9 | 1.5277E-01 | -2.9475E-01 | 2.9345E-01 | -2.1785E-01 | 1.1193E-01 | -3.7751E-02 | 7.9003E-03 | -9.2085E-04 | 4.5333E-05 |
| S10 | 1.6043E-02 | -5.1619E-03 | -1.1847E-02 | 7.6758E-03 | -2.2244E-03 | 3.4618E-04 | -2.6551E-05 | 5.0968E-07 | 3.0232E-08 |
| S11 | -2.3308E-01 | 1.0268E-01 | -3.4508E-02 | 8.9562E-03 | -1.6378E-03 | 1.9840E-04 | -1.5088E-05 | 6.5286E-07 | -1.2285E-08 |
| S12 | -1.8110E-01 | 7.2645E-02 | -2.4826E-02 | 6.0349E-03 | -9.9680E-04 | 1.0901E-04 | -7.5185E-06 | 2.9485E-07 | -4.9978E-09 |
TABLE 8
Fig. 8A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 4, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve of the optical imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 8C shows a distortion curve of the optical imaging lens of embodiment 4, which represents distortion magnitude values corresponding to different image heights. Fig. 8D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 4, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 8A to 8D, the optical imaging lens provided in embodiment 4 can achieve good imaging quality.
Example 5
An optical imaging lens according to embodiment 5 of the present application is described below with reference to fig. 9 to 10D. Fig. 9 shows a schematic configuration of an optical imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave and an image-side surface S8 thereof is convex. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 4.77mm, the total length TTL of the optical imaging lens is 5.15mm, and half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.13mm.
Table 9 shows a basic parameter table of the optical imaging lens of embodiment 5, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 10 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 5, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 9
Table 10
Fig. 10A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 5, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve of the optical imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 10C shows a distortion curve of the optical imaging lens of embodiment 5, which represents distortion magnitude values corresponding to different image heights. Fig. 10D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 10A to 10D, the optical imaging lens provided in embodiment 5 can achieve good imaging quality.
Example 6
An optical imaging lens according to embodiment 6 of the present application is described below with reference to fig. 11 to 12D. Fig. 11 shows a schematic structural diagram of an optical imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the optical imaging lens sequentially includes, from an object side to an image side: stop STO, first lens E1, second lens E2, third lens E3, fourth lens E4, fifth lens E5, sixth lens E6, filter E7, and imaging plane S15.
The first lens element E1 has positive refractive power, wherein an object-side surface S1 thereof is convex, and an image-side surface S2 thereof is concave. The second lens element E2 has negative refractive power, wherein an object-side surface S3 thereof is convex, and an image-side surface S4 thereof is concave. The third lens element E3 has positive refractive power, wherein an object-side surface S5 thereof is convex, and an image-side surface S6 thereof is convex. The fourth lens element E4 has negative refractive power, wherein an object-side surface S7 thereof is concave, and an image-side surface S8 thereof is concave. The fifth lens element E5 has positive refractive power, wherein an object-side surface S9 thereof is convex, and an image-side surface S10 thereof is concave. The sixth lens element E6 has negative refractive power, wherein an object-side surface S11 thereof is convex and an image-side surface S12 thereof is concave. The filter E7 has an object side surface S13 and an image side surface S14. Light from the object sequentially passes through the respective surfaces S1 to S14 and is finally imaged on the imaging surface S15.
In this example, the total effective focal length f of the optical imaging lens is 4.70mm, the total length TTL of the optical imaging lens is 5.32mm, and half of the diagonal length ImgH of the effective pixel region on the imaging surface S15 of the optical imaging lens is 4.13mm.
Table 11 shows a basic parameter table of the optical imaging lens of embodiment 6, in which the units of radius of curvature, thickness/distance, and focal length are all millimeters (mm). Table 12 shows the higher order coefficients that can be used for each of the aspherical mirror surfaces in example 6, wherein each of the aspherical surface types can be defined by the formula (1) given in example 1 above.
