CN111694132B - Optical imaging lens with large light transmission and large image plane - Google Patents
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- 239000006185 dispersion Substances 0.000 claims description 15
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- 239000000463 material Substances 0.000 description 5
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 230000014509 gene expression Effects 0.000 description 4
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- 230000003746 surface roughness Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
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Abstract
The invention relates to the technical field of lenses. The invention discloses an optical imaging lens with large light transmission and large image plane, comprising fourteen lenses; the first, fourth, sixth, eighth and ninth lenses are all convex lenses with positive refractive index; the second lens and the tenth lens are convex-concave lenses with negative refractive index; the third lens and the seventh lens are concave lenses with negative refractive index; the fifth lens and the twelfth lens are plano-convex lenses with positive refractive index; the eleventh lens is a convex-concave lens with positive refractive index; the thirteenth lens is a concave graph lens with negative refractive index; the fourteenth lens is a convex flat lens with positive refractive index; the third lens and the fourth lens are glued with each other; the tenth lens and the eleventh lens are glued with each other; the twelfth lens and the thirteenth lens are cemented with each other. The invention has high resolution and good imaging quality; the image surface is large; the light transmission is large; little or no defocus at high and low temperature; CRA chief ray incidence angle advantage.
Description
Technical Field
The invention belongs to the technical field of lenses, and particularly relates to an optical imaging lens with large light transmission and large image plane.
Background
With the continuous progress of science and technology and the continuous development of society, in recent years, an optical imaging lens is also rapidly developed and is widely applied to various fields such as smart phones, tablet personal computers, video conferences, vehicle-mounted monitoring, security monitoring, machine vision, intelligent transportation systems and the like, so that the requirements on the optical imaging lens are also higher and higher.
In an intelligent traffic system, the performance of an optical imaging lens is critical, and the reliability of the whole system can be affected. However, the optical imaging lens applied to the intelligent traffic system at present has low resolution and lower pixels; when the lens is used in a high-low temperature environment, the defocus is serious; the image surface is smaller at the 16mm focal length section, and generally only reaches phi 16mm; the light transmission is generally smaller, the light incoming quantity is smaller in a low-illumination environment, and the photographed image is darker; when the image plane is larger, the incidence angle of the main light of the CRA is larger and larger than 12 degrees, and the main light is matched with a Sensor (Sensor) of the smaller CRA, so that the problems of dark edges and color cast are easily caused, the increasingly-improved requirements of an intelligent traffic system cannot be met, and improvement is urgently needed.
Disclosure of Invention
The invention aims to provide an optical imaging lens with large light transmission and large image plane, which is used for solving the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme: an optical imaging lens with large light transmission and large image surface sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis; the first lens element to the fourteenth 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 convex 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 concave surface, and the image side surface of the third lens is a concave surface;
The fourth lens has positive refractive index, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;
the fifth lens has positive refractive index, the object side surface of the fifth lens is a plane, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has positive refractive index, wherein the object-side surface of the sixth lens element is convex, and the image-side surface of the sixth lens element is convex;
The seventh lens has negative refractive index, 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 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 element has positive refractive index, wherein the object-side surface of the ninth lens element is convex, and the image-side surface of the ninth lens element is convex;
The tenth lens has negative 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 eleventh lens has positive refractive index, the object side surface of the eleventh lens is a convex surface, and the image side surface of the eleventh lens is a concave surface;
the twelfth lens has positive refractive index, the object side surface of the twelfth lens is a plane, and the image side surface of the twelfth lens is a convex surface;
the thirteenth lens has negative refractive index, the object side surface of the thirteenth lens is a concave surface, and the image side surface of the thirteenth lens is a convex surface;
The fourteenth lens element has positive refractive index, wherein the object-side surface of the fourteenth lens element is convex, and the image-side surface of the fourteenth lens element is planar;
the third lens and the fourth lens are glued with each other; the tenth lens and the eleventh lens are glued with each other; the twelfth lens and the thirteenth lens are glued with each other;
The optical imaging lens has the lenses with refractive index only from the first lens to the fourteenth lens.
Further, the seventh lens and the eighth lens are cemented with each other.
Further, the optical imaging lens further satisfies the following conditions: vd7 is less than or equal to 30, vd8 is more than or equal to 65, |vd7-vd8| >35; vd10 is less than or equal to 30, vd11 is more than or equal to 60, |vd10-vd11| >35; vd13 is less than or equal to 25, vd12 is more than or equal to 65, |vd12-vd13| >40, wherein vd7 is an abbe number of the seventh lens, vd8 is an abbe number of the eighth lens, vd10 is an abbe number of the tenth lens, vd11 is an abbe number of the eleventh lens, vd12 is an abbe number of the twelfth lens, and vd13 is an abbe number of the thirteenth lens.
