CN211669431U - Image pickup lens group - Google Patents
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- CN211669431U CN211669431U CN202020190552.4U CN202020190552U CN211669431U CN 211669431 U CN211669431 U CN 211669431U CN 202020190552 U CN202020190552 U CN 202020190552U CN 211669431 U CN211669431 U CN 211669431U
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Abstract
The application discloses a camera lens group, it includes along the optical axis from the object side to the image side in proper order: a first lens having a positive refractive power, an object-side surface of which is convex; a second lens having a refractive power, an image-side surface of which is concave; a third lens having optical power; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and a fifth lens having a negative refractive power, an object side surface of which is concave. The distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and the total effective focal length f of the camera lens group meet the following requirements: TTL/f is less than 1; the maximum field angle FOV of the image pickup lens group satisfies: TAN (FOV/2) < 0.37.
Description
Technical Field
The present application relates to the field of optical elements, and in particular, to an imaging lens group.
Background
With the gradual popularization of intelligent terminals in recent years, people have higher and higher requirements on photographing of portable electronic products such as smart phones. Nowadays, the market demands for an image pickup lens that can realize ultra-clear shooting more and more. Therefore, most mainstream brand designers in the field of lens design are developing imaging lenses capable of realizing an ultra-high-definition shooting function. How to realize an optical system with good imaging quality by reasonably distributing optical power and optimizing optical parameters is one of the problems to be solved by designers in the field of optical design.
SUMMERY OF THE UTILITY MODEL
The present application provides a photographing lens assembly, sequentially from an object side to an image side along an optical axis, comprising: a first lens having a positive refractive power, an object-side surface of which is convex; a second lens having a refractive power, an image-side surface of which is concave; a third lens having optical power; a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and a fifth lens having a negative refractive power, an object side of which is concave.
In one embodiment, a distance TTL on the optical axis from the object side surface of the first lens to the imaging surface of the image pickup lens group and a total effective focal length f of the image pickup lens group may satisfy: TTL/f is less than 1.
In one embodiment, the effective focal length f1 of the first lens, the effective focal length f2 of the second lens, and the maximum field angle FOV of the image capture lens group may satisfy: -2.5 < f1/(f2 Xtan (FOV/2)) < -1.5.
In one embodiment, the effective focal length f5 of the fifth lens and the effective focal length f2 of the second lens satisfy: f5/f2 is more than 0.9 and less than 2.5.
In one embodiment, the maximum field angle FOV of the image pickup lens group may satisfy: TAN (FOV/2) < 0.37.
In one embodiment, the radius of curvature R1 of the object-side surface of the first lens and the radius of curvature R4 of the image-side surface of the second lens may satisfy: R1/R4 is more than or equal to 0.6 and less than 1.5.
In one embodiment, a separation distance T34 on the optical axis of the third lens and the fourth lens, a center thickness CT4 of the fourth lens, a separation distance T45 on the optical axis of the fourth lens and the fifth lens, and a center thickness CT5 of the fifth lens may satisfy: 1 < T34/(CT4+ T45+ CT5) < 2.5.
In one embodiment, the central thickness CT1 of the first lens, the central thickness CT4 of the fourth lens, the separation distance T45 between the fourth lens and the fifth lens on the optical axis, and the central thickness CT5 of the fifth lens may satisfy: 0.7 < CT1/(CT4+ T45+ CT5) < 1.1.
In one embodiment, the edge thickness ET4 of the fourth lens and the center thickness CT4 of the fourth lens may satisfy: 0.2 < ET4/CT4 < 0.5.
In one embodiment, a distance SAG42 on the optical axis from the intersection point of the image-side surface of the fourth lens and the optical axis to the effective radius vertex of the image-side surface of the fourth lens and a distance SAG41 on the optical axis from the intersection point of the object-side surface of the fourth lens and the optical axis to the effective radius vertex of the object-side surface of the fourth lens may satisfy: 1.7 < SAG42/SAG41 < 2.5.
In one embodiment, the effective half aperture DT21 of the object side surface of the second lens and the effective half aperture DT32 of the image side surface of the third lens satisfy: 1 < DT21/DT32 < 1.5.
In one embodiment, a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the image pickup lens group may satisfy: TTL is more than 7 mm.
In one embodiment, the distance SAG41 on the optical axis from the intersection point of the object-side surface of the fourth lens and the optical axis to the effective radius vertex of the object-side surface of the fourth lens and the central thickness CT4 of the fourth lens may satisfy: -0.8 < SAG41/CT4 < -0.4.
In one embodiment, the effective half aperture DT22 of the image-side surface of the second lens and the effective half aperture DT32 of the image-side surface of the third lens satisfy: 0.8 < DT22/DT32 < 1.
In one embodiment, the effective half aperture DT11 of the object side surface of the first lens, the effective half aperture DT21 of the object side surface of the second lens, and the effective half aperture DT32 of the image side surface of the third lens may satisfy: 1 < (DT11-DT21)/(DT21-DT32) < 6.
In one embodiment, the effective semi-aperture DT11 of the object side surface of the first lens and the half ImgH of the diagonal length of the effective pixel area of the imaging lens group may satisfy: 0.5 < DT11/ImgH < 0.7.
In one embodiment, the edge thickness ET5 of the fifth lens, the center thickness CT5 of the fifth lens, and the distance SAG51 on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens may satisfy: ET5/(CT5-SAG51) is more than or equal to 0.2 and less than 0.8.
Through the above configuration, the photographing lens assembly according to the present application can have at least one advantageous effect of a long focal length, a high pixel, and a high imaging quality.
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 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application;
fig. 2A to 2D respectively show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve of the imaging lens group of example 1;
fig. 3 shows a schematic configuration diagram of an image pickup lens group according to embodiment 2 of the present application;
fig. 4A to 4D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 2;
fig. 5 shows a schematic configuration diagram of an image pickup lens group according to embodiment 3 of the present application;
fig. 6A to 6D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of embodiment 3;
fig. 7 shows a schematic configuration diagram of an image pickup lens group according to embodiment 4 of the present application;
fig. 8A to 8D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 4;
fig. 9 shows a schematic configuration diagram of an image pickup lens group according to embodiment 5 of the present application;
fig. 10A to 10D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 5;
fig. 11 shows a schematic configuration diagram of an image pickup lens group according to embodiment 6 of the present application;
fig. 12A to 12D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a magnification chromatic aberration curve, respectively, of the imaging lens group of example 6;
fig. 13 is a schematic view showing a configuration of an image pickup lens group according to embodiment 7 of the present application; and
fig. 14A to 14D show an on-axis chromatic aberration curve, an astigmatism curve, a distortion curve, and a chromatic aberration of magnification curve, respectively, of the imaging lens group of example 7.
