CN216748258U - Glass-plastic hybrid lens - Google Patents

Abstract

A glass-plastic hybrid lens, comprising: a first lens (L1), a second lens (L2), a stop (ST0), a third lens (L3), a fourth lens (L4), a fifth lens (L5), and a sixth lens (L6) which are arranged in order from the object side to the image side along the optical axis; the third lens (L3) and the sixth lens (L6) are negative power lenses; the fourth lens (L4) and the fifth lens (L5) are positive power lenses; the second lens (L2) is a positive power lens or a negative power lens; the first lens (L1) is a positive power lens or a negative power lens. This mixed camera lens is moulded to glass can make the cost greatly reduced of camera lens when promoting the camera lens performance, has improved product competitiveness. In addition, the device also has the advantages of small volume, low tolerance sensitivity, no virtual coke in the temperature range of-40 ℃ to 80 ℃ and the like.

Description

Glass-plastic hybrid lens

Technical Field

The utility model relates to the technical field of optical imaging, in particular to a glass-plastic hybrid lens.

Background

The security monitoring lens can monitor in multiple directions within 24 hours, and a large amount of manpower and material resources are saved. In the modern society of scientific and technological high-speed development, the requirements for the fixed-focus monitoring lens tend to ensure that the imaging is clearer and the imaging is kept clear and the cost is low under the conditions of higher imaging definition, miniaturization and low illumination. The traditional prime lens is difficult to realize large aperture, excellent high and low temperature performance and day and night confocal under the condition of low cost.

SUMMERY OF THE UTILITY MODEL

In order to make up for the defects, the utility model aims to provide the glass-plastic hybrid lens, so that the cost of the lens is greatly reduced while the performance of the lens is improved, and the product competitiveness is improved. In addition, the device also has the advantages of small volume, low tolerance sensitivity, no virtual coke in the temperature range of-40 ℃ to 80 ℃ and the like.

In order to achieve the above object of the present invention, the present invention provides a glass-plastic hybrid lens, including: the lens comprises a first lens, a second lens, a diaphragm, a third lens, a fourth lens, a fifth lens and a sixth lens which are arranged in sequence from an object side to an image side along an optical axis;

the third lens and the sixth lens are negative focal power lenses; the fourth lens and the fifth lens are positive focal power lenses; the second lens is a positive focal power lens or a negative focal power lens; the first lens is a positive focal power lens or a negative focal power lens.

According to an aspect of the present invention, the first lens and the third lens are meniscus lenses, the second lens and the sixth lens are meniscus lenses, the fourth lens is a biconvex lens, and the fifth lens is a paraxial region biconvex lens or a meniscus lens.

According to one aspect of the utility model, at most 5 plastic aspheric lenses are included in the lens barrel.

According to one aspect of the utility model, the first lens, the second lens, the third lens, the fifth lens and the sixth lens are the plastic aspheric lens, and the fourth lens is a glass spherical lens.

According to one aspect of the utility model, the FNO number of the lens satisfies: FNO is less than or equal to 1.6.

According to one aspect of the utility model, the effective focal length f and the half-image height h of the lens satisfy: f/h is more than or equal to 1.8 and less than or equal to 2.4.

According to one aspect of the utility model, the effective focal length f of the lens and the effective focal length f3 of the third lens satisfy: f3/f is not less than-5 and not more than-3.5.

According to one aspect of the utility model, the effective focal length f of the lens and the sum f5+ f6 of the effective focal lengths f of the fifth lens and the sixth lens satisfy: (f5+ f6)/f is less than or equal to-0.45 and less than or equal to-0.8.

According to one aspect of the utility model, the effective focal length f and the total length TTL of the lens meet: f/TTL is more than or equal to 0.32 and less than or equal to 0.42.

According to one aspect of the utility model, the lens includes at least one low dispersion lens.

According to an aspect of the utility model, the abbe number Vd of the low dispersion lens satisfies: vd is more than or equal to 65.