Further, the optical imaging lens further satisfies: vd3 is less than or equal to 25, vd4 is less than or equal to 55, and |vd3-Vd4| >30, wherein Vd3 is the dispersion coefficient of the third lens, and Vd4 is the dispersion coefficient of the fourth lens.
Further, the optical imaging lens further satisfies: nd5>1.95, wherein nd5 is the refractive index of the fifth lens.
Further, the optical imaging lens further satisfies: nd6 is equal to or greater than 1.9, nd14 is equal to or greater than 1.9, wherein nd6 and nd14 are refractive indexes of the sixth lens and the fourteenth lens respectively, and relative partial dispersion of the sixth lens and the fourteenth lens is greater than 0.63.
Further, the optical imaging lens further satisfies: 0.75< |R111/R122| <0.85, wherein R111 is the radius of curvature of the object-side surface of the eleventh lens element and R122 is the radius of curvature of the image-side surface of the twelfth lens element.
Further, the optical imaging lens is assembled with the camera in a matching way through the base, the back focal length change quantity of the base caused by high temperature or low temperature is delta BFL1, the back focal length change quantity of the first lens to the fourteenth lens and the air interval between the first lens and the fourteenth lens caused by high temperature or low temperature is delta BFL2, and the requirements of delta BFL 1-delta BFL2 = 0 are met.
Further, the refractive index temperature coefficients of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the tenth lens, the eleventh lens, the thirteenth lens and the fourteenth lens are positive, the refractive index temperature coefficients of the eighth lens, the ninth lens and the twelfth lens are negative, and the |Δbfl3 > - Δbfl4 is satisfied, wherein Δbfl3 is the back focal length change amount of the second lens, the third lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the twelfth lens and the thirteenth lens due to high temperature or low temperature, and Δbfl4 is the back focal length change amount of the first lens, the fourth lens, the fifth lens, the sixth lens, the eleventh lens and the fourteenth lens due to high temperature or low temperature.
Further, the eleventh lens is directly supported on the twelfth lens.
The beneficial technical effects of the invention are as follows:
The invention adopts fourteen lenses, and has high resolution and high pixels through the arrangement design of the refractive index and the surface shape of each lens; the whole system is optimized without heating, is focused at normal temperature, and has little or no defocus at high and low temperatures; the image surface is larger; the light transmission is large, more light entering quantity can be obtained, and the shot picture is brighter; the CRA chief ray incidence angle is smaller, and the CRA chief ray incidence angle is matched with a Sensor (Sensor) of a smaller CRA, so that the problems of dark edges and color cast are avoided.
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 showing MTF at room temperature (25 ℃ C.) of 0.435-0.656 μm according to example I of the present invention;
FIG. 3 is a graph showing MTF at low temperature (-40 ℃) of 0.435-0.656 μm for example of the invention;
FIG. 4 is a graph showing MTF at high temperature (80 ℃ C.) of 0.435-0.656 μm in accordance with the embodiment of the present invention;
FIG. 5 is a fan-shaped diagram of a first embodiment of the present invention;
FIG. 6 is a schematic diagram of a graph of lateral chromatic aberration in accordance with a first embodiment of the present invention;
FIG. 7 is a graph showing MTF at room temperature (25 ℃ C.) of 0.435-0.656 μm in example II of the invention;
FIG. 8 is a graph showing MTF at low temperature (-40 ℃) of 0.435-0.656 μm for example II of the invention;
FIG. 9 is a graph of MTF at high temperature (80 ℃ C.) of 0.435-0.656 μm for example II of the present invention;
FIG. 10 is a fan-shaped diagram of a second embodiment of the present invention;
FIG. 11 is a schematic diagram of a graph of lateral chromatic aberration in accordance with a second embodiment of the present invention;
FIG. 12 is a graph showing MTF at room temperature (25 ℃) of 0.435 to 0.656 μm for example III of the invention;
FIG. 13 is a graph of MTF at low temperature (-40 ℃) of 0.435-0.656 μm for example III of the invention;
FIG. 14 is a graph of MTF at 0.435-0.656 μm at high temperature (80 ℃) for example of the invention;
FIG. 15 is a sector diagram of a third embodiment of the present invention;
FIG. 16 is a schematic diagram showing a graph of lateral chromatic aberration in accordance with a third embodiment of the present invention;
FIG. 17 is a graph showing MTF at room temperature (25 ℃) of 0.435 to 0.656 μm in example four of the invention;
FIG. 18 is a graph of MTF at low temperature (-40 ℃) of 0.435-0.656 μm for example IV of the invention;
FIG. 19 is a graph showing MTF at high temperature (80 ℃ C.) of 0.435 to 0.656 μm in example IV of the present invention;
FIG. 20 is a fan-shaped view of a fourth embodiment of the present invention;
FIG. 21 is a schematic diagram showing a graph of lateral chromatic aberration in accordance with a fourth embodiment 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)" as used herein 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 table (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 with large light transmission and large image surface, which sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side along an optical axis; the first lens element to the fourteenth lens element each comprise an object side surface facing the object side and passing the image light beam therethrough, and an image side surface facing the image side and passing the image light beam 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 convex 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 concave surface, and the image side surface of the third lens is a concave surface.
