CN109799597B - Optical imaging lens - Google Patents
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- CN109799597B CN109799597B CN201910242801.1A CN201910242801A CN109799597B CN 109799597 B CN109799597 B CN 109799597B CN 201910242801 A CN201910242801 A CN 201910242801A CN 109799597 B CN109799597 B CN 109799597B
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Abstract
The invention relates to the technical field of lenses. The invention discloses an optical imaging lens, which sequentially comprises a first lens to a tenth lens from an object side to an image side along an optical axis, wherein the first lens is a convex-concave lens with positive refractive index; the second lens is a convex-concave lens with negative refractive index; the third lens is a convex-concave lens with negative refractive index; the fourth lens has positive refractive index, and the object side surface is convex; the fifth lens has positive refractive index, and the image side surface is convex; the sixth lens is a concave-convex lens with positive refractive index; the seventh lens is a concave lens with negative refractive index; the image side surface of the sixth lens is glued with the object side surface of the seventh lens; the eighth lens is a convex lens with positive refractive index; the ninth lens is a concave-convex lens with positive refractive index; the tenth lens is a convex-concave lens with positive refractive index. The invention has the advantages of large image surface and small distortion.
Description
Technical Field
The invention belongs to the technical field of lenses, and particularly relates to a ten-piece optical imaging lens.
Background
With the continuous progress of technology, optical imaging lenses have been rapidly developed in recent years and are widely applied to various fields of smart phones, tablet computers, video conferences, security monitoring and the like, so that requirements on the optical imaging lenses are higher and higher, miniaturization is required, improvement on optical performance and imaging quality is also more and more focused, but the existing undistorted (i.e. small distortion) lenses have smaller image surfaces, less than 7mm and low sensor utilization rate, and cannot meet the increasing requirements of consumers.
Disclosure of Invention
The present invention is directed to an optical imaging lens for solving the above-mentioned problems.
In order to achieve the above purpose, the invention adopts the following technical scheme: an optical imaging lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens from an object side to an image side along an optical axis; the first lens element to the tenth lens element each comprise an object side surface facing the object side and allowing the imaging light to pass therethrough, and an image side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens has positive refractive index, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the second lens has negative refractive index, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the third lens has negative refractive index, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface;
the fourth lens has positive refractive index, and the object side surface of the fourth lens is a convex surface;
the fifth lens has positive refractive index, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has positive refractive index, wherein an object-side surface of the sixth lens element is concave, and an image-side surface of the sixth lens element is convex;
the seventh lens has negative refractive power, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a concave surface;
the image side surface of the sixth lens is glued with the object side surface of the seventh lens;
the eighth lens element has positive refractive index, wherein the object-side surface of the eighth lens element is convex, and the image-side surface of the eighth lens element is convex;
the ninth lens has positive refractive index, the object side surface of the ninth lens is a concave surface, and the image side surface of the ninth lens is a convex surface;
the tenth lens has positive refractive index, the object side surface of the tenth lens is a convex surface, and the image side surface of the tenth lens is a concave surface;
the optical imaging lens has only ten lenses with refractive index.
Further, the optical imaging lens also satisfies: D22/R22 is less than or equal to 1.76, wherein D22 is the aperture of the image side surface of the second lens, and R22 is the curvature radius of the image side surface of the second lens.
Further, the optical imaging lens also satisfies: D32/R32 is less than or equal to 1.73, wherein D32 is the aperture of the image side surface of the third lens, and R32 is the curvature radius of the image side surface of the third lens.
Further, the image side surface of the fourth lens is a plane.
Further, the diaphragm is directly disposed on the image side surface of the fourth lens element, and the object side surface of the fifth lens element is a plane.
Further, the optical imaging lens also satisfies: 2< |r67| <4, wherein R67 is the radius of curvature of the cemented surface of the sixth lens and the seventh lens.
Further, the optical imaging lens also satisfies: 1.55< nd1<1.7, 55< vd1<67;1.55< nd2<1.7, 50< vd2<59;1.48< nd3<1.57, 45< vd3<52;1.68< nd4<1.8, 20< vd4<31;1.86< nd5<1.95, 27< vd5<36;1.53< nd6<1.61, 62< vd6<73;1.8< nd7<1.9, 18< vd7<29;1.6< nd8<1.75, 43< vd8<57;1.7< nd9<1.85, 42< vd9<56;1.9< nd10<2.15, 16< vd10<28, wherein nd1-nd10 respectively denote refractive indices of the first to tenth lenses at d-line, and vd1-vd10 respectively denote abbe numbers of the first to tenth lenses at d-line.
