TWI805283B - Optical imaging lens, imaging device and electronic device - Google Patents

Abstract

An optical imaging lens includes, from an object side to an image side, the first lens has negative refractive power and includes an object-side surface being convex; the second lens has refractive power and includes an image-side surface being concave; the third lens has refractive power and includes an image -side surface being convex; the fourth lens has positive refractive power and includes an object-side surface being convex; the fifth lens has refractive power; the sixth lens has positive refractive power and includes an object-side surface being convex. When specific conditions are satisfied, the optical imaging lens can have high thermal endurance and good imaging qualities.

Description

Optical camera lens group, imaging device and electronic device

The present invention relates to an optical imaging device, especially an optical imaging lens group that can be used in a portable electronic device or a monitoring imaging device, and an imaging device and an electronic device with the optical imaging lens group.

With the advancement of semiconductor process technology, the size of photosensitive elements (such as CCD and CMOS Image Sensor) required for photographic devices can be reduced and meet the requirements of miniaturized photographic devices, which drives consumer electronics to be equipped with miniaturized camera devices. ) to increase the development trend of product added value. Take portable electronic devices such as smart phones as an example. Because of their lightness and portability, consumers nowadays mostly use mobile phones to take pictures instead of using traditional digital cameras. However, consumers have increasingly higher requirements for portable electronic devices. Apart from the pursuit of beautiful appearance, they also require small size and light weight. Therefore, the small camera device mounted on the portable electronic device must be further miniaturized in overall size, so as to be installed in the thin and light electronic product.

In addition, consumers have increasingly higher requirements for imaging quality of camera devices. In addition to clear image quality, they also hope to have a wider camera angle and good thermal stability to meet the needs of various photo occasions. Therefore, how to provide a small camera device with good image quality and resistance to environmental temperature changes has become a problem that people in this technical field want to solve urgently.

EFL/AT34

10.5。 Therefore, in order to solve the above problems, the present invention provides an optical imaging lens group, which includes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens in sequence from the object side to the image side. lens. Among them, the first lens has negative refractive power, its object side is convex, and its image side is concave; the second lens has negative refractive power, its image side is concave; the third lens has positive refractive power, its object side is convex, and its image side is concave. The side is convex; the fourth lens has positive refractive power, its object side is convex, and the image side is convex; the fifth lens has negative refractive power; the sixth lens has positive refractive power, and its object side is convex. The total number of lenses of the optical imaging lens group is six; the distance from the image side of the third lens to the object side of the fourth lens is AT34, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 1.0

EFL/AT34

10.5.

f1/f2

2.5。 According to an embodiment of the present invention, the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship: 0.9

f1/f2

2.5.

(AT34+AT45)/AT12

0.58。 According to an embodiment of the present invention, the distance from the image side of the fourth lens to the object side of the fifth lens is AT45, and the distance from the image side of the first lens to the object side of the second lens is AT12, which satisfies the following Relational formula: 0.08

(AT34+AT45)/AT12

0.58.

｜R5/R6｜

4.2。 According to an embodiment of the present invention, the radius of curvature of the object side of the third lens is R5, and the radius of curvature of the image side of the third lens is R6, which satisfy the following relationship: 0.7

｜R5/R6｜

4.2.

R4*R8/R2

4.5。 According to an embodiment of the present invention, the radius of curvature of the image side of the second lens is R4, the radius of curvature of the image side of the fourth lens is R8, and the radius of curvature of the image side of the first lens is R2, which satisfy the following relationship Formula: 0.6

R4*R8/R2

4.5.

f1/f2

2.5 The present invention further provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. Among them, the first lens has negative refractive power, its object side is convex, and its image side is concave; the second lens has negative refractive power, its image side is concave; the third lens has positive refractive power, its object side is convex, and its image side is concave. The side is convex; the fourth lens has positive refractive power, its object side is convex, and the image side is convex; the fifth lens has negative refractive power; the sixth lens has positive refractive power, and its object side is convex. The total number of lenses in the optical imaging lens group is six pieces; the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship: 0.9

f1/f2

2.5

f456/EFL

3.5。 According to an embodiment of the present invention, the combined focal length of the fourth lens to the sixth lens is f456, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 2.0

f456/EFL

3.5.

f12/EFL

1.5。 According to an embodiment of the present invention, the combined focal length of the first lens to the second lens is f12, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.7

f12/EFL

1.5.

EFL/(AT34+AT45)

5.5。 According to an embodiment of the present invention, the distance from the image side of the third lens to the object side of the fourth lens is AT34, and the distance from the image side of the fourth lens to the object side of the fifth lens is AT45. The effective focal length of the lens group is EFL, which satisfies the following relationship: 1.2

EFL/(AT34+AT45)

5.5.

(T12+T34+T45)/TTL

0.3。 According to an embodiment of the present invention, the distance from the image side of the first lens to the object side of the second lens is AT12, the distance from the image side of the third lens to the object side of the fourth lens is AT34, and the fourth lens The distance from the image side of the lens to the object side of the fifth lens is AT45, and the total length of the optical camera lens group is TTL, which satisfies the following relationship: -0.1

(T12+T34+T45)/TTL

0.3.

R2/ImgH

1.5及0.8

(R1+R2)/TTL

1.7。 According to an embodiment of the present invention, the radius of curvature of the image side of the first lens is R2, the radius of curvature of the object side of the first lens is R1, the imaging height of the optical imaging lens group is ImgH, and the total length of the optical imaging lens group is TTL, which satisfies at least one of the following relations: 0.9

R2/ImgH

1.5 and 0.8

(R1+R2)/TTL

1.7.

t1/TTL

0.2、1.5

T1/T2

2.1、1.0

T2/T3

1.5及0.4

t2/AT12

1.1。 According to an embodiment of the present invention, the radius of the object side of the first lens perpendicular to the optical axis is t1, the radius of the image side of the first lens perpendicular to the optical axis is t2, the total length of the optical imaging lens group is TTL, the first lens The diameter of the lens object side perpendicular to the optical axis is T1, the diameter of the first lens image side perpendicular to the optical axis is T2, the diameter of the second lens object side perpendicular to the optical axis is T3, and the image side of the first lens is to the The distance on the optical axis from the object side of the second lens is AT12, which satisfies at least one of the following relations: 0.1

t1/TTL

0.2, 1.5

T1/T2

2.1, 1.0

T2/T3

1.5 and 0.4

t2/AT12

1.1.

