CN212321968U

CN212321968U - Large-image-plane high-resolution fisheye lens

Info

Publication number: CN212321968U
Application number: CN202021558008.7U
Authority: CN
Inventors: 曹来书; 黄波
Original assignee: Xiamen Leading Optics Co Ltd
Current assignee: Xiamen Leading Optics Co Ltd
Priority date: 2020-07-31
Filing date: 2020-07-31
Publication date: 2021-01-08
Anticipated expiration: 2030-07-31

Abstract

The utility model relates to a camera lens technical field. The utility model discloses a large image plane high resolution fisheye lens, which comprises eleven lenses; the first lens, the second lens and the seventh lens are convex-concave lenses with negative refractive index; the third lens is a concave-flat lens with negative refractive index; the fourth lens element is a meniscus lens element with positive refractive index, the fifth and eighth lens elements have positive refractive index, and the object side surface is convex; the sixth lens element and the eleventh lens element are convex lenses with positive refractive index; the ninth lens element has positive refractive index and has a convex image-side surface; the tenth lens element with negative refractive index has a concave object-side surface; the object side surface and the image side surface of the fifth lens and the sixth lens are both aspheric surfaces; the seventh lens and the eighth lens are mutually glued; the ninth lens and the tenth lens are cemented to each other. The utility model has high resolution and good imaging quality; the image surface is large; the light transmission is large; small distortion, and the pixels with the same unit angle have the advantages that the edge is close to the center.

Description

Large-image-plane high-resolution fisheye lens

Technical Field

The utility model belongs to the technical field of the camera lens, specifically relate to a fisheye camera lens of big image plane high resolution.

Background

The fisheye lens is an ultra-wide angle lens having a focal length of 16mm or less. The front lens of the lens is large in diameter and is in a parabolic shape, protrudes towards the front of the lens, is quite similar to the fish eye, and is commonly called as a fish eye lens. At present, the fisheye lens is widely applied to the fields of security monitoring, vehicle-mounted monitoring and the like, so that the requirement on the fisheye lens is higher and higher.

However, the existing common fisheye lens has many defects, such as the target surface size is about 1/2.8 inch, and the imaging frame is small; the light passing is generally not high, and the low-light effect is not good; in general, f-theta distortion is large, pixels with the same unit angle occupy fewer edges than the center, and the like, which cannot meet the increasing requirements, and needs to be improved.

Disclosure of Invention

An object of the utility model is to provide a fisheye lens of big image plane high resolution is used for solving the technical problem that above-mentioned exists.

In order to achieve the above object, the utility model adopts the following technical scheme: a fisheye lens with large image plane and high resolution comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side in sequence along an optical axis; the first lens element to the eleventh 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 negative refractive index has a convex object-side surface and a concave 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 flat image-side surface;

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

the fifth lens element has positive refractive index, and the object-side surface of the fifth lens element is convex;

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 convex object-side surface and a concave image-side surface;

the eighth lens element with positive refractive index has a convex object-side surface;

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

the tenth lens element with negative refractive index has a concave object-side surface;

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

the object side surface and the image side surface of the fifth lens and the sixth lens are both aspheric surfaces; the seventh lens and the eighth lens are mutually glued; the ninth lens and the tenth lens are mutually glued;

the lens with the refractive index of the fisheye lens only comprises the first lens to the eleventh lens.

Further, the lens further comprises a diaphragm, and the diaphragm is arranged between the fifth lens and the sixth lens.

Further, the fisheye lens further satisfies the following conditions: vd8-vd7>40, where vd7 is the Abbe number of the seventh lens and vd8 is the Abbe number of the eighth lens.

Furthermore, the fisheye lens further satisfies the following conditions: vd9-vd10>40, where vd9 is the Abbe number of the ninth lens and vd10 is the Abbe number of the tenth lens.

Further, the fisheye lens further satisfies the following conditions: the temperature coefficients of refractive index of the sixth lens, the eighth lens and the ninth lens are negative.