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 should be noted that in this specification, the expressions first, second, third, etc. are used only to distinguish one feature from another, and do not represent any limitation on the features. Thus, the first lens discussed below may also be referred to as the second lens or the third lens 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.
Herein, the paraxial region refers to a region near the optical axis. If the lens surface is convex and the convex position is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the concave position is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side surface of the lens, and the surface of each lens closest to the imaging surface is called the image side surface of the lens.
It will be further understood that the terms "comprises," "comprising," "has," "having," "includes" and/or "including," when used in this specification, specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof. 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.
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. Features, principles and other aspects of the present application will be described in detail below with reference to the drawings.
An image pickup lens group according to an exemplary embodiment of the present application may include five lenses having optical power, which are a first lens, a second lens, a third lens, a fourth lens, and a fifth lens, respectively. The five lenses are arranged along the optical axis in sequence from the object side to the image side. Any adjacent two lenses of the first lens to the fifth lens can have a spacing distance therebetween.
In an exemplary embodiment, the first lens may have a positive optical power, and the object-side surface thereof may be convex; the second lens can have positive focal power or negative focal power, and the image side surface of the second lens can be a concave surface; the third lens may have a positive optical power or a negative optical power; the fourth lens can have positive focal power or negative focal power, the object side surface of the fourth lens can be a concave surface, and the image side surface of the fourth lens can be a convex surface; the fifth lens may have a negative power, and the object side thereof may be concave.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: TTL/f < 1, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the camera lens group on the optical axis, and f is the total effective focal length of the camera lens group. The lens meets the condition that TTL/f is less than 1, is beneficial to reasonable distribution of focal power of each lens, is also beneficial to reducing aberration of the photographic lens, ensures that the lens has good imaging quality, and is beneficial to realizing large telephoto ratio of the photographic lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: -2.5 < f1/(f2 × tan (FOV/2)) < -1.5, wherein f1 is the effective focal length of the first lens, f2 is the effective focal length of the second lens, and the FOV is the maximum field angle of the image-capturing lens group. More specifically, f1, f2, and FOV may further satisfy: -2.4 < f1/(f2 Xtan (FOV/2)) < -1.6. Satisfy-2.5 < f1/(f2 x tan (FOV/2)) < -1.5, be favorable to each lens focal power's reasonable distribution, also be favorable to reducing photographic lens's aberration simultaneously, guarantee that the lens has good image quality, be favorable to realizing the big telephoto ratio of camera lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.9 < f5/f2 < 2.5, wherein f5 is the effective focal length of the fifth lens and f2 is the effective focal length of the second lens. The optical power of each lens is reasonably distributed in space and the aberration of the photographic lens is reduced by meeting the requirement that f5/f2 is more than 0.9 and less than 2.5.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: TAN (FOV/2) < 0.37, where FOV is the maximum field angle of the imaging lens group. The requirement of TAN (FOV/2) < 0.37 is satisfied, which is beneficial to realizing the long-focus characteristic of the camera lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.6 ≦ R1/R4 < 1.5, where R1 is the radius of curvature of the object-side surface of the first lens and R4 is the radius of curvature of the image-side surface of the second lens. R1/R4 of 0.6-1.5 is satisfied, which is beneficial to reasonably adjusting the aberration contribution of the first lens and the fourth lens to the photographic lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 1 < T34/(CT4+ T45+ CT5) < 2.5, where T34 is the separation distance of the third lens and the fourth lens on the optical axis, CT4 is the center thickness of the fourth lens, T45 is the separation distance of the fourth lens and the fifth lens on the optical axis, and CT5 is the center thickness of the fifth lens. More specifically, T34, CT4, T45 and CT5 may further satisfy: 1 < T34/(CT4+ T45+ CT5) < 2.1. Meets the requirements of 1 < T34/(CT4+ T45+ CT5) < 2.5, and can better ensure the requirements of processability and manufacturability.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.7 < CT1/(CT4+ T45+ CT5) < 1.1, where CT1 is the center thickness of the first lens, CT4 is the center thickness of the fourth lens, T45 is the separation distance of the fourth lens and the fifth lens on the optical axis, and CT5 is the center thickness of the fifth lens. The requirement of 0.7 < CT1/(CT4+ T45+ CT5) < 1.1 is met, the axial chromatic aberration and the spherical aberration of the optical system are favorably corrected, and better imaging performance is obtained.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.2 < ET4/CT4 < 0.5, wherein ET4 is the edge thickness of the fourth lens and CT4 is the center thickness of the fourth lens. More specifically, ET4 and CT4 further satisfy: 0.3 < ET4/CT4 < 0.5. The requirement that ET4/CT4 is more than 0.2 and less than 0.5 is met, and the fourth lens is beneficial to processing and molding.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 1.7 < SAG42/SAG41 < 2.5, wherein SAG42 is the distance on the optical axis from the intersection point of the image side surface of the fourth lens and the optical axis to the effective radius vertex of the image side surface of the fourth lens, and SAG41 is the distance on the optical axis from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens. More specifically, SAG42 and SAG41 further may satisfy: 1.7 < SAG42/SAG41 < 2.4. The bending of the lens is favorably limited, the manufacturing and forming difficulty of the lens is reduced, and the processing and forming are favorably realized, because the SAG42/SAG41 is more than 1.7 and less than 2.5.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 1 < DT21/DT32 < 1.5, where DT21 is the effective half aperture of the object side surface of the second lens and DT32 is the effective half aperture of the image side surface of the third lens. More specifically, DT21 and DT32 further satisfy: 1 < DT21/DT32 < 1.3. The requirements of 1 < DT21/DT32 < 1.5 are met, and the space distribution of the photographic lens is more reasonable.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: TTL is more than 7mm, wherein TTL is the distance between the object side surface of the first lens and the imaging surface of the camera lens group on the optical axis. More specifically, TTL can further satisfy: TTL is more than 7.2 mm. The TTL is more than 7mm, and the higher imaging quality of the camera lens group is favorably realized.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: -0.8 < SAG41/CT4 < -0.4, wherein SAG41 is the distance on the optical axis from the intersection of the object-side surface of the fourth lens and the optical axis to the vertex of the effective radius of the object-side surface of the fourth lens, and CT4 is the central thickness of the fourth lens. Satisfies-0.8 < SAG41/CT4 < -0.4, and is beneficial to the processing and forming of the fourth lens.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.8 < DT22/DT32 < 1, wherein DT22 is the effective half aperture of the image side surface of the second lens and DT32 is the effective half aperture of the image side surface of the third lens. The requirements of DT22/DT32 of 0.8 < 1 are met, the structure of the photographic lens is compact, and the assembly of the lens group is convenient.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 1 < (DT11-DT21)/(DT21-DT32) < 6, wherein DT11 is the effective half aperture of the object side surface of the first lens, DT21 is the effective half aperture of the object side surface of the second lens, and DT32 is the effective half aperture of the image side surface of the third lens. More specifically, DT11, DT21 and DT32 may further satisfy: 1.1 < (DT11-DT21)/(DT21-DT32) < 6. Satisfies 1 < (DT11-DT21)/(DT21-DT32) < 6, and is beneficial to making the spatial distribution of the lens more reasonable.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.5 < DT11/ImgH < 0.7, where DT11 is the effective half aperture of the object side surface of the first lens and ImgH is half the diagonal length of the effective pixel area of the imaging lens group. More specifically, DT11 and ImgH further satisfy: 0.5 < DT11/ImgH < 0.6. The requirements that DT11/ImgH is more than 0.5 and less than 0.7 are met, and the camera lens is favorably matched with a chip with high pixels.