According to one aspect of the utility model, the abbe number (relative to D-light) Vd4 of the fourth lens satisfies: vd4 is more than or equal to 65 and less than or equal to 95;

the refractive index value (relative to D light) Nd4 of the fourth lens satisfies: nd4 is more than or equal to 1.43 and less than or equal to 1.60.

According to one aspect of the utility model, the image plane height phi of the lens is 7.6mm, and the principal ray inclination angle CRA meets the condition that CRA is less than or equal to 13 degrees.

According to one aspect of the utility model, the protection glass plate is arranged in front of the image side surface of the lens.

According to one aspect of the utility model, the total length of the lens with the protective flat glass is less than or equal to 22.47 mm.

According to an aspect of the utility model, the stop is located on an image-side surface of the second lens or on an object-side surface of the third lens.

The glass-plastic hybrid lens is beneficial to improving the light transmissibility and well correcting various aberrations of the system by reasonably setting the concavity and the convexity, the material and the focal power of each lens, so that the requirements of large aperture and 8MP image output can be met, the overall illumination is uniform, the brightness is high (more than 45 percent of the relative illumination), and the cost is relatively low.

According to the glass-plastic hybrid lens, the maximum number of plastic aspheric lenses in the lens can reach 5, so that the lens is arranged, the performance of the lens is further improved, the cost of the lens is further reduced, and the product competitiveness is improved.

The glass-plastic hybrid lens perfectly compensates the back focal drift of the lens at high and low temperatures by skillfully matching the glass-plastic hybrid material and the positive and negative focal powers, and ensures that the lens can be clearly imaged at the limiting temperature of-40-80 ℃.

At least one lens of the glass-plastic hybrid lens is a low dispersion lens. The imaging edge image quality can be improved by arranging the low-dispersion lens, and the purple edge phenomenon is relieved. Further, the numerical ranges of the abbe number and the refractive index of the fourth lens are determined. Further correct the colour difference of camera lens through above-mentioned setting, balanced blue light and guaranteed the high quality formation of image of near-infrared light, also can guarantee to have lower purple boundary risk under the less condition of infrared out of focus simultaneously.

According to the glass-plastic hybrid lens, the image plane height phi of the lens is 7.6mm, and the inclination angle CRA of the principal ray is less than or equal to 13 degrees. Through the arrangement, the lens can adapt to the sensors with multiple styles, the application prospect is wide, and the market competitiveness is improved.

Drawings

Fig. 1 is a schematic structural diagram of a lens according to a first embodiment;

FIG. 2 is a MTF graph of a lens according to one embodiment;

FIG. 3 is a Through-Focus-MTF plot for a lens frequency of 120lp/mm in accordance with one embodiment; FIG. 4 is a ray fan diagram of a lens according to the first embodiment;

fig. 5 is a schematic structural diagram of a lens according to a second embodiment;

FIG. 6 is a MTF graph of a lens according to a second embodiment;

FIG. 7 is a Through-Focus-MTF plot with a lens frequency of 120lp/mm according to a second embodiment of the present invention; FIG. 8 is a ray fan diagram of a lens according to the second embodiment;

fig. 9 is a schematic structural diagram of a lens according to a third embodiment;

fig. 10 is an MTF graph of a lens according to a third embodiment;

FIG. 11 is a Through-Focus-MTF plot of a lens frequency of 120lp/mm according to the third embodiment; FIG. 12 is a ray fan diagram of a lens according to the third embodiment;

fig. 13 is a schematic structural diagram of a lens according to the fourth embodiment;

fig. 14 is an MTF graph of a lens according to the fourth embodiment;

FIG. 15 is a Through-Focus-MTF plot of a lens frequency of 120lp/mm according to the fourth embodiment; fig. 16 is a ray fan diagram of the lens according to the fourth embodiment.

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 utility model, 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," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.

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

As shown in fig. 1, the glass-plastic hybrid lens of the present invention sequentially comprises, from the object side to the image side: a first lens L1, a second lens L2, an aperture stop ST0, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens L6.

