CN114779443B - Image pickup lens - Google Patents
Image pickup lens Download PDFInfo
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- CN114779443B CN114779443B CN202210490029.7A CN202210490029A CN114779443B CN 114779443 B CN114779443 B CN 114779443B CN 202210490029 A CN202210490029 A CN 202210490029A CN 114779443 B CN114779443 B CN 114779443B
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- 238000003384 imaging method Methods 0.000 claims abstract description 261
- 230000003287 optical effect Effects 0.000 claims abstract description 69
- 238000000926 separation method Methods 0.000 claims description 14
- 210000001747 pupil Anatomy 0.000 claims description 9
- 230000004075 alteration Effects 0.000 description 43
- 201000009310 astigmatism Diseases 0.000 description 17
- 238000010586 diagram Methods 0.000 description 15
- 238000012634 optical imaging Methods 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- 238000001914 filtration Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 230000000295 complement effect Effects 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000035945 sensitivity Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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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
The application discloses an imaging lens. The imaging lens includes: a photosensitive element arranged on an imaging surface of the imaging lens; and five lenses with refractive power including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially disposed from an object side to an image side along an optical axis; the first lens element with refractive power has a concave image-side surface; the second lens has refractive power; the third lens element with refractive power has a convex object-side surface; the fourth lens element with refractive power has a convex image-side surface; the fifth lens element with negative refractive power has a concave image-side surface; and the total effective focal length f of the imaging lens, half of the effective pixel area diagonal length ImgH of the photosensitive element, and the maximum field angle FOV of the imaging lens satisfy the following conditions: imgH/f >0.85; the FOV is >85 °. The application gives consideration to large angle of view, small size and high imaging quality.
Description
Filing and applying for separate cases
The application relates to a division application of Chinese application patent application with the name of 'image pick-up lens' and the application number 201710085671.6, which is submitted on the day of 2017, 02 and 17.
Technical Field
The present application relates to an imaging lens, and more particularly, to a miniaturized wide-angle imaging lens.
Background
In recent years, with the development of technology, portable electronic products are gradually rising, and portable electronic products with a camera function are more favored by people. The photosensitive element of a conventional image pickup lens is typically a CCD (Charge-Coupled Device) or CMOS (Complementary Metal-Oxide Semiconductor, complementary metal oxide semiconductor element). With the improvement of the performances and the reduction of the sizes of the CCD and the COMS elements, higher requirements are put forward for miniaturization and imaging quality improvement of the matched imaging lens.
Therefore, there is a need for an imaging lens with a large angle of view, a small size, and high imaging quality that is applicable to portable electronic products.
Disclosure of Invention
The technical scheme provided by the application at least partially solves the technical problems.
An imaging lens according to an embodiment of the present application includes: a photosensitive element arranged on an imaging surface of the imaging lens; and five lenses with refractive power including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially disposed 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 and a concave image-side surface; the second lens has refractive power; the third lens element with refractive power has a convex object-side surface; the fourth lens element with refractive power has a convex image-side surface; the fifth lens element with negative refractive power has a concave image-side surface; and the total effective focal length f of the imaging lens, half of the effective pixel area diagonal length ImgH of the photosensitive element, and the maximum field angle FOV of the imaging lens satisfy the following conditions: imgH/f >0.85; the FOV is >85 °.
According to an embodiment of the present application, a separation distance T12 of the first lens and the second lens on the optical axis and an on-axis distance TTL from an object side surface of the first lens to an imaging surface of the imaging lens satisfy the following conditions: 0.08< T12/TTL <0.12.
According to an embodiment of the application, the second lens element has negative refractive power.
According to an 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 the following conditions: 4< T12/T23<13.5.
According to an embodiment of the application, the third lens element has positive refractive power, and an image-side surface of the third lens element is convex.
According to one embodiment of the present application, an on-axis distance SAG32 between an intersection of the image side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the first lens and an on-axis distance SAG41 between an intersection of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the first lens satisfy the following conditions: 0.5< SAG32/SAG41<1.
According to one embodiment of the present application, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy the following conditions: -5< f2/f3< -1.8.