Further, the optical imaging lens also satisfies: 2.7< ALG <4.2, wherein ALG is the sum of air gaps of the first lens to the tenth lens on the optical axis.
Further, the optical imaging lens also satisfies: 14< ALT <16, wherein ALT is the sum of ten lens thicknesses of the first lens to the tenth lens on the optical axis.
Further, the optical imaging lens also satisfies: 4.1< ALT/ALG <4.5, wherein ALG is the sum of the air gaps of the first lens to the tenth lens on the optical axis, ALT is the sum of the thicknesses of the ten lenses of the first lens to the tenth lens on the optical axis.
The beneficial technical effects of the invention are as follows:
the invention adopts ten lenses, and has the advantages of small distortion, almost no distortion, large image surface and more than 7.7mm by the arrangement design of the refractive index and the concave-convex curved surface of each lens. In addition, the invention has the advantages of large visual field, small chromatic aberration and strong color reducibility; the transfer function is well controlled, the resolution and resolution are high, the image sharpness is high, and the image is uniform; the low-illumination characteristic is good, and a clear color image can be realized under the condition of poor light; the infrared defocus is smaller (850 nm infrared offset IR shift <13 um).
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
FIG. 2 is a graph of MTF between 0.435 and 0.646um for example I of the present invention;
FIG. 3 is an infrared 850nm MTF plot according to one embodiment of the present invention;
FIG. 4 is a graph of defocus of 0.435-0.646um for visible light according to example I of the present invention;
FIG. 5 is a graph showing the defocus at 850nm for an IR according to the first embodiment of the present invention;
FIG. 6 is a diagram of field curvature and distortion in accordance with a first embodiment of the present invention;
FIG. 7 is a graph of MTF between 0.435 and 0.646um for example two of the present invention;
FIG. 8 is an infrared 850nm MTF plot for a second embodiment of the present invention;
FIG. 9 is a graph of defocus of 0.435-0.646um for visible light according to example two of the present invention;
FIG. 10 is a graph showing the defocus at 850nm for infrared ray according to the second embodiment of the present invention;
FIG. 11 is a diagram illustrating curvature of field and distortion in accordance with a second embodiment of the present invention;
FIG. 12 is a graph of MTF between 0.435 and 0.646um for example III of the present invention;
FIG. 13 is an infrared 850nm MTF plot for example three of the present invention;
FIG. 14 is a graph of defocus of 0.435-0.646um for visible light according to example three of the present invention;
FIG. 15 is a plot of infrared 850nm defocus for example three of the present invention;
FIG. 16 is a diagram showing curvature of field and distortion in accordance with a third embodiment of the present invention;
FIG. 17 is a graph of MTF between 0.435 and 0.646um for example IV of the present invention;
FIG. 18 is an infrared 850nm MTF plot for example four of the present invention;
FIG. 19 is a graph of defocus of 0.435-0.646um for visible light according to example four of the present invention;
FIG. 20 is a graph showing the defocus at 850nm for infrared ray according to the fourth embodiment of the present invention;
FIG. 21 is a diagram showing curvature of field and distortion in accordance with a fourth embodiment of the present invention;
fig. 22 is a table showing the values of the respective important parameters according to the four embodiments of the present invention.
Detailed Description
For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.
The invention will now be further described with reference to the drawings and detailed description.
The term "a lens having a positive refractive index (or negative refractive index)" means that the paraxial refractive index of the lens calculated by Gaussian optics theory is positive (or negative). The term "object side (or image side) of a lens" is defined as the specific range of imaging light rays passing through the lens surface. The surface roughness determination of the lens can be performed by a determination method by a person of ordinary skill in the art, that is, by a sign of a radius of curvature (abbreviated as R value). The R value may be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in the lens data sheet (lens data sheet) of optical design software. When the R value is positive, the object side surface is judged to be convex; when the R value is negative, the object side surface is judged to be a concave surface. On the contrary, when the R value is positive, the image side surface is judged to be concave; when the R value is negative, the image side surface is determined to be convex.
