CN210199391U - Glass-plastic mixed wide-angle lens - Google Patents

Abstract

The utility model relates to a mixed wide-angle camera lens is moulded to glass, include along optical axis from the thing side to the image side arrange in proper order: a first lens (L1) having a negative power, a second lens (L2) having a positive power, a STOP (STOP), a third lens (L3) having a positive power, a fourth lens (L4) having a negative power, and a fifth lens (L5) having a positive power; in the glass-plastic hybrid wide-angle lens, an absolute value of a focal length of the second lens (L2) is largest, and an absolute value of a focal length of the fifth lens (L5) is smallest. The utility model discloses a camera lens volume small angle is big, and the biggest image plane 1/4 ", the resolution reaches two million resolutions, can confocal day night, -40 ℃ -80 ℃ temperature range not virtual burnt simultaneously.

Description

Glass-plastic mixed wide-angle lens

Technical Field

The utility model relates to an optical imaging field especially relates to a mixed wide-angle camera lens is moulded to glass.

Background

The lens is used as a main component of the security system, and the performance of the lens determines the imaging performance of the security system. With the development of the security field, the application range of the camera is more and more extensive, and higher requirements are provided for the aspects of the resolution power, the aperture, the high and low temperature performance, day and night confocal performance and the like of the lens.

In the current market, the lens with a large field angle cannot meet the requirements of size miniaturization and light weight. In addition, for high resolution and chromatic aberration correction, a plurality of glass lenses or cemented lenses are mostly adopted, and the product has the defects of high cost and large volume.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem, provide a mixed wide-angle camera lens is moulded to glass.

In order to achieve the above object, the present invention provides a glass-plastic hybrid wide-angle lens, which comprises: a first lens having a negative focal power, a second lens having a positive focal power, a diaphragm, a third lens having a positive focal power, a fourth lens having a negative focal power, and a fifth lens having a positive focal power;

in the glass-plastic mixed wide-angle lens, the absolute value of the focal length of the second lens is the largest, and the absolute value of the focal length of the fifth lens is the smallest.

According to an aspect of the present invention, the first lens, the second lens, the fourth lens and the fifth lens are plastic aspheric lenses;

the third lens is a glass lens.

According to an aspect of the present invention, the first lens is a plano-concave lens, the second lens is a concave-convex lens, the third lens is a convex-convex lens, the fourth lens is a concave-concave lens, and the fifth lens is a convex-convex lens.

According to the utility model discloses an aspect, the relative aperture FNO of camera lens satisfies the condition: FNO is less than or equal to 2.5.

According to an aspect of the present invention, the focal length Fa of the first lens group composed of the first lens and the second lens and the effective focal length F of the lens satisfy the following relation: Fa/F is more than or equal to-5 and less than or equal to-3.

According to an aspect of the present invention, the focal length Fb of the second lens group and the focal length Fa of the first lens group, which are composed of the third lens, the fourth lens, and the fifth lens, satisfy the following relational expression: Fa/Fb is more than or equal to-3 and less than or equal to-1.

According to the utility model discloses an aspect, the optics total length TTL of camera lens with the effective focal length F of camera lens satisfies the relational expression: TTL/F is more than or equal to 6 and less than or equal to 8.

According to the utility model discloses an aspect, the image space half image height H of camera lens with the effective focal length F of camera lens satisfies the relational expression: H/F is more than or equal to 0.8 and less than or equal to 1.1.

According to an aspect of the present invention, the refractive index Nd and the abbe number Vd of the third lens satisfy: nd >1.45, Vd > 65.

According to an aspect of the utility model, the angle of view of camera lens is greater than 100, and optics total length TTL is less than or equal to 16 mm.

According to the utility model discloses a scheme, the camera lens adopts the aspherical lens of four pieces of plastics materials, and wherein first lens, second lens, fourth lens and fifth lens all are the plastics material, have reduced the cost of camera lens production.

According to the utility model discloses a scheme, the camera lens can realize that the angle of vision is greater than 100, and when guaranteeing that the camera lens overall length is less, the resolution reaches more than two million. The application range of the lens is expanded, and the market competitiveness of the lens is improved.

According to the utility model discloses a scheme, the camera lens has corrected optical system's aberration through reasonable positive negative lens focal power distribution to through the cooperation with glass lens and lens cone, improved the defect of focus drift under the high low temperature environment, make the camera lens can not virtual burnt under-40 ℃ -80 ℃ environment. Meanwhile, the confocal lens can be realized day and night, so that the lens has excellent imaging quality under the condition of no focusing in day and night.