According to an embodiment of the present application, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following conditions: i f3/f4 <0.8.
According to an embodiment of the present application, the radius of curvature R6 of the image side surface of the third lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy the following conditions: 1.4< R6/R7<2.1.
According to an embodiment of the present application, the radius of curvature R7 of the object side surface of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy the following conditions: 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 the following conditions: 0.8< CT3/CT5<1.5.
According to one embodiment of the present application, the total effective focal length f and the entrance pupil diameter EPD of the imaging lens satisfy the following conditions: f/EPD is less than or equal to 2.
An imaging lens according to an embodiment of the present application includes: a photosensitive element arranged on an imaging surface of the imaging lens; and five lenses with refractive power including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, which are sequentially disposed 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 and a concave image-side surface; the second lens has refractive power; the third lens element with refractive power has a convex object-side surface; the fourth lens element with refractive power has a convex image-side surface; the fifth lens element with negative refractive power has a concave image-side surface; and a maximum field angle FOV of the imaging lens, 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 the following conditions: FOV >85 °; and 0.8< CT3/CT5<1.5.
According to an 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 the following conditions: 4< T12/T23<13.5.
According to an embodiment of the present application, a separation distance T12 of the first lens and the second lens on the optical axis and an on-axis distance TTL from an object side surface of the first lens to an imaging surface of the imaging lens satisfy the following conditions: 0.08< T12/TTL <0.12.
According to an embodiment of the application, the first lens element has positive refractive power and has a convex object-side surface.
According to an embodiment of the application, the second lens element has negative refractive power.
According to an embodiment of the application, the third lens element has positive refractive power, and an image-side surface of the third lens element is convex.
According to one embodiment of the present application, the effective focal length f2 of the second lens and the effective focal length f3 of the third lens satisfy the following conditions: -5< f2/f3< -1.8.
According to an embodiment of the present application, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens satisfy the following conditions: i f3/f4 <0.8.
According to an embodiment of the present application, the radius of curvature R6 of the image side surface of the third lens and the radius of curvature R7 of the object side surface of the fourth lens satisfy the following conditions: 1.4< R6/R7<2.1.
According to an embodiment of the present application, the radius of curvature R7 of the object side surface of the fourth lens and the radius of curvature R8 of the image side surface of the fourth lens satisfy the following conditions: 0.5< R7/R8<1.3.
According to one embodiment of the present application, an on-axis distance SAG32 between an intersection of the image side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the first lens and an on-axis distance SAG41 between an intersection of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the first lens satisfy the following conditions: 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 the following conditions: 0.8< CT3/CT5<1.5.
According to one embodiment of the present application, the total effective focal length f of the imaging lens, the entrance pupil diameter EPD of the imaging lens, and half of the diagonal length ImgH of the effective pixel region of the photosensitive element satisfy the following conditions: f/EPD is less than or equal to 2; and ImgH/f >0.85.
The application adopts a plurality of (e.g. five) plastic lenses, and by reasonably distributing the focal length and the surface shape of each lens, the application can have at least one of the following advantages:
The angle of view is effectively enlarged;
shortening the total length of the lens;
The wide angle and miniaturization of the lens are ensured;
correcting various aberrations; and
The resolution and 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 detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram showing the 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 magnification chromatic aberration curve of the imaging lens of embodiment 1;
fig. 3 is a schematic diagram showing the structure 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 magnification chromatic aberration curve of the imaging lens of embodiment 2;
fig. 5 is a schematic diagram showing the structure of an image pickup 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 magnification chromatic aberration curve of the imaging lens of embodiment 3;
Fig. 7 is a schematic diagram showing the structure 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 magnification chromatic aberration curve of the imaging lens of embodiment 4;
Fig. 9 is a schematic diagram showing the structure of an image pickup 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 magnification chromatic aberration curve of the imaging lens of embodiment 5;
fig. 11 is a schematic diagram showing the structure 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 magnification chromatic aberration curve of the imaging lens of embodiment 6;
fig. 13 is a schematic diagram showing the structure 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 magnification chromatic aberration curve of the imaging lens of embodiment 7;
fig. 15 is a schematic diagram showing the structure 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 the imaging lens of embodiment 8;
Fig. 16C shows a distortion curve of the imaging lens of embodiment 8;
Fig. 16D shows a magnification chromatic aberration curve of the imaging lens of embodiment 8;
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 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 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.