Further, the fisheye lens further satisfies the following conditions: -7< (f1/f) < -5, -4< (f2/f) < -2, -4< (f3/f) < -2, 4< (f4/f) <7, -4< (f7/f) < -1, 1< (f8/f) <8, 2< (f9/f) <4, -3< (f10/f) < -1, 2< (f11/f) <6, wherein f is the focal length of the fisheye lens, and f1, f2, f3, f4, f7, f8, f9, f10, and f11 are the focal length values of the first lens, the second lens, the third lens, the fourth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens, respectively.

Further, the object-side surface and the image-side surface of the fifth lens and the sixth lens are both even-order aspheric surfaces.

Further, the first lens to the eleventh lens are made of glass materials.

The utility model has the advantages of:

the utility model adopts eleven lenses, and has high resolution, high pixel and high integral imaging quality through the arrangement design of the refractive index and the surface shape of each lens; the image surface is large; the light transmission is large, and the light input quantity is large in a low-light environment; the f-theta distortion is controlled to be smaller, and the edge is close to the center of the pixel occupied by the same unit angle.

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 in visible light according to the first embodiment of the present invention;

FIG. 3 is a defocus plot of 0.435-0.656 μm visible light according to the first embodiment of the present invention;

fig. 4 is a graph of lateral chromatic aberration of visible light of 0.530 μm according to the first embodiment of the present invention;

fig. 5 is a schematic view of field curvature and distortion curve according to the first embodiment of the present invention;

fig. 6 is a contrast curve of 0.530 μm visible light according to the first embodiment of the present invention;

fig. 7 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 8 is a graph of MTF of 0.435-0.656 μm in visible light according to embodiment II of the present invention;

fig. 9 is a defocus graph of 0.435-0.656 μm visible light according to the second embodiment of the present invention;

fig. 10 is a lateral chromatic aberration graph of visible light of 0.530 μm according to the second embodiment of the present invention;

fig. 11 is a schematic view of field curvature and distortion curve of the second embodiment of the present invention;

fig. 12 is a contrast graph of visible light of 0.530 μm according to the second embodiment of the present invention;

fig. 13 is a schematic structural view of a third embodiment of the present invention;

FIG. 14 is a graph of MTF of 0.435-0.656 μm in visible light according to the third embodiment of the present invention;

fig. 15 is a defocus graph of 0.435-0.656 μm visible light according to the third embodiment of the present invention;

fig. 16 is a lateral chromatic aberration graph of visible light of 0.530 μm according to the third embodiment of the present invention;

fig. 17 is a schematic view of field curvature and distortion curve of a third embodiment of the present invention;

fig. 18 is a contrast graph of visible light of 0.530 μm according to the third embodiment of the present invention;

fig. 19 is a schematic structural diagram of a fourth embodiment of the present invention;

fig. 20 is a graph of MTF of 0.435-0.656 μm in visible light according to the fourth embodiment of the present invention;

fig. 21 is a defocus graph of 0.435-0.656 μm visible light according to the fourth embodiment of the present invention;

fig. 22 is a graph of lateral chromatic aberration of visible light of 0.530 μm according to a fourth embodiment of the present invention;

fig. 23 is a schematic view of field curvature and distortion curve of the fourth embodiment of the present invention;

fig. 24 is a contrast graph of visible light of 0.530 μm according to the 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 a fisheye lens with large image surface and high resolution, which comprises a first lens to an eleventh lens from an object side to an image side along an optical axis in sequence; the first lens element to the eleventh lens element each include an object-side surface facing the object side and passing the image light, and an image-side surface facing the image side and passing the image light.

The first lens element with negative refractive index has a convex object-side surface and a concave 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 has a negative refractive index, the object side surface of the third lens element is a concave surface, and the image side surface of the third lens element is a flat surface, so that the spacing tolerance between the third lens element and the fourth lens element can be controlled within + -10 μm, and the product yield can be improved.

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

The fifth lens element has positive refractive index, and the object-side surface of the fifth lens element is convex.

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 convex object-side surface and a concave image-side surface.