In an exemplary embodiment, an image pickup lens group according to the present application may satisfy: 0.2 ≦ ET5/(CT5-SAG51) < 0.8, where ET5 is the edge thickness of the fifth lens, CT5 is the center thickness of the fifth lens, and SAG51 is the distance on the optical axis from the intersection of the object-side surface of the fifth lens and the optical axis to the effective radius vertex of the object-side surface of the fifth lens. The content of ET5/(CT5-SAG51) is more than or equal to 0.2 and less than 0.8, which is beneficial to the processing and forming of the fifth lens.
In an exemplary embodiment, an image pickup lens group according to the present application further includes a stop disposed between the object side and the first lens. Alternatively, the above-described image pickup lens group may further include a vignetting stop disposed between the second lens and the third lens. Alternatively, the above-described image pickup lens group may further include a filter for correcting color deviation and/or a protective glass for protecting a photosensitive element located on an image formation surface.
The image pickup lens group according to the above-described embodiment of the present application may employ a plurality of lenses, for example, five lenses as described above. By reasonably distributing the focal power, the surface type, the central thickness of each lens, the on-axis distance between each lens and the like, the volume of the camera lens group can be effectively reduced, and the machinability of the camera lens group is improved, so that the camera lens group is more beneficial to production and processing and can be suitable for portable electronic products. The camera lens group with the configuration has the characteristics of long focus, high pixel, good imaging quality and the like, and can well meet the use requirements of various portable electronic products in the camera scene.
In the embodiment of the present application, at least one of the mirror surfaces of each lens is an aspherical mirror surface, that is, at least one of the object-side surface of the first lens to the image-side surface of the fifth lens is an aspherical mirror surface. The aspheric lens is characterized in that: the curvature varies continuously from the center of the lens to the periphery of the lens. Unlike a spherical lens having a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics, and has advantages of improving distortion aberration and improving astigmatic aberration. After the aspheric lens is adopted, the aberration generated in imaging can be eliminated as much as possible, and the imaging quality is further improved. Optionally, at least one of an object-side surface and an image-side surface of each of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens is an aspheric mirror surface. Optionally, each of the first, second, third, fourth, and fifth lenses has an object-side surface and an image-side surface that are aspheric mirror surfaces.
However, it will be appreciated by those skilled in the art that the number of lenses constituting an imaging lens group can be varied to achieve the various results and advantages described in this specification without departing from the claimed subject matter. For example, although five lenses are exemplified in the embodiment, the imaging lens group is not limited to include five lenses. The imaging lens group may also include other numbers of lenses, if desired.
Specific examples of an image pickup lens group applicable to the above-described embodiments are further described below with reference to the drawings.
Example 1
An image pickup lens group according to embodiment 1 of the present application is described below with reference to fig. 1 to 2D. Fig. 1 shows a schematic configuration diagram of an image pickup lens group according to embodiment 1 of the present application.
As shown in fig. 1, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. 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 a basic parameter table of the imaging lens group of embodiment 1, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm).
TABLE 1
In the present example, the total effective focal length f of the image pickup lens group is 8.00mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.80mm, and the maximum field angle FOV of the image pickup lens group is 38.6 °.
In embodiment 1, the object-side surface and the image-side surface of any one of the first lens E1 to the fifth lens E5 are aspheric surfaces, and the surface shape x of each aspheric lens can be defined by, but is not limited to, the following aspheric surface formula:
wherein x is the rise of the distance from the aspheric surface vertex to the aspheric surface vertex when the aspheric surface is at the position with the height of h along the optical axis direction; c is the paraxial curvature of the aspheric surface, c being 1/R (i.e., paraxial curvature c is the inverse of radius of curvature R in table 1 above); k is a conic coefficient; ai is the correction coefficient of the i-th order of the aspherical surface. The following tables 2-1 and 2-2 show the availableThe high-order coefficient A of each of the aspherical mirror surfaces S1 to S10 in example 14、A6、A8、A10、A12、A14、A16、A18、A20、A22、A24、A26、A28And A30。
TABLE 2-1
| Flour mark | A18 | A20 | A22 | A24 | A26 | A28 | A30 |
| S1 | 2.4301E-04 | -1.9610E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | 4.8155E-04 | -3.2531E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.3086E-02 | -1.6263E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -3.6900E+00 | 1.0010E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -7.5302E-01 | 2.7822E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -1.6473E-01 | 3.3626E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -2.0999E-01 | 5.0970E-02 | -7.8629E-03 | 6.7251E-04 | -1.9483E-05 | -6.4451E-07 | 0.0000E+00 |
| S8 | -4.6304E-01 | 1.5209E-01 | -3.7494E-02 | 6.6458E-03 | -7.9349E-04 | 5.6826E-05 | -1.8370E-06 |
| S9 | 5.6898E-02 | -2.6507E-02 | 7.0335E-03 | -1.1826E-03 | 1.2505E-04 | -7.6212E-06 | 2.0476E-07 |
| S10 | -1.1901E-02 | 4.0811E-03 | -8.9403E-04 | 1.2889E-04 | -1.1891E-05 | 6.3848E-07 | -1.5208E-08 |
Tables 2 to 2
Fig. 2A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 1, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 2B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 1. Fig. 2C shows a distortion curve of the image pickup lens group of embodiment 1, which represents distortion magnitude values corresponding to different angles of view. Fig. 2D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 1, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 2A to 2D, the image capturing lens assembly according to embodiment 1 can achieve good image quality.