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, 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. 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 present application, the use of "may" means "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 a table approximation, not as terms of a table level, and are intended to illustrate inherent deviations in measured or calculated values that would be recognized by one 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, 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 application is further described below in connection with specific examples.
The image pickup lens according to an 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 may have positive refractive power and may have a convex object-side surface. The total effective focal length f of the imaging lens and the incident pupil diameter EPD of the imaging lens can satisfy f/EPD less than or equal to 2, for example, 1.875 f/EPD less than or equal to 1.989. This can be advantageous to increase the amount of light passing, making the system have a large aperture advantage, enhancing the imaging effect in dark environments. The total effective focal length f of the imaging lens and half of the ImgH of the diagonal length of the effective pixel region of the photosensitive element can meet the requirement that ImgH/f >0.85, for example, imgH/f is more than or equal to 0.997 and less than or equal to 1.013; wherein the photosensitive device is disposed on the imaging surface. The imaging lens configured according to the relationship can improve the angle of view while ensuring miniaturization, and effectively correct various aberrations such as on-axis chromatic aberration, astigmatism, chromatic aberration of magnification and the like, thereby improving imaging quality.
In an exemplary embodiment, the plurality of subsequent lenses may include a second lens having 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 imaging lens can satisfy 0.08< T12/TTL <0.12, for example, 0.089 is less than or equal to T12/TTL is less than or equal to 0.113. The total length of the lens can be limited in a shorter range by reasonably setting the on-axis distance TTL from the object side surface of the first lens to the imaging surface of the imaging lens, so that the miniaturization of the system is ensured, and the system is convenient to use in a thinner mobile phone lens.
In an exemplary embodiment, the plurality of subsequent lenses may further include a third lens located 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 of the first lens and the second lens on the optical axis and the separation distance T23 of the second lens and the third lens on the optical axis can satisfy 4< T12/T23<13.5, for example, T12 and T23 can further satisfy 4.314.ltoreq.T12/T23.ltoreq. 13.338. By reasonably setting the on-axis spacing distance between the lenses, the imaging lens can be miniaturized, and meanwhile, the advanced aberration and the system sensitivity can be reduced, so that the imaging quality can be 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 reasonably configuring 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 achieved.
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 radius of curvature R6 of the image side of the third lens and the radius of curvature R7 of the object side of the fourth lens can satisfy R6/R7<2.1, for example, 1.453.ltoreq.R6/R7.ltoreq. 2.009. By reasonably configuring 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, the light incidence angle can be ensured to be gentle, and the correction of the overall aberration of the system is facilitated. 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 angle of the main light ray is reduced. The radius of curvature R7 of the object-side surface of the fourth lens element and the radius of curvature R8 of the image-side surface of the fourth lens element may satisfy R7/R8<1.3, e.g., 0.657.ltoreq.R7/R8.ltoreq.1.21.
In addition, the effective focal length f3 of the third lens and the effective focal length f4 of the fourth lens may satisfy |f3/f4| <0.8, for example, f3 and f4 may further satisfy 0.16.ltoreq.f3/f4|.ltoreq.0.68. The on-axis distance SAG32 between the intersection of the third lens image side and the optical axis and the effective radius vertex of the first lens object side and the on-axis distance SAG41 between the intersection of the fourth lens object side and the optical axis and the effective radius vertex of the first lens object side may satisfy 0.5< SAG32/SAG41<1, for example, 0.615.ltoreq.SAG32/SAG 41.ltoreq.0.91.
The fifth lens element with refractive power has a concave image-side surface. In application, the thickness of each lens may be optimized. For example, 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 may satisfy 0.8< CT3/CT5<1.5, for example, 0.926.ltoreq.CT 3/CT 5.ltoreq.1.276. By reasonably configuring 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 angle of view can be increased while ensuring miniaturization, and the wide-angle function can be realized.
