CN212433490U

CN212433490U - Optical imaging lens with large light transmission and large image surface

Info

Publication number: CN212433490U
Application number: CN202021469693.6U
Authority: CN
Inventors: 曹来书; 苏炳坤; 李雪慧
Original assignee: Xiamen Leading Optics Co Ltd
Current assignee: Xiamen Leading Optics Co Ltd
Priority date: 2020-07-23
Filing date: 2020-07-23
Publication date: 2021-01-29
Anticipated expiration: 2030-07-23

Abstract

The utility model relates to a camera lens technical field. The utility model discloses an optical imaging lens with large light transmission and large image surface, which comprises fourteen lenses; the first lens, the fourth lens, the sixth lens, the eighth lens and the ninth lens 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 element and the seventh lens element 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 element is a concave lens element with negative refractive power; the fourteenth lens element is a convex-flat lens element with positive refractive index; the third lens and the fourth lens are mutually glued; the tenth lens and the eleventh lens are mutually glued; the twelfth lens and the thirteenth lens are cemented with each other. The utility model has high resolution and good imaging quality; the image surface is large; the light transmission is large; the high and low temperature coke loss is small or no coke loss; the incident angle of CRA chief rays.

Description

Optical imaging lens with large light transmission and large image surface

Technical Field

The utility model belongs to the technical field of the camera lens, specifically relate to an optical imaging camera lens of big image planes of big light transmission.

Background

With the continuous progress of scientific technology and the continuous development of society, in recent years, optical imaging lenses are also rapidly developed and widely applied to various fields such as smart phones, tablet computers, video conferences, vehicle-mounted monitoring, security monitoring, machine vision, intelligent traffic systems and the like, so that the requirements on the optical imaging lenses are higher and higher.

In an intelligent traffic system, the performance of an optical imaging lens is critical, and the reliability of the whole system is affected. However, the optical imaging lens applied to the intelligent traffic system at present has low resolution and low pixel; when the coke is used in high and low temperature environments, the coke loss is serious; the image surface is smaller at a 16mm focal length section, and generally only reaches phi 16 mm; the light passing is generally small, the light inlet quantity is small in a low-light environment, and a shot picture is dark; in a larger image plane, the main ray incident angle of the CRA is larger than 12 degrees, and the main ray incident angle is matched with a Sensor (Sensor) of a smaller CRA, so that the problems of edge darkness and color cast are easily caused, the increasing requirements of an intelligent traffic system cannot be met, and the improvement is urgently needed.

Disclosure of Invention

An object of the utility model is to provide an optical imaging lens of big image planes of light passing is used for solving the technical problem that the above-mentioned exists.

In order to achieve the above object, the utility model adopts the following technical scheme: an optical imaging lens with large light transmission and large image plane sequentially comprises a first lens, a second lens, a third lens, a fourth lens and a fifth lens from an object side to an image side along an optical axis; the first lens element to the fourteenth lens element respectively comprise an object side surface facing the object side and allowing the imaging light to pass and an image side surface facing the image side and allowing the imaging light to pass;

the first lens element with positive refractive index has a convex object-side surface and a convex image-side surface;

the second lens element with negative refractive index has a convex object-side surface and a concave image-side surface;

the third lens element with negative refractive index has a concave object-side surface and a concave image-side surface;

the fourth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;

the fifth lens element with positive refractive index has a planar object-side surface and a convex image-side surface;

the sixth lens element with positive refractive index has a convex object-side surface and a convex image-side surface;

the seventh lens element with negative refractive index has a concave object-side surface and a concave image-side surface;

the eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface;

the ninth lens element with positive refractive power has a convex object-side surface and a convex image-side surface;

the tenth lens element with negative refractive power has a convex object-side surface and a concave image-side surface;

the eleventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface;

the twelfth lens element with a positive refractive index has a planar object-side surface and a convex image-side surface;

the thirteenth lens element with a negative refractive index has a concave object-side surface and a convex image-side surface;

the fourteenth lens element has a positive refractive index, and has a convex object-side surface and a planar image-side surface;

the third lens and the fourth lens are mutually glued; the tenth lens and the eleventh lens are mutually glued; the twelfth lens and the thirteenth lens are mutually glued;

the optical imaging lens has only the first lens to the fourteenth lens.

Further, the seventh lens and the eighth lens are cemented to each other.