Drawings

Fig. 1 is a structural view schematically showing a glass-plastic hybrid wide-angle lens according to the present invention;

fig. 2 is a diagram schematically illustrating a Modulation Transfer Function (MTF) analysis of a glass-plastic hybrid wide-angle lens according to a first embodiment of the present invention;

fig. 3 is a defocus graph schematically showing a glass-plastic hybrid wide-angle lens according to a first embodiment of the present invention;

fig. 4 is a view schematically showing field curvature distortion of a glass-plastic hybrid wide-angle lens according to a first embodiment of the present invention;

fig. 5 is a diagram schematically showing a Modulation Transfer Function (MTF) analysis of a glass-plastic hybrid wide-angle lens according to a second embodiment of the present invention;

fig. 6 is a defocus graph schematically showing a glass-plastic hybrid wide-angle lens according to a second embodiment of the present invention;

fig. 7 is a view schematically showing distortion of field of a glass-plastic hybrid wide-angle lens according to a second embodiment of the present invention;

fig. 8 is an analytical view schematically showing a Modulation Transfer Function (MTF) of a glass-plastic hybrid wide-angle lens according to a third embodiment of the present invention;

fig. 9 is a defocus graph schematically showing a glass-plastic hybrid wide-angle lens according to a third embodiment of the present invention;

fig. 10 is a view schematically showing distortion of field of a glass-plastic hybrid wide-angle lens according to a third embodiment of the present invention;

fig. 11 is a diagram schematically showing a Modulation Transfer Function (MTF) analysis of a glass-plastic hybrid wide-angle lens according to a fourth embodiment of the present invention;

fig. 12 is a defocus graph schematically showing a glass-plastic hybrid wide-angle lens according to a fourth embodiment of the present invention;

fig. 13 is a view schematically showing distortion of field of a glass-plastic hybrid wide-angle lens according to a fourth embodiment of the present invention;

fig. 14 is an analytical view schematically showing a Modulation Transfer Function (MTF) of a glass-plastic hybrid wide-angle lens according to a fifth embodiment of the present invention;

fig. 15 is a defocus graph schematically showing a glass-plastic hybrid wide-angle lens according to a fifth embodiment of the present invention;

fig. 16 is a view schematically showing distortion of field of a glass-plastic hybrid wide-angle lens according to a fifth embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

In describing embodiments of the present invention, the terms "longitudinal," "lateral," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and other terms are used in an orientation or positional relationship shown in the associated drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are not repeated herein, but the present invention is not limited to the following embodiments.

Fig. 1 is a structural view schematically showing a glass-plastic hybrid wide-angle lens according to an embodiment of the present invention. As shown in fig. 1, the glass-plastic hybrid wide-angle lens of the present invention includes, arranged in sequence from the object side to the image side along the optical axis: a first lens L1 having a negative power, a second lens L2 having a positive power, a STOP, a third lens L3 having a positive power, a fourth lens L4 having a negative power, and a fifth lens L5 having a positive power. The absolute value of the focal length of the second lens L2 is the largest, and the absolute value of the focal length of the fifth lens L5 is the smallest.

The utility model discloses in, first lens L1, second lens L2, fourth lens L4 and fifth lens L5 are plastic aspheric lens, and third lens L3 is glass lens. The cost of lens production is reduced.

The utility model discloses in, first lens L1 is the flat-concave lens of crescent, and second lens L2 is concave-convex lens, and third lens L3 is convex-convex lens, and fourth lens L4 is concave-concave lens, and fifth lens L5 is convex-convex lens.

The utility model discloses in, the relative aperture FNO of camera lens satisfies the condition: FNO is less than or equal to 2.5.

Further, the focal length Fa of the first lens group composed of the first lens L1 and the second lens L2 and the effective focal length F of the lens satisfy the following relationship: Fa/F is more than or equal to-5 and less than or equal to-3. The focal length Fb of the second lens group and the focal length Fa of the first lens group, which are composed of the third lens L3, the fourth lens L4, and the fifth lens L5, satisfy the following relationship: Fa/Fb is more than or equal to-3 and less than or equal to-1. The total optical length TTL of the lens and the effective focal length F of the lens satisfy the relation: TTL/F is more than or equal to 6 and less than or equal to 8. The image space half-image height H of the lens and the effective focal length F of the lens satisfy the relation: H/F is more than or equal to 0.8 and less than or equal to 1.1. The refractive index Nd and the abbe number Vd of the third lens L3 satisfy: nd >1.45, Vd > 65.