In the present invention, the first lens L1, the third lens L3, and the sixth lens L6 are negative power lenses, the fourth lens L4 and the fifth lens L5 are positive power lenses, and the second lens L2 is a positive power lens or a negative power lens.

In the present invention, the first lens L1 and the third lens L3 are meniscus lenses, the second lens L2 and the sixth lens L6 are meniscus lenses, the fourth lens L4 is a biconvex lens, and the fifth lens L5 is a paraxial region biconvex lens or a meniscus lens.

In the present invention, at most 5 of the lenses are plastic aspheric lenses. According to the concept of the utility model, the concave-convex property, the material and the focal power distribution of each lens are reasonably set, so that the transmission of light rays is favorably improved, various aberrations of the system can be well corrected, the requirements of large aperture and 8MP image output can be realized, the overall illumination is uniform, the brightness is high (more than 45 percent of the relative illumination), and the cost is relatively low.

In the present invention, the maximum number of the plastic aspheric lenses in the lens can reach 5, and further, the first lens L1, the second lens L2, the third lens L3, the fifth lens L5 and the sixth lens L6 are plastic aspheric lenses, and the fourth lens L4 is a glass spherical lens. So set up the camera lens, make the cost of camera lens further reduce when further promoting the camera lens performance, improved product competitiveness.

In the utility model, the FNO number of the lens satisfies the following conditions: FNO is less than or equal to 1.6. The effective focal length f and the half-image height h of the lens meet the following conditions: f/h is more than or equal to 1.8 and less than or equal to 2.4. The effective focal length f of the lens and the effective focal length f3 of the third lens L3 satisfy: f3/f is not less than-5 and not more than-3.5. The effective focal length f of the lens and the sum f5+ f6 of the effective focal lengths of the fifth lens L5 and the sixth lens L6 satisfy: (f5+ f6)/f is less than or equal to-0.45 and less than or equal to-0.8. The effective focal length f and the total length TTL of the lens meet the following conditions: f/TTL is more than or equal to 0.32 and less than or equal to 0.42.

According to the concept of the utility model, the back focal drift of the lens at high and low temperatures is perfectly compensated by skillfully matching the glass-plastic mixed material and the positive and negative focal powers, and the clear imaging of the lens at the limiting temperature of-40-80 ℃ is ensured.

In the present invention, at least one of the lenses is a low dispersion lens. The imaging edge image quality can be improved by arranging the low-dispersion lens, and the purple edge phenomenon is relieved. According to the concept of the utility model, the Abbe number Vd of the low dispersion lens is more than or equal to 65. Further, the abbe number (relative to D light) Vd4 of the fourth lens L4 satisfies: 65 Vd4 95, and the refractive index value (relative to D light) Nd4 of the fourth lens L4 satisfies: nd4 is more than or equal to 1.43 and less than or equal to 1.60. The chromatic aberration of the lens is further corrected through the arrangement, high-quality imaging of blue light and near infrared light is balanced, and lower purple boundary risk can be guaranteed under the condition that infrared defocusing is small.

In the utility model, the image plane height phi of the lens is 7.6mm, and the inclination angle CRA of the chief ray is less than or equal to 13 degrees. Through the arrangement, the lens can adapt to the sensors with multiple styles, the application prospect is wide, and the market competitiveness is improved.

In the utility model, the front end of the image side surface of the lens is also provided with the protective plate glass, and the lens in the lens can be protected by the protective plate glass. The total length of the lens with the protective plate glass is less than or equal to 22.47 mm. The volume of the lens can be smaller through the arrangement, and the lens is more convenient to carry.

In the present invention, the stop ST0 is located on the image-side surface of the second lens L2 or on the object-side surface of the third lens L3.

By combining the arrangement, the whole optical system has low tolerance sensitivity, better single-part and assembly tolerance, higher production yield and good manufacturability.