EFL/ImgH

1.0及5.0

TTL/ImgH

7.5。 According to an embodiment of the present invention, the effective focal length of the optical imaging lens group is EFL, the imaging height of the optical imaging lens group is 1 mgH, and the total length of the optical imaging lens group is TTL, satisfying at least one of the following relational expressions: 0.5

EFL/ImgH

1.0 and 5.0

TTL/ImgH

7.5.

According to an embodiment of the present invention, the optical imaging lens assembly satisfies at least one of the following conditions: the object side of the second lens is convex, the object side of the fifth lens is convex, and the image side of the fifth lens is The convex surface and the image side of the sixth lens are convex surfaces.

According to an embodiment of the present invention, the optical imaging lens assembly satisfies at least one of the following conditions: the object side of the second lens is concave, the object side of the fifth lens is concave, and the image side of the fifth lens is The concave surface and the image side of the sixth lens are concave surfaces.

The present invention further provides an imaging device, which includes the aforementioned optical imaging lens group, and an image sensing element, wherein the image sensing element is arranged on the imaging surface of the optical imaging lens group.

The present invention further provides an electronic device, which includes the aforementioned imaging device.

10, 20, 30, 40, 50, 60: optical camera lens group

11, 21, 31, 41, 51, 61: the first lens

12, 22, 32, 42, 52, 62: second lens

13, 23, 33, 43, 53, 63: third lens

14, 24, 34, 44, 54, 64: fourth lens

15, 25, 35, 45, 55, 65: fifth lens

16, 26, 36, 46, 56, 66: sixth lens

17, 27, 37, 47, 57, 67: filter elements

18, 28, 38, 48, 58, 68: imaging surface

11a, 21a, 31a, 41a, 51a, 61a: the object side of the first lens

11b, 21b, 31b, 41b, 51b, 61b: image side of the first lens

12a, 22a, 32a, 42a, 52a, 62a: the object side of the second lens

12b, 22b, 32b, 42b, 52b, 62b: the image side of the second lens

13a, 23a, 33a, 43a, 53a, 63a: the object side of the third lens

13b, 23b, 33b, 43b, 53b, 63b: the image side of the third lens

14a, 24a, 34a, 44a, 54a, 64a: the object side of the fourth lens

14b, 24b, 34b, 44b, 54b, 64b: the image side of the fourth lens

15a, 25a, 35a, 45a, 55a, 65a: the object side of the fifth lens

15b, 25b, 35b, 45b, 55b, 65b: image side of the fifth lens

16a, 26a, 36a, 46a, 56a, 66a: the object side of the sixth lens

16b, 26b, 36b, 46b, 56b, 66b: image side of the sixth lens

17a, 17b, 27a, 27b, 37a, 37b, 47a, 47b, 57a, 57b, 67a, 67b: two surfaces of the filter element

100, 200, 300, 400, 500, 600: Image sensor

1000: electronic device

1010: imaging device

I: optical axis

ST: Aperture

[Fig. 1A] is a schematic diagram of the optical imaging lens group of the first embodiment of the present invention; [Fig. 1B] from left to right is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the first embodiment of the present invention; [Fig. 2A] is a schematic diagram of the optical imaging lens group of the second embodiment of the present invention; [ Fig. 2B] from left to right is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the second embodiment of the present invention; [Fig. 3A] is a schematic diagram of the optical imaging lens group of the third embodiment of the present invention; [Fig. 3B] From left to right, it is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the third embodiment of the present invention; [Fig. 4A] is a schematic diagram of the optical imaging lens group of the fourth embodiment of the present invention; [Fig. 4B ] From left to right are the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the fourth embodiment of the present invention; [Fig. 5A] is a schematic diagram of the optical imaging lens group of the fifth embodiment of the present invention; [Fig. 5B] From left to right are the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the fifth embodiment of the present invention; [Fig. 6A] is a schematic diagram of the optical imaging lens group of the sixth embodiment of the present invention; [Fig. 6B] From left to right are the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the sixth embodiment of the present invention; [Fig. 7] is a schematic diagram of the electronic device of the eighth embodiment of the present invention.

In the following embodiments, each lens of the optical imaging lens group can be made of glass or plastic, and is not limited to the materials listed in the embodiments. When the lens material is glass, the lens surface can be processed by grinding or molding; in addition, because the glass material itself is resistant to temperature changes and high hardness It can reduce the impact of environmental changes on the optical imaging lens group, thereby prolonging the service life of the optical imaging lens group. When the lens material is plastic, it is beneficial to reduce the weight of the optical camera lens group and reduce the production cost.

In an embodiment of the present invention, each lens includes an object side facing the subject and an image side facing the imaging plane. The surface shape of each lens is defined according to the shape of the surface near the optical axis area (paraxial), for example, when describing the object side of a lens as a convex surface, it means that the object side of the lens near the optical axis area is convex , that is, although the lens surface is described as convex in the embodiments, the surface may be convex or concave in a region away from the optical axis (off-axis). The shape of each lens near the axis is judged by the positive or negative value of the radius of curvature of the surface. For example, if the radius of curvature of the object side of a lens is positive, then the object side is convex; otherwise, if the other If the radius of curvature is negative, the side of the object is concave. As far as the image side of a lens is concerned, if the radius of curvature is positive, the image side is concave; on the contrary, if the radius of curvature is negative, the image side is convex.

In an embodiment of the present invention, the object side and the image side of each lens may be spherical or aspheric surfaces. Using an aspheric surface on the lens helps to correct imaging aberrations of the optical camera lens group such as spherical aberration, and reduces the number of optical lens elements used. However, the use of aspheric lenses will increase the cost of the overall optical camera lens assembly. Although in the embodiments of the present invention, some optical lenses use spherical surfaces, they can still be designed as aspheric surfaces as required; or, some optical lenses use aspheric surfaces, but they can still be designed as aspheric surfaces as required. Design it as a spherical surface.