The utility model discloses a camera lens can realize that the angle of vision is greater than 100, and TTL is less than or equal to 16 mm. Therefore, the total length of the lens is small, and the resolution reaches more than two million. The application range of the lens is expanded, and the market competitiveness of the lens is improved.

The utility model discloses the aberration of optical system has been corrected through reasonable positive and negative lens focal power distribution to the camera lens to through the cooperation with glass lens and lens cone, improved the defect of focus drift under the high low temperature environment, make the camera lens can not virtual burnt under-40 ℃ -80 ℃ environment. Meanwhile, the confocal lens can be realized day and night, so that the lens has excellent imaging quality under the condition of no focusing in day and night.

Following according to the utility model discloses an above-mentioned setting gives five groups of specific embodiments and specifically explains according to the utility model discloses a mixed wide-angle lens is moulded to glass. Because according to the utility model discloses a total five lenses of mixed wide-angle lens are moulded to glass, in addition diaphragm STOP, parallel flat board (constitute by sensor protection glass and IR switch plate) and image plane 14 faces altogether. The 14 faces are arranged in sequence according to the structural sequence of the present invention, and for convenience of description, the 14 faces are numbered as S1 to S14, where the face of the STOP is S5, S12 and S13 are two faces of a parallel flat plate, and S14 is an image face. Further, in the following embodiments, the aspherical lens surface type satisfies the following formula:

wherein z is the axial distance from the curved surface to the top point at the position which is along the direction of the optical axis and is vertical to the optical axis by the height h; c represents the curvature at the apex of the aspherical surface; k is a conic coefficient; a4, a6, A8, a10 and a12 respectively represent aspheric coefficients of fourth, sixth, eighth and twelfth orders.

Five sets of embodiment data are as in table 1 below:

TABLE 1

Fig. 1 is a structural view schematically showing a glass-plastic hybrid wide-angle lens according to the present invention. The following five embodiments are all explained based on the lens structure shown in fig. 1.

The first implementation mode comprises the following steps:

TTL＝14.63mm；

F＝2.13mm；

F#＝2.2；

table 2 shows the focal lengths of the lenses of the lens according to the first embodiment:

f1	f2	f3	f4	f5
					-3.271	12.70	5.157	-3.357	3.056

TABLE 2

Table 3 shows the parameters of a lens according to an embodiment, including surface type, radius of curvature, thickness, refractive index of material, abbe number:

number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	22.98	0.97	1.53	56.1
S2	Aspherical surface	1.61	2.11
						S3	Aspherical surface	-6.71	2.40	1.64	23.5
S4	Aspherical surface	-4.21	0.14
						S5	Spherical surface	Infinity	0.46
S6	Spherical surface	4.77	2.04	1.50	81.6
						S7	Spherical surface	-4.77	0.30
S8	Aspherical surface	-11.89	0.51	1.64	23.5
						S9	Aspherical surface	2.69	0.06
S10	Aspherical surface	3.31	1.25	1.53	56.1
						S11	Aspherical surface	-2.82	0.49
S12	Spherical surface	Infinity	0.7	1.52	64.2
						S13	Spherical surface	Infinity	3.16
S14	Spherical surface	Infinity

TABLE 3

In the present embodiment, the aspherical surface data is as shown in table 4 below, where K is a conic constant of the surface, and A, B, C, D, E are aspherical surface coefficients of fourth order, sixth order, eighth order, tenth order, and twelfth order, respectively:

K

A

B

C

D

E

S1

-10.64

-1.003E-03

-1.323E-07

1.7947E-08

4.2521E-09

4.4723E-10

S2

-0.67

0.115

3.3394E-03

-8.084E-04

5.7923E-04

-6.008E-05

S3

-23.28

-0.0149

2.8322E-03

1.4311E-04

-2.592E-04

1.1878E-04

S4

2.32

2.8154E-03

2.054E-05

5.705E-04

-3.919E-04

9.7178E-05

S8

0.0000

-0.035133

6.4849E-03

-1.242E-03

-8.04E-05

1.1856E-05

S9

-7.75

-1.398E-03

-6.559E-03

6.279E-03

-2.31E-03

3.141E-04

S10

-10.33

9.3724E-03

-9.283E-03

5.601E-03

-1.413E-03

1.75E-04

S11

-0.388

5.979E-04

-2.71E-03

2.635E-03

-1.178E-03

2.469E-04

TABLE 4

Fig. 2 to 4 are respectively a schematic analytical diagram illustrating a Modulation Transfer Function (MTF) of a glass-plastic hybrid wide-angle lens according to a first embodiment of the present invention; according to the utility model discloses a out-of-focus curve graph of glass-plastic mixed wide-angle lens of embodiment one; according to the utility model discloses a field curvature distortion diagram of mixed wide-angle camera lens is moulded to glass of embodiment one.

By optimizing the above parameter values, in conjunction with fig. 2 to 4, the aberration of the optical system is corrected, and excellent resolution and day and night confocal are realized.

The second embodiment:

TTL＝14.83mm；

F＝2.04mm；

F#＝2.5；

table 5 shows the focal lengths of the lenses of the lens of this embodiment:

f1	f2	f3	f4	f5
					-3.29	12.58	5.14	-3.25	3.02

TABLE 5

Table 6 is a table of parameters of the second embodiment, including surface type, radius of curvature, thickness, refractive index of material, abbe number:

TABLE 6

In the present embodiment, the aspherical surface data is as shown in table 7 below, where K is a conic constant of the surface, and A, B, C, D, E are aspherical surface coefficients of fourth order, sixth order, eighth order, tenth order, and twelfth order, respectively:

K

A

B

C

D

E

S1

-7.25

-9.785E-04

6.799E-07

0

0

0

S2

-0.684

0.011

3.2433E-03

-8.118E-04

5.8641E-04

-6.209E-5

S3

-26.6340

-0.0149

2.7907E-03

1.2772E-04

-5.559E-04

1.2757E-04

S4

2.31

3.0998E-03

5.5944E-06

6.2349E-04

-3.607E-04

1.0518E-04

S8

0.0000

-0.0352

6.5496E-03

-1.185E-03

-6.132E-05

0

S9

-7.65

-1.241E03

-6.562E-03

6.2732E-03

-2.318E-03

3.141E-04

S10

--10.63

9.323E-03

-9.272E-03

5.6146E-03

-1.411E-03

1.756E-04

S11

-0.4

6.169E-04

-2.72E-03

2.6314E-03

-1.178E-03

2.4675E-04

TABLE 7

Fig. 5 to 7 are respectively analysis graphs schematically showing Modulation Transfer Function (MTF) of a glass-plastic hybrid wide-angle lens according to a second embodiment of the present invention; according to the second embodiment of the present invention, the defocus curve of the glass-plastic hybrid wide-angle lens is shown; according to the utility model discloses a field curvature distortion map of mixed wide-angle camera lens is moulded to embodiment two's glass.

By optimizing the above parameter values, in conjunction with fig. 5 to 7, the aberration of the optical system is corrected, and excellent resolution and day and night confocal are realized.

The third embodiment is as follows:

TTL＝15.31mm；

F＝2.17mm；

F#＝2.4；

table 8 shows the focal lengths of the lenses of the lens of this embodiment:

f1	f2	f3	f4	f5
					-3.19	13.66	5.24	-3.21	3.04

TABLE 8

Table 9 is a parameter table of the third embodiment, including surface type, radius of curvature, thickness, refractive index of material, abbe number:

TABLE 9

In the present embodiment, the aspherical surface data is as shown in table 10 below, where K is a conic constant of the surface, and A, B, C, D, E are aspherical surface coefficients of fourth order, sixth order, eighth order, tenth order, and twelfth order, respectively:

K

A

B

C

D

E

S1

-10.16

-9.951E-04

-4.552E-07

-3.2E0-08

-6.948E-01

-1.148E-011

S2

-0.68

0.0111

3.3019E-03

-7.912E-04

5.8998E-04

-5.784E-05

S3

-28.56

-0.015

2.904E-03

1.5623E-04

-5.635E-04

1.223E-04

S4

2.33

2.8536E-03

-9.525E-05

5.2852E-04

-4.033E-04

1.0403E-04

S8

-0.238

-0.035

6.488E-03

-1.218E-03

-7.373E-05

4.6476E-06

S9

-7.61

-1.304E-03

-6.603E-03

6.2721E-03

-2.298E-03

3.1423E-04

S10

-10.67

9.3221E-03

-9.249E-03

5.6201E-03

-1.412E-03

1.75E-04

S11

-0.4

7.4136E-04

-2.713E-03

2.64E-03

-1.179E-03

2.4609E-04

watch 10

Fig. 8 to 10 are respectively analysis graphs schematically showing Modulation Transfer Functions (MTFs) of a glass-plastic hybrid wide-angle lens according to a third embodiment of the present invention; according to the third embodiment of the present invention, the defocus curve of the glass-plastic hybrid wide-angle lens is shown; according to the utility model discloses a field curvature distortion diagram of mixed wide-angle camera lens is moulded to embodiment three glass.

By optimizing the above parameter values, in conjunction with fig. 8 to 10, the aberration of the optical system is corrected, and excellent resolution and day and night confocal are realized.

The fourth embodiment:

TTL＝14.65mm；

F＝2.11mm；

F#＝2.1；

table 11 shows the focal lengths of the lenses of the lens of this embodiment:

f1	f2	f3	f4	f5
					-3.27	12.73	5.14	-3.29	3.01

TABLE 11

Table 12 is a parameter table of the fourth embodiment, including surface type, radius of curvature, thickness, refractive index of material, abbe number:

number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	19.84	0.9	1.53	56.1
S2	Aspherical surface	1.56	2.4
						S3	Aspherical surface	-6.71	2.40	1.64	23.4
S4	Aspherical surface	-4.21	0.2
						S5	Spherical surface	Infinity	0.52
S6	Spherical surface	4.77	1.98	1.50	81.6
						S7	Spherical surface	-4.77	0.30
S8	Aspherical surface	-11.85	0.49	1.64	23.7
						S9	Aspherical surface	2.63	0.07
S10	Aspherical surface	3.32	1.27	1.64	23.7
						S11	Aspherical surface	-2.82	0.49
S12	Spherical surface	Infinity	0.7	1.53	56.1
						S13	Spherical surface	Infinity	3.16
S14	Spherical surface	Infinity

TABLE 12

In the present embodiment, the aspherical surface data is as shown in table 13 below, where K is a conic constant of the surface, and A, B, C, D, E are aspherical surface coefficients of fourth order, sixth order, eighth order, tenth order, and twelfth order, respectively:

K

A

B

C

D

E

S1

-7.61

-9.711E-03

3.127E-07

-1.883E-08

-1.709E-09

-1.661E-10

S2

-0.68

0.11

3.238-E-08

-8.07E-04

5.863E-04

-5.743E-05

S3

-29.15

-0.0149

2.805E-03

1.2735E-04

-5.573E-04

1.2674E-04

S4

2.31

2.854E-03

1.7624E-05

5.5907E-04

-3.906E-04

1.043E-04

S8

-0.01

-0.035126

6.449E-03

-1.202E-03

-7.31E-05

3.267E-05

S9

-7.73

-1.361E-03

-6.2816E-03

6.2816E-03

-2.315E-03

3.1423E-04

S10

-10.41

9.3597E-03

-9.281E-03

5.625E-03

-1.410E-03

1.7646E-04

S11

-0.39

6.0825E-04

-2.707E-03

2.6412E-03

-1.177E-03

2.47E-04

watch 13

Fig. 11 to 13 are respectively analysis graphs schematically showing Modulation Transfer Functions (MTFs) of a glass-plastic hybrid wide-angle lens according to a fourth embodiment of the present invention; according to the fourth embodiment of the present invention, the defocus curve of the glass-plastic hybrid wide-angle lens is shown; according to the utility model discloses a field curvature distortion map of mixed wide-angle camera lens is moulded to embodiment four glass.

By optimizing the above parameter values, in conjunction with fig. 11 to 13, the aberration of the optical system is corrected, and excellent resolution and day and night confocal are realized.