In specific application, the maximum field angle FOV of the imaging lens can be set to be FOV >85 degrees, so that the visual angle of the imaging lens is effectively increased by reasonably distributing the focal power and the surface profile 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 embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. Through the focal power, the face type of each lens of rational distribution, epaxial interval etc. between each lens, can effectively increase the perspective of camera lens, guarantee the miniaturization of camera lens and improve the formation of image quality to make camera lens more be favorable to production and processing and applicable portable electronic product. In an embodiment of the present application, at least one of the mirrors of each lens is an aspherical mirror. The aspherical lens is characterized in that: the curvature varies continuously from the center to the periphery of the lens. Unlike a spherical lens having a curvature from the center to the periphery of the lens, an aspherical lens has a better radius of curvature characteristic, has advantages of improving distortion aberration and improving astigmatic aberration, and can make the field of view larger and more realistic. By adopting the aspherical lens, aberration occurring at the time of imaging can be eliminated as much as possible, thereby improving imaging quality.
However, it will be appreciated by those skilled in the art that the number of lenses can be varied to achieve the various results and advantages described below without departing from the scope of the application as claimed. For example, although the description has been made by taking five lenses as an example in the embodiment, the imaging lens is not limited to include five lenses. The camera lens may also include other numbers of lenses, if desired.
Specific examples of the imaging lens applicable to the above-described embodiments 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the imaging lens of example 1.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Material | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | Infinity is provided | ||
| STO | Spherical surface | Infinity is provided | -0.1155 | ||
| S1 | Aspherical surface | 1.4524 | 0.4263 | 1.544/56.11 | -0.1427 |
| S2 | Aspherical surface | 3.4798 | 0.4591 | -2.0087 | |
| S3 | Aspherical surface | -19.3690 | 0.2250 | 1.660/20.37 | -0.5737 |
| S4 | Aspherical surface | 5.2223 | 0.0557 | -92.7187 | |
| S5 | Aspherical surface | -38.8894 | 0.6355 | 1.544/56.11 | 0.0000 |
| S6 | Aspherical surface | -1.4994 | 0.5031 | -3.7865 | |
| S7 | Aspherical surface | -1.0322 | 0.4000 | 1.651/21.52 | -2.4821 |
| S8 | Aspherical surface | -1.0456 | 0.0300 | -4.1268 | |
| S9 | Aspherical surface | 2.1720 | 0.5749 | 1.530/55.80 | -5.8173 |
| S10 | Aspherical surface | 0.9974 | 0.4880 | -4.4000 | |
| S11 | Spherical surface | Infinity is provided | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.5000 | ||
| S13 | Spherical surface | Infinity is provided |
TABLE 1
As can be seen from table 1, the radius of curvature R6 of the image side surface of the third lens element L3 and the radius of curvature R7 of the object side surface of the fourth lens element L4 satisfy r6/r7=1.453. The radius of curvature R7 of the object-side surface of the fourth lens element L4 and the radius of curvature R8 of the image-side surface of the fourth lens element L4 satisfy r7/r8=0.987.
In the embodiment, 5 lenses are taken as an example, and the focal length and the surface 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 imaging quality of the lens are improved. Each aspherical surface profile is defined by the following formula:
Wherein c is the paraxial curvature of the aspherical surface, i.e., the reciprocal of the radius of curvature in table 1, h is the height of any point on the aspherical surface from the main optical axis, k is the conic coefficient, ai is the correction coefficient of the i-th order of the aspherical surface. Table 2 below shows the higher order coefficients A 4、A6、A8、A10、A12 and A 16 that can be used for each of the mirrors S1-S10 in example 1.