In the embodiment of the present invention, the total track length (TTL) of the optical imaging lens group is defined as the distance on the optical axis from the object side to the imaging surface of the first lens of the optical imaging lens group. The imaging height of this optical imaging lens group is called the maximum image height ImgH (Image Height); when an image sensing element is arranged on the imaging surface, the maximum image height ImgH represents the effective sensing area of the image sensing element Half the length of the diagonal. In the following embodiments, the units of the radius of curvature, lens thickness, distance between lenses, total lens length TTL, maximum image height ImgH and focal length (Focal Length) of all lenses are expressed in millimeters (mm).

The present invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, and a sixth lens from the object side to the image side; wherein, the optical imaging lens The total number of lenses in the group is six.

The first lens has negative refractive power, and its object side surface is convex to increase the light-receiving area. Preferably, the material of the first lens is glass, which is suitable for environmental conditions with large temperature differences, and the object side or/and image side of the first lens are aspherical, which will help to improve spherical aberration. In an embodiment of the present invention, the object side or/and the image side of the first lens are spherical to reduce manufacturing cost and facilitate processing. The first lens system is made of low dispersion material, for example, the dispersion coefficient is greater than 40, preferably greater than 60, so as to reduce chromatic aberration.

The second lens has negative refraction power, and its image side is concave to adjust the light path. The object side of the second lens can be convex or concave. Preferably, the material of the second lens is plastic, so as to reduce manufacturing cost and facilitate processing.

Both the third lens and the fourth lens have positive refractive power, wherein, the object side and the image side of the third lens are both convex, and the object side and the image side of the fourth lens are both convex. Utilizing the positive refractive power of the third lens and the fourth lens helps to gather light and correct astigmatic aberration. By adjusting the ratio of the air gap between the third lens and the fourth lens to the effective focal length of the optical imaging lens group, the thermal drift of the focal plane of the optical imaging lens group can be effectively compensated, and the thermal stability is improved. In one embodiment of the present invention, the material of the third lens is plastic to reduce manufacturing cost and facilitate processing; in another embodiment of the present invention, the material of the third lens is glass, which is suitable for environmental conditions with large temperature differences , and the object side or/and image side of the third lens is aspherical, which will help to improve spherical aberration. In an embodiment of the present invention, the object side or/and the image side of the third lens are spherical to reduce manufacturing cost and facilitate processing. In one embodiment of the present invention, The material of the fourth lens is plastic to reduce manufacturing cost and facilitate processing; in another embodiment of the present invention, the material of the fourth lens is glass, which is suitable for environmental conditions with large temperature differences.

The fifth lens has negative refractive power; the object side of the fifth lens can be convex or concave, and the image side of the fifth lens can be convex or concave. The sixth lens has positive refractive power; the object side of the sixth lens is convex, and the image side of the sixth lens can be convex or concave. In a preferred embodiment, the ratio of the combined focal length of the fourth lens to the sixth lens to the effective focal length of the optical imaging lens group helps to adjust the optical imaging lens group to provide better imaging quality.

EFL/AT34

10.5 (1)。 The distance from the image side of the third lens to the object side of the fourth lens is AT34, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 1.0

EFL/AT34

10.5 (1).

When the relational expression (1) is satisfied, the thermal drift of the focal plane of the optical imaging lens group can be effectively improved, and the thermal stability can be improved.

f1/f2

2.5 (2)。 The focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship: 0.9

f1/f2

2.5 (2).

When the relationship (2) is satisfied, the thermal stability can be improved, and the thermal drift phenomenon of the optical imaging lens group can be further reduced.

(AT34+AT45)/AT12

0.58 (3)。 The distance between the image side of the third lens and the object side of the fourth lens is AT34, the distance between the image side of the fourth lens and the object side of the fifth lens is AT45, and the image surface of the first lens is AT45. The distance between the sides of the two lenses is AT12, which satisfies the following relationship: 0.08

(AT34+AT45)/AT12

0.58 (3).

When the relationship (3) is satisfied, the distance relationship between the adjacent lenses between the first lens and the fifth lens can be controlled, so as to help adjust the overall volume of the optical imaging lens group.

｜R5/R6｜

4.2 (4)。 The radius of curvature of the object side of the third lens is R5, and the radius of curvature of the image side of the third lens is R6, which satisfies the following relationship: 0.7

｜R5/R6｜

4.2 (4).

When the relationship (4) is satisfied, the ratio between the radius of curvature R5 on the object side of the third lens and the radius of curvature R6 on the image side of the third lens can be controlled, which helps to correct the coma aberration of the optical imaging lens group.

R4*R8/R2

4.5 (5)。 The radius of curvature of the image side of the second lens is R4, the radius of curvature of the image side of the fourth lens is R8, and the radius of curvature of the image side of the first lens is R2, which satisfy the following relationship: 0.6

R4*R8/R2

4.5 (5).

When relational expression (5) is satisfied, the radius of curvature of the first lens image side can be controlled as R2, the radius of curvature of the second lens image side is R4 and the fourth lens image side is the proportional relationship between the radius of curvature R8, which helps Used to correct the coma aberration of the optical camera lens group.

f456/EFL

3.5 (6)。 The combined focal length of the fourth lens to the sixth lens is f456, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 2.0

f456/EFL

3.5 (6).

When the relationship (6) is satisfied, the optical imaging lens group can provide better imaging quality.

f12/EFL

1.5 (7)。 The combined focal length of the first lens to the second lens is f12, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.7

f12/EFL

1.5 (7).

When the relational expressions (6)-(7) are satisfied, the optical imaging lens group can provide better imaging quality.

EFL/(AT34+AT45)

5.5 (8)。 The distance between the image side of the third lens and the object side of the fourth lens is AT34, the distance between the image side of the fourth lens and the object side of the fifth lens is AT45, and the effective focal length of the optical imaging lens group is EFL , which satisfies the following relationship: 1.2

EFL/(AT34+AT45)

5.5 (8).

(T12+T34+T45)/TTL

0.3 (9)。 The distance between the image side of the first lens and the object side of the second lens is AT12, the distance between the image side of the third lens and the object side of the fourth lens is AT34, and the image side of the fourth lens is AT34. The distance from the side of the five-lens object is AT45, and the total length of the optical camera lens group is TTL, which satisfies the following relationship: -0.1

(T12+T34+T45)/TTL

0.3 (9).