The fifth embodiment:

TTL＝15.3mm；

F＝2.1mm；

F#＝2；

table 14 shows the focal lengths of the lenses of the lens of this embodiment:

f1	f2	f3	f4	f5
					-3.25	12.78	5.14	-3.3	3.03

TABLE 14

Table 15 is a parameter table of embodiment five, including surface type, radius of curvature, thickness, refractive index of material, abbe number:

number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	24.02	1.53	1.54	58.1
S2	Aspherical surface	1.59	2.13
						S3	Aspherical surface	-6.65	2.42	1.64	23.9
S4	Aspherical surface	-4.21	0.21
						S5	Spherical surface	Infinity	0.49
S6	Spherical surface	4.76	2.04	1.50	81.6
						S7	Spherical surface	-4.76	0.25
S8	Aspherical surface	-11.89	0.54	1.64	24
						S9	Aspherical surface	2.64	0.058
S10	Aspherical surface	3.2	1.34	1.53	56
						S11	Aspherical surface	-2.82	0.48
S12	Spherical surface	Infinity	0.7	1.52	64.2
						S13	Spherical surface	Infinity	3.16
S14	Spherical surface	Infinity

Watch 15

In the present embodiment, the aspherical surface data is as shown in table 16 below, where K is a conic constant of the surface, and A, B, C, D, E are aspherical surface coefficients of fourth order, sixth order, eighth order, tenth order, and twelfth order, respectively:

TABLE 16

Fig. 14 to 16 are respectively analysis graphs schematically showing Modulation Transfer Functions (MTFs) of a glass-plastic hybrid wide-angle lens according to a fifth embodiment of the present invention; according to the utility model, the defocus curve of the glass-plastic mixed wide-angle lens is shown in the fifth embodiment; according to the utility model discloses a field curvature distortion map of mixed wide-angle camera lens is moulded to five embodiment's glass.

By optimizing the above parameter values, in conjunction with fig. 14 to 16, the aberration of the optical system is corrected, and excellent resolution and day and night confocal are realized.

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A glass-plastic hybrid wide-angle lens includes, arranged in order from an object side to an image side along an optical axis: a first lens (L1) having a negative power, a second lens (L2) having a positive power, a STOP (STOP), a third lens (L3) having a positive power, a fourth lens (L4) having a negative power, and a fifth lens (L5) having a positive power;

the glass-plastic hybrid wide-angle lens is characterized in that the absolute value of the focal length of the second lens (L2) is the largest, and the absolute value of the focal length of the fifth lens (L5) is the smallest.

2. The glass-plastic hybrid wide-angle lens of claim 1, wherein the first lens (L1), the second lens (L2), the fourth lens (L4), and the fifth lens (L5) are plastic aspheric lenses;

the third lens (L3) is a glass lens.

3. The glass-plastic hybrid wide-angle lens of claim 2, wherein the first lens (L1) is a plano-concave lens, the second lens (L2) is a concave-convex lens, the third lens (L3) is a convex-convex lens, the fourth lens (L4) is a concave-concave lens, and the fifth lens (L5) is a convex-convex lens.

4. The glass-plastic hybrid wide-angle lens according to any one of claims 1 to 3, wherein a relative aperture FNO of the lens satisfies a condition: FNO is less than or equal to 2.5.

5. The glass-plastic hybrid wide-angle lens of any one of claims 1 to 3, wherein a focal length Fa of a first lens group consisting of the first lens (L1) and the second lens (L2) and an effective focal length F of the lens satisfy the following relation: Fa/F is more than or equal to-5 and less than or equal to-3.

6. The glass-plastic hybrid wide-angle lens of claim 5, wherein a focal length Fb of a second lens group consisting of the third lens (L3), the fourth lens (L4) and the fifth lens (L5) and a focal length Fa of the first lens group satisfy the following relation: Fa/Fb is more than or equal to-3 and less than or equal to-1.

7. The glass-plastic hybrid wide-angle lens of any one of claims 1 to 3, wherein the total optical length TTL of the lens and the effective focal length F of the lens satisfy the relation: TTL/F is more than or equal to 6 and less than or equal to 8.

8. A glass-plastic hybrid wide-angle lens according to any one of claims 1 to 3, wherein the image-side half-image height H of the lens and the effective focal length F of the lens satisfy the relation: H/F is more than or equal to 0.8 and less than or equal to 1.1.

9. The glass-plastic hybrid wide-angle lens according to any one of claims 1 to 3, wherein the refractive index Nd and the Abbe number Vd of the third lens (L3) satisfy: nd >1.45, Vd > 65.

10. The glass-plastic hybrid wide-angle lens according to any one of claims 1 to 3, wherein the field angle of the lens is greater than 100 °, and the total optical length TTL is less than or equal to 16 mm.

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