Furthermore, 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 not more than 25, vd12 is not less than 65, | vd12-vd13| >40, wherein vd7 is the abbe number of the seventh lens, vd8 is the abbe number of the eighth lens, vd10 is the abbe number of the tenth lens, vd11 is the abbe number of the eleventh lens, vd12 is the abbe number of the twelfth lens, and vd13 is the abbe number of the thirteenth lens.

Further, the optical imaging lens further satisfies the following conditions: vd3 is less than or equal to 25, Vd4 is more than or equal to 55, and | Vd3-Vd4| is >30, wherein Vd3 is the abbe number of the third lens, and Vd4 is the abbe number of the fourth lens.

Further, the optical imaging lens further satisfies the following conditions: nd5>1.95, where nd5 is the refractive index of the fifth lens.

Further, the optical imaging lens further satisfies the following conditions: nd6 is more than or equal to 1.9, nd14 is more than or equal to 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 more than 0.63.

Further, the optical imaging lens further satisfies the following conditions: 0.75< | R111/R122| <0.85, where R111 is a radius of curvature of an object-side surface of the eleventh lens and R122 is a radius of curvature of an image-side surface of the twelfth lens.

Further, 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 space between the first to fourteenth lenses caused by high temperature or low temperature is delta BFL2, and delta BFL 1-delta BFL2 is 0.

Furthermore, the temperature coefficients of the refractive indexes 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 all positive, the temperature coefficients of the refractive indexes of the eighth lens, the ninth lens and the twelfth lens are all negative, and satisfy |. Δ BFL3 |. Δ BFL 4|, wherein Δ BFL3 is a back focal length variation 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 Δ BFL4 is a back focal length variation 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 bears directly against the twelfth lens.

The utility model has the advantages of:

the utility model adopts fourteen lens elements, and has high resolution and high pixel by the arrangement design of the refractive index and the surface shape of each lens element; the whole system is optimized without heating, the focusing is carried out at normal temperature, and the high and low temperature defocusing is small or not defocusing; the image surface is larger; the light transmission is large, more light entering quantity can be obtained, and the picture of the shot picture is brighter; the main ray incidence angle of the CRA is small, and the Sensor (Sensor) is matched with the Sensor (Sensor) of the small CRA, so that the problems of dark edge and color cast are avoided.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a graph of MTF of 0.435-0.656 μm at room temperature (25 ℃ C.) according to an embodiment of the present invention;

FIG. 3 is a graph of MTF of 0.435-0.656 μm at low temperature (-40 ℃ C.) according to an embodiment of the present invention;

FIG. 4 is a graph of MTF of 0.435-0.656 μm at a high temperature (80 ℃ C.) according to an embodiment of the present invention;

fig. 5 is a sector view of a first embodiment of the present invention;

fig. 6 is a schematic diagram of a lateral chromatic aberration curve according to a first embodiment of the present invention;

FIG. 7 is a graph of MTF of 0.435-0.656 μm at room temperature (25 ℃ C.) according to example II of the present invention;

FIG. 8 is a graph of MTF of 0.435-0.656 μm at low temperature (-40 ℃ C.) according to example II of the present invention;

FIG. 9 is a graph of MTF of 0.435-0.656 μm at high temperature (80 ℃ C.) according to example II of the present invention;

fig. 10 is a sector view of a second embodiment of the present invention;

fig. 11 is a schematic diagram of a lateral chromatic aberration curve according to a second embodiment of the present invention;

FIG. 12 is a graph of MTF of 0.435-0.656 μm at three normal temperatures (25 ℃ C.) in accordance with an embodiment of the present invention;

FIG. 13 is a graph of MTF of 0.435-0.656 μm at low temperature (-40 ℃ C.) in accordance with example III of the present invention;

FIG. 14 is a graph of MTF of 0.435-0.656 μm at three high temperatures (80 ℃ C.) in accordance with an embodiment of the present invention;

fig. 15 is a sector view of a third embodiment of the present invention;

fig. 16 is a schematic diagram of a lateral chromatic aberration curve according to a third embodiment of the present invention;

FIG. 17 is a graph of MTF of 0.435-0.656 μm at four normal temperatures (25 ℃ C.) in accordance with an embodiment of the present invention;

FIG. 18 is a graph of MTF of 0.435-0.656 μm at low temperature (-40 ℃ C.) according to example four of the present invention;

FIG. 19 is a graph of MTF of 0.435-0.656 μm at four high temperatures (80 ℃ C.) according to example of the present invention;

fig. 20 is a sector view of a fourth embodiment of the present invention;

fig. 21 is a schematic diagram of a lateral chromatic aberration curve according to a fourth embodiment of the present invention;

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As used herein, the term "a lens element having a positive refractive index (or a negative refractive index)" means that the paraxial refractive index of the lens element calculated by Gaussian optics 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 determination of the surface shape of the lens can be performed by the judgment method of a person skilled in the art, i.e., by the sign of the curvature radius (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 lens data sheets (lens data sheets) of optical design software. When the R value is positive, the object side is judged to be a convex surface; and when the R value is negative, judging that the object side surface is a concave surface. On the contrary, regarding the image side surface, when the R value is positive, the image side surface is judged to be a concave surface; when the R value is negative, the image side surface is judged to be convex.