Example 2
An image pickup lens group 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 image pickup lens group according to embodiment 2 of the present application.
As shown in fig. 3, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a vignetting stop ST1, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present example, the total effective focal length f of the image pickup lens group is 8.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.80mm, and the maximum field angle FOV of the image pickup lens group is 38.4 °.
Table 3 shows a basic parameter table of the image pickup lens group of embodiment 2, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 4-1 and 4-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 2, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 3
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 | A16 |
| S1 | -1.7846E-03 | 4.4387E-04 | -5.6276E-03 | 8.4528E-03 | -8.0276E-03 | 4.5320E-03 | -1.5353E-03 |
| S2 | 3.4073E-02 | -2.2778E-04 | -1.8804E-03 | -1.8235E-02 | 2.9929E-02 | -2.2967E-02 | 9.7775E-03 |
| S3 | -3.7744E-02 | 5.3471E-02 | -3.4834E-03 | -4.7258E-02 | 5.8671E-02 | -3.7908E-02 | 1.3972E-02 |
| S4 | -7.4719E-02 | 1.0342E-01 | 1.3087E-01 | -3.2818E-01 | 4.3900E-01 | -2.4809E-01 | -6.6535E-02 |
| S5 | 2.2648E-01 | 2.2486E-02 | -1.6199E-01 | 6.6243E-01 | -1.7380E+00 | 2.7647E+00 | -2.6059E+00 |
| S6 | 2.5470E-01 | 5.5584E-02 | -4.0862E-01 | 1.4285E+00 | -3.4036E+00 | 5.0592E+00 | -4.5235E+00 |
| S7 | 5.7057E-02 | -8.1331E-02 | 1.0030E-01 | -8.5071E-02 | 5.1581E-02 | -2.3188E-02 | 7.5192E-03 |
| S8 | 4.0269E-01 | -8.4602E-01 | 1.0540E+00 | -8.7423E-01 | 5.0606E-01 | -2.0628E-01 | 5.8510E-02 |
| S9 | 5.0361E-01 | -1.1266E+00 | 1.3345E+00 | -9.6995E-01 | 4.2450E-01 | -7.6528E-02 | -2.9372E-02 |
| S10 | 2.1723E-03 | 1.3140E-02 | -2.1855E-01 | 4.5506E-01 | -5.0443E-01 | 3.6199E-01 | -1.8037E-01 |
TABLE 4-1
TABLE 4-2
Fig. 4A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 2, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 4B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 2. Fig. 4C shows a distortion curve of the image pickup lens group of embodiment 2, which represents distortion magnitude values corresponding to different angles of view. Fig. 4D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 2, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 4A to 4D, the imaging lens group according to embodiment 2 can achieve good imaging quality.
Example 3
An image pickup lens group 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 image pickup lens group according to embodiment 3 of the present application.
As shown in fig. 5, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a vignetting stop ST1, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has positive power, and has a concave object-side surface S5 and a convex image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present example, the total effective focal length f of the image pickup lens group is 8.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.83mm, and the maximum field angle FOV of the image pickup lens group is 38.9 °.
Table 5 shows a basic parameter table of the imaging lens group of embodiment 3, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 6-1 and 6-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 3, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 5
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 |
| S1 | -2.7554E-03 | 1.0850E-03 | -6.2355E-03 | 1.0462E-02 | -1.0411E-02 | 6.1566E-03 |
| S2 | 5.6282E-03 | 2.0190E-02 | -3.0499E-02 | 2.8095E-02 | -1.7905E-02 | 7.6413E-03 |
| S3 | -1.5920E-02 | 4.5778E-02 | -2.7834E-02 | -1.9221E-02 | 6.4036E-02 | -7.3599E-02 |
| S4 | -5.7153E-02 | 1.2637E-01 | -4.5340E-02 | -1.4139E-01 | 5.1737E-01 | -8.4223E-01 |
| S5 | 1.0184E-01 | 4.0833E-02 | 8.2277E-02 | -2.2147E-01 | 2.8137E-01 | -2.1347E-01 |
| S6 | 1.1471E-01 | 6.1003E-02 | -4.5423E-02 | 1.5375E-01 | -3.2093E-01 | 3.5711E-01 |
| S7 | 1.6209E-02 | -3.7945E-03 | 4.0772E-02 | -8.9656E-02 | 9.3451E-02 | -5.5024E-02 |
| S8 | -1.7640E-02 | 2.9150E-01 | -7.5250E-01 | 9.9375E-01 | -8.1111E-01 | 4.3823E-01 |
| S9 | -3.5877E-03 | 2.9079E-01 | -8.5827E-01 | 1.1450E+00 | -8.9067E-01 | 4.4474E-01 |
| S10 | 3.6567E-03 | -3.9062E-02 | 1.7799E-02 | 4.9303E-03 | -7.2767E-03 | 3.0135E-03 |
TABLE 6-1
| Flour mark | A16 | A18 | A20 | A22 | A24 | A26 |
| S1 | -2.1606E-03 | 4.1508E-04 | -3.4132E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -2.1155E-03 | 3.4580E-04 | -2.5674E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 4.5515E-02 | -1.4785E-02 | 1.9846E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 7.6209E-01 | -3.7110E-01 | 7.6821E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 9.5348E-02 | -2.3087E-02 | 2.6030E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -2.0167E-01 | 4.5329E-02 | 5.2364E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | 1.8666E-02 | -3.3897E-03 | 2.5597E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | -1.6013E-01 | 3.9146E-02 | -6.1117E-03 | 5.4763E-04 | -2.1261E-05 | 0.0000E+00 |
| S9 | -1.4837E-01 | 3.3442E-02 | -5.0238E-03 | 4.8066E-04 | -2.6367E-05 | 6.2623E-07 |
| S10 | -6.7152E-04 | 8.6834E-05 | -6.1561E-06 | 1.8588E-07 | 0.0000E+00 | 0.0000E+00 |
TABLE 6-2
Fig. 6A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 3, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 6B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 3. Fig. 6C shows a distortion curve of the image pickup lens group of embodiment 3, which represents distortion magnitude values corresponding to different angles of view. Fig. 6D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 3, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 6A to 6D, the imaging lens group according to embodiment 3 can achieve good imaging quality.