R2/ImgH

1.5 (10)及0.8

(R1+R2)/TTL

1.7 (11)。 The radius of curvature of the first lens image side is R2, the radius of curvature of the first lens object side is R1, the imaging height of the optical imaging lens group is ImgH, and the total length of the optical imaging lens group is TTL, which is to satisfy the following relationship At least one of: 0.9

R2/ImgH

1.5 (10) and 0.8

(R1+R2)/TTL

1.7 (11).

t1/TTL

0.2 (12)、1.5

T1/T2

2.1 (13)、1.0

T2/T3

1.5 (14)及0.4

t2/AT12

1.1 (15)。 The radius of the first lens object side perpendicular to the optical axis is t1, the radius of the first lens image side perpendicular to the optical axis is t2, the total length of the optical camera lens group is TTL, and the first lens object side is perpendicular to the optical axis The diameter of the first lens is T1, the diameter of the first lens image side perpendicular to the optical axis is T2, the diameter of the second lens object side perpendicular to the optical axis is T3, and the distance between the first lens image side and the second lens object side is optical The distance on the axis is AT12, which satisfies at least one of the following relations: 0.1

t1/TTL

0.2 (12), 1.5

T1/T2

2.1 (13), 1.0

T2/T3

1.5 (14) and 0.4

t2/AT12

1.1 (15).

EFL/ImgH

1.0 (16)及5.0

TTL/ImgH

7.5 (17)。 The effective focal length of this optical imaging lens group is EFL, the imaging height of this optical imaging lens group is 1mgH, the total length of this optical imaging lens group is TTL, is to satisfy at least one of the following relational formulas: 0.5

EFL/ImgH

1.0 (16) and 5.0

TTL/ImgH

7.5 (17).

When at least one of the relational expressions (8) to (17) is satisfied, it can help to correct the astigmatic aberration of the optical imaging lens group and improve the thermal drift. Furthermore, when at least one of the relational expressions (8) to (17) is satisfied, the assembly flexibility of the optical imaging lens group can be significantly improved, thereby reducing the manufacturing difficulty of the optical imaging lens group.

first embodiment

Referring to FIG. 1A and FIG. 1B , FIG. 1A is a schematic diagram of an optical imaging lens group according to a first embodiment of the present invention. Fig. 1B is, from left to right, the astigmatism/field curvature diagram, distortion diagram (Distortion) and longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the first embodiment of the present invention.

As shown in Figure 1A, the optical imaging lens group 10 of the first embodiment includes a first lens 11, a second lens 12, a third lens 13, an aperture ST, a fourth lens 14, a fifth lens 15 and sixth lens 16 . The optical imaging lens group 10 can further include a filter element 17 and an imaging surface 18 . An image sensing element 100 can be further disposed on the imaging surface 18 to form an imaging device (not otherwise labeled).

The first lens 11 has a negative refractive power, the object side 11a is convex, the image side 11b is concave, and both the object side 11a and the image side 11b are spherical. The material of the first lens 11 is glass.

The second lens 12 has a negative refractive power, the object side 12a is concave, the image side 12b is concave, and both the object side 12a and the image side 12b are aspherical. The material of the second lens 12 is plastic.

The third lens 13 has a positive refractive power, the object side 13a is convex, the image side 13b is convex, and both the object side 13a and the image side 13b are spherical. The material of the third lens 13 is glass.

The fourth lens 14 has a positive refractive power, the object side 14a is convex, the image side 14b is convex, and both the object side 14a and the image side 14b are aspherical. The material of the fourth lens 14 is plastic.

The fifth lens 15 has negative refractive power, the object side 15a is concave, the image side 15b is convex, and both the object side 15a and the image side 15b are aspherical. The fifth lens 15 is made of glass.

The sixth lens 16 has a positive refractive power, the object side 16a is convex, the image side 16b is concave, and both the object side 16a and the image side 16b are aspherical. The material of the sixth lens 16 is plastic.

The filter element 17 is disposed between the sixth lens 16 and the imaging surface 18 to filter out light in a specific wavelength range, such as an IR filter. The two surfaces 17a, 17b of the filter element 17 are both flat and made of glass.

The image sensor 100 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Image Sensor (CMOS Image Sensor).

The curve equations of the above-mentioned aspheric surfaces are expressed as follows:

Among them, X: the distance between the point Y on the aspheric surface and the tangent plane of the aspheric surface on the optical axis; Y: the vertical distance between the point on the aspheric surface and the optical axis; C: the lens at the near optical axis The reciprocal of the radius of curvature; K: cone coefficient; and Ai: i-th order aspheric coefficient, where i=2x, and x is a natural number greater than and equal to 2, that is, i is an even number greater than and equal to 4.

Please refer to Table 1 below, which is the detailed optical data of the optical imaging lens group 10 according to the first embodiment of the present invention. Wherein, the object side 11a of the first lens 11 is marked as the surface 11a, and the image side 11b is marked as the surface 11b, and the other lens surfaces are deduced accordingly. The value in the distance column in the table represents the distance on the optical axis I from the surface to the next surface. For example, the distance from the object side 11a to the image side 11b of the first lens 11 is 0.413 mm, which means that the thickness of the first lens 11 is 0.413 mm. mm. The distance from the image side 11b of the first lens 11 to the object side 12a of the second lens 12 is 0.225 mm. Others can be deduced in a similar manner, and will not be repeated below. In the first embodiment, the effective focal length of the optical imaging lens group 10 is EFL, the aperture value (F-number) is Fno, half of the maximum viewing angle of the overall optical imaging lens group 10 is HFOV (Half Field of View), and its numerical value is also listed in Table 1.

Please refer to Table 2 below, which shows the aspheric coefficients of each lens surface in the first embodiment of the present invention. Among them, K is the cone coefficient in the aspheric curve equation, and A ₄ to A ₁₆ represent the 4th to 16th order aspheric coefficients of each surface. For example, the conic coefficient K of the object side surface 12a of the second lens 12 is -0.298. Others can be deduced in a similar manner, and will not be repeated below. In addition, the tables of the following embodiments are corresponding to the optical imaging lens groups of each embodiment, and the definitions of each table are the same as those of this embodiment, so they will not be repeated in the following embodiments.