The utility model provides an optical imaging lens with large light transmission and large image surface, which comprises a first lens to a fourteenth lens from an object side to an image side along an optical axis in sequence; the first lens element to the fourteenth lens element each include an object-side surface facing the object side and passing the imaging light and an image-side surface facing the image side and passing the imaging light.

The first lens element with positive refractive index has a convex object-side surface and a convex image-side surface.

The second lens element with negative refractive index has a convex object-side surface and a concave image-side surface.

The third lens element with negative refractive index has a concave object-side surface and a concave image-side surface.

The fourth lens element with positive refractive power has a convex object-side surface and a convex image-side surface.

The fifth lens element with positive refractive power has a planar object-side surface and a convex image-side surface.

The sixth lens element with positive refractive power has a convex object-side surface and a convex image-side surface.

The seventh lens element with negative refractive index has a concave object-side surface and a concave image-side surface.

The eighth lens element with positive refractive power has a convex object-side surface and a convex image-side surface.

The ninth lens element with positive refractive power has a convex object-side surface and a convex image-side surface.

The tenth lens element with negative refractive power has a convex object-side surface and a concave image-side surface.

The eleventh lens element with positive refractive power has a convex object-side surface and a concave image-side surface.

The twelfth lens element with a positive refractive index has a planar object-side surface and a convex image-side surface.

The thirteenth lens element with a negative refractive index has a concave object-side surface and a convex image-side surface.

The fourteenth lens element has a positive refractive index, and has a convex object-side surface and a planar image-side surface.

The third lens and the fourth lens are mutually glued; the tenth lens and the eleventh lens are mutually glued; the twelfth lens and the thirteenth lens are mutually glued; the optical imaging lens has only the first lens to the fourteenth lens.

Preferably, the seventh lens and the eighth lens are cemented to each other and 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, further correcting chromatic aberration, optimizing image quality and improving system performance.

Preferably, the optical imaging lens further satisfies: vd3 is not more than 25, Vd4 is not less than 55, and | Vd3-Vd4| is >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 beneficial to reducing the turning angle of the marginal rays of the central visual field and reducing the sensitivity of the central visual field.

Preferably, the optical imaging lens further satisfies: nd6 is more than or equal to 1.9, nd14 is more than or equal to 1.9, nd6 and nd14 are refractive indexes of the sixth lens and the fourteenth lens respectively, relative partial dispersion of the sixth lens and the fourteenth lens is more than 0.63, and further achromatization is realized.

Preferably, the optical imaging lens further satisfies: 0.75< | R111/R122| <0.85, where R111 is the radius of curvature of the object-side surface of the eleventh lens and R122 is the radius of curvature of the image-side surface of the twelfth lens, further optimizes spherical aberration.

Preferably, 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 Δ BFL1, the back focal length variation of the first to fourteenth lenses and the air space between the first to fourteenth lenses caused by high temperature or low temperature is Δ BFL2, Δ BFL1- Δ BFL2 is 0, and the defocus at high and low temperature is further reduced, so that normal temperature focusing is performed, and high and low temperature focusing is not performed, that is, the optical imaging lens and the camera are a non-heating system, and the imaging system is clear under normal temperature and high and low temperature conditions.

More preferably, the base is made of aluminum material with a linear expansion coefficient of 23.6E-06, which is beneficial to achieve Δ BFL1- Δ BFL2 being 0, and reduces the difficulty of the process, and of course, in some embodiments, the base may be made of plastic or other materials with a linear expansion coefficient of 23.6E-06 or close to 23.6E-06.

More preferably, the lens further comprises a spacer ring arranged between the first lens and the fourteenth lens, wherein the spacer ring is made of an aluminum material with a linear expansion coefficient of 23.6E-06, and Δ BFL1- Δ BFL2 is more favorably realized to be 0, so that the process difficulty is reduced.

