CN106680974B - Camera lens - Google Patents
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- CN106680974B CN106680974B CN201710085671.6A CN201710085671A CN106680974B CN 106680974 B CN106680974 B CN 106680974B CN 201710085671 A CN201710085671 A CN 201710085671A CN 106680974 B CN106680974 B CN 106680974B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
- G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
- G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
- G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
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Abstract
An image pickup lens is provided, which includes a first lens element and a plurality of subsequent lens elements in order from an object side to an image side along an optical axis, and has a total effective focal length f and an entrance pupil diameter EPD, wherein the image pickup lens further includes a photosensitive element disposed on an image plane, the image pickup lens is characterized in that the first lens element has positive refractive power and an object side surface thereof is a convex surface; and the total effective focal length f, the entrance pupil diameter EPD, and half of the diagonal length ImgH of the effective pixel area of the photosensitive element satisfy: f/EPD is less than or equal to 2; and ImgH/f > 0.85.
Description
Technical Field
The present application relates to a camera lens, and more particularly to a miniaturized wide-angle camera lens.
Background
In recent years, with the development of science and technology, portable electronic products have been gradually developed, and portable electronic products having an image capturing function are more favored. The photosensitive element of the conventional camera lens is typically a CCD (Charge-Coupled Device) or a CMOS (Complementary Metal-Oxide Semiconductor). With the improvement of the performance and the reduction of the size of the CCD and cmos elements, higher requirements are put on the miniaturization and the image quality improvement of the image pickup lens of the mating set.
Therefore, there is a need for an image pickup lens having a large angle of view, a small size, and high image quality, which is applicable to portable electronic products.
Disclosure of Invention
The technical solution provided by the present application at least partially solves the technical problems described above.
In one aspect, the present application provides a camera lens. The image pickup lens sequentially comprises a first lens and a plurality of subsequent lenses from an object side to an image side along an optical axis, and has a total effective focal length f and an entrance pupil diameter EPD, wherein the image pickup lens further comprises a photosensitive element arranged on an imaging surface, the first lens has positive refractive power, and the object side surface of the first lens is a convex surface; and the total effective focal length f, the entrance pupil diameter EPD, and half of the diagonal length ImgH of the effective pixel area of the photosensitive element satisfy: f/EPD is less than or equal to 2; and ImgH/f > 0.85. The camera lens can achieve the effects of large aperture and ultrathin and has high imaging quality.
According to an embodiment of the application, the plurality of subsequent lenses comprises: and a second lens element with negative refractive power, wherein a distance T12 between the first and second lens elements on the optical axis and an on-axis distance TTL from an object-side surface of the first lens element to an image plane of the imaging lens system satisfy 0.08< T12/TTL < 0.12.
According to an embodiment of the present disclosure, the plurality of subsequent lenses further includes a third lens element disposed between the second lens element and the image side surface, wherein the third lens element has positive refractive power and a convex image side surface; and wherein a separation distance T12 of the first and second lenses on the optical axis and a separation distance T23 of the second and third lenses on the optical axis satisfy 4< T12/T23< 13.5.
According to an embodiment of the present application, the plurality of subsequent lenses further includes a fourth lens and a fifth lens between the third lens and the image side, wherein an object side surface of the fourth lens is a concave surface and an image side surface of the fifth lens is a concave surface.
According to the embodiment of the present application, an on-axis distance SAG32 between an intersection point of the third lens image-side surface and the optical axis to an effective radius vertex of the first lens object-side surface and an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis to an effective radius vertex of the first lens object-side surface satisfy 0.5< SAG32/SAG41 <1.
According to the embodiment of the application, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens meet-5 < f2/f3< -1.8.
According to the embodiment of the application, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy | f3/f4| < 0.8.
According to the embodiment of the application, the curvature radius R6 of the image side surface of the third lens and the curvature radius R7 of the object side surface of the fourth lens meet 1.4< R6/R7< 2.1.
According to the embodiment of the application, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens meet 0.5< R7/R8< 1.3.
According to an embodiment of the present application, a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy 0.8< CT3/CT5< 1.5.
In another aspect, the present application provides an imaging lens. The imaging lens comprises a first lens, a second lens, a third lens and a plurality of subsequent lenses which are arranged in sequence from an object side to an image side along an optical axis, wherein a separation distance T12 between the first lens and the second lens on the optical axis and a separation distance T23 between the second lens and the third lens on the optical axis satisfy 4< T12/T23< 13.5.
According to the embodiment of the present application, an on-axis distance from an object side surface of the first lens to an imaging surface of the imaging lens is TTL, and a distance T12 between the first lens and the second lens on the optical axis satisfies 0.08< T12/TTL < 0.12.
According to an embodiment of the present disclosure, the first lens element has positive refractive power and has a convex object-side surface.
According to an embodiment of the present application, the second lens element is disposed on an image side of the first lens element and has a negative refractive power.
According to an embodiment of the present application, the third lens element is disposed on an image-forming side of the second lens element, the third lens element having positive refractive power and a convex image-side surface.
According to the embodiment of the present application, the imaging lens further includes a fourth lens on the image forming side of the third lens, the object side surface of the fourth lens being a concave surface, wherein an effective focal length f3 of the third lens and an effective focal length f4 of the fourth lens satisfy | f3/f4| < 0.8.
According to an embodiment of the present invention, the imaging lens further includes a fifth lens element on an image forming side of the fourth lens element, an image side surface of the fifth lens element is a concave surface, and a central thickness CT3 of the third lens element on the optical axis and a central thickness CT5 of the fifth lens element on the optical axis satisfy 0.8< CT3/CT5< 1.5.
According to the embodiment of the application, the total effective focal length f, the entrance pupil diameter EPD and the half ImgH of the diagonal length of the effective pixel area of the photosensitive element of the imaging lens satisfy the following conditions: f/EPD is less than or equal to 2; and ImgH/f > 0.85.
In another aspect, the present application provides an imaging lens. The imaging lens sequentially comprises from an object side to an image side along an optical axis: a first lens element with positive refractive power having a convex object-side surface; a second lens element with negative refractive power; a third lens element with positive refractive power having a convex image-side surface; a fourth lens element with refractive power having a concave object-side surface; the fifth lens element with refractive power has a concave image-side surface; wherein a separation distance T12 of the first lens and the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy 4< T12/T23< 13.5.
According to an embodiment of the present application, the imaging lens further includes: a photosensitive element disposed on an imaging surface, wherein a total effective focal length f of the imaging lens, an entrance pupil diameter EPD of the imaging lens, and a half ImgH of a diagonal length of an effective pixel area of the photosensitive element satisfy: f/EPD is less than or equal to 2; and ImgH/f > 0.85.