The eighth lens element has a positive refractive index, and the object-side surface of the eighth lens element is convex.

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

The tenth lens element has a negative refractive index, and an object-side surface of the tenth lens element is concave.

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

The object side surface and the image side surface of the fifth lens and the sixth lens are both aspheric surfaces, so that aberration is optimized, and image quality is improved; the seventh lens and the eighth lens are mutually glued; the ninth lens and the tenth lens are mutually glued;

the lens with the refractive index of the fisheye lens only comprises the first lens to the eleventh lens. The utility model adopts eleven lenses, and has high resolution, high pixel and high integral imaging quality through the arrangement design of the refractive index and the surface shape of each lens; the image surface is large; the light transmission is large, and the light input quantity is large in a low-light environment; the f-theta distortion is controlled to be smaller, and the edge is close to the center of the pixel occupied by the same unit angle.

Preferably, the optical module further comprises a diaphragm, the diaphragm is arranged between the fifth lens and the sixth lens, and aspheric lenses are adopted before and after the diaphragm, so that aberrations such as spherical aberration and coma aberration are further corrected, and the MTF is greatly improved.

Preferably, the fisheye lens further satisfies: vd8-vd7>40, where vd7 is the abbe number of the seventh lens and vd8 is the abbe number of the eighth lens, facilitates correction of on-axis and off-axis chromatic aberrations.

More preferably, the fisheye lens further satisfies: vd9-vd10>40, where vd9 is the abbe number of the ninth lens and vd10 is the abbe number of the tenth lens, facilitates correction of on-axis and off-axis chromatic aberrations.

Preferably, the fisheye lens further satisfies: the temperature coefficients of the refractive indexes of the sixth lens, the eighth lens and the ninth lens are negative, and the temperature drift is optimized, so that when the fisheye lens is used in a temperature range of-40-85 ℃, the fisheye lens can ensure that a picture is clear and cannot be out of focus.

Preferably, the fisheye lens further satisfies: -7< (f1/f) < -5, -4< (f2/f) < -2, -4< (f3/f) < -2, 4< (f4/f) <7, -4< (f7/f) < -1, 1< (f8/f) <8, 2< (f9/f) <4, -3< (f10/f) < -1, 2< (f11/f) <6, wherein f is the focal length of the fisheye lens, and f1, f2, f3, f4, f7, f8, f9, f10, and f11 are the focal length values of the first lens, the second lens, the third lens, the fourth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens, respectively, thereby reducing the process sensitivity and improving the yield.

Preferably, the object side surface and the image side surface of the fifth lens and the sixth lens are both even aspheric surfaces, so that the processing is easy, and the cost is reduced.

Preferably, the first lens to the eleventh lens are made of glass materials, and overall performance is further improved.

The following describes the fisheye lens with large image plane and high resolution in detail with specific embodiments.

Example one

As shown in fig. 1, a large-image-surface high-resolution fisheye 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 120, 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 protective glass 130, and an image plane 140; the first lens element 1 to the eleventh lens element 110 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 negative refractive index, and 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 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, the object-side surface 31 of the third lens element 3 is concave, and the image-side surface 32 of the third lens element 3 is planar.

The fourth lens element 4 has a positive refractive index, and an object-side surface 41 of the fourth lens element 4 is concave and an image-side surface 42 of the fourth lens element 4 is convex.

The fifth lens element 5 has a positive refractive index, the object-side surface 51 of the fifth lens element 5 is convex, and the image-side surface 52 of the fifth lens element 5 is convex, although in some embodiments, the image-side surface 52 of the fifth lens element 5 can also be concave or planar.

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 convex and an image-side surface 72 of the seventh lens element 7 is concave.

The eighth lens element 8 has a positive refractive index, the object-side surface 81 of the eighth lens element 8 is convex, and the object-side surface 82 of the eighth lens element 8 is convex, although in some embodiments, the object-side surface 82 of the eighth lens element 8 can also be concave or planar.