The fourth lens element has positive refractive index, wherein an object-side surface of the fourth lens element is convex, and an image-side surface of the fourth lens element is convex.
The fifth lens element has positive refractive index, wherein an object-side surface of the fifth lens element is a plane, and an image-side surface of the fifth lens element is a convex surface.
The sixth lens element has positive refractive index, wherein an object-side surface of the sixth lens element is convex, 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 eighth lens element has positive refractive index, wherein an object-side surface of the eighth lens element is convex, and an image-side surface of the eighth lens element is convex.
The ninth lens element has positive refractive index, wherein an object-side surface of the ninth lens element is convex, and an image-side surface of the ninth lens element is convex.
The tenth lens has negative 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 eleventh lens has positive refractive index, the object side surface of the eleventh lens is a convex surface, and the image side surface of the eleventh lens is a concave surface.
The twelfth lens element has positive refractive index, wherein an object-side surface of the twelfth lens element is a plane, and an image-side surface of the twelfth lens element is a convex surface.
The thirteenth lens element has negative refractive power, wherein the object-side surface of the thirteenth lens element is concave, and the image-side surface of the thirteenth lens element is convex.
The fourteenth lens element has positive refractive index, wherein an object-side surface of the fourteenth lens element is convex, and an image-side surface of the fourteenth lens element is planar.
The third lens and the fourth lens are glued with each other; the tenth lens and the eleventh lens are glued with each other; the twelfth lens and the thirteenth lens are glued with each other; the optical imaging lens has the lenses with refractive index only from the first lens to the fourteenth lens.
The invention adopts fourteen lenses, and has high resolution and high pixels through the arrangement design of the refractive index and the surface shape of each lens; the whole system is optimized without heating, is focused at normal temperature, and has little or no defocus at high and low temperatures; the image surface is larger; the light transmission is large, more light entering quantity can be obtained, and the shot picture is brighter; the CRA chief ray incidence angle is smaller, and the CRA chief ray incidence angle is matched with a Sensor (Sensor) of a smaller CRA, so that the problems of dark edges and color cast are avoided.
Preferably, the seventh lens and the eighth lens are cemented with each other, further achromatized.
More preferably, the optical imaging lens further satisfies: vd7 is less than or equal to 30, vd8 is more than or equal to 65, |vd7-vd8| >35; vd10 is less than or equal to 30, vd11 is more than or equal to 60, |vd10-vd11| >35; vd13 is less than or equal to 25, vd12 is more than or equal to 65, |vd12-vd13| >40, wherein vd7 is the dispersion coefficient of the seventh lens, vd8 is the dispersion coefficient of the eighth lens, vd10 is the dispersion coefficient of the tenth lens, vd11 is the dispersion coefficient of the eleventh lens, vd12 is the dispersion coefficient of the twelfth lens, and vd13 is the dispersion coefficient of the thirteenth lens, so that chromatic aberration is further corrected, image quality is optimized, and system performance is improved.
Preferably, the optical imaging lens further satisfies: vd3 is less than or equal to 25, vd4 is more than or equal to 55, and |vd3-Vd4| >30, wherein Vd3 is the dispersion coefficient of the third lens, and Vd4 is the dispersion coefficient of the fourth lens, so that chromatic aberration is further corrected, image quality is optimized, and system performance is improved.
Preferably, the optical imaging lens further satisfies: nd5>1.95, wherein nd5 is the refractive index of the fifth lens, which is favorable for reducing the turning angle of the marginal ray of the central view field and reducing the sensitivity of the central view field.