More preferably, the temperature coefficients of the refractive indexes 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 all positive, the temperature coefficients of the refractive indexes of the eighth lens, the ninth lens and the twelfth lens are all negative, and satisfy |. Δ BFL3 |. Δ BFL 4|, wherein Δ BFL3 is a change in back focal length 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 Δ BFL4 is a change in back focal length 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, which is more beneficial to achieving Δ BFL1- Δ BFL2 being 0, and reducing process difficulty.

Preferably, the eleventh lens directly bears against the twelfth lens, and the spacing can be controlled at 0.01mm, providing a good tolerance support for the structural design.

The optical imaging lens with large light transmission and large image plane of the present invention will be described in detail with specific embodiments.

Example one

As shown in fig. 1, an optical imaging lens includes, in order along an optical axis I from an object side a1 to an image side a2, 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 image plane 170; the first lens element 1 to the fourteenth lens element 140 each include an object-side surface facing the object side a1 and passing the image light, and an image-side surface facing the image side a2 and passing the image light.

The first lens element 1 has a positive refractive index, and an object-side surface 11 and an image-side surface 12 of the first lens element 1 are convex and substantially parallel to each other.

The second lens element 2 has a negative refractive index, and 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 index, and 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 index, and an object-side surface 41 and an image-side surface 42 of the fourth lens element 4 are convex and substantially parallel to each other.

The fifth lens element 5 has a positive refractive index, the object-side surface 51 of the fifth lens element 5 is a plane, and the image-side surface 52 of the fifth lens element 5 is a convex surface.

The sixth lens element 6 has a positive refractive index, and 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 index, and 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 index, and 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 index, and 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 with negative refractive power has a convex object-side surface 101 of the tenth lens element 100 and a concave image-side surface 102 of the tenth lens element 100.

The eleventh lens element 110 has a positive refractive index, and 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, and an object-side surface 121 of the twelfth lens element 120 is a planar surface 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 index, and 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, 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 mutually glued; the seventh lens 7 and the eighth lens 8 are cemented with each other; the tenth lens 100 and the eleventh lens 110 are cemented to each other; the twelfth lens 120 and the thirteenth lens 130 are cemented with each other.

In the present embodiment, the temperature coefficients of the refractive indices of the first lens element 1, the second lens element 2, the third lens element 3, the fourth lens element 4, the fifth lens element 5, the sixth lens element 6, the seventh lens element 7, the tenth lens element 100, the eleventh lens element 110, the thirteenth lens element 130 and the fourteenth lens element 140 are all positive, the temperature coefficients of the refractive indices of the eighth lens element 8, the ninth lens element 9 and the twelfth lens element 120 are all negative, and satisfy the |. Δ BFL 3| >. Δ BFL4 |.

In the present embodiment, the optical imaging lens further includes a base (not shown in the drawing), the optical imaging lens is assembled with the camera by matching the base, the base is made of an aluminum material having a coefficient of linear expansion of 23.6E-06, the spacer disposed between the first lens 1 to the fourteenth lens 140 is also made of an aluminum material having a coefficient of linear expansion of 23.6E-06, the base has a back focal length variation Δ BFL1 due to a high temperature or a low temperature, and the back focal length variation Δ BFL2 due to a high temperature or a low temperature is provided by the first lens 1 to the fourteenth lens 140 and an air space therebetween, and Δ BFL1- Δ BFL2 is 0.

In this 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 bears directly on the twelfth lens 120

The detailed optical data of this embodiment are shown in Table 1-1.

Table 1-1 detailed optical data for example one

Please refer to table 5 for the values of the conditional expressions related to this embodiment.

Referring to fig. 2-4, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, the resolution of the full view field can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperatures hardly lose focus; referring to fig. 5, a transverse chromatic aberration diagram is shown in detail in fig. 6, which shows that the chromatic aberration and the aberration are small, and the imaging quality is good.

In this embodiment, the focal length f of the optical imaging lens is 16.2mm, the aperture value FNO is 1.05, the image plane diameter Φ is 17.6mm, the field angle FOV is 60 °, and the chief ray angle CRA is 10.24.

Example two

In this embodiment, the surface convexoconcave and the refractive index of each lens are the same as those of the first embodiment, and only the optical parameters such as the curvature radius of the surface of each lens, the thickness of the lens, and the like are different.

The detailed optical data of this embodiment is shown in Table 2-1.