The ninth lens element 9 has a positive refractive index, an object-side surface 91 of the ninth lens element 9 is a plane, and an image-side surface 92 of the ninth lens element 9 is a convex surface.

The tenth lens element 100 with negative refractive power has a concave object-side surface 101 of the tenth lens element 100 and a concave image-side surface 102 of the tenth lens element 100, although the image-side surface 102 of the tenth lens element 100 can also be convex or planar in some embodiments.

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 convex.

The object-

side surfaces

51, 61 and the image-

side surfaces

52, 62 of the fifth lens 5 and the sixth lens 6 are both even-order aspheric surfaces, but are not limited thereto.

The seventh lens 7 and the eighth lens 8 are cemented with each other; the ninth lens 9 and the tenth lens 10 are cemented to each other.

In the present embodiment, the temperature coefficients of refractive indices of the sixth lens 6, the eighth lens 8, and the ninth lens 9 are negative.

In this embodiment, the first lens element 1 to the eleventh lens element 110 are made of glass, but not limited thereto, and in some embodiments, the first lens element may also be made of plastic or the like.

In other embodiments, the stop 120 may also be disposed between other lenses.

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

Table 1-1 detailed optical data for example one

In this embodiment, the object-

side surfaces

51, 61 and the image-

side surfaces

52, 62 are defined according to the following aspheric curve formula:

wherein:

r is the distance from a point on the optical surface to the optical axis.

z is the rise of this point in the direction of the optical axis.

c is the curvature of the surface.

k is the conic constant of the surface.

A₂、A₄、A₆、A₈、A₁₀、A₁₂、A₁₄Respectively as follows: second, fourth, sixth, eighth, tenth, twelfth, and fourteenth aspheric coefficients.

For details of parameters of each aspheric surface, please refer to the following table:

surface of

K

A₄

A₆

A₈

A₁₀

A₁₂

A₁₄

51

0.50

-9.708E-05

-1.938E-06

5.893E-08

-1.621E-08

7.599E-10

-1.801E-11

52

-4.65

-4.363E-05

-6.706E-07

-4.080E-07

2.082E-08

-7.030E-10

5.173E-12

61

-2.75

-9.974E-04

-5.594E-05

8.551E-07

-2.351E-06

1.892E-07

0.000E+00

62

2.24

-7.333E-04

-1.843E-04

1.887E-05

-2.348E-06

7.612E-08

2.578E-09

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

The MTF transfer function curve chart of the specific embodiment is shown in detail in FIG. 2, the defocusing curve chart is shown in detail in FIG. 3, the resolution is high and can reach 12MP (4072 multiplied by 3064), the use requirement of high pixels in market days is met, the imaging quality is excellent, and the sensor with more than 100 ten thousand of images can be met; referring to fig. 4, it can be seen that the lateral chromatic aberration is better corrected; referring to (a) and (B) of fig. 5, it can be seen that the field curvature and distortion are better corrected, the F-Theta distortion is less than-3%, the pixels occupied by the edge and the center are close to each other at the same angle, when the picture is taken, the overall visual effect is good, the edge is not compressed too much, which is closer to the isometric projection effect; referring to fig. 6, it can be seen that the relative illuminance is higher.

In this embodiment, the focal length f of the fisheye lens is 2.5 mm; f-number FNO 1.8; the field angle FOV is 184 degrees; the diameter phi of the image plane is 11.04 mm; the distance TTL between the object side surface 11 of the first lens element 1 and the image plane 140 on the optical axis I is 37.35 mm.

Example two

As shown in fig. 7, in this embodiment, the surface convexities and concavities and refractive indexes of the lenses are substantially the same as those of the first embodiment, only the image-side surface 52 of the fifth lens element 5 is a concave surface, the image-side surface 82 of the eighth lens element 8 is a concave surface, the object-side surface of the ninth lens element 9 is a convex surface, and the image-side surface 102 of the tenth lens element 100 is a convex surface, and the optical parameters such as the curvature radius of the lens surfaces and the lens thickness are different.