Four sets of embodiments are given below for the above arrangement according to the present invention to specifically describe the glass-plastic hybrid lens according to the present invention. Since the hybrid glass-plastic lens according to the utility model has 6 lenses in total, each lens has two optical surfaces, plus the diaphragm S, the imaging plane IMA of the lens and the plane of the CG between the imaging plane IMA and the lens. In the present invention, there are 16 optical surfaces at the maximum. For convenience of description, the respective face numbers are designated as S1 to S16.

Specific parameters of four groups of embodiments specifically satisfying the conditional expressions are shown in table 1 below:

conditional formula (II)	Embodiment mode 1	Embodiment mode 2	Embodiment 3	Embodiment 4
					FNO≤1.6	1.6	1.5	1.4	1.6
1.8≤f/h≤2.4	2.17	2.2	1.8	2.4
					-5≤f3/f≤-3.5	-5	-3.9	-3.5	-4.3
-0.8≤(f5+f6)/f≤-0.45	-0.46	-0.75	-0.7	-0.5
					65≤Vd4≤95	90.2	95.1	81.6	68.6
1.43≤Nd4≤1.60	1.46	1.44	1.5	1.60
					0.32≤f/TTL≤0.42	0.37	0.38	0.32	0.41

TABLE 1

The aspherical surface satisfies the following formula:

wherein z is the axial distance from the curved surface to the vertex at the position of the height h perpendicular to the optical axis along the optical axis direction, c represents the curvature at the vertex of the aspheric curved surface, and k is a conic coefficient. A4, a6, A8, a10, a12, a14 and a16 respectively represent aspheric coefficients of fourth order, sixth order, eighth order, twelfth order, fourteen order and sixteenth order.

The first embodiment:

the focal power of the first lens L1 lens is negative, and the focal power of the first lens L1 lens is positive; TTL 22.41mm, FNO 1.6, and the paraxial region of the fifth lens L5 was a biconvex lens.

Table 2 lists the parameters of the lens and the lens in this embodiment, including the surface type, the radius of curvature, the thickness, the refractive index of the material, and the abbe number.

Number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	4.753	1.42	1.54	55.7
S2	Aspherical surface	3.557	2.44
						S3	Aspherical surface	-2.595	1.35	1.54	55.7
S4	Aspherical surface	-3.615	-0.5
						S5(STO)	Spherical surface	Infinity	0.91
S6	Aspherical surface	5.045	1.25	1.64	23.5
						S7	Aspherical surface	4.587	0.96
S8	Spherical surface	10.351	3.95	1.46	90.2
						S9	Spherical surface	-6.385	0.05
S10	Aspherical surface	13.257	2.83	1.53	56.3
						S11	Aspherical surface	-6.244	0.43
S12	Aspherical surface	-2.090	1.43	1.64	23.5
						S13	Aspherical surface	-4.384	5.09
S14	Spherical surface	Infinity	0.7	1.52	64.2
						S15	Spherical surface	Infinity	0.1
S16(IMA)	Spherical surface	Infinity

TABLE 2

Table 3 shows aspheric coefficients of the respective aspheric lenses in the present embodiment.

Number of noodles

K

A4

A6

A8

A10

A12

S1

-0.1883E+00

-4.086E-003

-2.946E-005

6.837E-006

2.860E-007

7.427E-008

S2

-0.3527E+00

-8.964E-003

-8.726E-005

-2.488E-005

8.860E-006

-4.901E-007

S3

-0.6047E+00

1.268E-003

-1.362E-004

1.442E-005

1.162E-007

-2.589E-008

S4

-4.2272E+00

-1.423E-003

-1.808E-005

-9.813E-006

-3.992E-008

1.461E-009

S6

-5.1341E+00

2.125E-003

-2.249E-005

-9.753E-008

3.056E-009

5.096E-010

S7

-7.7660E+00

-7.026E-004

1.511E-005

-1.263E-007

1.748E-008

2.394E-009

S10

-2.5859E+00

-1.435E-005

5.517E-005

-2.012E-007

4.023E-009

8.996E-010

S11

-4.9191E+00

-3.504E-004

7.273E-005

-1.489E-006

1.113E-008

-2.952E-009

S12

5.5184E+00

6.505E-003

3.775E-005

-1.165E-007

1.015E-008

-2.912E-010

S13

-6.7527E+00

-1.437E-004

2.690E-005

-1.993E-006

1.906E-008

4.261E-009

TABLE 3

The second embodiment:

the focal power of the first lens L1 is negative, the focal power of the first lens L1 is positive, TTL is 22.02mm, FNO is 1.5, and the paraxial region of the fifth lens L5 is a biconvex lens.