TABLE 2
Table 3 shown below gives the effective focal lengths f1 to f5 of the respective lenses of embodiment 1, the total effective focal length f of the imaging lens, and the total length TTL of the imaging lens. The maximum field angle FOV of the imaging lens may be set to fov= 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 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= 1.949. The total effective focal length f of the imaging lens and half of the ImgH of the effective pixel region diagonal length of the photosensitive element satisfy ImgH/f=1.013. The separation distance T12 of 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 imaging surface of the imaging lens satisfy T12/ttl=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. The on-axis distance SAG32 between the intersection point of the image side surface of the third lens element L3 and the optical axis and the vertex of the effective radius of the object side surface of the first lens element L1 and the on-axis distance SAG41 between the intersection point of the object side surface of the fourth lens element L4 and the optical axis and the vertex of the effective radius of the object side surface of the first lens element L1 satisfy SAG 32/sag41=0.615. The center thickness CT3 of the third lens L3 on the optical axis and the center thickness CT5 of the fifth lens L5 on the optical axis satisfy CT 3/ct5=1.105.
Fig. 2A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 1, which indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 2B shows an astigmatism curve of the imaging lens of embodiment 1, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 1, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 2A to 2D, the imaging lens provided in 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 portions similar to embodiment 1 will be omitted for 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the imaging lens of example 2. Table 5 shows the higher order term coefficients for each mirror in example 2. Table 6 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 2, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Material | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | 450.0000 | ||
| STO | Spherical surface | Infinity is provided | -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 | Infinity is provided | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.5037 | ||
| S13 | Spherical surface | Infinity is provided |
TABLE 4 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 indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 4B shows an astigmatism curve of the imaging lens of embodiment 2, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 2, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 4A to 4D, the imaging lens provided in 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and cone coefficients of the respective lenses of the imaging lens of example 3. Table 8 shows the higher order term coefficients for each mirror in example 3. Table 9 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 3, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
TABLE 7
| Face number | 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 indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 6B shows an astigmatism curve of the imaging lens of embodiment 3, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 3, which represents the 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 provided in 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and cone coefficients of the respective lenses of the imaging lens of example 4. Table 11 shows the higher order term coefficients of the mirrors in example 4. Table 12 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 4, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Material | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | Infinity is provided | ||
| STO | Spherical surface | Infinity is provided | -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 | Infinity is provided | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.5902 | ||
| S13 | Spherical surface | Infinity is provided |
Table 10
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 4.2269E-03 | 9.7317E-02 | -1.0502E+00 | 3.5808E+00 | -6.5848E+00 | 5.6428E+00 | -1.7517E+00 |
| S2 | -1.1251E-01 | 1.4711E-01 | -1.3176E+00 | 4.1479E+00 | -7.7379E+00 | 7.4763E+00 | -2.9184E+00 |
| S3 | -3.0376E-01 | 2.4492E-01 | -5.4295E-01 | -5.3702E-01 | 2.8423E+00 | -3.8017E+00 | 1.8726E+00 |
| S4 | -2.3263E-01 | 4.1613E-01 | -6.5534E-01 | 5.2723E-01 | -1.9616E-01 | 1.6599E-02 | 0.0000E+00 |
| S5 | -1.4477E-01 | 1.5792E-01 | 2.1738E-02 | -1.8599E-01 | 1.8275E-01 | -7.4195E-02 | 1.0924E-02 |
| S6 | -3.4404E-01 | 4.6531E-01 | -7.0694E-01 | 1.2472E+00 | -1.2322E+00 | 5.7563E-01 | -9.9519E-02 |
| S7 | -1.8666E-01 | -3.0455E-03 | 8.1767E-01 | -1.1470E+00 | 7.0556E-01 | -2.1614E-01 | 2.7119E-02 |
| S8 | -2.2021E-01 | 2.5338E-01 | -7.1419E-02 | -8.5749E-02 | 9.1388E-02 | -3.2202E-02 | 3.9034E-03 |
| S9 | -1.6674E-01 | 8.3012E-02 | -4.6571E-02 | 1.7842E-02 | -3.6841E-03 | 3.7843E-04 | -1.5542E-05 |
| S10 | -1.0818E-01 | 4.6341E-02 | -1.6491E-02 | 4.1359E-03 | -6.8642E-04 | 6.6209E-05 | -2.7805E-06 |
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 indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 8B shows an astigmatism curve of the imaging lens of embodiment 4, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 4, which represents the 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 provided in 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and cone coefficients of the respective lenses of the imaging lens of example 4. Table 14 shows the higher order term coefficients for each mirror in example 4. Table 15 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 4, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Material | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | Infinity is provided | ||
| STO | Spherical surface | Infinity is provided | -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 | Infinity is provided | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.4876 | ||
| S13 | Spherical surface | Infinity is provided |
TABLE 13
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 |
TABLE 15
Fig. 10A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 5, which indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 10B shows an astigmatism curve of the imaging lens of embodiment 5, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 5, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 10A to 10D, the imaging lens provided in 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the imaging lens of example 6. Table 17 shows the higher order term coefficients for each mirror in example 6. Table 18 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 6, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
Table 16
| Face number | 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 |
TABLE 18
Fig. 12A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 6, which indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 12B shows an astigmatism curve of the imaging lens of embodiment 6, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 6, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 12A to 12D, the imaging lens provided in 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 shows a schematic configuration diagram of an imaging lens according to embodiment 7 of the present application.