In the first embodiment, the distance from the image side 13b of the third lens 13 to the object side 14a of the fourth lens 14 is AT34, the effective focal length of the optical imaging lens group 10 is EFL, and EFL/AT34=1.48.

In the first embodiment, the focal length of the first lens 11 is f1, the focal length of the second lens 12 is f2, and f1/f2=1.50.

In the first embodiment, the distance from the image side 13b of the third lens 13 to the object side 14a of the fourth lens 14 is AT34, and the distance from the image side 14b of the fourth lens 14 to the object side 15a of the fifth lens 15 is AT45 , the distance from the image side 11b of the first lens 11 to the object side 12a of the second lens 12 is AT12, (AT34+AT45)/AT12=0.57.

In the first embodiment, the radius of curvature of the object side 13a of the third lens 13 is R5, the radius of curvature of the image side 13b of the third lens 13 is R6, and |R5/R6|=0.77.

In the first embodiment, the radius of curvature of the image side 12b of the second lens 12 is R4, the radius of curvature of the image side 14b of the fourth lens 14 is R8, and the radius of curvature of the image side 11b of the first lens 11 is R2, R4 *R8/R2=4.23.

In the first embodiment, the combined focal length of the fourth lens 14 to the sixth lens 16 is f456, the effective focal length of the optical imaging lens group 10 is EFL, f456/EFL=2.32.

In the first embodiment, the combined focal length of the first lens 11 to the second lens 12 is f12, the effective focal length of the optical imaging lens group 10 is EFL, and f12/EFL=0.88.

In the first embodiment, the distance from the image side 13b of the third lens 13 to the object side 14a of the fourth lens 14 is AT34, and the distance from the image side 14b of the fourth lens 14 to the object side 15a of the fifth lens 15 is AT45 , the effective focal length of the optical imaging lens group 10 is EFL, EFL/(AT34+AT45)=1.40.

In the first embodiment, the distance from the image side 11b of the first lens 11 to the object side 12a of the second lens 12 is AT12, and the distance from the image side 13b of the third lens 13 to the object side 14a of the fourth lens 14 is AT34 , the distance from the image side 14b of the fourth lens 14 to the object side 15a of the fifth lens 15 is AT45, the total length of the 10 optical camera lens group is TTL, (T12+T34+T45)/TTL=0.25.

In the first embodiment, the radius of curvature of the image side 11b of the first lens 11 is R2, the radius of curvature of the object side 11a of the first lens 11 is R1, and the imaging height of the optical imaging lens group 10 is ImgH. The total length is TTL, R2/ImgH=1.14; and (R1+R2)/TTL=1.41.

In the first embodiment, the radius of the object side 11a of the first lens 11 perpendicular to the optical axis I is t1, the radius of the image side 11b of the first lens 11 perpendicular to the optical axis I is t2, and the total length of the optical imaging lens group 10 is TTL The diameter of the first lens 11 object side 11a perpendicular to the optical axis I is T1, the diameter of the first lens 11 image side 11b perpendicular to the optical axis I is T2, and the diameter of the second lens 12 object side 12a perpendicular to the optical axis I is T3, the distance from the first lens 11 image side 11b to the second lens 12 object side 12a on the optical axis I is AT12, t1/TTL=0.14; T1/T2=1.88; T2/T3=1.17; and t2/AT12= 0.46.

In the first embodiment, the effective focal length of the optical imaging lens group 10 is EFL, the imaging height of the optical imaging lens group 10 is ImgH, the total length of the optical imaging lens group 10 is TTL, EFL/ImgH=0.90; and TTL/ImgH= 7.08.

It can be seen from the values of the above relational expressions that the optical imaging lens assembly 10 of the first embodiment satisfies the requirements of the relational expressions (1) to (17).

Referring to FIG. 1B , from left to right in the figure are the astigmatism field curve diagram, F-θ distortion diagram and longitudinal spherical aberration diagram of the optical imaging lens group 10 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of three kinds of visible light wavelengths of 470nm, 555nm, and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.02mm. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the F-θ distortion rate of the optical imaging lens group 10 is less than ±50%. From the astigmatism and field curvature aberration diagram (wavelength 555nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within ±0.03mm; The variation is within ±0.05mm. As shown in FIG. 1B , the optical imaging lens group 10 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

second embodiment

Referring to FIG. 2A and FIG. 2B , FIG. 2A is a schematic diagram of an optical imaging lens group according to a second embodiment of the present invention. 2B is, from left to right, the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the second embodiment of the present invention.

As shown in Figure 2A, the optical imaging lens group 20 of the second embodiment includes a first lens 21, a second lens 22, a third lens 23, an aperture ST, a fourth lens 24, a fifth lens 25 and sixth lens 26 . The optical camera lens group 20 can further include a filter element 27 and an imaging surface 28 . An image sensing element 200 can be further disposed on the imaging surface 28 to form an imaging device (not labeled otherwise).

The first lens 21 has negative refractive power, the object side 21a is convex, the image side 21b is concave, and both the object side 21a and the image side 21b are spherical. The material of the first lens 21 is glass.

The second lens 22 has a negative refractive power, the object side 22 a is concave, the image side 22 b is concave, and both the object side 22 a and the image side 22 b are aspherical. The material of the second lens 22 is plastic.

The third lens 23 has a positive refractive power, the object side 23 a is convex, the image side 23 b is convex, and both the object side 23 a and the image side 23 b are spherical. The material of the third lens 23 is glass.

The fourth lens 24 has a positive refractive power, the object side 24a is convex, the image side 24b is convex, and both the object side 24a and the image side 24b are aspherical. The material of the fourth lens 24 is plastic.

The fifth lens 25 has negative refractive power. The object side 25 a is concave, the image side 25 b is convex, and both the object side 25 a and the image side 25 b are aspherical. The material of the fifth lens 25 is plastic.

The sixth lens 26 has a positive refractive power. The object side 26 a is convex, the image side 26 b is concave, and both the object side 26 a and the image side 26 b are aspherical. The material of the sixth lens 26 is plastic.

The filter element 27 is disposed between the sixth lens 26 and the imaging surface 28 to filter out light in a specific wavelength range, such as an IR filter. The two surfaces 27a, 27b of the filter element 27 are both flat and made of glass.