Table 4 lists the relevant parameters of the lens and lens in this embodiment, including surface type, radius of curvature, thickness, refractive index of the material, and abbe number.

Number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	4.861	2.05	1.54	55.7
S2	Aspherical surface	3.641	2.81
						S3	Aspherical surface	-3.507	1.47	1.53	56.1
S4	Aspherical surface	-4.319	0.10
						S5(STO)	Aspherical surface	5.595	1.39	1.64	23.5
S6	Aspherical surface	4.307	0.47
						S7	Spherical surface	10.181	3.45	1.44	95.1
S8	Spherical surface	-7.011	0.08
						S9	Aspherical surface	15.219	2.52	1.54	55.7
S10	Aspherical surface	-5.076	0.33
						S11	Aspherical surface	-3.148	1.45	1.64	23.5
S12	Aspherical surface	-9.492	5.1
						S13	Spherical surface	Infinity	0.7	1.52	64.2
S14	Spherical surface	Infinity	0.1
						S15(IMA)	Spherical surface

TABLE 4

Table 5 shows aspheric coefficients of the respective aspheric lenses in the present embodiment.

Number of noodles

K

A4

A6

A8

A10

A12

S1

-0.2687E+00

-1.668E-003

-1.203E-005

2.468E-007

-4.332E-008

-1.192E-009

S2

1.3057E+00

-5.916E-003

-7.250E-004

-8.322E-005

1.400E-006

-9.337E-007

S3

-0.1937E+00

1.307E-003

-1.492E-004

2.517E-005

-7.777E-007

-1.425E-009

S4

-5.1945E+00

-5.647E-003

4.279E-005

1.074E-006

-1.534E-008

7.551E-009

S5

7.0115E+00

3.153E-004

-8.043E-005

2.462E-007

-3.383E-008

2.215E-009

S6

1.6113E+00

5.022E-003

-7.494E-004

1.626E-006

-1.215E-007

-5.463E-008

S9

3.2981E+01

2.551E-003

-4.184E-005

4.523E-006

-8.128E-008

-2.954E-008

S10

3.5690E+00

4.194E-003

4.664E-004

-7.009E-006

-4.918E-007

6.576E-008

S11

0.2521E+00

-2.899E-003

3.453E-005

-1.978E-006

1.247E-008

-3.698E-009

S12

1.1765E+00

-1.923E-004

5.456E-005

-2.124E-006

-2.045E-007

2.453E-008

TABLE 5

Third embodiment:

the focal power of the first lens L1 is negative, the focal power of the second lens L2 is positive, TTL is 21.38mm, FNO is 1.4, and the paraxial region of the fifth lens L5 is a biconvex lens.

Table 6 lists relevant parameters of the lens and the lens in this embodiment, including surface type, radius of curvature, thickness, refractive index of material, and abbe number.

Number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	4.119	1.45	1.53	56.1
S2	Aspherical surface	2.301	3.03
						S3	Aspherical surface	-3.350	1.42	1.54	55.7
S4(STO)	Aspherical surface	-3.265	0.11
						S5	Aspherical surface	5.325	1.08	1.64	23.5
S6	Aspherical surface	2.543	1.15
						S7	Spherical surface	12.042	2.98	1.5	81.6
S8	Spherical surface	-8.443	0.05
						S9	Aspherical surface	26.933	2.64	1.53	56.1
S10	Aspherical surface	-4.261	0.37
						S11	Aspherical surface	-3.042	1.2	1.64	23.5
S12	Aspherical surface	-4.676	5.1
						S13	Spherical surface	Infinity	0.7	1.52	64.2
S14	Spherical surface	Infinity	0.1
						S15(IMA)	Spherical surface

TABLE 6

Table 7 shows aspheric coefficients of the respective aspheric lenses in the present embodiment.