The invention provides an optical imaging lens, which sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens from an object side to an image side along an optical axis; the first lens element to the tenth lens element each comprise an object side surface facing the object side and allowing the imaging light to pass therethrough, and an image side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens has positive refractive index, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the second lens has negative refractive index, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the third lens has negative refractive index, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface;
the fourth lens has positive refractive index, and the object side surface of the fourth lens is a convex surface;
the fifth lens has positive refractive index, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has positive refractive index, wherein an object-side surface of the sixth lens element is concave, and an image-side surface of the sixth lens element is convex;
the seventh lens has negative refractive power, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a concave surface; the sixth lens is a crescent lens and the seventh lens is a biconcave lens, so that the core thickness sensitivity of the lens is lower, assembly with smaller core thickness tolerance can be ensured, and the product yield is improved.
The image side surface of the sixth lens is glued with the object side surface of the seventh lens; the color difference is reduced, and the imaging quality is improved.
The eighth lens element has positive refractive index, wherein the object-side surface of the eighth lens element is convex, and the image-side surface of the eighth lens element is convex;
the ninth lens has positive refractive index, the object side surface of the ninth lens is a concave surface, and the image side surface of the ninth lens is a convex surface;
the tenth lens has positive refractive index, the object side surface of the tenth lens is a convex surface, and the image side surface of the tenth lens is a concave surface;
the optical imaging lens has only ten lenses with refractive index. Ten lenses are adopted, and the refractive index and the concave-convex curved surface of each lens are arranged, so that the lens has the advantages of small distortion, almost no distortion, large image surface and more than 7.7 mm.
Preferably, the optical imaging lens further satisfies: D22/R22 is less than or equal to 1.76, wherein D22 is the aperture of the image side surface of the second lens, and R22 is the curvature radius of the image side surface of the second lens. On the premise of realizing the low f-theta distortion function, the method is convenient for processing.
Preferably, the optical imaging lens further satisfies: D32/R32 is less than or equal to 1.73, wherein D32 is the aperture of the image side surface of the third lens, and R32 is the curvature radius of the image side surface of the third lens. On the premise of realizing the low f-theta distortion function, the method is convenient for processing.
Preferably, the image side surface of the fourth lens is a plane. The assembly of the four lenses in front of the diaphragm at a smaller inclination tolerance can be conveniently ensured, the assembly yield is improved, and of course, in some embodiments, the image side surface of the fourth lens can be convex or concave.
More preferably, the diaphragm is directly arranged on the image side surface of the fourth lens, the object side surface of the fifth lens is a plane, and the aperture spacing management and control of + -1um are facilitated by combining the plane vector height of the object side surface of the fifth lens, so that the assembly of four lenses in front of the diaphragm at smaller inclination tolerance can be conveniently ensured, and the product yield is improved. Of course, in some embodiments, the object side surface of the fifth lens element may be convex or concave.
Preferably, the optical imaging lens further satisfies: 2< |r67| <4, wherein R67 is the radius of curvature of the cemented surface of the sixth lens and the seventh lens. The color difference is reduced, and the imaging quality is improved.
Preferably, the optical imaging lens further satisfies: 1.55< nd1<1.7, 55< vd1<67;1.55< nd2<1.7, 50< vd2<59;1.48< nd3<1.57, 45< vd3<52;1.68< nd4<1.8, 20< vd4<31;1.86< nd5<1.95, 27< vd5<36;1.53< nd6<1.61, 62< vd6<73;1.8< nd7<1.9, 18< vd7<29;1.6< nd8<1.75, 43< vd8<57;1.7< nd9<1.85, 42< vd9<56;1.9< nd10<2.15, 16< vd10<28, wherein nd1-nd10 respectively denote refractive indices of the first to tenth lenses at d-line, and vd1-vd10 respectively denote abbe numbers of the first to tenth lenses at d-line. The combination of the series of materials can realize better visible and infrared confocal performance, infrared offset IR shift of 850nm is less than 13um, and better chromatic aberration performance, MTF performance and low distortion performance can be realized.
Preferably, the optical imaging lens further satisfies: 2.7< ALG <4.2, wherein ALG is the sum of air gaps of the first lens to the tenth lens on the optical axis. The system length of the optical imaging lens is further shortened, the processing and the manufacturing are easy, and the system configuration is optimized.