The image sensor 200 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Image Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 20 of the second embodiment are listed in Table 3 and Table 4 respectively. In the second embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment.

In the second embodiment, the values of the relational expressions of the optical imaging lens group 20 are listed in Table 5. It can be known from Table 5 that the optical imaging lens group 20 of the second embodiment satisfies the requirements of relational expressions (1) to (17).

Referring to FIG. 2B , from left to right in the figure are the astigmatic field curvature aberration diagram, F-θ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 20 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 555nm, and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the F-θ distortion rate of the optical imaging lens group 20 is less than ±50%. From the astigmatism and field curvature aberration diagram (wavelength 555nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within ±0.03mm; The variation is within ±0.05mm. As shown in Figure 2B It is shown that the optical imaging lens group 20 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

third embodiment

Referring to FIG. 3A and FIG. 3B , FIG. 3A is a schematic diagram of an optical imaging lens group according to a third embodiment of the present invention. FIG. 3B is, from left to right, the astigmatism/field curvature diagram, distortion diagram (Distortion) and longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the third embodiment of the present invention.

As shown in Figure 3A, the optical imaging lens group 30 of the third embodiment includes a first lens 31, a second lens 32, a third lens 33, an aperture ST, a fourth lens 34, a fifth lens 35 and sixth lens 36 . The optical imaging lens group 30 can further include a filter element 37 and an imaging surface 38 . An image sensing element 300 can be further disposed on the imaging surface 38 to form an imaging device (not labeled otherwise).

The first lens 31 has a negative refractive power, the object side 31 a is convex, the image side 31 b is concave, and both the object side 31 a and the image side 31 b are spherical. The material of the first lens 31 is glass.

The second lens 32 has a negative refractive power, the object side 32 a is concave, the image side 32 b is concave, and both the object side 32 a and the image side 32 b are aspherical. The material of the second lens 32 is plastic.

The third lens 33 has a positive refractive power, the object side 33a is convex, the image side 33b is convex, and both the object side 33a and the image side 33b are spherical. The material of the third lens 33 is glass.

The fourth lens 34 has a positive refractive power, the object side 34a is convex, the image side 34b is convex, and both the object side 34a and the image side 34b are aspherical. The material of the fourth lens 34 is plastic.

The fifth lens 35 has negative refractive power. The object side 35 a is convex, the image side 35 b is concave, and both the object side 35 a and the image side 35 b are aspherical. The material of the fifth lens 35 is plastic.

The sixth lens 36 has a positive refractive power. The object side 36 a is convex, the image side 36 b is convex, and both the object side 36 a and the image side 36 b are aspherical. The sixth lens 36 is made of plastic.

The filter element 37 is disposed between the sixth lens 36 and the imaging surface 38 to filter out light in a specific wavelength range, such as an IR filter. The two surfaces 37a, 37b of the filter element 37 are both flat and made of glass.

The image sensor 300 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Image Sensor (CMOS Image Sensor).

The detailed optical data and the aspheric coefficient of the lens surface of the optical imaging lens group 30 of the third embodiment are listed in Table 6 and Table 7 respectively. In the third embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment.

表六

Table six

In the third embodiment, the values of the relational expressions of the optical imaging lens group 30 are listed in Table 8. It can be known from Table 8 that the optical imaging lens group 30 of the third embodiment satisfies the requirements of relational expressions (1) to (17).

Referring to FIG. 3B , from left to right in the figure are the astigmatism field curve diagram, F-θ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 30 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 555nm, and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the F-θ distortion rate of the optical imaging lens group 30 is less than ±2.5%. From the astigmatism and field curvature aberration diagram (wavelength 555nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within ±0.03mm; The variation is within ±0.05mm. As shown in FIG. 3B , the optical imaging lens group 30 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Fourth embodiment

Referring to FIG. 4A and FIG. 4B , FIG. 4A is a schematic diagram of an optical imaging lens group according to a fourth embodiment of the present invention. 4B is, from left to right, the astigmatism/field curvature diagram (Astigmatism/Field Curvature), distortion diagram (Distortion) and longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the fourth embodiment of the present invention.

As shown in Figure 4A, the optical imaging lens group 40 of the fourth embodiment includes a first lens 41, a second lens 42, a third lens 43, an aperture ST, a fourth lens 44, a fifth lens 45 and sixth lens 46 . This optical camera lens group 40 can further include filter element 47 and imaging surface 48. An image sensing element 400 can be further disposed on the imaging surface 48 to form an imaging device (not labeled otherwise).

The first lens 41 has negative refractive power, the object side 41a is convex, the image side 41b is concave, and both the object side 41a and the image side 41b are spherical. The material of the first lens 41 is glass.

The second lens 42 has a negative refractive power, the object side 42a is concave, the image side 42b is concave, and both the object side 42a and the image side 42b are aspherical. The material of the second lens 42 is plastic.

The third lens 43 has a positive refractive power, the object side 43a is convex, the image side 43b is convex, and both the object side 43a and the image side 43b are spherical. The material of the third lens 43 is glass.

The fourth lens 44 has a positive refractive power, the object side 44a is convex, the image side 44b is convex, and both the object side 44a and the image side 44b are aspherical. The material of the fourth lens 44 is plastic.

The fifth lens 45 has a negative refractive power, the object side 45a is concave, the image side 45b is concave, and both the object side 45a and the image side 45b are aspherical. The material of the fifth lens 45 is plastic.

The sixth lens 46 has a positive refractive power. The object side 46 a is convex, the image side 46 b is convex, and both the object side 46 a and the image side 46 b are aspherical. The material of the sixth lens 46 is plastic.

The filter element 47 is disposed between the sixth lens 46 and the imaging surface 48 to filter out light in a specific wavelength range, such as an IR filter. The two surfaces 47a, 47b of the filter element 47 are both flat and made of glass.

The image sensor 400 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Image Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 40 of the fourth embodiment are listed in Table 9 and Table 10, respectively. In the fourth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment.

In the fourth embodiment, the values of the relational expressions of the optical imaging lens group 40 are listed in Table 11. It can be seen from Table 11 that the optical imaging lens group 40 of the fourth embodiment satisfies the requirements of relational expressions (1) to (17).