In another aspect, the present application provides an imaging lens. The imaging lens comprises a first lens, a second lens, a third lens, a fourth lens and at least one subsequent lens which are sequentially arranged from an object side to an image side along an optical axis. An on-axis distance SAG32 between an intersection point of the third lens image-side surface and the optical axis to an effective radius vertex of the first lens object-side surface and an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis to an effective radius vertex of the first lens object-side surface satisfy 0.5< SAG32/SAG41 <1.
According to the embodiment of the application, the distance T12 between the first lens and the second lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the camera lens on the axis satisfy 0.08< T12/TTL < 0.12.
According to the embodiment of the application, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens meet-5 < f2/f3< -1.8.
According to the embodiment of the present application, a separation distance T12 of the first lens and the second lens on the optical axis and a separation distance T23 of the second lens and the third lens on the optical axis satisfy 4< T12/T23< 13.5.
According to the embodiment of the application, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy | f3/f4| < 0.8.
According to the embodiment of the application, the curvature radius R6 of the image side surface of the third lens and the curvature radius R7 of the object side surface of the fourth lens meet 1.4< R6/R7< 2.1.
According to the embodiment of the application, the curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the image side surface of the fourth lens meet 0.5< R7/R8< 1.3.
According to the embodiment of the present application, an on-axis distance SAG32 between an intersection point of the third lens image-side surface and the optical axis to an effective radius vertex of the first lens object-side surface and an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis to an effective radius vertex of the first lens object-side surface satisfy 0.5< SAG32/SAG41 <1.
According to an embodiment of the present application, a center thickness CT3 of the third lens on the optical axis and a center thickness CT5 of the fifth lens on the optical axis satisfy 0.8< CT3/CT5< 1.5.
According to the embodiment of the present application, the maximum field angle FOV of the imaging lens satisfies FOV >85 °.
The present application employs multiple (e.g., five) plastic lenses, which can have at least one of the following advantages by properly distributing the focal length and the face type of each lens:
the field angle is effectively enlarged;
the total length of the lens is shortened;
the wide angle and miniaturization of the lens are ensured;
various aberrations are corrected; and
the resolution and the imaging quality of the lens are improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic view showing a configuration of an imaging lens according to embodiment 1 of the present application;
fig. 2A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 1;
fig. 2B shows an astigmatism curve of the imaging lens of embodiment 1;
fig. 2C shows a distortion curve of the imaging lens of embodiment 1;
fig. 2D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 1;
fig. 3 is a schematic view showing a configuration of an imaging lens according to embodiment 2 of the present application;
fig. 4A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 2;
fig. 4B shows an astigmatism curve of the imaging lens of embodiment 2;
fig. 4C shows a distortion curve of the imaging lens of embodiment 2;
fig. 4D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 2;
fig. 5 is a schematic view showing a configuration of an imaging lens according to embodiment 3 of the present application;
fig. 6A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 3;
fig. 6B shows an astigmatism curve of the imaging lens of embodiment 3;
fig. 6C shows a distortion curve of the imaging lens of embodiment 3;
fig. 6D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 3;
fig. 7 is a schematic diagram showing a configuration of an imaging lens according to embodiment 4 of the present application;
fig. 8A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 4;
fig. 8B shows an astigmatism curve of the imaging lens of embodiment 4;
fig. 8C shows a distortion curve of the imaging lens of embodiment 4;
fig. 8D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 4;
fig. 9 is a schematic view showing a configuration of an imaging lens according to embodiment 5 of the present application;
fig. 10A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 5;
fig. 10B shows an astigmatism curve of the imaging lens of embodiment 5;
fig. 10C shows a distortion curve of the imaging lens of embodiment 5;
fig. 10D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 5;
fig. 11 is a schematic view showing a configuration of an imaging lens according to embodiment 6 of the present application;
fig. 12A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 6;
fig. 12B shows an astigmatism curve of the imaging lens of embodiment 6;
fig. 12C shows a distortion curve of the imaging lens of embodiment 6;
fig. 12D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 6;
fig. 13 is a schematic view showing a configuration of an imaging lens according to embodiment 7 of the present application;
fig. 14A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 7;
fig. 14B shows an astigmatism curve of the imaging lens of embodiment 7;
fig. 14C shows a distortion curve of the imaging lens of embodiment 7;
fig. 14D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 7;
fig. 15 is a schematic view showing a configuration of an imaging lens according to embodiment 8 of the present application;
fig. 16A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 8;
fig. 16B shows an astigmatism curve of an imaging lens of embodiment 8;
fig. 16C shows a distortion curve of the imaging lens of embodiment 8;
fig. 16D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 8;
Detailed Description
For a better understanding of the present application, various aspects of the present 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 present application and does not limit the scope of the present 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 will be understood that, although the terms first, second, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.
In the drawings, the thickness, size, and shape of the lens have been slightly exaggerated for convenience of explanation. In particular, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shape of the spherical surface or the aspherical surface is not limited to the shape of the spherical surface or the aspherical surface shown in the drawings. The figures are purely diagrammatic and not drawn to scale.
It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.
As used herein, the terms "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.
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 the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The present application is further described below with reference to specific examples.
The imaging lens according to the exemplary embodiment of the present application has a total effective focal length f and an entrance pupil diameter EPD, and may include a first lens, a plurality of subsequent lenses, and a photosensitive element arranged in order from an object side to an image side along an optical axis.
In an exemplary embodiment, the first lens element can have positive refractive power and the object-side surface can be convex. f/EPD is less than or equal to 2, for example, 1.875 less than or equal to f/EPD is less than or equal to 1.989. The light flux can be increased, so that the system has the advantage of large aperture and the imaging effect in a dark environment is enhanced. The total effective focal length f of the camera lens and the half of the diagonal length ImgH of the effective pixel area of the photosensitive element can satisfy that ImgH/f is greater than 0.85, for example, the ImgH/f is greater than or equal to 0.997 and less than or equal to 1.013; wherein the photosensitive device is disposed on the image forming surface. The imaging lens configured according to the above relation can improve the field angle while ensuring miniaturization, and effectively correct various aberrations such as axial chromatic aberration, astigmatism, and chromatic aberration of magnification, thereby improving the imaging quality.
In an exemplary embodiment, the plurality of subsequent lenses may include a second lens having a negative refractive power. The distance T12 between the first lens and the second lens on the optical axis and the distance TTL between the object side surface of the first lens and the imaging surface of the camera lens can satisfy 0.08< T12/TTL <0.12, for example, 0.089 < T12/TTL < 0.113. Through the reasonable axial distance TTL from the object side surface of the first lens to the imaging surface of the camera lens, the total lens length can be constrained within a short range, and the miniaturization of the system is ensured, so that the system can be used in a thin mobile phone lens.