Example 4
An image pickup lens group 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 image pickup lens group according to embodiment 4 of the present application.
As shown in fig. 7, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a vignetting stop ST1, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a concave image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present example, the total effective focal length f of the image pickup lens group is 8.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.84mm, and the maximum field angle FOV of the image pickup lens group is 38.9 °.
Table 7 shows a basic parameter table of the imaging lens group of embodiment 4, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 8-1 and 8-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 4, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 7
TABLE 8-1
| Flour mark | A16 | A18 | A20 | A22 | A24 | A26 |
| S1 | -1.2722E-03 | 2.4787E-04 | -2.1388E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -1.8483E-02 | 2.9342E-03 | -2.0288E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 2.6468E-02 | -7.9505E-03 | 9.1981E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | 5.1434E-01 | -1.9999E-01 | 3.3831E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | -4.5817E-02 | 1.8677E-02 | -2.7410E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | 1.2168E-01 | -8.7107E-02 | 2.3256E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -6.1117E-03 | 8.9118E-04 | -5.6040E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 8.0111E-02 | -1.9079E-02 | 2.8141E-03 | -2.3360E-04 | 8.3125E-06 | 0.0000E+00 |
| S9 | 1.7902E-01 | -4.8787E-02 | 8.8750E-03 | -1.0346E-03 | 6.9930E-05 | -2.0846E-06 |
| S10 | 1.2000E-03 | -1.7652E-04 | 1.4190E-05 | -4.8408E-07 | 0.0000E+00 | 0.0000E+00 |
TABLE 8-2
Fig. 8A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 4, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 8B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the image pickup lens group of embodiment 4. Fig. 8C shows a distortion curve of the image pickup lens group of embodiment 4, which represents distortion magnitude values corresponding to different angles of view. Fig. 8D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 4, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 8A to 8D, the imaging lens group according to embodiment 4 can achieve good imaging quality.
Example 5
An image pickup lens group 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 image pickup lens group according to embodiment 5 of the present application.
As shown in fig. 9, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a vignetting stop ST1, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a concave object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present example, the total effective focal length f of the image pickup lens group is 8.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.83mm, and the maximum field angle FOV of the image pickup lens group is 38.9 °.
Table 9 shows a basic parameter table of the imaging lens group of embodiment 5, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 10-1 and 10-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 5, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 9
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 |
| S1 | -1.7744E-03 | -4.7309E-04 | -1.4031E-03 | 1.9217E-03 | -2.0419E-03 | 1.2228E-03 |
| S2 | 1.7667E-02 | 1.3952E-02 | -3.2502E-02 | 3.5169E-02 | -2.4988E-02 | 1.1669E-02 |
| S3 | -1.9999E-02 | 1.0959E-01 | -1.3779E-01 | 1.3329E-01 | -9.3754E-02 | 4.2599E-02 |
| S4 | -2.5918E-02 | 1.4223E-01 | -1.0679E-01 | 9.8607E-02 | -1.2135E-01 | 2.0751E-01 |
| S5 | 1.7554E-01 | -3.2266E-02 | 6.2380E-02 | -2.7419E-01 | 5.6740E-01 | -6.4897E-01 |
| S6 | 1.9971E-01 | -3.8616E-02 | -2.8457E-02 | 4.4688E-02 | -1.3270E-01 | 2.8596E-01 |
| S7 | 1.3099E-02 | -2.1756E-02 | 7.1271E-03 | 8.1837E-03 | -1.3527E-02 | 8.5236E-03 |
| S8 | 3.7316E-02 | -7.3369E-02 | 5.4398E-02 | -2.2330E-02 | 6.2715E-03 | -2.5854E-03 |
| S9 | 1.2797E-01 | -3.1212E-01 | 3.1826E-01 | -1.5516E-01 | 2.6196E-02 | 1.1712E-02 |
| S10 | 5.2812E-02 | -1.9153E-01 | 2.0550E-01 | -1.1892E-01 | 4.3243E-02 | -1.0426E-02 |
TABLE 10-1
| Flour mark | A16 | A18 | A20 | A22 | A24 | A26 |
| S1 | -4.3993E-04 | 8.5946E-05 | -7.2590E-06 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -3.4386E-03 | 5.7900E-04 | -4.2586E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | -1.0288E-02 | 6.7904E-04 | 1.1441E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -2.3507E-01 | 1.3919E-01 | -3.1927E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 4.3014E-01 | -1.5431E-01 | 2.3331E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -3.1982E-01 | 1.7703E-01 | -3.8680E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -2.8471E-03 | 4.9605E-04 | -3.5115E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.3885E-03 | -4.8351E-04 | 9.3056E-05 | -9.0773E-06 | 3.4752E-07 | 0.0000E+00 |
| S9 | -8.7858E-03 | 2.7072E-03 | -4.8850E-04 | 5.3493E-05 | -3.3070E-06 | 8.8889E-08 |
| S10 | 1.6754E-03 | -1.7331E-04 | 1.0476E-05 | -2.8183E-07 | 0.0000E+00 | 0.0000E+00 |
TABLE 10-2
Fig. 10A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 5, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 10B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 5. Fig. 10C shows a distortion curve of the image pickup lens group of example 5, which represents distortion magnitude values corresponding to different angles of view. Fig. 10D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 5, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 10A to 10D, the imaging lens group according to embodiment 5 can achieve good imaging quality.
Example 6
An image pickup lens group 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 image pickup lens group according to embodiment 6 of the present application.
As shown in fig. 11, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a vignetting stop ST1, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a convex object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a convex image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present example, the total effective focal length f of the image pickup lens group is 8.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.77mm, and the maximum field angle FOV of the image pickup lens group is 38.0 °.