Preferably, the optical imaging lens further satisfies: nd6 is equal to or greater than 1.9, nd14 is equal to or greater than 1.9, wherein nd6 and nd14 are refractive indexes of the sixth lens and the fourteenth lens respectively, and relative partial dispersion of the sixth lens and the fourteenth lens is greater than 0.63, so that further achromatization is realized.
Preferably, the optical imaging lens further satisfies: 0.75< |R111/R122| <0.85, wherein R111 is the radius of curvature of the object side of the eleventh lens, and R122 is the radius of curvature of the image side of the twelfth lens, further optimizing spherical aberration.
Preferably, the optical imaging lens is assembled with the camera in a matching way through the base, the back focal length variation of the base caused by high temperature or low temperature is delta BFL1, the back focal length variation of the first lens to the fourteenth lens and the air interval between the first lens and the fourteenth lens caused by high temperature or low temperature is delta BFL2, delta BFL 1-delta BFL 2=0 is met, the defocus at high temperature and low temperature is further reduced, normal temperature focusing is achieved, the high temperature and low temperature are not defocus, namely the optical imaging lens and the camera are athermalized, and the imaging system is clear at normal temperature and high temperature and low temperature.
More preferably, the base is made of an aluminum material having a linear expansion coefficient of 23.6E-06, advantageously achieving ΔBFL1- ΔBF2=0, reducing process difficulty, although in some embodiments the base may be made of a plastic or other material having a linear expansion coefficient of 23.6E-06 or near 23.6E-06.
More preferably, the lens further comprises a spacer ring arranged between the first lens and the fourteenth lens, and the spacer ring is made of an aluminum material with a linear expansion coefficient of 23.6E-06, so that ΔBFL1- ΔBFL2=0 is realized, and the process difficulty is reduced.
More preferably, the refractive index temperature coefficients of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the tenth lens, the eleventh lens, the thirteenth lens and the fourteenth lens are positive, the refractive index temperature coefficients of the eighth lens, the ninth lens and the twelfth lens are negative, and the |Δbfl3 is satisfied, Δbfl4| where Δbfl3 is the back focal length change amount of the second lens, the third lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the twelfth lens and the thirteenth lens caused by high temperature or low temperature, Δbfl4 is the back focal length change amount of the first lens, the fourth lens, the fifth lens, the sixth lens, the eleventh lens and the fourteenth lens caused by high temperature or low temperature, and the Δbfl1- Δbfl2=0 is more favorable for realizing the process difficulty reduction.
Preferably, the eleventh lens is directly supported on the twelfth lens, the interval can be controlled to be 0.01mm, and the tolerance support of the structural design is good.
The following describes the optical imaging lens with large light transmission and large image plane according to the present invention in detail with specific embodiments.
Example 1
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 fifth lens 5, a stop 150, a sixth lens 6, a seventh lens 7, an eighth lens 8, a ninth lens 9, a tenth lens 100, an eleventh lens 110, a twelfth lens 120, a thirteenth lens 130, a fourteenth lens 140, a protective sheet 160, and an imaging plane 170; the first lens element 1 to the fourteenth lens element 140 each comprise an object side surface facing the object side A1 and passing the imaging light and an image side surface facing the image side A2 and passing the imaging light.
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 convex.
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 concave, and an image-side surface 32 of the third lens element 3 is concave.
The fourth lens element 4 has a positive refractive power, wherein an object-side surface 41 of the fourth lens element 4 is convex, and an image-side surface 42 of the fourth lens element 4 is convex.
The fifth lens element 5 has a 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 has a positive refractive power, wherein an object-side surface 61 of the sixth lens element 6 is convex, and an image-side surface 62 of the sixth lens element 6 is convex.
The seventh lens element 7 has a negative refractive power, wherein an object-side surface 71 of the seventh lens element 7 is concave, and an image-side surface 72 of the seventh lens element 7 is concave.
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 convex, and an image-side surface 92 of the ninth lens element 9 is convex.
The tenth lens element 100 has a negative refractive power, wherein an object-side surface 101 of the tenth lens element 100 is convex, and an image-side surface 102 of the tenth lens element 100 is concave.
The eleventh lens element 110 has a positive refractive index, wherein an object-side surface 111 of the eleventh lens element 110 is convex, and an image-side surface 112 of the eleventh lens element 110 is concave.
The twelfth lens element 120 has a positive refractive index, wherein an object-side surface 121 of the twelfth lens element 120 is a plane, and an image-side surface 122 of the twelfth lens element 120 is a convex surface.