TABLE 11
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 | A18 | A20 |
| S1 | -2.8582E-03 | 7.6463E-03 | -1.6213E-02 | 2.8083E-04 | 5.3848E-02 | -1.0146E-01 | 8.5189E-02 | -3.5150E-02 | 5.5660E-03 |
| S2 | -2.9583E-02 | 2.1494E-02 | -7.7206E-02 | 2.8072E-01 | -5.7708E-01 | 6.8144E-01 | -4.7293E-01 | 1.7958E-01 | -2.8793E-02 |
| S3 | -8.0874E-02 | 1.2032E-01 | -2.0806E-01 | 6.9983E-01 | -1.5311E+00 | 1.9755E+00 | -1.4924E+00 | 6.1621E-01 | -1.0705E-01 |
| S4 | -4.0107E-02 | 1.1603E-01 | 3.6342E-02 | -8.3884E-01 | 3.6934E+00 | -8.3590E+00 | 1.0529E+01 | -6.9943E+00 | 1.9282E+00 |
| S5 | -8.2345E-02 | -5.4298E-02 | 6.4871E-01 | -3.4827E+00 | 1.0240E+01 | -1.8020E+01 | 1.8832E+01 | -1.0807E+01 | 2.6323E+00 |
| S6 | -7.6548E-02 | 4.0966E-02 | -2.6614E-01 | 9.9339E-01 | -2.2202E+00 | 2.9250E+00 | -2.2441E+00 | 9.2283E-01 | -1.5495E-01 |
| S7 | -7.9074E-02 | -2.1229E-01 | 6.8047E-01 | -1.1781E+00 | 1.3404E+00 | -1.0349E+00 | 5.2711E-01 | -1.6117E-01 | 2.2209E-02 |
| S8 | -4.0189E-02 | -2.7720E-01 | 5.9361E-01 | -7.0688E-01 | 5.3678E-01 | -2.5530E-01 | 7.3022E-02 | -1.1474E-02 | 7.6138E-04 |
| S9 | 1.0379E-01 | -2.4538E-01 | 2.6200E-01 | -2.0129E-01 | 9.8784E-02 | -2.9545E-02 | 5.2364E-03 | -5.0722E-04 | 2.0741E-05 |
| S10 | -8.9030E-02 | 1.0696E-01 | -8.7939E-02 | 4.1550E-02 | -1.2909E-02 | 2.7452E-03 | -3.8557E-04 | 3.1828E-05 | -1.1482E-06 |
| S11 | -4.1339E-01 | 2.3469E-01 | -8.4406E-02 | 2.0037E-02 | -3.1438E-03 | 3.2307E-04 | -2.1004E-05 | 7.8815E-07 | -1.3089E-08 |
| S12 | -2.7623E-01 | 1.4192E-01 | -5.7649E-02 | 1.6319E-02 | -3.0799E-03 | 3.7536E-04 | -2.8203E-05 | 1.1857E-06 | -2.1348E-08 |
Table 12
Fig. 12A shows an on-axis chromatic aberration curve of the optical imaging lens of embodiment 6, which indicates the focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve of the optical imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 12C shows a distortion curve of the optical imaging lens of embodiment 6, which represents distortion magnitude values corresponding to different image heights. Fig. 12D shows a magnification chromatic aberration curve of the optical imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the lens. As can be seen from fig. 12A to 12D, the optical imaging lens provided in embodiment 6 can achieve good imaging quality.
In summary, examples 1 to 6 satisfy the relationships shown in table 13, respectively.
| Conditional\embodiment | 1 | 2 | 3 | 4 | 5 | 6 |
| f/EPD | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 | 1.89 |
| TTL/ImgH | 1.40 | 1.40 | 1.29 | 1.28 | 1.25 | 1.29 |
| f1/f2 | -0.28 | -0.28 | -0.29 | -0.28 | -0.31 | -0.33 |
| f4/f | -5.01 | -5.01 | -3.99 | -5.01 | -3.35 | -4.15 |
| ΣAT/TD | 0.24 | 0.24 | 0.25 | 0.24 | 0.25 | 0.28 |
| CT3/CT4 | 1.02 | 1.05 | 1.25 | 1.03 | 1.13 | 1.11 |
| (R11+R12)/(R11-R12) | 7.92 | 7.87 | 7.87 | 7.88 | 7.42 | 8.34 |
| CT6/TTL | 0.14 | 0.14 | 0.16 | 0.15 | 0.15 | 0.13 |
| SAG41/CT4 | -0.55 | -0.56 | -0.66 | -0.56 | -0.67 | -1.05 |
| ET5/ET6 | 1.04 | 1.03 | 1.01 | 1.03 | 0.82 | 0.65 |
| DT51/CT5 | 2.80 | 2.78 | 2.51 | 2.80 | 3.07 | 3.67 |
| R1/f | 0.38 | 0.38 | 0.39 | 0.38 | 0.37 | 0.34 |
| R10/f | 2.79 | 2.74 | 2.70 | 2.73 | 2.79 | 2.41 |
| f3/f6 | -0.53 | -0.53 | -0.44 | -0.53 | -0.77 | -1.14 |
TABLE 13
The application also provides an imaging device, wherein the electronic photosensitive element can be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The imaging device may be a stand alone imaging device such as a digital camera or an imaging module integrated on a mobile electronic device such as a cell phone. The imaging device is equipped with the optical imaging lens described above.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.