Table 11 shows a basic parameter table of the imaging lens group of example 6, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 12-1 and 12-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 6, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
TABLE 11
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 |
| S1 | -2.7645E-03 | -1.8669E-03 | 3.5816E-04 | 9.0187E-04 | -2.1728E-03 | 1.8693E-03 |
| S2 | -1.3270E-02 | 7.3123E-02 | -1.1140E-01 | 1.1553E-01 | -8.4412E-02 | 4.1937E-02 |
| S3 | -4.8587E-02 | 1.2228E-01 | -1.0207E-01 | -6.2721E-03 | 1.3694E-01 | -1.8385E-01 |
| S4 | -9.1487E-02 | 2.0690E-01 | -1.2516E-01 | 8.4320E-02 | -1.2750E-01 | 2.9267E-01 |
| S5 | 1.3915E-01 | 3.6779E-02 | 9.5080E-02 | -5.1469E-01 | 1.1345E+00 | -1.4774E+00 |
| S6 | 1.4367E-01 | 6.6012E-02 | -3.3692E-01 | 1.1420E+00 | -2.7113E+00 | 3.9869E+00 |
| S7 | -1.2974E-02 | 3.2773E-02 | -5.9179E-02 | 5.7552E-02 | -3.5560E-02 | 1.3914E-02 |
| S8 | -9.2736E-02 | 1.3636E-01 | -1.0195E-01 | 1.6041E-02 | 3.2632E-02 | -2.9735E-02 |
| S9 | -1.1833E-01 | 1.6246E-01 | -4.7635E-02 | -9.6018E-02 | 1.3860E-01 | -9.2086E-02 |
| S10 | -5.7050E-02 | 2.4152E-02 | 6.9543E-03 | -1.3046E-02 | 7.2188E-03 | -2.3138E-03 |
TABLE 12-1
| Flour mark | A16 | A18 | A20 | A22 | A24 | A26 |
| S1 | -8.4417E-04 | 1.9608E-04 | -1.8775E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S2 | -1.3383E-02 | 2.4645E-03 | -1.9894E-04 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S3 | 1.2378E-01 | -4.3347E-02 | 6.2547E-03 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S4 | -3.9410E-01 | 2.6758E-01 | -7.0030E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S5 | 1.1547E+00 | -4.9774E-01 | 9.1793E-02 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S6 | -3.4945E+00 | 1.6709E+00 | -3.3472E-01 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S7 | -3.3365E-03 | 4.4687E-04 | -2.5293E-05 | 0.0000E+00 | 0.0000E+00 | 0.0000E+00 |
| S8 | 1.2925E-02 | -3.3818E-03 | 5.4676E-04 | -5.0847E-05 | 2.0993E-06 | 0.0000E+00 |
| S9 | 3.7576E-02 | -1.0090E-02 | 1.7989E-03 | -2.0588E-04 | 1.3735E-05 | -4.0702E-07 |
| S10 | 4.6756E-04 | -5.8722E-05 | 4.1891E-06 | -1.2968E-07 | 0.0000E+00 | 0.0000E+00 |
TABLE 12-2
Fig. 12A shows an on-axis chromatic aberration curve of the imaging lens group of embodiment 6, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 12B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 6. Fig. 12C shows a distortion curve of the image pickup lens group of example 6, which represents distortion magnitude values corresponding to different angles of view. Fig. 12D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 6, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 12A to 12D, the imaging lens group according to embodiment 6 can achieve good imaging quality.
Example 7
An image pickup lens group 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 image pickup lens group according to embodiment 7 of the present application.
As shown in fig. 13, the image capturing lens assembly, in order from an object side to an image side, comprises: a stop STO, a first lens E1, a second lens E2, a vignetting stop ST1, a third lens E3, a fourth lens E4, a fifth lens E5, a filter E6, and an image forming surface S13.
The first lens element E1 has positive power, and has a convex object-side surface S1 and a convex image-side surface S2. The second lens element E2 has negative power, and has a convex object-side surface S3 and a concave image-side surface S4. The third lens element E3 has negative power, and has a concave object-side surface S5 and a concave image-side surface S6. The fourth lens element E4 has positive power, and has a concave object-side surface S7 and a convex image-side surface S8. The fifth lens element E5 has negative power, and has a concave object-side surface S9 and a concave image-side surface S10. Filter E6 has an object side S11 and an image side S12. The light from the object sequentially passes through the respective surfaces S1 to S12 and is finally imaged on the imaging surface S13.
In the present example, the total effective focal length f of the image pickup lens group is 8.01mm, the half ImgH of the diagonal length of the effective pixel area on the imaging surface S13 of the image pickup lens group is 2.83mm, and the maximum field angle FOV of the image pickup lens group is 38.9 °.
Table 13 shows a basic parameter table of the imaging lens group of example 7, in which the units of the radius of curvature, thickness/distance, and focal length are all millimeters (mm). Tables 14-1 and 14-2 show the high-order term coefficients that can be used for each aspherical mirror surface in example 7, wherein each aspherical mirror surface type can be defined by the formula (1) given in example 1 above.