The thirteenth lens element 130 has a negative refractive power, wherein an object-side surface 131 of the thirteenth lens element 130 is concave, and an image-side surface 132 of the thirteenth lens element 130 is convex.
The fourteenth lens element 140 has a positive refractive index, wherein an object-side surface 141 of the fourteenth lens element 140 is convex, and an image-side surface 142 of the fourteenth lens element 140 is planar.
The third lens 3 and the fourth lens 4 are glued to each other; the seventh lens 7 and the eighth lens 8 are glued to each other; the tenth lens 100 and the eleventh lens 110 are cemented with each other; the twelfth lens 120 and the thirteenth lens 130 are cemented with each other.
In this embodiment, the refractive index temperature coefficients of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, the tenth lens 100, the eleventh lens 110, the thirteenth lens 130 and the fourteenth lens 140 are positive, the refractive index temperature coefficients of the eighth lens 8, the ninth lens 9 and the twelfth lens 120 are negative, and the |Δbfl3| > |Δbfl4| is satisfied.
In this embodiment, the optical imaging lens further includes a mount (not shown) assembled by matching the mount with the camera, the mount is made of an aluminum material having a linear expansion coefficient of 23.6E-06, the spacer provided between the first lens 1 to the fourteenth lens 140 is also made of an aluminum material having a linear expansion coefficient of 23.6E-06, the mount has a back focal length change amount Δbfl1 due to high temperature or low temperature, and the first lens 1 to the fourteenth lens 140 and the air interval therebetween have a back focal length change amount Δbfl2 due to high temperature or low temperature, satisfying Δbfl1 to Δbfl2=0.
In the present embodiment, the diaphragm 150 is disposed between the fifth lens 5 and the sixth lens 6, so that the coaxiality is better, and the process sensitivity is reduced, but is not limited thereto.
In this embodiment, the eleventh lens 110 is directly supported on the twelfth lens 120
The detailed optical data of this particular example are shown in Table 1-1.
Table 1-1 detailed optical data for example one
The values of the related conditional expressions of this embodiment are shown in table 5.
2-4, It can be seen from the figure that the transfer function is well controlled, the resolution is high, the resolution of the whole field of view can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperature is almost not out of focus; referring to fig. 5, the lateral color difference diagram is shown in fig. 6, and it can be seen that the color difference and the aberration are small, and the imaging quality is good.
In this embodiment, the focal length f=16.2 mm, the aperture value fno=1.05, the image plane diameter Φ=17.6 mm, the field angle fov=60°, and the chief ray incidence angle cra=10.24 of the optical imaging lens.
Example 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 values of the related conditional expressions of this embodiment are shown in table 5.
7-9, It can be seen from the figure that the transfer function is well controlled, the resolution is high, the resolution of the whole field of view can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperature is almost not out of focus; referring to fig. 10, the lateral color difference diagram is shown in fig. 11, and it can be seen that the color difference and the aberration are small, and the imaging quality is good.
In this embodiment, the focal length f=16.2 mm, the aperture value fno=1.05, the image plane diameter Φ=17.6 mm, the field angle fov=60°, and the chief ray incidence angle cra=10.2 of the optical imaging lens.
Example III
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
The values of the related conditional expressions of this embodiment are shown in table 5.
With reference to fig. 12-14, it can be seen from the figure that the resolution of the embodiment is high, the resolution of the full field of view can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperature is almost not out of focus; referring to fig. 15 for the fan-shaped image, the lateral color difference chart is shown in fig. 16, and it can be seen that the color difference and the aberration are small, and the imaging quality is good.
In this embodiment, the focal length f=16.2 mm, the aperture value fno=1.05, the image plane diameter Φ=17.6 mm, the field angle fov=60°, and the chief ray incidence angle cra=10.1 of the optical imaging lens.
Example IV
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
The values of the related conditional expressions of this embodiment are shown in table 5.
17-19, It can be seen from the figure that the transfer function is well controlled, the resolution is high, the resolution of the whole field of view can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperature is almost not out of focus; referring to fig. 20, the lateral color difference diagram is shown in fig. 21, and it can be seen that the color difference and the aberration are small, and the imaging quality is good.
In this embodiment, the focal length f=16.2 mm, the aperture value fno=1.05, the image plane diameter Φ=17.6 mm, the field angle fov=60°, and the chief ray incidence angle cra=10.16 of the optical imaging lens.