Preferably, the optical imaging lens further satisfies: 14< ALT <16, wherein ALT is the sum of ten lens thicknesses of the first lens to the tenth lens on the optical axis. The system length of the optical imaging lens is further shortened, the processing and the manufacturing are easy, and the system configuration is optimized.
Preferably, the optical imaging lens further satisfies: 4.1< ALT/ALG <4.5, wherein ALG is the sum of the air gaps of the first lens to the tenth lens on the optical axis, ALT is the sum of the thicknesses of the ten lenses of the first lens to the tenth lens on the optical axis. The system length of the optical imaging lens is further shortened, the processing and the manufacturing are easy, and the system configuration is optimized.
The optical imaging lens of the present invention will be described in detail with specific examples.
Implement one
As shown in fig. 1, an optical imaging lens includes, in order from an object side A1 to an image side A2 along an optical axis I, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a stop (not shown), a fifth lens 5, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 10, an optical filter 110, a cover glass 120, and an imaging surface 130; the first lens element 1 to the tenth lens element 10 respectively comprise an object side surface facing the object side A1 and allowing the imaging light to pass therethrough and an image side surface facing the image side A2 and allowing the imaging light to pass therethrough;
the first lens element 1 has a positive refractive power, wherein an object-side surface 11 of the first lens element 1 is convex, and an image-side surface 12 of the first lens element 1 is concave;
the second lens element 2 has a negative refractive power, wherein an object-side surface 21 of the second lens element 2 is convex, and an image-side surface 22 of the second lens element 2 is concave;
the third lens element 3 has a negative refractive power, wherein an object-side surface 31 of the third lens element 3 is convex, and an image-side surface 32 of the third lens element 3 is concave;
the fourth lens element 4 has positive refractive power, wherein an object-side surface 41 of the fourth lens element 4 is convex, an image-side surface 42 of the fourth lens element 4 is planar, and the stop is directly disposed on the planar surface 42;
the fifth lens element 5 has positive refractive power, wherein an object-side surface 51 of the fifth lens element 5 is a plane, and an image-side surface 52 of the fifth lens element 5 is a convex surface;
the sixth lens element 6 with positive refractive power has a concave object-side surface 61 and a convex image-side surface 62;
the seventh lens element 7 with negative refractive power has a concave object-side surface 71 and a concave image-side surface 72; the image side surface 62 of the sixth lens element 6 and the object side surface 71 of the seventh lens element 7 are cemented together.
The eighth lens element 8 has a positive refractive power, wherein an object-side surface 81 of the eighth lens element 8 is convex, and an image-side surface 82 of the eighth lens element 8 is convex;
the ninth lens element 9 has a positive refractive power, wherein an object-side surface 91 of the ninth lens element 9 is concave, and an image-side surface 92 of the ninth lens element 9 is convex;
the tenth lens element 10 has a positive refractive power, wherein an object-side surface 101 of the tenth lens element 10 is convex, and an image-side surface 102 of the tenth lens element 10 is concave;
in this embodiment, the filter 110 may be an ir cut filter, so as to prevent ir in the light from being transmitted to the imaging surface and affecting the imaging quality.
The detailed optical data of this particular example are shown in Table 1-1.
Table 1-1 detailed optical data for example one
The numerical values of the conditional expressions of this embodiment refer to fig. 22, in which TTL is the distance between the first lens 1 and the imaging plane 130 on the optical axis I.
The resolution of this embodiment is shown in fig. 2 and 3, and it can be seen from the figure that the transfer control is good, the resolution is high, the confocal between visible light and infrared 850nm is shown in fig. 4 and 5, the confocal between visible light and infrared is good, the infrared offset IR shift of 850nm is less than 13um, the distortion is small, and the distortion is almost zero.
In this specific embodiment, the focal length f=5.40 mm of the focal length optical imaging lens of the optical imaging lens; aperture value fno=2.75; the image plane size Φ=7.72 mm; field angle fov=72.
Implement two
In this embodiment, the surface roughness and refractive index of each lens are the same as those of the first embodiment, and only the optical parameters such as the radius of curvature and the lens thickness of each lens surface are different.
The detailed optical data of this particular example are shown in Table 2-1.
Table 2-1 detailed optical data for example two
The numerical values of the respective conditional expressions of this embodiment are shown in fig. 22.