Referring to FIG. 4B , from left to right in the figure are the astigmatism field curve diagram, F-θ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 40 . It can be seen from the longitudinal spherical aberration diagram that the three kinds of off-axis rays with wavelengths of 470nm, 555nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.04mm. From the F-θ distortion aberration diagram (wavelength 555nm), it can be seen that the optical The F-θ distortion rate of the imaging lens group 40 is less than ±10%. From the astigmatism and field curvature aberration diagram (wavelength 555nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within ±0.02mm; The variation is within ±0.03mm. As shown in FIG. 4B , the optical imaging lens group 40 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

fifth embodiment

Referring to FIG. 5A and FIG. 5B , FIG. 5A is a schematic diagram of an optical imaging lens group according to a fifth embodiment of the present invention. FIG. 5B is, from left to right, the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the fifth embodiment of the present invention.

As shown in FIG. 5A, the optical imaging lens group 50 of the fifth embodiment includes a first lens 51, a second lens 52, a third lens 53, an aperture ST, a fourth lens 54, and a fifth lens in sequence from the object side to the image side. lens 55 and sixth lens 56 . The optical imaging lens group 50 may further include a filter element 57 and an imaging surface 58 . An image sensing element 500 can be further disposed on the imaging surface 58 to form an imaging device (not labeled otherwise).

The first lens 51 has negative refractive power, the object side 51a is convex, the image side 51b is concave, and both the object side 51a and the image side 51b are aspherical. The material of the first lens 51 is glass.

The second lens 52 has a negative refractive power, the object side 52 a is concave, the image side 52 b is concave, and both the object side 52 a and the image side 52 b are aspherical. The material of the second lens 52 is plastic.

The third lens 53 has positive refractive power, the object side 53 a is convex, the image side 53 b is convex, and both the object side 53 a and the image side 53 b are spherical. The material of the third lens 53 is glass.

The fourth lens 54 has a positive refractive power, the object side 54a is convex, the image side 54b is convex, and both the object side 54a and the image side 54b are aspherical. The material of the fourth lens 54 is plastic.

The fifth lens 55 has a negative refractive power, the object side 55 a is concave, the image side 55 b is concave, and both the object side 55 a and the image side 55 b are aspherical. The material of the fifth lens 55 is plastic.

The sixth lens 56 has a positive refractive power, its object side 56 a is convex, its image side 56 b is convex, and both the object side 56 a and the image side 56 b are aspherical. The material of the sixth lens 56 is plastic.

The filter element 57 is disposed between the sixth lens 56 and the imaging surface 58 to filter out light in a specific wavelength range, such as an IR filter. The two surfaces 57a, 57b of the filter element 57 are both flat and made of glass.

The image sensor 500 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Image Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 50 of the fifth embodiment are listed in Table 12 and Table 13, respectively. In the fifth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment.

In the fifth embodiment, the values of the relational expressions of the optical imaging lens group 50 are listed in Table 14. It can be known from Table 14 that the optical imaging lens group 50 of the fifth embodiment satisfies the requirements of relational expressions (1) to (17).

Referring to FIG. 5B , from left to right in the figure are the astigmatism field curve diagram, F-θ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 50 . It can be seen from the longitudinal spherical aberration diagram that the three kinds of off-axis rays with wavelengths of 470nm, 555nm and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.04mm. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the F-θ distortion rate of the optical imaging lens group 50 is less than ±10%. From the astigmatism and field curvature aberration diagram (wavelength 555nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within ±0.02mm; The variation is within ±0.02mm. As shown in FIG. 5B , the optical imaging lens group 50 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Sixth embodiment

Referring to FIG. 6A and FIG. 6B , FIG. 6A is a schematic diagram of an optical imaging lens group according to a sixth embodiment of the present invention. Fig. 6B is, from left to right, the diagram of Longitudinal Spherical Aberration, Astigmatism/Field Curvature and Distortion of the sixth embodiment of the present invention.

As shown in FIG. 6A, the optical imaging lens group 60 of the sixth embodiment includes a first lens 61, a second lens 62, a third lens 63, an aperture ST, a fourth lens 64, and a fifth lens in sequence from the object side to the image side. lens 65 and sixth lens 66 . The optical imaging lens group 60 can further include a filter element 67 and an imaging surface 68 . An image sensing element 600 can be further disposed on the imaging surface 68 to form an imaging device (not labeled otherwise).

The first lens 61 has a negative refractive power, the object side 61a is convex, the image side 61b is concave, and both the object side 61a and the image side 61b are spherical. The material of the first lens 61 is glass.

The second lens 62 has a negative refractive power. The object side 62 a is convex, the image side 62 b is concave, and both the object side 62 a and the image side 62 b are aspherical. The material of the second lens 62 is plastic.

The third lens 63 has positive refractive power, the object side 63 a is convex, the image side 63 b is convex, and both the object side 63 a and the image side 63 b are aspherical. The material of the third lens 63 is plastic.

The fourth lens 64 has a positive refractive power, the object side 64 a is convex, the image side 64 b is convex, and both the object side 64 a and the image side 64 b are aspherical. The material of the fourth lens 64 is glass.

The fifth lens 65 has a negative refractive power, the object side 65 a is concave, the image side 65 b is concave, and both the object side 65 a and the image side 65 b are aspherical. The material of the fifth lens 65 is plastic.

The sixth lens 66 has a positive refractive power, the object side 66a is convex, the image side 66b is convex, and both the object side 66a and the image side 66b are aspherical. The material of the sixth lens 66 is plastic.

The filter element 67 is disposed between the sixth lens 66 and the imaging surface 68 to filter out light in a specific wavelength range, such as an IR filter. The two surfaces 67a, 67b of the filter element 67 are both flat and made of glass.

The image sensing device 600 is, for example, a Charge-Coupled Device (CCD) Image Sensor or a Complementary Metal Oxide Semiconductor Image Sensor (CMOS Image Sensor).

The detailed optical data and aspheric coefficients of the lens surface of the optical imaging lens group 60 of the sixth embodiment are listed in Table 15 and Table 16, respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment.

In the sixth embodiment, the values of the relational expressions of the optical imaging lens group 60 are listed in Table 17. It can be seen from Table 17 that the optical imaging lens group 60 of the sixth embodiment satisfies the requirements of relational expressions (1) to (17).