Table 5 values of relevant important parameters for four embodiments of the present invention
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 with large light transmission and large image surface is characterized in that: the lens system comprises a first lens, a second lens, a third lens and a fourth lens, wherein the first lens, the second lens and the fourth lens are sequentially arranged from an object side to an image side along an optical axis; the first lens element to the fourteenth 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 convex 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 concave surface, and the image side surface of the third lens is a concave surface;
The fourth lens has positive refractive index, the object side surface of the fourth lens is a convex surface, and the image side surface of the fourth lens is a convex surface;
the fifth lens has positive refractive index, the object side surface of the fifth lens is a plane, and the image side surface of the fifth lens is a convex surface;
the sixth lens element has positive refractive index, wherein the object-side surface of the sixth lens element is convex, and the image-side surface of the sixth lens element is convex;
The seventh lens has negative refractive index, 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 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 element has positive refractive index, wherein the object-side surface of the ninth lens element is convex, and the image-side surface of the ninth lens element is convex;
The tenth lens has negative 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 eleventh lens has positive refractive index, the object side surface of the eleventh lens is a convex surface, and the image side surface of the eleventh lens is a concave surface;
the twelfth lens has positive refractive index, the object side surface of the twelfth lens is a plane, and the image side surface of the twelfth lens is a convex surface;
the thirteenth lens has negative refractive index, the object side surface of the thirteenth lens is a concave surface, and the image side surface of the thirteenth lens is a convex surface;
The fourteenth lens element has positive refractive index, wherein the object-side surface of the fourteenth lens element is convex, and the image-side surface of the fourteenth lens element is planar;
The third lens and the fourth lens are glued with each other; the tenth lens and the eleventh lens are glued with each other; the twelfth lens and the thirteenth lens are glued with each other; the seventh lens and the eighth lens are glued with each other;
The optical imaging lens has the lenses with refractive index only from the first lens to the fourteenth lens;
The optical imaging lens satisfies the following conditions: nd6 is equal to or greater than 1.9, nd14 is equal to or greater than 1.9, wherein nd6 and nd14 are refractive indexes of the sixth lens and the fourteenth lens respectively, and relative partial dispersion of the sixth lens and the fourteenth lens is greater than 0.63.
2. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein the optical imaging lens further satisfies: vd7 is less than or equal to 30, vd8 is more than or equal to 65, |vd7-vd8| >35; vd10 is less than or equal to 30, vd11 is more than or equal to 60, |vd10-vd11| >35; vd13 is less than or equal to 25, vd12 is more than or equal to 65, |vd12-vd13| >40, wherein vd7 is an abbe number of the seventh lens, vd8 is an abbe number of the eighth lens, vd10 is an abbe number of the tenth lens, vd11 is an abbe number of the eleventh lens, vd12 is an abbe number of the twelfth lens, and vd13 is an abbe number of the thirteenth lens.
3. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein the optical imaging lens further satisfies: vd3 is less than or equal to 25, vd4 is less than or equal to 55, and |vd3-Vd4| >30, wherein Vd3 is the dispersion coefficient of the third lens, and Vd4 is the dispersion coefficient of the fourth lens.
4. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein the optical imaging lens further satisfies: nd5>1.95, wherein nd5 is the refractive index of the fifth lens.
5. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein the optical imaging lens further satisfies: 0.75< |R111/R122| <0.85, wherein R111 is the radius of curvature of the object-side surface of the eleventh lens element and R122 is the radius of curvature of the image-side surface of the twelfth lens element.
6. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein: the optical imaging lens is matched and assembled with the camera through the base, the back focal length variation of the base caused by high temperature or low temperature is delta BFL1, the back focal length variation of the first to fourteenth lenses and the air interval between the first to fourteenth lenses caused by high temperature or low temperature is delta BFL2, and delta BFL 1-delta BFL2 = 0 is met.
7. The optical imaging lens with large light transmission and large image plane according to claim 6, wherein: the refractive index temperature coefficients of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens, the tenth lens, the eleventh lens, the thirteenth lens and the fourteenth lens are positive, the refractive index temperature coefficients of the eighth lens, the ninth lens and the twelfth lens are negative, and the delta BFL 3-delta BFL 4-delta BFL3 is satisfied, wherein delta BFL3 is the back focal length variation of the second lens, the third lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, the twelfth lens and the thirteenth lens caused by high temperature or low temperature, and delta BFL4 is the back focal length variation of the first lens, the fourth lens, the fifth lens, the sixth lens, the eleventh lens and the fourteenth lens caused by high temperature or low temperature.
8. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein: the eleventh lens is directly supported on the twelfth lens.
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