The resolution of this embodiment is shown in fig. 7 and 8, and it can be seen from the figure that the transfer control is good, the resolution is high, the confocal between visible light and infrared 850nm is shown in fig. 9 and 10, the confocal between visible light and infrared is good, the infrared offset IR shift of 850nm is less than 13um, the distortion is small, and the distortion is almost zero.
In this specific embodiment, the focal length f=5.39 mm of the focal length optical imaging lens of the optical imaging lens; aperture value fno=2.77; the image plane size Φ=7.71 mm; field angle fov=72.5.
Implementation three
In this embodiment, the surface roughness and refractive index of each lens are the same as those of the first embodiment, and only the optical parameters such as the radius of curvature and the lens thickness of each lens surface are different.
The detailed optical data of this particular example are shown in Table 3-1.
Table 3-1 detailed optical data for example three
| Surface of the body | Radius of curvature | Thickness of (L) | Material of material | Refractive index | Coefficient of dispersion | Focal length | |
| - | Object plane | Infinity | Infinity | ||||
| 11 | First lens | 13.306 | 1.838 | H-ZK9B | 1.62 | 60.37 | 31.00 |
| 12 | 40.519 | 0.100 | |||||
| 21 | Second lens | 6.218 | 0.717 | H-ZK10L | 1.62 | 56.95 | -10.12 |
| 22 | 2.996 | 1.280 | |||||
| 31 | Third lens | 7.884 | 0.597 | H-QF6A | 1.53 | 48.85 | -7.99 |
| 34 | 2.696 | 1.410 | |||||
| 41 | Fourth lens | 11.624 | 2.944 | H-ZF12 | 1.76 | 26.61 | 15.12 |
| 42 | Infinity | 0.000 | |||||
| - | Diaphragm | Infinity | 0.025 | 5.49 | |||
| 51 | Fifth lens | Infinity | 2.905 | TAFD25 | 1.90 | 31.32 | |
| 52 | -4.995 | 0.097 | 6.43 | ||||
| 61 | Sixth lens | -40.075 | 1.454 | FCD515 | 1.59 | 68.62 | |
| 62 | -3.538 | 0 | |||||
| 71 | Seventh lens | -3.538 | 0.555 | H-ZF52 | 1.85 | 23.79 | -3.14 |
| 72 | 11.921 | 0.322 | |||||
| 81 | Eighth lens | 143.888 | 1.895 | H-LAF1 | 1.69 | 49.23 | 10.17 |
| 82 | -7.414 | 0.116 | |||||
| 91 | Ninth lens | -151.005 | 1.054 | H-LAF50B | 1.77 | 49.61 | 30.16 |
| 92 | -20.330 | 0.206 | |||||
| 101 | Tenth lens | 17.369 | 1.109 | TAFD40 | 2.00 | 25.45 | 32.282 |
| 102 | 35.976 | 2.071 | |||||
| 110 | Optical filter | Infinity | 0.300 | H-K9L | 1.52 | 64.21 | Infinity |
| - | Infinity | 3.888 | |||||
| 130 | Protective glass | Infinity | 0.400 | H-K9L | 1.52 | 64.21 | Infinity |
| - | Infinity | 0.100 | |||||
| 130 | Imaging surface | Infinity |
The numerical values of the respective conditional expressions of this embodiment are shown in fig. 22.
The resolution of this embodiment is shown in fig. 12 and 13, and it can be seen from the figure that the transfer control is good, the resolution is high, the confocal between visible light and infrared 850nm is shown in fig. 14 and 15, the confocal between visible light and infrared is good, the infrared offset IR shift of 850nm is less than 13um, the distortion is small, and the distortion is almost zero as shown in fig. 16 (a) and 16 (B).
In this embodiment, the focal length f=5.41 mm of the optical imaging lens; aperture value fno=2.79; the image plane size Φ=7.73 mm; field angle fov=72.3.
Implement four
In this embodiment, the surface roughness and refractive index of each lens are the same as those of the first embodiment, and only the optical parameters such as the radius of curvature and the lens thickness of each lens surface are different.
The detailed optical data of this particular example are shown in Table 4-1.