In an exemplary embodiment, the plurality of subsequent lenses may further include a third lens positioned between the second lens and the image side. The third lens element with positive refractive power has a convex image-side surface. In practice, the on-axis separation distance between the lenses can also be optimized. For example, the separation distance T12 on the optical axis of the first lens and the second lens and the separation distance T23 on the optical axis of the second lens and the third lens may satisfy 4< T12/T23<13.5, and for example, T12 and T23 may further satisfy 4.314 ≦ T12/T23 ≦ 13.338. By reasonably setting the on-axis spacing distance between the lenses, the miniaturization of the camera lens can be ensured, and simultaneously, the high-grade aberration and the system sensitivity are reduced, so that the imaging quality is improved.
The effective focal length f2 of the second lens and the effective focal length f3 of the third lens can satisfy-5 < f2/f3< -1.8, for example, f2 and f3 further satisfy-4.505 ≦ f2/f3 ≦ -2.166. By appropriately configuring the parameters of the effective focal length f2 of the second lens and the effective focal length f3 of the third lens, a wide-angle function can be realized.
In an exemplary embodiment, the plurality of subsequent lenses may further include a fourth lens and a fifth lens between the third lens and the image side. The fourth lens element with refractive power has a concave object-side surface. The curvature radius R6 of the image side surface of the third lens and the curvature radius R7 of the object side surface of the fourth lens can satisfy 1.4< R6/R7<2.1, for example, 1.453 ≦ R6/R7 ≦ 2.009. The curvature radius R6 of the image side surface of the third lens and the curvature radius R7 of the object side surface of the fourth lens are reasonably configured, so that the light incidence angle is gentle, and the whole aberration of the system can be corrected. In addition, the spherical aberration of the fourth lens can be corrected by reasonably setting the curvature radius R7 of the object-side surface of the fourth lens and the curvature radius R8 of the image-side surface of the fourth lens, so that the imaging quality of the imaging lens is ensured, and the chief ray angle is reduced. The curvature radius R7 of the object side surface of the fourth lens and the curvature radius R8 of the fourth lens mirror image side surface can satisfy 0.5< R7/R8<1.3, for example, 0.657 ≦ R7/R8 ≦ 1.21.
In addition, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens can satisfy | f3/f4| <0.8, for example, f3 and f4 can further satisfy 0.16 ≦ f3/f4| ≦ 0.68. The on-axis distance between the intersection of the third lens image-side surface and the optical axis to the effective radius vertex of the first lens object-side surface SAG32 and the on-axis distance between the intersection of the fourth lens object-side surface and the optical axis to the effective radius vertex of the first lens object-side surface SAG41 may satisfy 0.5< SAG32/SAG41<1, for example, 0.615 < SAG32/SAG41< 0.91.
The fifth lens element with refractive power has a concave image-side surface. In application, the thickness of each lens can be optimized. For example, the central thickness CT3 of the third lens on the optical axis and the central thickness CT5 of the fifth lens on the optical axis can satisfy 0.8< CT3/CT5<1.5, e.g., 0.926 ≦ CT3/CT5 ≦ 1.276. By properly arranging the center thickness CT3 of the third lens on the optical axis and the center thickness CT5 of the fifth lens on the optical axis, the field angle can be increased while ensuring miniaturization, and a wide-angle function can be realized.
In specific application, the maximum field angle FOV of the camera lens can be set to be FOV >85 degrees, so that the visual angle of the camera lens is effectively increased by reasonably distributing the focal power and the surface type of each lens, and the imaging quality of the lens is improved while the miniaturization of the lens is ensured.
The imaging lens according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. Through the focal power of each lens, the surface type of rational distribution, the on-axis interval between each lens etc., can effectively increase camera lens's visual angle, guarantee the miniaturization of camera lens and improve imaging quality to make camera lens more be favorable to producing and processing and applicable to portable electronic product. In an embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center to the periphery of the lens. Unlike a spherical lens having a certain curvature from the center to the periphery of the lens, an aspherical lens has better curvature radius characteristics, has the advantages of improving distortion aberration and astigmatism aberration, and can make the field of view larger and real. After the aspheric lens is adopted, the aberration generated during imaging can be eliminated as much as possible, thereby improving the imaging quality.
However, it will be appreciated by those skilled in the art that the number of constituent lenses can be varied to achieve the various results and advantages described below without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the imaging lens is not limited to including five lenses. The camera lens may also include other numbers of lenses, if desired.
Specific examples of an imaging lens applicable to the above-described embodiment are further described below with reference to fig. 1 to 16D.
Example 1
An imaging lens according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D.
As shown in fig. 1, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The camera lens may further include a diaphragm (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 1 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 1.
TABLE 1
As can be seen from table 1, the radius of curvature R6 of the image-side surface of the third lens L3 and the radius of curvature R7 of the object-side surface of the fourth lens L4 satisfy R6/R7 of 1.453. The radius of curvature R7 of the object-side surface of the fourth lens L4 and the radius of curvature R8 of the image-side surface of the fourth lens L4 satisfy R7/R8 of 0.987.
In the embodiment, 5 lenses are taken as an example, and the focal length and the surface type of each lens are reasonably distributed, so that the field angle is effectively enlarged, the total length of the lens is shortened, and the wide angle and the miniaturization of the lens are ensured; meanwhile, various aberrations are corrected, and the resolution and the imaging quality of the lens are improved. Each aspheric surface type is defined by the following formula:
wherein c is the paraxial curvature of the aspheric surface, i.e. the reciprocal of the curvature radius in table 1 above, h is the height of any point on the aspheric surface from the main optical axis, k is a conic coefficient, and Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below shows the higher order coefficients A that can be used for each mirror S1-S10 in example 14、A6、A8、A10、A12And A16。
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 1.8679E-02 | 1.0056E-01 | -4.6215E-01 | 1.5705E+00 | -2.9305E+00 | 2.9189E+00 | -1.2095E+00 |
| S2 | 1.8814E-02 | 6.6563E-03 | -1.3866E-01 | 6.3799E-01 | -1.6161E+00 | 1.9588E+00 | -1.0522E+00 |
| S3 | -2.7524E-01 | 1.5688E-01 | -9.3910E-01 | 2.4805E+00 | -5.0280E+00 | 5.8854E+00 | -2.8720E+00 |
| S4 | -1.9156E-01 | 1.3408E-01 | -2.2614E-01 | 2.8242E-01 | -1.9133E-01 | 8.1759E-02 | 0.0000E+00 |
| S5 | -1.4927E-01 | 8.7186E-02 | 1.5979E-01 | -1.7638E-01 | 6.9523E-02 | -1.1875E-02 | 6.8438E-04 |
| S6 | -2.2631E-01 | 1.8548E-01 | -1.6092E-01 | 1.8815E-01 | -7.4117E-02 | 8.3824E-04 | 2.8112E-03 |
| S7 | -1.4250E-01 | 2.0104E-01 | -8.9346E-02 | 1.8051E-02 | -1.8236E-03 | 8.7803E-05 | -1.5970E-06 |
| S8 | -2.2391E-01 | 2.9033E-01 | -2.4854E-01 | 1.5049E-01 | -5.3099E-02 | 9.6306E-03 | -7.0188E-04 |
| S9 | -1.9025E-01 | 8.1256E-02 | -5.9509E-02 | 3.3049E-02 | -9.1068E-03 | 1.2035E-03 | -6.1979E-05 |
| S10 | -8.0745E-02 | 2.7960E-02 | -8.9590E-03 | 2.1194E-03 | -3.4168E-04 | 3.2329E-05 | -1.2967E-06 |
TABLE 2
Table 3 shown below gives effective focal lengths f1 to f5 of the respective lenses, a total effective focal length f of the image pickup lens, and a total length TTL of the image pickup lens of embodiment 1. The maximum field angle FOV of the imaging lens may be set to 91.293 °.