As shown in fig. 13, the imaging lens includes five lenses L1 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. 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 types, radii of curvature, thicknesses, materials, and cone coefficients of the respective lenses of the imaging lens of example 7. Table 20 shows the higher order term coefficients for each mirror in example 7. Table 21 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 7, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
| Face number | Surface type | Radius of curvature | Thickness of (L) | Material | Coefficient of taper |
| OBJ | Spherical surface | Infinity is provided | Infinity is provided | ||
| STO | Spherical surface | Infinity is provided | -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 | Infinity is provided | 0.2100 | 1.517/64.17 | |
| S12 | Spherical surface | Infinity is provided | 0.5269 | ||
| S13 | Spherical surface | Infinity is provided |
TABLE 19
| Face number | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | 2.7527E-02 | 9.7773E-02 | -5.5492E-01 | 2.0161E+00 | -4.1168E+00 | 4.4369E+00 | -2.0506E+00 |
| S2 | 2.5412E-02 | -3.6274E-02 | 3.3453E-02 | -4.2757E-01 | 1.0745E+00 | -1.5606E+00 | 6.6161E-01 |
| S3 | -2.8958E-01 | 1.2353E-01 | -1.1480E+00 | 3.9908E+00 | -8.5219E+00 | 9.0177E+00 | -3.9900E+00 |
| S4 | -1.9486E-01 | 2.0781E-02 | 9.0501E-02 | 7.4576E-02 | -2.5787E-01 | 1.5579E-01 | 0.0000E+00 |
| S5 | -1.1361E-01 | -1.3947E-02 | 2.2031E-01 | -1.9205E-01 | 5.4571E-02 | 8.3916E-03 | -5.5939E-03 |
| S6 | -2.2884E-01 | 1.9671E-01 | -2.4984E-01 | 3.8237E-01 | -2.9672E-01 | 1.1549E-01 | -1.8411E-02 |
| S7 | -2.5387E-02 | -3.8742E-01 | 7.8314E-01 | -5.3167E-01 | 1.3642E-01 | 2.5115E-03 | -4.9758E-03 |
| S8 | -1.3055E-01 | 2.9866E-02 | 6.9327E-02 | -4.3854E-02 | 1.3464E-02 | -2.9556E-03 | 3.3452E-04 |
| S9 | -2.1592E-01 | 8.1157E-02 | -2.5205E-02 | 9.4222E-03 | -2.3787E-03 | 3.0377E-04 | -1.5180E-05 |
| S10 | -1.0364E-01 | 4.3420E-02 | -1.3723E-02 | 2.9468E-03 | -4.1660E-04 | 3.4866E-05 | -1.2800E-06 |
Table 20
| 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 an on-axis chromatic aberration curve of the imaging lens of embodiment 7, which indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 14B shows an astigmatism curve of the imaging lens of embodiment 7, which represents meridional image plane curvature and sagittal image plane curvature. 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 magnification chromatic aberration curve of the imaging lens of embodiment 7, which represents the deviation of different image heights on the imaging plane after light passes through the optical imaging system. As can be seen from fig. 14A to 14D, the imaging lens provided in 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 to L5 arranged in order from an object side to an imaging side along an 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 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, an aperture stop may also be provided to adjust the amount of light entering. Light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
Table 22 shows the surface types, radii of curvature, thicknesses, materials, and conic coefficients of the respective lenses of the imaging lens of example 8. Table 23 shows the higher order term coefficients for each mirror in example 8. Table 24 shows the effective focal lengths f1 to f5 of the respective lenses of embodiment 8, the total effective focal length f of the optical imaging system, and the total length TTL of the imaging lens.