Table 4-1 detailed optical data for example four
| Surface of the body | Radius of curvature | Thickness of (L) | Material of material | Refractive index | Coefficient of dispersion | Focal length | |
| - | Object plane | Infinity | Infinity | ||||
| 11 | First lens | 13.847 | 1.807 | H-ZK9B | 1.62 | 60.37 | 32.00 |
| 12 | 43.103 | 0.100 | |||||
| 21 | Second lens | 6.227 | 0.750 | H-ZK10L | 1.62 | 56.95 | -10.37 |
| 22 | 3.028 | 1.246 | |||||
| 31 | Third lens | 7.972 | 0.595 | H-QF6A | 1.53 | 48.85 | -7.90 |
| 34 | 2.689 | 1.411 | |||||
| 41 | Fourth lens | 11.535 | 2.982 | H-ZF12 | 1.76 | 26.61 | 15.01 |
| 42 | Infinity | 0.000 | |||||
| - | Diaphragm | Infinity | 0.025 | 5.50 | |||
| 51 | Fifth lens | Infinity | 2.893 | TAFD25 | 1.90 | 31.32 | |
| 52 | -5.010 | 0.098 | 6.42 | ||||
| 61 | Sixth lens | -40.670 | 1.449 | FCD515 | 1.59 | 68.62 | |
| 62 | -3.539 | 0 | |||||
| 71 | Seventh lens | -3.539 | 0.555 | H-ZF52 | 1.85 | 23.79 | -3.14 |
| 72 | 11.888 | 0.328 | |||||
| 81 | Eighth lens | 144.353 | 1.918 | H-LAF1 | 1.69 | 49.23 | 10.01 |
| 82 | -7.288 | 0.157 | |||||
| 91 | Ninth lens | -150.939 | 1.040 | H-LAF50B | 1.77 | 49.61 | 31.37 |
| 92 | -21.029 | 0.098 | |||||
| 101 | Tenth lens | 17.737 | 1.128 | TAFD40 | 2.00 | 25.45 | 32.548 |
| 102 | 37.292 | 2.087 | |||||
| 110 | Optical filter | Infinity | 0.300 | H-K9L | 1.52 | 64.21 | Infinity |
| - | Infinity | 3.920 | |||||
| 130 | Protective glass | Infinity | 0.400 | H-K9L | 1.52 | 64.21 | Infinity |
| - | Infinity | 0.100 | |||||
| 130 | Imaging surface | Infinity |
The numerical values of the respective conditional expressions of this embodiment are shown in fig. 22.
The resolution of this embodiment is shown in fig. 17 and 18, and it can be seen from the figure that the transfer control is good, the resolution is high, the confocal between visible light and infrared 850nm is shown in fig. 19 and 20, the confocal between visible light and infrared is good, the infrared offset IR shift of 850nm is less than 13um, the distortion is small, and the distortion is almost zero, as shown in fig. 21 (a) and 21 (B).
In this embodiment, the focal length f=5.4 mm of the optical imaging lens; aperture value fno=2.78; the image plane size Φ=7.71 mm; field angle fov=71.6.
The invention adopts ten lenses, and has the advantages of small distortion, almost no distortion, large image surface and more than 7.7mm by the arrangement design of the refractive index and the concave-convex curved surface of each lens. In addition, the invention has the advantages of large visual field, small chromatic aberration and strong color reducibility; the transfer function is well controlled, the resolution and resolution are high, the image sharpness is high, and the image is uniform; the low-illumination characteristic is good, and a clear color image can be realized under the condition of poor light; the infrared defocus is smaller (850 nm infrared offset IR shift <13 um).