| f1(mm) | 4.25 | f(mm) | 3.35 |
| f2(mm) | -6.15 | TTL(mm) | 4.51 |
| f3(mm) | 2.84 | ||
| f4(mm) | 11.33 | ||
| f5(mm) | -4.14 |
TABLE 3
According to table 3, the effective focal length f2 of the second lens L2 and the effective focal length f3 of the third lens L3 satisfy f2/f3 ═ 2.166. The effective focal length f3 of the third lens L3 and the effective focal length f4 of the fourth lens L4 satisfy | f3/f4| -0.251.
In this embodiment, the total effective focal length f of the imaging lens and the entrance pupil diameter EPD of the imaging lens satisfy f/EPD of 1.949. The total effective focal length f of the camera lens and the half of the diagonal length ImgH of the effective pixel area of the photosensitive element satisfy that ImgH/f is 1.013. The distance T12 between the first lens L1 and the second lens L2 on the optical axis and the on-axis distance TTL from the object side surface of the first lens L1 to the image plane of the imaging lens satisfy T12/TTL as 0.102. The separation distance T12 of the first lens L1 and the second lens L2 on the optical axis and the separation distance T23 of the second lens L2 and the third lens L3 on the optical axis satisfy T12/T23 ═ 8.242. An on-axis distance SAG41 from an intersection point of the object-side surface of the third lens L3 and the optical axis to an effective radius vertex of the object-side surface of the first lens L1 to an on-axis distance SAG32 from an intersection point of the object-side surface of the fourth lens L4 and the optical axis to an effective radius vertex of the object-side surface of the first lens L1 satisfies SAG32/SAG41 of 0.615. The central thickness CT3 of the third lens L3 on the optical axis and the central thickness CT5 of the fifth lens L5 on the optical axis satisfy CT3/CT5 of 1.105.
Fig. 2A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 1, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical system. Fig. 2B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 1. Fig. 2C shows a distortion curve of the imaging lens of embodiment 1, which represents distortion magnitude values in the case of different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 1, which represents a deviation of different image heights on an imaging plane after light passes through an optical imaging system. As can be seen from fig. 2A to 2D, the imaging lens according to embodiment 1 can achieve good imaging quality.
Example 2
An 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 parts similar to those of embodiment 1 will be omitted for the sake of brevity. Fig. 3 shows a schematic configuration diagram of an imaging lens according to embodiment 2 of the present application.
As shown in fig. 3, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The imaging lens may further include a stop (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 4 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 2. Table 5 shows the coefficients of the higher-order terms of the respective mirror surfaces in example 2. Table 6 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging system, and the total length TTL of the image pickup lens of example 2.
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | 450.0000 | ||
| STO | Spherical surface | All-round | -0.1903 | ||
| S1 | Aspherical surface | 1.4818 | 0.4919 | 1.544/56.11 | -0.4322 |
| S2 | Aspherical surface | 3.9925 | 0.4684 | -14.4888 | |
| S3 | Aspherical surface | -38.1621 | 0.2170 | 1.660/20.37 | 16.8791 |
| S4 | Aspherical surface | 11.4955 | 0.1086 | 50.0000 | |
| S5 | Aspherical surface | -7.1556 | 0.6865 | 1.544/56.11 | -99.0000 |
| S6 | Aspherical surface | -1.3544 | 0.1414 | -2.6105 | |
| S7 | Aspherical surface | -0.6935 | 0.2850 | 1.660/20.37 | -4.3421 |
| S8 | Aspherical surface | -1.0563 | 0.0300 | -2.6779 | |
| S9 | Aspherical surface | 1.1658 | 0.7417 | 1.530/55.80 | -7.8808 |
| S10 | Aspherical surface | 1.0086 | 0.6045 | -4.0192 | |
| S11 | Spherical surface | Go to nothing | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | All-round | 0.5037 | ||
| S13 | Spherical surface | All-round |
TABLE 4
| f1(mm) | 4.04 | f(mm) | 3.24 |
| f2(mm) | -13.23 | TTL(mm) | 4.49 |
| f3(mm) | 2.94 | ||
| f4(mm) | -4.42 | ||
| f5(mm) | 21.49 |
TABLE 6
Fig. 4A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 2, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical system. Fig. 4B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 2. Fig. 4C shows a distortion curve of the imaging lens of embodiment 2, which represents distortion magnitude values in the case of different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 2, which represents a deviation of different image heights on the imaging surface after light passes through the optical imaging system. As can be seen from fig. 4A to 4D, the imaging lens according to embodiment 2 can achieve good imaging quality.
Example 3
An 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 imaging lens according to embodiment 3 of the present application.
As shown in fig. 5, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The camera lens may further include a diaphragm (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 7 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 3. Table 8 shows the coefficients of higher-order terms of the respective mirror surfaces in example 3. Table 9 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging system, and the total length TTL of the image pickup lens of example 3.
TABLE 7
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 1.7972E-02 | 1.3497E-01 | -7.1096E-01 | 2.3655E+00 | -4.3527E+00 | 4.1988E+00 | -1.6836E+00 |
| S2 | 2.0397E-02 | 1.3142E-02 | -2.0202E-01 | 6.2775E-01 | -1.3416E+00 | 1.3688E+00 | -6.9304E-01 |
| S3 | -2.8342E-01 | 2.0962E-01 | -1.2221E+00 | 3.4141E+00 | -7.1581E+00 | 8.1191E+00 | -3.8346E+00 |
| S4 | -2.3774E-01 | 1.7539E-01 | -1.8913E-01 | 1.7065E-01 | -1.4401E-01 | 7.9981E-02 | 0.0000E+00 |
| S5 | -1.3434E-01 | -1.6052E-02 | 4.2279E-01 | -5.7686E-01 | 3.8302E-01 | -1.3104E-01 | 1.8357E-02 |
| S6 | -2.1514E-01 | 9.9330E-02 | 1.0286E-01 | -1.5880E-01 | 1.3613E-01 | -5.9766E-02 | 9.7476E-03 |
| S7 | -3.4978E-01 | 8.5966E-01 | -9.8956E-01 | 7.4065E-01 | -3.4634E-01 | 9.1111E-02 | -1.0406E-02 |
| S8 | -2.3211E-01 | 5.1193E-01 | -5.7500E-01 | 3.8356E-01 | -1.4081E-01 | 2.6046E-02 | -1.8964E-03 |
| S9 | 1.0375E-01 | -2.9732E-01 | 2.2418E-01 | -9.6988E-02 | 2.6443E-02 | -4.0880E-03 | 2.6393E-04 |
| S10 | -2.4466E-02 | -1.2267E-02 | 8.8222E-03 | -2.6571E-03 | 4.2419E-04 | -3.5404E-05 | 1.1973E-06 |
TABLE 8
| f1(mm) | 4.33 | f(mm) | 3.34 |
| f2(mm) | -6.80 | TTL(mm) | 4.58 |
| f3(mm) | 2.70 | ||
| f4(mm) | 3.98 | ||
| f5(mm) | -2.10 |
TABLE 9
Fig. 6A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 3, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical system. Fig. 6B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 3. Fig. 6C shows a distortion curve of the imaging lens of embodiment 3, which represents distortion magnitude values in the case of different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 3, which represents a deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 6A to 6D, the imaging lens according to embodiment 3 can achieve good imaging quality.