Number of noodles

K

A4

A6

A8

A10

A12

S1

1.1823E+00

-1.198E-003

-2.089E-005

-9.476E-006

-5.346E-007

3.453E-008

S2

-4.5471E+00

1.322E-004

-1.698E-005

2.327E-006

-2.135E-007

1.004E-008

S3

-3.3570E+00

1.182E-003

-1.831E-004

5.051E-005

-8.114E-007

-3.545E-008

S4

-2.2406E+00

-4.736E-003

1.551E-005

-8.079E-006

2.043E-008

-1.511E-009

S5

7.9322E+00

8.415E-004

-4.454E-006

5.634E-007

-2.504E-008

-3.587E-009

S6

8.3169E+00

-1.146E-004

-1.198E-005

4.606E-006

-5.668E-007

2.349E-008

S9

-6.9089E+01

1.386E-004

-1.886E-005

2.083E-007

-1.878E-008

6.567E-009

S10

-3.5082E+00

-2.890E-003

1.089E-005

-1.603E-006

9.731E-007

1.043E-008

S11

-0.7456E+00

-2.665E-004

2.855E-005

-2.799E-006

1.946E-009

-5.320E-009

S12

-4.0727E+00

3.540E-003

-1.108E-005

1.569E-006

-1.055E-007

2.766E-008

TABLE 7

Fourth embodiment:

the focal power of the first lens L1 lens is positive, and the focal power of the second lens L2 lens is negative; TTL is 22.42mm, FNO is 1.6, and fifth lens L5 is a paraxial concave-convex lens.

Table 8 lists the relevant parameters of the lens and the lens in this embodiment, including surface type, radius of curvature, thickness, refractive index of the material, and abbe number.

Number of noodles	Surface type	R value	Thickness of	Refractive index	Abbe number
						S1	Aspherical surface	5.050	2.05	1.53	56.1
S2	Aspherical surface	2.657	2.69
						S3	Aspherical surface	-3.555	1.42	1.54	55.7
S4	Aspherical surface	-5.082	0.05
						S5(STO)	Spherical surface	Infinity	1.19
S6	Aspherical surface	7.716	1.75	1.64	23.5
						S7	Aspherical surface	5.751	0.44
S8	Spherical surface	8.301	3.04	1.60	68.6
						S9	Spherical surface	-5.345	0.06
S10	Aspherical surface	-104.080	2.33	1.54	55.7
						S11	Aspherical surface	-8.181	0.25
S12	Aspherical surface	-4.651	1.35	1.66	20.4
						S13	Aspherical surface	-13.287	5.0
S14	Spherical surface	Infinity	0.7	1.52	64.2
						S15	Spherical surface	Infinity	0.1
S16(IMA)	Spherical surface

TABLE 8

Table 9 shows the aspherical surface coefficients of the aspherical lenses in the present embodiment.