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

TABLE 2-1 detailed optical data for example two

For the detailed data of the parameters of each aspheric surface of this embodiment, refer to the following table:

The MTF transfer function curve chart of the specific embodiment is shown in detail in FIG. 8, the defocusing curve chart is shown in detail in FIG. 9, the resolution is high and can reach 12MP (4072 multiplied by 3064), the use requirement of high pixels in market days is met, the imaging quality is excellent, and the sensor with more than 100 ten thousand of images can be met; referring to fig. 10, it can be seen that the lateral chromatic aberration is better corrected; referring to fig. 11 (a) and (B), it can be seen that the field curvature and distortion are better corrected, the F-Theta distortion is less than-3%, the pixels occupied by the edge and the center are close to each other at the same angle, and when a picture is taken, the overall visual effect is good, the edge is not compressed too much, which is closer to the isometric projection effect; referring to fig. 12, it can be seen that the relative illuminance is higher.

EXAMPLE III

As shown in fig. 13, in this embodiment, the surface-type convexo-concave shapes and the refractive indexes of the respective lenses are substantially the same as those of the first embodiment, only the image-side surface 82 of the eighth lens element 8 is a concave surface, the object-side surface of the ninth lens element 9 is a drawing surface, and optical parameters such as the curvature radius of the surface of each lens element and the thickness of each lens element are different.

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

TABLE 3-1 detailed optical data for EXAMPLE III

surface of

K

A₄

A₆

A₈

A₁₀

A₁₂

A₁₄

51

0.00

-8.208E-05

-3.251E-07

1.145E-07

-2.791E-08

1.551E-09

-4.675E-11

52

-1.06

1.343E-04

1.657E-06

-6.913E-07

3.816E-08

-1.730E-09

1.847E-11

61

1.62

-1.343E-04

-1.183E-04

9.721E-06

-2.328E-06

7.825E-08

-1.777E-09

62

-0.05

7.399E-05

-3.989E-04

1.393E-04

-3.817E-05

5.130E-06

-2.845E-07

The MTF transfer function curve chart of the specific embodiment is shown in detail in FIG. 14, the defocusing curve chart is shown in detail in FIG. 15, the resolution is high and can reach 12MP (4072 multiplied by 3064), the use requirement of high pixels in market days is met, the imaging quality is excellent, and the sensor with more than 100 ten thousand of images can be met; referring to fig. 16, it can be seen that the lateral chromatic aberration is better corrected; referring to (a) and (B) of fig. 17, it can be seen that the field curvature and distortion are better corrected, the F-Theta distortion is less than-3%, the pixels occupied by the edge and the center are close to each other at the same angle, when the picture is taken, the overall visual effect is good, the edge is not compressed too much, which is closer to the isometric projection effect; referring to fig. 18, it can be seen that the relative illuminance is higher.

In this embodiment, the focal length f of the fisheye lens is 2.5 mm; f-number FNO 1.8; the field angle FOV is 184 degrees; the diameter phi of the image plane is 11.04 mm; the distance TTL between the object side surface 11 of the first lens element 1 and the image plane 140 on the optical axis I is 35.02 mm.

Example four

As shown in fig. 19, the surface convexoconcave and the refractive index of each lens element of this embodiment are substantially the same as those of the first embodiment, only the object-side surface 91 of the ninth lens element 9 is a convex surface, and the optical parameters such as the curvature radius of each lens element surface and the lens thickness are different.