Example 4
An 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 imaging lens according to embodiment 4 of the present application.
As shown in fig. 7, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The camera lens may further include a diaphragm (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 10 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 4. Table 11 shows the coefficients of higher-order terms of the respective mirror surfaces in example 4. Table 12 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging system, and the total length TTL of the image pickup lens of example 4.
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | ||
| STO | Spherical surface | All-round | -0.0072 | ||
| S1 | Aspherical surface | 2.3369 | 0.4807 | 1.544/56.11 | -4.5739 |
| S2 | Aspherical surface | -12650.7200 | 0.4016 | 99.0000 | |
| S3 | Aspherical surface | -23.1223 | 0.2668 | 1.660/20.37 | 99.0000 |
| S4 | Aspherical surface | 4.3277 | 0.0910 | -42.9179 | |
| S5 | Aspherical surface | 54.0631 | 0.7404 | 1.544/56.11 | -99.0000 |
| S6 | Aspherical surface | -1.2716 | 0.1815 | -2.5289 | |
| S7 | Aspherical surface | -0.6330 | 0.3295 | 1.651/21.52 | -2.4574 |
| S8 | Aspherical surface | -0.8656 | 0.0300 | -3.1776 | |
| S9 | Aspherical surface | 0.9955 | 0.5803 | 1.530/55.80 | -3.0314 |
| S10 | Aspherical surface | 0.8241 | 0.6125 | -2.4451 | |
| S11 | Spherical surface | All-round | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | All-round | 0.5902 | ||
| S13 | Spherical surface | All-round |
TABLE 11
| f1(mm) | 4.28 | f(mm) | 2.84 |
| f2(mm) | -5.45 | TTL(mm) | 4.51 |
| f3(mm) | 2.29 | ||
| f4(mm) | -8.18 | ||
| f5(mm) | 48.84 |
TABLE 12
Fig. 8A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 4, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical system. Fig. 8B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 4. Fig. 8C shows a distortion curve of the imaging lens of embodiment 4, which represents distortion magnitude values in the case of different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 4, which represents a deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 8A to 8D, the imaging lens according to embodiment 4 can achieve good imaging quality.
Example 5
An 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 diagram of an imaging lens according to embodiment 5 of the present application.
As shown in fig. 9, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The camera lens may further include a diaphragm (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 13 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 4. Table 14 shows the coefficients of the high-order terms of the respective mirror surfaces in example 4. Table 15 shows the effective focal lengths f1 to f5 of the respective lenses, the total effective focal length f of the optical imaging system, and the total length TTL of the image pickup lens of example 4.
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | ||
| STO | Spherical surface | All-round | -0.0862 | ||
| S1 | Aspherical surface | 1.5248 | 0.4749 | 1.544/56.11 | -0.4375 |
| S2 | Aspherical surface | 3.7081 | 0.4504 | -12.2830 | |
| S3 | Aspherical surface | 42963.2300 | 0.2500 | 1.660/20.37 | -99.0000 |
| S4 | Aspherical surface | 4.7695 | 0.0740 | -87.0862 | |
| S5 | Aspherical surface | 18.5293 | 0.7868 | 1.544/56.11 | -99.0000 |
| S6 | Aspherical surface | -1.4589 | 0.2673 | -2.7825 | |
| S7 | Aspherical surface | -0.9398 | 0.3572 | 1.651/21.52 | -2.0142 |
| S8 | Aspherical surface | -0.7796 | 0.0613 | -3.3048 | |
| S9 | Aspherical surface | -16.3859 | 0.6949 | 1.530/55.80 | 78.6220 |
| S10 | Aspherical surface | 1.1135 | 0.4756 | -7.5147 | |
| S11 | Spherical surface | All-round | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | All-round | 0.4876 | ||
| S13 | Spherical surface | All-round |
Watch 13
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.5733E-02 | 6.9157E-02 | -4.1017E-01 | 1.5166E+00 | -3.1032E+00 | 3.2881E+00 | -1.4685E+00 |
| S2 | 1.7143E-02 | 3.7699E-02 | -4.5962E-01 | 1.2295E+00 | -2.0821E+00 | 1.6040E+00 | -5.6432E-01 |
| S3 | -3.2485E-01 | 2.9355E-01 | -1.2232E+00 | 1.7780E+00 | -1.5048E+00 | -1.9983E-01 | 8.0027E-01 |
| S4 | -2.3163E-01 | 2.2472E-01 | -4.5854E-01 | 6.1176E-01 | -5.0276E-01 | 2.0566E-01 | 0.0000E+00 |
| S5 | -1.2861E-01 | 1.7909E-02 | 3.2781E-01 | -4.6388E-01 | 3.1213E-01 | -1.0907E-01 | 1.5791E-02 |
| S6 | -2.0317E-01 | 5.6980E-02 | 1.7577E-01 | -2.7106E-01 | 2.4189E-01 | -1.0837E-01 | 1.8104E-02 |
| S7 | -3.7277E-01 | 9.9894E-01 | -1.2852E+00 | 1.0405E+00 | -5.0896E-01 | 1.3720E-01 | -1.5859E-02 |
| S8 | -2.8181E-01 | 6.6126E-01 | -8.0023E-01 | 5.6377E-01 | -2.1972E-01 | 4.3948E-02 | -3.5426E-03 |
| S9 | 1.2974E-01 | -2.9996E-01 | 1.9534E-01 | -6.7570E-02 | 1.4269E-02 | -1.7584E-03 | 9.4550E-05 |
| S10 | -1.0566E-02 | -2.3355E-02 | 1.3626E-02 | -3.9258E-03 | 6.2946E-04 | -5.4021E-05 | 1.9129E-06 |
TABLE 14
| f1(mm) | 4.41 | f(mm) | 3.34 |
| f2(mm) | -7.16 | TTL(mm) | 4.59 |
| f3(mm) | 2.51 | ||
| f4(mm) | 3.70 | ||
| f5(mm) | -1.92 |
Fig. 10A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 5, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical system. Fig. 10B shows astigmatism curves representing meridional field curvature and sagittal field curvature of the imaging lens of embodiment 5. Fig. 10C shows a distortion curve of the imaging lens of embodiment 5, which represents distortion magnitude values in the case of different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 5, which represents a deviation of different image heights on the imaging surface after light passes through the optical imaging system. As can be seen from fig. 10A to 10D, the imaging lens according to embodiment 5 can achieve good imaging quality.