Number of noodles

K

A4

A6

A8

A10

A12

S1

-1.5689E+00

-4.881E-003

-7.144E-005

4.774E-006

3.305E-007

-1.008E-008

S2

0.1563E+00

-4.735E-004

2.383E-005

-8.030E-006

1.132E-007

-7.011E-009

S3

1.2659E+00

1.564E-003

-6.562E-004

1.976E-005

-5.589E-008

5.428E-009

S4

-5.0414E+00

4.321E-003

-9.776E-005

1.794E-006

-2.140E-007

1.560E-008

S6

-1.7940E+01

-1.543E-004

3.051E-006

-3.862E-007

2.990E-009

-1.016E-010

S7

0.0107E+00

-2.507E-004

-3.775E-005

1.203E-005

-1.609E-007

1.497E-009

S10

6.2627E+01

-1.138E-003

1.154E-005

-2.291E-006

2.386E-007

-9.708E-008

S11

3.6897E+00

-4.853E-004

1.505E-005

-1.177E-007

-1.174E-007

4.216E-009

S12

-1.8082E+00

7.838E-004

1.169E-005

-1.773E-006

5.512E-007

-2.011E-008

S13

-3.5939E+01

1.073E-003

-8.568E-005

6.593E-006

-3.989E-008

1.136E-009

TABLE 9

The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and it is apparent to those skilled in the art that various modifications and variations can be made in the present invention. 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 (16)

1. A glass-plastic hybrid lens, comprising: a first lens (L1), a second lens (L2), a stop (ST0), a third lens (L3), a fourth lens (L4), a fifth lens (L5), and a sixth lens (L6) which are arranged in order from the object side to the image side along the optical axis;

the third lens (L3) and the sixth lens (L6) are negative power lenses; the fourth lens (L4) and the fifth lens (L5) are positive power lenses; the second lens (L2) is a positive power lens or a negative power lens; characterized in that the first lens (L1) is a positive power lens or a negative power lens.

2. The lens barrel according to claim 1, wherein the first lens (L1) and the third lens (L3) are meniscus lenses, the second lens (L2) and the sixth lens (L6) are meniscus lenses, the fourth lens (L4) is a biconvex lens, and the fifth lens (L5) is a paraxial region biconvex lens or a meniscus lens.

3. The lens barrel according to claim 1, wherein the lens barrel includes at most 5 plastic aspheric lenses.

4. A lens barrel according to claim 3, wherein the first lens (L1), the second lens (L2), the third lens (L3), the fifth lens (L5) and the sixth lens (L6) are the plastic aspherical lenses, and the fourth lens (L4) is a glass spherical lens.

5. The lens barrel according to claim 1, wherein the FNO number of the lens barrel satisfies: FNO is less than or equal to 1.6.

6. The lens barrel according to claim 1, wherein an effective focal length f and a half-image height h of the lens satisfy: f/h is more than or equal to 1.8 and less than or equal to 2.4.

7. A lens barrel according to claim 1, wherein the effective focal length f of the lens barrel and the effective focal length f3 of the third lens (L3) satisfy: f3/f is not less than-5 and not more than-3.5.

8. A lens barrel according to claim 1, wherein the effective focal length f of the lens barrel and the sum f5+ f6 of the effective focal lengths of the fifth lens (L5) and the sixth lens (L6) satisfy: (f5+ f6)/f is less than or equal to-0.45 and less than or equal to-0.8.

9. The lens barrel according to claim 1, wherein an effective focal length f and a total length TTL of the lens barrel satisfy: f/TTL is more than or equal to 0.32 and less than or equal to 0.42.

10. The lens barrel as claimed in claim 1, wherein the lens barrel includes at least one low dispersion lens.

11. The lens barrel according to claim 10, wherein an abbe number Vd of the low-dispersion lens satisfies: vd is more than or equal to 65.

12. A lens barrel according to claim 10 or 11, wherein the fourth lens (L4) satisfies, with respect to an abbe number Vd4 of D light: vd4 is more than or equal to 65 and less than or equal to 95;

the fourth lens (L4) has a refractive index value Nd4 with respect to D light that satisfies: nd4 is more than or equal to 1.43 and less than or equal to 1.60.

13. The lens according to claim 1, wherein an image plane height Φ of the lens is 7.6mm, and a principal ray tilt angle CRA satisfies: CRA is less than or equal to 13 degrees.

14. The lens barrel according to claim 1, further comprising a protective plate glass provided at an image side front end of the lens barrel.

15. The lens barrel as claimed in claim 14, wherein the total length of the lens barrel with the protective plate glass is 22.47mm or less.

16. A lens barrel according to claim 1, characterized in that the Stop (STO) is located on an image side surface of the second lens (L2) or on an object side surface of the third lens (L3).

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