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

TABLE 4-1 detailed optical data for example four

surface of

K

A₄

A₆

A₈

A₁₀

A₁₂

A₁₄

51

0.08

-1.487E-04

-7.081E-07

-2.429E-07

-1.639E-08

1.861E-09

-6.007E-11

52

-6.32

-2.723E-05

-5.777E-06

-3.568E-07

3.663E-08

-1.806E-09

1.980E-11

61

0.59

-5.116E-04

-6.763E-05

-6.995E-06

-3.619E-07

1.027E-07

-1.528E-08

62

-1.42

-2.819E-04

-3.249E-04

7.235E-05

-1.553E-05

1.642E-06

-7.512E-08

The MTF transfer function curve diagram of the specific embodiment is shown in detail in FIG. 20, the defocusing curve diagram is shown in detail in FIG. 21, the resolution is high and can reach 12MP (4072 multiplied by 3064), the use requirement of high pixels in market days is met, the imaging quality is excellent, and the sensor with more than 100 ten thousand of images can be met; referring to fig. 22, it can be seen that the lateral chromatic aberration is better corrected; referring to (a) and (B) of fig. 23, it can be seen that the field curvature and distortion are better corrected, the F-Theta distortion is less than-3%, the pixels occupied by the edge and the center are close to each other at the same angle, when the picture is taken, the overall visual effect is good, the edge is not compressed too much, which is closer to the isometric projection effect; referring to fig. 24, it can be seen that the relative illuminance is higher.

Table 5 values of relevant important parameters of four embodiments of the present invention

	First embodiment	Second embodiment	Third embodiment	Fourth embodiment
					vd8-vd7	57.82	57.82	44.84	55.88
vd9-vd10	44.84	44.56	44.84	44.74
					f1	-15.56	-13.07	-16.72	-15.22
f2	-9.05	-9.81	-9.42	-9.69
					f3	-7.74	-7.26	-8.57	-8.02
f4	13.24	11.68	16.92	13.63
					f7	-7.18	-8.28	-5.61	-6.14
f8	7.08	19.15	6.55	8.84
					f9	8.07	5.73	5.68	5.53
f10	-4.96	-6.38	-4.01	-4.16
					f11	9.28	12.40	8.03	8.58
f	2.5	2.5	2.5	2.5
					f1/f	-6.22	-5.23	-6.69	-6.09
f2/f	-3.62	-3.92	-3.77	-3.88
					f3/f	-3.10	-2.90	-3.43	-3.21
f4/f	5.30	4.67	6.77	5.45
					f7/f	-2.87	-3.31	-2.24	-2.46
f8/f	2.83	7.66	2.62	3.54
					f9/f	3.23	2.29	2.27	2.21
f10/f	-1.98	-2.55	-1.60	-1.66
					f11/f	3.71	4.96	3.21	3.43

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. A large-image-plane high-resolution fisheye lens is characterized in that: the optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side along an optical axis; the first lens element to the eleventh 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;

2. The large image plane high resolution fisheye lens of claim 1, characterized in that: the diaphragm is arranged between the fifth lens and the sixth lens.

3. The large image plane high resolution fisheye lens of claim 1 further satisfying: vd8-vd7>40, where vd7 is the Abbe number of the seventh lens and vd8 is the Abbe number of the eighth lens.

4. The large-image-plane high-resolution fisheye lens of claim 3 further satisfies: vd9-vd10>40, where vd9 is the Abbe number of the ninth lens and vd10 is the Abbe number of the tenth lens.

5. The large image plane high resolution fisheye lens of claim 1 further satisfying: the temperature coefficients of refractive index of the sixth lens, the eighth lens and the ninth lens are negative.

6. The large image plane high resolution fisheye lens of claim 1 further satisfying: -7< (f1/f) < -5, -4< (f2/f) < -2, -4< (f3/f) < -2, 4< (f4/f) <7, -4< (f7/f) < -1, 1< (f8/f) <8, 2< (f9/f) <4, -3< (f10/f) < -1, 2< (f11/f) <6, wherein f is the focal length of the fisheye lens, and f1, f2, f3, f4, f7, f8, f9, f10, and f11 are the focal length values of the first lens, the second lens, the third lens, the fourth lens, the seventh lens, the eighth lens, the ninth lens, the tenth lens, and the eleventh lens, respectively.

7. The large image plane high resolution fisheye lens of claim 1, characterized in that: the object side surface and the image side surface of the fifth lens and the sixth lens are both even aspheric surfaces.

8. The large image plane high resolution fisheye lens of claim 1, characterized in that: the first lens to the eleventh lens are made of glass materials.