Example 6
An 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 configuration diagram of an imaging lens according to embodiment 6 of the present application.
As shown in fig. 11, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The camera lens may further include a diaphragm (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 16 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 6. Table 17 shows the high-order coefficient of each mirror surface in example 6. Table 18 shows effective focal lengths f1 to f5 of the respective lenses, a total effective focal length f of the optical imaging system, and a total length TTL of the image pickup lens of example 6.
TABLE 16
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.4022E-02 | 8.9762E-02 | -4.9355E-01 | 1.7912E+00 | -3.6208E+00 | 3.8315E+00 | -1.7025E+00 |
| S2 | 2.2207E-02 | 1.3637E-02 | -2.6440E-01 | 7.7884E-01 | -1.5925E+00 | 1.5576E+00 | -7.6372E-01 |
| S3 | -2.7789E-01 | 2.6390E-01 | -1.6677E+00 | 4.9976E+00 | -1.0276E+01 | 1.1195E+01 | -5.0199E+00 |
| S4 | -1.9320E-01 | 1.9174E-01 | -3.9127E-01 | 4.9958E-01 | -3.7878E-01 | 1.4695E-01 | 0.0000E+00 |
| S5 | -1.5243E-01 | 1.2194E-01 | -6.8424E-03 | 1.0447E-01 | -1.8599E-01 | 1.0781E-01 | -2.1662E-02 |
| S6 | -2.2950E-01 | 1.8097E-01 | -1.9020E-01 | 2.7035E-01 | -1.5702E-01 | 3.4467E-02 | -1.8252E-03 |
| S7 | -2.0134E-02 | -3.2476E-01 | 7.6222E-01 | -6.6506E-01 | 2.8864E-01 | -6.1253E-02 | 4.8217E-03 |
| S8 | -1.6893E-01 | 1.2276E-01 | -3.4446E-02 | 1.4362E-02 | -6.3201E-03 | 1.1991E-03 | -7.3847E-05 |
| S9 | -2.3374E-01 | 1.1044E-01 | -5.9028E-02 | 2.8723E-02 | -8.0646E-03 | 1.1473E-03 | -6.5565E-05 |
| S10 | -9.9370E-02 | 4.2132E-02 | -1.3542E-02 | 2.9697E-03 | -4.1863E-04 | 3.3829E-05 | -1.1728E-06 |
TABLE 17
| f1(mm) | 4.49 | f(mm) | 3.27 |
| f2(mm) | -7.40 | TTL(mm) | 4.56 |
| f3(mm) | 2.80 | ||
| f4(mm) | -17.56 | ||
| f5(mm) | -10.84 |
Watch 18
Fig. 12A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 6, which represents the deviation of the convergent focal points of light rays of different wavelengths after passing through the optical system. Fig. 12B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens of embodiment 6. Fig. 12C shows a distortion curve of the imaging lens of embodiment 6, which represents distortion magnitude values in the case of different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 6, which represents a deviation of different image heights on the imaging surface after light passes through the optical imaging system. As can be seen from fig. 12A to 12D, the imaging lens according to embodiment 6 can achieve good imaging quality.
Example 7
An imaging lens according to embodiment 7 of the present application is described below with reference to fig. 13 to 14D. Fig. 13 is a schematic diagram showing a configuration of an imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The camera lens may further include a diaphragm (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 19 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 7. Table 20 shows the coefficients of the higher-order terms of the respective mirror surfaces in example 7. Table 21 shows effective focal lengths f1 to f5 of the respective lenses, a total effective focal length f of the optical imaging system, and a total length TTL of the imaging lens of example 7.
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | Go to nothing | All-round | ||
| STO | Spherical surface | All-round | -0.1293 | ||
| S1 | Aspherical surface | 1.4963 | 0.4552 | 1.544/56.11 | -0.3681 |
| S2 | Aspherical surface | 4.3079 | 0.5175 | -12.9164 | |
| S3 | Aspherical surface | -3.3744 | 0.2500 | 1.660/20.37 | -23.3948 |
| S4 | Aspherical surface | -14.4205 | 0.0388 | -85.8215 | |
| S5 | Aspherical surface | 170.9142 | 0.7837 | 1.544/56.11 | -99.0000 |
| S6 | Aspherical surface | -1.5194 | 0.2018 | -1.7978 | |
| S7 | Aspherical surface | -0.7737 | 0.3244 | 1.651/21.52 | -2.2271 |
| S8 | Aspherical surface | -0.9887 | 0.0300 | -3.1243 | |
| S9 | Aspherical surface | 1.4274 | 0.7150 | 1.530/55.80 | -4.8266 |
| S10 | Aspherical surface | 0.9938 | 0.5149 | -3.3664 | |
| S11 | Spherical surface | All-round | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | All-round | 0.5269 | ||
| S13 | Spherical surface | All-round |
Watch 19
| f1(mm) | 3.97 | f(mm) | 3.17 |
| f2(mm) | -6.67 | TTL(mm) | 4.57 |
| f3(mm) | 2.76 | ||
| f4(mm) | -13.47 | ||
| f5(mm) | -14.37 |
TABLE 21
Fig. 14A shows on-axis chromatic aberration curves of the imaging lens of embodiment 7, which represent deviation of convergence focuses of light rays of different wavelengths after passing through an optical system. Fig. 14B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens of embodiment 7. Fig. 14C shows a distortion curve of the imaging lens of embodiment 7, which represents distortion magnitude values in the case of different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 7, which represents a deviation of different image heights on the imaging surface after light passes through the optical imaging system. As can be seen from fig. 14A to 14D, the imaging lens according to embodiment 7 can achieve good imaging quality.
Example 8
An imaging lens according to embodiment 8 of the present application is described below with reference to fig. 15 to 16D. Fig. 15 shows a schematic configuration diagram of an imaging lens according to embodiment 8 of the present application.