Table 22
| Face number | 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 |
Table 24
Fig. 16A shows an on-axis chromatic aberration curve of the imaging lens of embodiment 8, which indicates a convergent focus deviation of light rays of different wavelengths after passing through an optical system. Fig. 16B shows an astigmatism curve of the imaging lens of embodiment 8, which represents meridional image plane curvature and sagittal image plane curvature. Fig. 16C shows a distortion curve of the imaging lens of embodiment 8, which represents distortion magnitude values in the case of different angles of view. Fig. 16D shows a magnification chromatic aberration curve of the imaging lens of embodiment 8, which represents the 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 provided in embodiment 8 can achieve good imaging quality.
In summary, examples 1 to 8 each satisfy the relationship shown in table 25 below.
Table 25
The application also provides an image pickup device, wherein the 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 apparatus such as a digital camera, or may be an imaging module integrated on a mobile electronic apparatus such as a cellular phone. The image pickup apparatus is equipped with the image pickup 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.
Claims (17)
1. An image pickup lens, characterized by comprising:
a photosensitive element arranged on an imaging surface of the imaging lens; and
Five lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens, which are sequentially arranged 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 and a concave image-side surface;
The second lens element with negative refractive power;
The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface;
the fourth lens element with refractive power has a concave object-side surface and a convex image-side surface;
The fifth lens element with negative refractive power has a concave image-side surface;
the number of the lenses with refractive power of the imaging lens is five; and
The total effective focal length f of the imaging lens, half of the diagonal length ImgH of the effective pixel region of the photosensitive element, the maximum field angle FOV of the imaging lens, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, the interval distance T12 of the first lens and the second lens on the optical axis, and the interval distance T23 of the second lens and the third lens on the optical axis satisfy the following conditions:
The ImgH/f is more than 0.85 and less than or equal to 1.004; FOV >85 °; -5< f2/f3< -1.8;1.4< R6/R7<2.1; and 4< T12/T23<13.5.
2. The image pickup lens according to claim 1, wherein a separation distance T12 of the first lens and the second lens on the optical axis and an on-axis distance TTL from an object side surface of the first lens to an imaging surface of the image pickup lens satisfy the following condition:
0.08<T12/TTL<0.12。
3. The imaging lens according to claim 1 or 2, wherein an on-axis distance SAG32 between an intersection of the image side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the first lens and an on-axis distance SAG41 between an intersection of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the first lens satisfy the following conditions:
0.5<SAG32/SAG41<1。
4. The imaging lens according to claim 1 or 2, wherein an effective focal length f3 of the third lens and an effective focal length f4 of the fourth lens satisfy the following conditions:
0.16≤|f3/f4|<0.8。
5. The imaging lens according to claim 1 or 2, wherein a radius of curvature R7 of an object side surface of the fourth lens and a radius of curvature R8 of an image side surface of the fourth lens satisfy the following conditions:
0.5<R7/R8<1.3。
6. the imaging lens according to claim 1 or 2, wherein 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 the following conditions:
0.8<CT3/CT5<1.5。
7. the imaging lens according to claim 1 or 2, wherein the total effective focal length f and an entrance pupil diameter EPD of the imaging lens satisfy the following condition:
f/EPD≤2。
8. The imaging lens according to claim 7, wherein the total effective focal length f and an entrance pupil diameter EPD of the imaging lens satisfy the following condition:
1.875≤f/EPD≤2。
9. the imaging lens according to claim 1 or 2, wherein a maximum field angle FOV of the imaging lens satisfies the following condition:
85°<FOV≤91.293°。