| Flour mark | A4 | A6 | A8 | A10 | A12 | A14 |
| S1 | -1.7227E-03 | -8.9873E-04 | -6.2513E-04 | 8.5865E-04 | -1.0452E-03 | 6.5767E-04 |
| S2 | 6.5221E-04 | 5.6637E-02 | -9.6321E-02 | 1.0294E-01 | -7.5603E-02 | 3.7431E-02 |
| S3 | -6.0611E-02 | 1.5457E-01 | -1.7344E-01 | 1.3597E-01 | -6.3078E-02 | 3.9023E-03 |
| S4 | -5.9991E-02 | 1.6683E-01 | -4.6244E-02 | -1.5520E-01 | 3.9079E-01 | -4.1154E-01 |
| S5 | 1.7624E-01 | 9.5462E-03 | -1.1799E-02 | -1.0633E-01 | 2.8915E-01 | -3.6145E-01 |
| S6 | 1.9360E-01 | -7.1840E-03 | -7.0457E-02 | 1.1315E-01 | -2.1511E-01 | 3.4114E-01 |
| S7 | 2.2716E-03 | 7.0519E-03 | -3.3464E-02 | 4.5393E-02 | -3.5077E-02 | 1.6273E-02 |
| S8 | -1.0128E-02 | 1.5377E-04 | -2.2363E-02 | 4.0585E-02 | -3.2465E-02 | 1.4451E-02 |
| S9 | -9.1722E-02 | -5.2802E-02 | 1.0910E-01 | -3.1371E-02 | -3.1157E-02 | 3.2402E-02 |
| S10 | -9.6023E-02 | -3.1741E-02 | 9.6367E-02 | -6.8917E-02 | 2.7167E-02 | -6.7401E-03 |
TABLE 14-1
TABLE 14-2
Fig. 14A shows an on-axis chromatic aberration curve of the imaging lens group of example 7, which represents a convergent focus deviation of light rays of different wavelengths after passing through the lens. Fig. 14B shows an astigmatism curve representing a meridional field curvature and a sagittal field curvature of the imaging lens group of embodiment 7. Fig. 14C shows a distortion curve of the image pickup lens group of example 7, which represents distortion magnitude values corresponding to different angles of view. Fig. 14D shows a chromatic aberration of magnification curve of the imaging lens group of embodiment 7, which represents a deviation of different image heights on an imaging surface after light passes through the lens. As can be seen from fig. 14A to 14D, the imaging lens group according to embodiment 7 can achieve good imaging quality.
In summary, examples 1 to 7 each satisfy the relationship shown in table 15.
| Conditional expression (A) example | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| TTL/f | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 | 0.90 |
| f1/(f2×tan(FOV/2)) | -1.85 | -1.84 | -2.30 | -1.65 | -1.73 | -2.29 | -1.76 |
| f5/f2 | 1.59 | 1.29 | 1.08 | 0.98 | 1.40 | 2.39 | 1.46 |
| TAN(FOV/2) | 0.35 | 0.35 | 0.35 | 0.35 | 0.35 | 0.34 | 0.35 |
| R1/R4 | 0.95 | 1.00 | 1.36 | 0.87 | 0.60 | 1.37 | 0.93 |
| T34/(CT4+T45+CT5) | 1.20 | 1.45 | 1.09 | 2.04 | 1.29 | 1.26 | 1.51 |
| CT1/(CT4+T45+CT5) | 0.88 | 0.90 | 0.78 | 1.03 | 0.88 | 0.76 | 0.84 |
| ET4/CT4 | 0.45 | 0.44 | 0.38 | 0.40 | 0.38 | 0.39 | 0.38 |
| SAG42/SAG41 | 2.12 | 1.77 | 2.10 | 1.99 | 2.22 | 2.30 | 2.12 |
| DT21/DT32 | 1.26 | 1.29 | 1.05 | 1.21 | 1.17 | 1.16 | 1.18 |
| TTL(mm) | 7.21 | 7.21 | 7.21 | 7.22 | 7.22 | 7.22 | 7.22 |
| SAG41/CT4 | -0.49 | -0.73 | -0.57 | -0.61 | -0.50 | -0.47 | -0.55 |
| DT22/DT32 | 0.91 | 0.97 | 0.86 | 0.98 | 0.95 | 0.91 | 0.95 |
| (DT11-DT21/DT21-DT32) | 1.30 | 1.14 | 5.99 | 1.14 | 1.95 | 2.10 | 1.71 |
| DT11/ImgH | 0.57 | 0.58 | 0.59 | 0.59 | 0.59 | 0.58 | 0.57 |
| ET5/(CT5-SAG51) | 0.25 | 0.20 | 0.55 | 0.76 | 0.23 | 0.41 | 0.30 |
Watch 15
The present application also provides an imaging device whose electron photosensitive element may be a photo-coupled device (CCD) or a complementary metal oxide semiconductor device (CMOS). The imaging device may be a stand-alone imaging device such as a digital camera, or may be an imaging module integrated on a mobile electronic device such as a mobile phone. The imaging device is equipped with the above-described image pickup lens group.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. 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 (30)
1. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a positive refractive power, an object-side surface of which is convex;
a second lens having a refractive power, an image-side surface of which is concave;
a third lens having optical power;
a fourth lens having a focal power, wherein the object-side surface of the fourth lens is a concave surface, and the image-side surface of the fourth lens is a convex surface; and
a fifth lens element having a negative refractive power, the object-side surface of which is concave;
the distance TTL from the object side surface of the first lens to the imaging surface of the camera lens group on the optical axis and the total effective focal length f of the camera lens group meet the following requirements: TTL/f is less than 1;
the maximum field angle FOV of the image pickup lens group satisfies: TAN (FOV/2) < 0.37.
2. The imaging lens group according to claim 1, wherein an effective focal length f5 of the fifth lens and an effective focal length f2 of the second lens satisfy: f5/f2 is more than 0.9 and less than 2.5.
3. The imaging lens group according to claim 1, wherein a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: R1/R4 is more than or equal to 0.6 and less than 1.5.
4. The imaging lens group according to claim 1, wherein a separation distance T34 on the optical axis of the third lens and the fourth lens, a center thickness CT4 of the fourth lens, a separation distance T45 on the optical axis of the fourth lens and the fifth lens, and a center thickness CT5 of the fifth lens satisfy: 1 < T34/(CT4+ T45+ CT5) < 2.5.
5. The imaging lens group according to claim 1, wherein a center thickness CT1 of the first lens, a center thickness CT4 of the fourth lens, a separation distance T45 of the fourth lens and the fifth lens on the optical axis, and a center thickness CT5 of the fifth lens satisfy: 0.7 < CT1/(CT4+ T45+ CT5) < 1.1.
6. The imaging lens group of claim 1, wherein an edge thickness ET4 of the fourth lens and a center thickness CT4 of the fourth lens satisfy: 0.2 < ET4/CT4 < 0.5.
7. The imaging lens group according to claim 1, wherein a distance SAG42 on the optical axis from an intersection point of an image-side surface of the fourth lens and the optical axis to an effective radius vertex of the image-side surface of the fourth lens to a distance SAG41 on the optical axis from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens satisfies: 1.7 < SAG42/SAG41 < 2.5.
8. The imaging lens group according to claim 1, wherein an effective semi-aperture DT21 of an object side surface of the second lens and an effective semi-aperture DT32 of an image side surface of the third lens satisfy: 1 < DT21/DT32 < 1.5.