TABLE 2-1 detailed optical data for example two

Referring to fig. 7-9, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, the resolution of the full view field can reach 200lp/mm, 2000 ten thousand pixels can be supported, and almost no defocus occurs at high and low temperatures; referring to fig. 10, a transverse chromatic aberration diagram is detailed in fig. 11, which shows that the chromatic aberration and the aberration are small, and the imaging quality is good.

In this embodiment, the focal length f of the optical imaging lens is 16.2mm, the aperture value FNO is 1.05, the image plane diameter Φ is 17.6mm, the field angle FOV is 60 °, and the chief ray angle CRA is 10.2.

EXAMPLE III

The detailed optical data of this embodiment is shown in Table 3-1.

TABLE 3-1 detailed optical data for EXAMPLE III

Referring to fig. 12-14, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, the resolution of the full view field can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperatures hardly lose focus; referring to fig. 15, a transverse chromatic aberration diagram is shown in detail in fig. 16, which shows that the chromatic aberration and the aberration are small, and the imaging quality is good.

In this embodiment, the focal length f of the optical imaging lens is 16.2mm, the aperture value FNO is 1.05, the image plane diameter Φ is 17.6mm, the field angle FOV is 60 °, and the chief ray angle CRA is 10.1.

Example four

The detailed optical data of this embodiment is shown in Table 4-1.

TABLE 4-1 detailed optical data for example four

Referring to fig. 17-19, it can be seen that the resolution of the present embodiment is good for the control of the transfer function, the resolution is high, the resolution of the full view field can reach 200lp/mm, 2000 ten thousand pixels can be supported, and the high and low temperatures hardly lose focus; referring to fig. 20, a transverse chromatic aberration diagram is shown in detail in fig. 21, which shows that the chromatic aberration and the aberration are small, and the imaging quality is good.

In this embodiment, the focal length f of the optical imaging lens is 16.2mm, the aperture value FNO is 1.05, the image plane diameter Φ is 17.6mm, the field angle FOV is 60 °, and the chief ray angle CRA is 10.16.

Table 5 values of relevant important parameters of 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 detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides an optical imaging lens of big image plane of big light transmission which characterized in that: the lens comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from the object side to the image side along an optical axis; the first lens element to the fourteenth lens element respectively comprise an object side surface facing the object side and allowing the imaging light to pass and an image side surface facing the image side and allowing the imaging light to pass;

the optical imaging lens has only the first lens to the fourteenth lens.

2. The optical imaging lens with large light transmission and large image plane according to claim 1, characterized in that: the seventh lens and the eighth lens are cemented to each other.

3. The optical imaging lens with large light transmission and large image plane according to claim 2, wherein 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 not more than 25, vd12 is not less than 65, | vd12-vd13| >40, wherein vd7 is the abbe number of the seventh lens, vd8 is the abbe number of the eighth lens, vd10 is the abbe number of the tenth lens, vd11 is the abbe number of the eleventh lens, vd12 is the abbe number of the twelfth lens, and vd13 is the abbe number of the thirteenth 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 the following conditions: vd3 is less than or equal to 25, Vd4 is more than or equal to 55, and | Vd3-Vd4| is >30, wherein Vd3 is the abbe number of the third lens, and Vd4 is the abbe number of the fourth 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 the following conditions: nd5>1.95, where nd5 is the refractive index of the fifth lens.

6. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein the optical imaging lens further satisfies the following conditions: nd6 is more than or equal to 1.9, nd14 is more than or equal to 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 more than 0.63.

7. The optical imaging lens with large light transmission and large image plane according to claim 1, wherein the optical imaging lens further satisfies the following conditions: 0.75< | R111/R122| <0.85, where R111 is a radius of curvature of an object-side surface of the eleventh lens and R122 is a radius of curvature of an image-side surface of the twelfth lens.

8. The optical imaging lens with large light transmission and large image plane according to claim 1, characterized in that: 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 space between the first to fourteenth lenses caused by high temperature or low temperature is delta BFL2, and the requirement that delta BFL 1-delta BFL2 is 0 is met.

9. The optical imaging lens with large light transmission and large image plane according to claim 8, characterized in that: the temperature coefficients of refractive indexes 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 all positive, the temperature coefficients of refractive indexes of the eighth lens, the ninth lens and the twelfth lens are all negative, and the requirement of |. Δ BFL3 |. Δ BFL 4|, is satisfied, wherein Δ BFL3 is a back focal length variation 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 Δ BFL4 is a back focal length variation 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.

10. The optical imaging lens with large light transmission and large image plane according to claim 1, characterized in that: the eleventh lens bears directly against the twelfth lens.