10. An image pickup lens, characterized by comprising:
Five lenses with refractive power, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens, which are sequentially arranged 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 and a concave image-side surface;
The second lens element with negative refractive power;
The third lens element with positive refractive power has a convex object-side surface and a convex image-side surface;
the fourth lens element with refractive power has a concave object-side surface and a convex image-side surface;
The fifth lens element with negative refractive power has a concave image-side surface;
the number of the lenses with refractive power of the imaging lens is five; and
The maximum field angle FOV of the imaging lens, the center thickness CT3 of the third lens on the optical axis, the center thickness CT5 of the fifth lens on the optical axis, the effective focal length f2 of the second lens, the effective focal length f3 of the third lens, the radius of curvature R6 of the image side surface of the third lens, the radius of curvature R7 of the object side surface of the fourth lens, the distance T12 between the first lens and the second lens on the optical axis, and the distance T23 between the second lens and the third lens on the optical axis satisfy the following conditions:
FOV >85 °;0.8< CT3/CT5<1.5; -5< f2/f3< -1.8;1.4< R6/R7<2.1; and 4< T12/T23<13.5.
11. The imaging lens according to claim 10, wherein a separation distance T12 of the first lens and the second lens on the optical axis and an on-axis distance TTL from an object side surface of the first lens to an imaging surface of the imaging lens satisfy the following condition:
0.08<T12/TTL<0.12。
12. the imaging lens according to claim 10, wherein an effective focal length f3 of the third lens and an effective focal length f4 of the fourth lens satisfy the following conditions:
0.16≤|f3/f4|<0.8。
13. The imaging lens according to claim 12, wherein a radius of curvature R7 of an object side surface of the fourth lens and a radius of curvature R8 of an image side surface of the fourth lens satisfy the following conditions:
0.5<R7/R8<1.3。
14. The imaging lens according to claim 12, wherein an on-axis distance SAG32 between an intersection of the image side surface of the third lens and the optical axis and an effective radius vertex of the object side surface of the first lens and an on-axis distance SAG41 between an intersection of the object side surface of the fourth lens and the optical axis and an effective radius vertex of the object side surface of the first lens satisfy the following condition:
0.5<SAG32/SAG41<1。
15. The imaging lens as claimed in any one of claims 10 to 14, wherein a total effective focal length f of the imaging lens, an entrance pupil diameter EPD of the imaging lens, and a half of a diagonal length ImgH of an effective pixel region of a photosensitive element satisfy the following conditions:
f/EPD is less than or equal to 2; and
0.85<ImgH/f≤1.004。
16. The imaging lens according to claim 15, wherein a total effective focal length f of the imaging lens and an entrance pupil diameter EPD of the imaging lens satisfy the following conditions:
1.875≤f/EPD≤2。
17. The imaging lens according to any one of claims 10 to 14, wherein a maximum field angle FOV of the imaging lens satisfies the following condition:
85°<FOV≤91.293°。
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| 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 |
| US11372208B2 (en) | 2017-05-27 | 2022-06-28 | Zhejiang Sunny Optical Co., Ltd | Imaging lens assembly |
| CN113031218A (en) * | 2017-07-23 | 2021-06-25 | 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 |
| CN114615400A (en) | 2019-01-03 | 2022-06-10 | 核心光电有限公司 | Camera, double camera and triple camera |
| US11656538B2 (en) | 2019-11-25 | 2023-05-23 | Corephotonics Ltd. | Folded zoom camera module with adaptive aperture |
| 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 |
| CN117572549A (en) | 2020-05-30 | 2024-02-20 | 核心光电有限公司 | System and method for obtaining ultra-macro images |
| US11966147B2 (en) | 2020-09-18 | 2024-04-23 | Corephotonics Ltd. | Pop-out zoom camera |
| WO2022118176A1 (en) | 2020-12-01 | 2022-06-09 | Corephotonics Ltd. | Folded camera with continuously adaptive zoom factor |
| 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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