As shown in fig. 15, the imaging lens includes five lenses L1-L5 arranged in order from the object side to the image side along the optical axis. The first lens L1 has an object-side surface S1 and an image-side surface S2; the second lens L2 has an object-side surface S3 and an image-side surface S4; the third lens L3 has an object-side surface S5 and an image-side surface S6; the fourth lens L4 has an object-side surface S7 and an image-side surface S8; the fifth lens L5 has an object side surface S9 and an image side surface S10. The imaging lens may further include a stop (not shown) and a filter L6 having an object side surface S11 and an image side surface S12 for filtering infrared light. In the imaging lens of the present embodiment, a stop STO may be further provided to adjust the amount of light entering. Light from the object passes through the respective surfaces S1 to S12 in sequence and is finally imaged on the imaging surface S13.
Table 22 shows the surface type, radius of curvature, thickness, material, and conic coefficient of each lens of the imaging lens of example 8. Table 23 shows the coefficients of higher-order terms of the respective mirror surfaces in example 8. Table 24 shows effective focal lengths f1 to f5 of the respective lenses, a total effective focal length f of the optical imaging system, and a total length TTL of the photographing lens of example 8.
| Flour mark | Surface type | Radius of curvature | Thickness of | Material | Coefficient of cone |
| OBJ | Spherical surface | All-round | All-round | ||
| STO | Spherical surface | All-round | -0.1896 | ||
| S1 | Aspherical surface | 1.4934 | 0.4536 | 1.544/56.11 | -0.2330 |
| S2 | Aspherical surface | 3.5930 | 0.4726 | -5.3278 | |
| S3 | Aspherical surface | -17.3698 | 0.2500 | 1.660/20.37 | -62.1257 |
| S4 | Aspherical surface | 6.1593 | 0.0705 | -91.2075 | |
| S5 | Aspherical surface | 17.0277 | 0.7434 | 1.544/56.11 | -97.0191 |
| S6 | Aspherical surface | -1.5902 | 0.2613 | -2.6421 | |
| S7 | Aspherical surface | -0.9871 | 0.3502 | 1.651/21.52 | -2.1672 |
| S8 | Aspherical surface | -0.8262 | 0.1035 | -3.2126 | |
| S9 | Aspherical surface | -811.2087 | 0.7010 | 1.530/55.80 | 99.0000 |
| S10 | Aspherical surface | 1.1636 | 0.4760 | -6.6931 | |
| S11 | Spherical surface | All-round | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | All-round | 0.4880 | ||
| S13 | Spherical surface | All-round |
TABLE 22
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 1.8299E-02 | 1.3792E-01 | -7.3596E-01 | 2.4769E+00 | -4.6080E+00 | 4.4909E+00 | -1.8190E+00 |
| S2 | 2.1496E-02 | 2.6435E-03 | -1.3618E-01 | 3.9512E-01 | -8.9273E-01 | 9.1812E-01 | -5.1644E-01 |
| S3 | -2.8248E-01 | 1.9286E-01 | -1.1177E+00 | 3.0941E+00 | -6.6395E+00 | 7.6915E+00 | -3.7012E+00 |
| S4 | -2.3858E-01 | 1.7819E-01 | -1.9475E-01 | 1.7866E-01 | -1.5132E-01 | 8.3179E-02 | 0.0000E+00 |
| S5 | -1.3423E-01 | -1.6098E-02 | 4.2235E-01 | -5.7612E-01 | 3.8245E-01 | -1.3081E-01 | 1.8319E-02 |
| S6 | -2.1496E-01 | 9.8919E-02 | 1.0331E-01 | -1.5866E-01 | 1.3542E-01 | -5.9265E-02 | 9.6401E-03 |
| S7 | -3.5047E-01 | 8.6106E-01 | -9.9125E-01 | 7.4232E-01 | -3.4751E-01 | 9.1567E-02 | -1.0479E-02 |
| S8 | -2.3192E-01 | 5.0796E-01 | -5.6468E-01 | 3.7289E-01 | -1.3551E-01 | 2.4775E-02 | -1.7778E-03 |
| S9 | 9.2642E-02 | -2.8330E-01 | 2.1451E-01 | -9.3009E-02 | 2.5407E-02 | -3.9288E-03 | 2.5325E-04 |
| S10 | -2.4871E-02 | -1.1708E-02 | 8.5463E-03 | -2.5742E-03 | 4.0895E-04 | -3.3882E-05 | 1.1354E-06 |
TABLE 23
| f1(mm) | 4.35 | f(mm) | 3.34 |
| f2(mm) | -6.79 | TTL(mm) | 4.58 |
| f3(mm) | 2.70 | ||
| f4(mm) | 4.15 | ||
| f5(mm) | -2.16 |
Watch 24
Fig. 16A shows a distortion curve of the imaging lens of embodiment 8, which represents the distortion magnitude values in the case of different angles of view. Fig. 16D shows a chromatic aberration of magnification curve of the imaging lens of embodiment 8, which represents a deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 16A to 16D, the imaging lens according to embodiment 8 can achieve good imaging quality.
In summary, examples 1 to 8 each satisfy the relationship shown in table 25 below.
| Conditions/examples | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| f/EPD | 1.949 | 1.875 | 1.953 | 1.989 | 1.985 | 1.972 | 1.934 | 1.952 |
| ImgH/f | 1.013 | 0.998 | 0.997 | 1.000 | 1.004 | 1.001 | 1.002 | 1.001 |
| R6/R7 | 1.453 | 1.953 | 1.604 | 2.009 | 1.552 | 1.919 | 1.964 | 1.611 |
| FOV(°) | 91.293 | 91.293 | 89.463 | 89.998 | 90.031 | 89.992 | 90.104 | 90.005 |
| T12/T23 | 8.242 | 4.314 | 6.682 | 4.413 | 6.086 | 5.655 | 13.338 | 6.704 |
| T12/TTL | 0.102 | 0.104 | 0.103 | 0.089 | 0.098 | 0.101 | 0.113 | 0.103 |
| f2/f3 | -2.166 | -4.505 | -2.515 | -2.383 | -2.849 | -2.638 | -2.414 | -2.514 |
| |f3/f4| | 0.251 | 0.665 | 0.680 | 0.279 | 0.679 | 0.160 | 0.205 | 0.652 |
| R7/R8 | 0.987 | 0.657 | 1.210 | 0.731 | 1.205 | 0.801 | 0.782 | 1.195 |
| SAG32/SAG41 | 0.615 | 0.910 | 0.827 | 0.833 | 0.814 | 0.746 | 0.824 | 0.881 |
| CT3/CT5 | 1.105 | 0.926 | 1.062 | 1.276 | 1.132 | 1.019 | 1.096 | 1.060 |
TABLE 25
The present application also provides an image pickup apparatus, the photosensitive element of which may be a photosensitive coupling element (CCD) or a complementary metal oxide semiconductor element (CMOS). The image pickup apparatus may be a stand-alone image pickup device such as a digital camera, or may be an image pickup module integrated on a mobile electronic device such as a mobile phone. The image pickup apparatus is equipped with the image pickup lens described above.