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. An optical imaging lens, characterized in that: the optical lens system comprises a first lens, a second lens, a third lens, a fourth lens, a diaphragm, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens in sequence from an object side to an image side along an optical axis; the first lens element to the tenth lens element each comprise an object side surface facing the object side and allowing the imaging light to pass therethrough, and an image side surface facing the image side and allowing the imaging light to pass therethrough;
the first lens has positive refractive index, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface;
the second lens has negative refractive index, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface;
the third lens has negative refractive index, the object side surface of the third lens is a convex surface, and the image side surface of the third lens is a concave surface;
the fourth lens has positive refractive index, and the object side surface of the fourth lens is a convex surface;
the fifth lens has positive refractive index, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has positive refractive index, wherein an object-side surface of the sixth lens element is concave, and an image-side surface of the sixth lens element is convex;
the seventh lens has negative refractive power, the object side surface of the seventh lens is a concave surface, and the image side surface of the seventh lens is a concave surface;
the image side surface of the sixth lens is glued with the object side surface of the seventh lens;
the eighth lens element has positive refractive index, wherein the object-side surface of the eighth lens element is convex, and the image-side surface of the eighth lens element is convex;
the ninth lens has positive refractive index, the object side surface of the ninth lens is a concave surface, and the image side surface of the ninth lens is a convex surface;
the tenth lens has positive refractive index, the object side surface of the tenth lens is a convex surface, and the image side surface of the tenth lens is a concave surface;
the optical imaging lens has only ten lenses with refractive index, and the optical imaging lens also meets the following requirements: d22/r22 is less than or equal to 1.76 and D32/r32 is less than or equal to 1.73, wherein D22 is the aperture of the image side of the second lens, R22 is the radius of curvature of the image side of the second lens, D32 is the aperture of the image side of the third lens, and R32 is the radius of curvature of the image side of the third lens.
2. The optical imaging lens of claim 1, wherein: the image side surface of the fourth lens is a plane.
3. The optical imaging lens of claim 2, wherein: the diaphragm is directly arranged on the image side surface of the fourth lens, and the object side surface of the fifth lens is a plane.
4. The optical imaging lens of claim 1, further satisfying: 2mm < |R67| <4mm, wherein R67 is the radius of curvature of the bonding surface of the sixth lens and the seventh lens.
5. The optical imaging lens of claim 1, further satisfying: 1.55< nd1<1.7, 55< vd1<67;1.55< nd2<1.7, 50< vd2<59;1.48< nd3<1.57, 45< vd3<52;1.68< nd4<1.8, 20< vd4<31;1.86< nd5<1.95, 27< vd5<36;1.53< nd6<1.61, 62< vd6<73;1.8< nd7<1.9, 18< vd7<29;1.6< nd8<1.75, 43< vd8<57;1.7< nd9<1.85, 42< vd9<56;1.9< nd10<2.15, 16< vd10<28, wherein nd1-nd10 respectively denote refractive indices of the first to tenth lenses at d-line, and vd1-vd10 respectively denote abbe numbers of the first to tenth lenses at d-line.
6. The optical imaging lens of claim 1, further satisfying: 2.7mm < ALG <4.2mm, wherein ALG is the sum of the air gaps of the first lens to the tenth lens on the optical axis.
7. The optical imaging lens of claim 1, further satisfying: 14mm < ALT <16mm, where ALT is the sum of ten lens thicknesses of the first lens to the tenth lens on the optical axis.
8. The optical imaging lens of claim 1, further satisfying: 4.1< ALT/ALG <4.5, wherein ALG is the sum of the air gaps of the first lens to the tenth lens on the optical axis, ALT is the sum of the thicknesses of the ten lenses of the first lens to the tenth lens on the optical axis.
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| CN110308541B (en) * | 2019-08-06 | 2024-03-29 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN110542994B (en) * | 2019-09-10 | 2024-05-17 | 厦门力鼎光电股份有限公司 | Fish-eye lens |
| CN110568591B (en) * | 2019-09-25 | 2024-05-28 | 深圳市中达瑞和科技有限公司 | Lens and camera system |
| CN110542997B (en) * | 2019-10-10 | 2024-05-17 | 厦门力鼎光电股份有限公司 | Optical imaging lens |
| CN112817119B (en) * | 2019-11-15 | 2021-11-16 | 中国科学院长春光学精密机械与物理研究所 | An aerospace optical lens |
| WO2021114241A1 (en) * | 2019-12-13 | 2021-06-17 | 诚瑞光学(常州)股份有限公司 | Photographing optical lens |
| WO2021114246A1 (en) * | 2019-12-13 | 2021-06-17 | 诚瑞光学(常州)股份有限公司 | Camera optical lens |
| CN111158121B (en) * | 2020-03-10 | 2024-07-19 | 厦门力鼎光电股份有限公司 | An optical imaging lens |
| CN111856717B (en) * | 2020-08-18 | 2023-12-15 | 浙江舜宇光学有限公司 | Optical imaging lens |
| CN113472983B (en) * | 2021-06-18 | 2023-04-07 | 深圳睿晟自动化技术有限公司 | Camera module field curvature correction method and system |
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