9. An image pickup lens group according to claim 1, wherein a distance TTL, on the optical axis, from an object side surface of said first lens to an image forming surface of said image pickup lens group satisfies: TTL is more than 7 mm.
10. The imaging lens group according to claim 1, wherein a distance SAG41 on the optical axis from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of the object-side surface of the fourth lens and a center thickness CT4 of the fourth lens satisfy: -0.8 < SAG41/CT4 < -0.4.
11. The imaging lens group according to claim 1, wherein an effective semi-aperture DT22 of an image side surface of the second lens and an effective semi-aperture DT32 of an image side surface of the third lens satisfy: 0.8 < DT22/DT32 < 1.
12. The imaging lens group according to claim 1, wherein an effective semi-aperture diameter DT11 of an object side surface of the first lens, an effective semi-aperture diameter DT21 of an object side surface of the second lens, and an effective semi-aperture diameter DT32 of an image side surface of the third lens satisfy: 1 < (DT11-DT21)/(DT21-DT32) < 6.
13. An imaging lens group according to claim 1, wherein an effective semi-aperture DT11 of an object side surface of the first lens and a half ImgH of a diagonal length of an effective pixel area of the imaging lens group satisfy: 0.5 < DT11/ImgH < 0.7.
14. The imaging lens group according to claim 1, wherein a distance SAG51 on the optical axis from an edge thickness ET5 of the fifth lens, a center thickness CT5 of the fifth lens, and an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens satisfies: ET5/(CT5-SAG51) is more than or equal to 0.2 and less than 0.8.
15. The imaging lens group according to claim 1, wherein an effective focal length f1 of the first lens and an effective focal length f2 of the second lens satisfy: -2.5 < f1/(f2 Xtan (FOV/2)) < -1.5.
16. The image capturing lens assembly, in order from an object side to an image side along an optical axis, comprises:
a first lens having a positive refractive power, an object-side surface of which is convex;
a second lens having a refractive power, an image-side surface of which is concave;
a third lens having optical power;
the image side surface of the fourth lens is a convex surface; and
a fifth lens element having a negative refractive power, the object-side surface of which is concave;
the distance TTL between the object side surface of the first lens and the imaging surface of the camera lens group on the optical axis satisfies the following conditions: TTL is more than 7 mm;
the distance SAG41 from the intersection point of the object side surface of the fourth lens and the optical axis to the effective radius vertex of the object side surface of the fourth lens on the optical axis satisfies the following condition with the central thickness CT4 of the fourth lens: -0.8 < SAG41/CT4 < -0.4.
17. The imaging lens group according to claim 16, wherein a distance TTL on the optical axis from an object side surface of the first lens to an imaging surface of the imaging lens group and a total effective focal length f of the imaging lens group satisfy: TTL/f is less than 1.
18. The imaging lens group of claim 16, wherein an effective focal length f1 of the first lens, an effective focal length f2 of the second lens, and a maximum field angle FOV of the imaging lens group satisfy: -2.5 < f1/(f2 Xtan (FOV/2)) < -1.5.
19. The imaging lens group of claim 16, wherein the maximum field angle FOV of the imaging lens group satisfies: TAN (FOV/2) < 0.37.
20. The imaging lens group according to claim 16, wherein an effective focal length f5 of the fifth lens and an effective focal length f2 of the second lens satisfy: f5/f2 is more than 0.9 and less than 2.5.
21. The imaging lens group of claim 16, wherein a radius of curvature R1 of an object-side surface of the first lens and a radius of curvature R4 of an image-side surface of the second lens satisfy: R1/R4 is more than or equal to 0.6 and less than 1.5.
22. The imaging lens group according to claim 16, wherein a separation distance T34 on the optical axis of the third lens and the fourth lens, a center thickness CT4 of the fourth lens, a separation distance T45 on the optical axis of the fourth lens and the fifth lens, and a center thickness CT5 of the fifth lens satisfy: 1 < T34/(CT4+ T45+ CT5) < 2.5.
23. The imaging lens group according to claim 16, wherein a center thickness CT1 of the first lens, a center thickness CT4 of the fourth lens, a separation distance T45 between the fourth lens and the fifth lens on the optical axis, and a center thickness CT5 of the fifth lens satisfy: 0.7 < CT1/(CT4+ T45+ CT5) < 1.1.
24. The imaging lens group of claim 16, wherein an edge thickness ET4 of the fourth lens and a center thickness CT4 of the fourth lens satisfy: 0.2 < ET4/CT4 < 0.5.
25. The imaging lens group according to claim 16, wherein a distance SAG42 on the optical axis from an intersection point of an image-side surface of the fourth lens and the optical axis to an effective radius vertex of an image-side surface of the fourth lens to a distance SAG41 on the optical axis from an intersection point of an object-side surface of the fourth lens and the optical axis to an effective radius vertex of an object-side surface of the fourth lens satisfies: 1.7 < SAG42/SAG41 < 2.5.
26. The imaging lens group of claim 16, wherein an effective semi-aperture DT21 of the object-side surface of the second lens and an effective semi-aperture DT32 of the image-side surface of the third lens satisfy: 1 < DT21/DT32 < 1.5.
27. The imaging lens group of claim 16, wherein an effective semi-aperture diameter DT22 of the image-side surface of the second lens and an effective semi-aperture diameter DT32 of the image-side surface of the third lens satisfy: 0.8 < DT22/DT32 < 1.
28. The imaging lens group according to claim 16, wherein an effective semi-aperture diameter DT11 of an object side surface of the first lens, an effective semi-aperture diameter DT21 of an object side surface of the second lens, and an effective semi-aperture diameter DT32 of an image side surface of the third lens satisfy: 1 < (DT11-DT21)/(DT21-DT32) < 6.
29. The imaging lens group according to claim 16, wherein an effective semi-aperture DT11 of an object side surface of the first lens and a half ImgH of a diagonal length of an effective pixel area of the imaging lens group satisfy: 0.5 < DT11/ImgH < 0.7.
30. The imaging lens group of claim 16, wherein a distance SAG51 on the optical axis from an edge thickness ET5 of the fifth lens, a center thickness CT5 of the fifth lens, and an intersection point of an object-side surface of the fifth lens and the optical axis to an effective radius vertex of the object-side surface of the fifth lens satisfies: ET5/(CT5-SAG51) is more than or equal to 0.2 and less than 0.8.
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