The foregoing description is only exemplary of the preferred embodiments of this application and is made for the purpose of illustrating the general principles of the technology. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. An imaging lens includes a first lens element, a second lens element, a third lens element, a fourth lens element, and a fifth lens element arranged in order from an object side to an image side along an optical axis,
the first lens element with positive refractive power has a convex object-side surface; the second lens element with negative refractive power; the third lens element with positive refractive power has a convex image-side surface; the fourth lens element with refractive power has a concave object-side surface; the fifth lens element with refractive power has a concave image-side surface;
the number of lenses with refractive power in the camera lens is five;
wherein an on-axis distance SAG32 between an intersection point of the third lens image-side surface and the optical axis to an effective radius vertex of the first lens object-side surface and an on-axis distance SAG41 between an intersection point of the fourth lens object-side surface and the optical axis to an effective radius vertex of the first lens object-side surface satisfy 0.5< SAG32/SAG41 <1.
2. The imaging lens of claim 1, wherein an on-axis distance from an object side surface of the first lens to an imaging surface of the imaging lens is TTL,
wherein a separation distance T12 between the first lens and the second lens on the optical axis satisfies 0.08< T12/TTL < 0.12.
3. The imaging lens of claim 1, wherein an effective focal length f2 of the second lens and an effective focal length f3 of the third lens satisfy-5 < f2/f3< -1.8.
4. The imaging lens according to claim 3, wherein a separation distance T12 on the optical axis between the first lens and the second lens and a separation distance T23 on the optical axis between the second lens and the third lens satisfy 4< T12/T23< 13.5.
5. The imaging lens according to claim 1, wherein an effective focal length f3 of the third lens and an effective focal length f4 of the fourth lens satisfy | f3/f4| < 0.8.
6. The imaging lens of claim 1, wherein a radius of curvature R6 of the image-side surface of the third lens and a radius of curvature R7 of the object-side surface of the fourth lens satisfy 1.4< R6/R7< 2.1.
7. The imaging lens of claim 1, wherein a radius of curvature R7 of the object-side surface of the fourth lens and a radius of curvature R8 of the image-side surface of the fourth lens satisfy 0.5< R7/R8< 1.3.
8. The imaging lens according to claim 1, wherein a central thickness CT3 of the third lens on the optical axis and a central thickness CT5 of the fifth lens on the optical axis satisfy 0.8< CT3/CT5< 1.5.
9. The imaging lens of claim 1, wherein a maximum field angle FOV of the imaging lens satisfies FOV >85 °.
10. The imaging lens according to any one of claims 3 to 9, characterized in that the total effective focal length f, the entrance pupil diameter EPD, and the half ImgH of the diagonal length of the effective pixel area of the photosensitive element of the imaging lens satisfy the following conditions:
f/EPD is less than or equal to 2; and
ImgH/f>0.85。
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| CN108234851B (en) | 2013-06-13 | 2019-08-16 | 核心光电有限公司 | Based on Dual-Aperture zoom digital camera |
| US9857568B2 (en) | 2013-07-04 | 2018-01-02 | Corephotonics Ltd. | Miniature telephoto lens assembly |
| CN108388005A (en) | 2013-07-04 | 2018-08-10 | 核心光电有限公司 | Small-sized focal length lens external member |
| US9392188B2 (en) | 2014-08-10 | 2016-07-12 | Corephotonics Ltd. | Zoom dual-aperture camera with folded lens |
| US11347016B2 (en) | 2017-02-23 | 2022-05-31 | Corephotonics Ltd. | Folded camera lens designs |
| WO2018218856A1 (en) * | 2017-05-27 | 2018-12-06 | 浙江舜宇光学有限公司 | Imaging lens set |
| CN113050253B (en) * | 2017-07-23 | 2023-08-04 | 核心光电有限公司 | Folding camera and folding lens kit thereof |
| CN108681039B (en) * | 2018-08-01 | 2023-06-06 | 浙江舜宇光学有限公司 | Imaging lens |
| CN108802974B (en) * | 2018-09-05 | 2023-05-09 | 浙江舜宇光学有限公司 | Optical image lens assembly |
| JP7252247B2 (en) | 2019-01-03 | 2023-04-04 | コアフォトニクス リミテッド | Multi-aperture camera comprising at least one camera with two zoom states |
| JP2022536204A (en) | 2019-08-21 | 2022-08-12 | コアフォトニクス リミテッド | Small total track length for large sensor formats |
| US11656538B2 (en) | 2019-11-25 | 2023-05-23 | Corephotonics Ltd. | Folded zoom camera module with adaptive aperture |
| KR102688149B1 (en) | 2020-01-08 | 2024-07-23 | 코어포토닉스 리미티드 | Multi-aperture zoom digital cameras and methods of using same |
| TWI750615B (en) | 2020-01-16 | 2021-12-21 | 大立光電股份有限公司 | Image capturing optical lens assembly, imaging apparatus and electronic device |
| WO2021184276A1 (en) * | 2020-03-19 | 2021-09-23 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| WO2021245488A1 (en) | 2020-05-30 | 2021-12-09 | Corephotonics Ltd. | Systems and methods for obtaining a super macro image |
| CN117518405A (en) | 2020-09-18 | 2024-02-06 | 核心光电有限公司 | Camera system and method for compensating for undesired linear movement of a camera system |
| CN114868065A (en) | 2020-12-01 | 2022-08-05 | 核心光电有限公司 | Folding camera with continuously adaptive zoom factor |
| KR102712773B1 (en) | 2021-03-22 | 2024-09-30 | 코어포토닉스 리미티드 | Folded cameras with continuously adaptive zoom factor |
| KR102685591B1 (en) | 2021-09-23 | 2024-07-15 | 코어포토닉스 리미티드 | Large aperture continuous zoom folded telecamera |
| KR102610118B1 (en) | 2021-11-02 | 2023-12-04 | 코어포토닉스 리미티드 | Compact double folded tele camera |
| CN114326026B (en) * | 2021-12-29 | 2023-09-05 | 江西晶超光学有限公司 | Optical lens, camera module and electronic equipment |
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| WO2013175782A1 (en) * | 2012-05-24 | 2013-11-28 | 富士フイルム株式会社 | Image pickup lens, and image pickup apparatus provided with image pickup lens |
| CN103412394B (en) * | 2013-03-19 | 2017-05-10 | 玉晶光电(厦门)有限公司 | Portable electronic device and optical imaging lens thereof |
| CN104914558B (en) * | 2014-03-14 | 2017-09-01 | 光燿科技股份有限公司 | Imaging lens group |
| TWI500958B (en) * | 2014-06-10 | 2015-09-21 | Glory Science Co Ltd | Imaging lens |
| CN105445915B (en) * | 2015-12-31 | 2017-08-11 | 浙江舜宇光学有限公司 | Pick-up lens |
| CN106405796B (en) * | 2016-11-15 | 2019-08-09 | 浙江舜宇光学有限公司 | Optical imaging system and photographic device |
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