Referring to FIG. 6B , from left to right in the figure are the astigmatism field curve diagram, F-θ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 60 . It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470nm, 555nm, and 650nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within ±0.03mm. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the F-θ distortion rate of the optical imaging lens group 60 is less than ±5%. From the astigmatism and field curvature aberration diagram (wavelength 555nm), it can be seen that the focal length variation of the sagittal direction aberration in the entire field of view is within ±0.02mm; The variation is within ±0.05mm. As shown in FIG. 6B , the optical imaging lens group 60 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system.

Seventh embodiment

The seventh embodiment of the present invention is an imaging device, which includes the optical imaging lens group as in the aforementioned first to sixth embodiments, and an image sensing element; wherein, the image sensing element is arranged on the optical imaging lens The imaging surface of the group. The image sensing device is, for example, a Charge-Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensing device.

Eighth embodiment

Referring to FIG. 7 , it shows an electronic device 1000 according to the eighth embodiment of the present invention, and the electronic device 1000 includes the imaging device 1010 of the seventh embodiment.

Although the present invention has been described using the preceding several examples, these examples are not intended to limit the scope of the present invention. For anyone skilled in the art, without departing from the spirit and scope of the present invention, various changes in form and details can still be made with reference to the disclosed embodiments of the present invention. Therefore, what needs to be understood here is that the present invention is defined by the scope of the following patent applications, and any Various changes made within the scope of the patent application or within the scope of equivalents should still fall within the scope of the patent application of the present invention.

10: Optical camera lens group

11: First lens

12: Second lens

13: Third lens

14: Fourth lens

15: fifth lens

16: sixth lens

17: Filter element

18: Imaging surface

11a: The side of the object of the first lens

11b: The image side of the first lens

12a: The side of the second lens

12b: The image side of the second lens

13a: The side of the third lens

13b: The image side of the third lens

14a: The side of the fourth lens

14b: The image side of the fourth lens

15a: The side of the fifth lens

15b: The image side of the fifth lens

16a: The side of the sixth lens

16b: The image side of the sixth lens

17a, 17b: two surfaces of the filter element

100: Image sensing element

I: optical axis

ST: Aperture

Claims (16)

An optical imaging lens group, which comprises sequentially from the object side to the image side: a first lens with negative refraction power and a convex surface on the object side; a second lens with refraction power and a concave image side; a third lens a lens with refractive power, and its image side is convex; a diaphragm; a fourth lens with positive refractive power, and its object side is convex; a fifth lens with refractive power; and a sixth lens with positive refractive power , its object side is a convex surface; wherein, the total number of lenses of the optical imaging lens group is six pieces; the distance from the image side of the third lens to the object side of the fourth lens is AT34, and the effective focal length of the optical imaging lens group is EFL, the distance from the image side of the fourth lens to the object side of the fifth lens is AT45, and the distance from the image side of the first lens to the object side of the second lens is AT12, which satisfies the following relationship: 1.0

EFL/AT34

10.5; and 0.08

(AT34+AT45)/AT12

0.58. For example, the optical imaging lens group of item 1 of the scope of the patent application, wherein the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following relationship: 0.9

f1/f2

2.5. For example, the optical imaging lens group of item 1 of the scope of application, wherein the radius of curvature of the object side of the third lens is R5, and the radius of curvature of the image side of the third lens is R6, which satisfy the following relationship: 0.7

｜R5/R6｜

4.2. Such as the optical imaging lens group of item 1 of the scope of application, wherein the radius of curvature of the image side of the second lens is R4, the radius of curvature of the image side of the fourth lens is R8, and the curvature of the image side of the first lens is The radius is R2, which satisfies the following relationship: 0.6

R4*R8/R2

4.5. An optical imaging lens group, comprising in sequence from the object side to the image side: a first lens with negative refraction power and a convex surface on the object side; a second lens with negative refraction power and a concave image side; Three lenses, with refractive power, and its image side is convex; a diaphragm; a fourth lens, with positive refractive power, and its object side is convex; a fifth lens, with refractive power; and a sixth lens, with positive refractive power Force, its object side is a convex surface; wherein, the total number of lenses in the optical imaging lens group is six pieces; the focal length of the first lens is f1, the focal length of the second lens is f2, and the image side of the third lens reaches the first The distance between the object side of the four lenses is AT34, the distance between the image side of the fourth lens and the object side of the fifth lens is AT45, and the distance between the image side of the first lens and the object side of the second lens is AT12, The system satisfies the following relationship: 0.9

f1/f2

2.5; and 0.08

(AT34+AT45)/AT12

0.58. For example, the optical imaging lens group of item 5 of the patent scope, wherein the combined focal length of the fourth lens to the sixth lens is f456, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 2.0

f456/EFL

3.5. For example, the optical imaging lens group of item 5 of the patent scope, wherein the combined focal length of the first lens to the second lens is f12, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0.7

f12/EFL

1.5. Such as the optical imaging lens group of item 5 of the scope of the patent application, wherein the distance from the image side of the third lens to the object side of the fourth lens is AT34, and the distance from the image side of the fourth lens to the object side of the fifth lens The distance is AT45, and the effective focal length of the optical camera lens group is EFL, which satisfies the following relationship: 1.2

EFL/(AT34+AT45)

5.5. Such as the optical imaging lens group of item 5 of the scope of the patent application, wherein the distance from the image side of the first lens to the object side of the second lens is AT12, and the image side of the third lens to the object side of the fourth lens The distance is AT34, the distance from the image side of the fourth lens to the object side of the fifth lens is AT45, and the total length of the optical camera lens group is TTL, which satisfies the following relationship: -0.1

(T12+T34+T45)/TTL

0.3. Such as the optical imaging lens group of item 1 or item 5 of the scope of patent application, wherein the radius of curvature of the image side of the first lens is R2, the radius of curvature of the object side of the first lens is R1, and the imaging of the optical imaging lens group The height is ImgH, and the total length of the optical imaging lens group is TTL, which satisfies at least one of the following relational expressions: 0.9

R2/ImgH

1.5 and 0.8

(R1+R2)/TTL

1.7. Such as the optical imaging lens group of item 1 or item 5 of the scope of the patent application, wherein the radius of the object side of the first lens perpendicular to the optical axis is t1, and the radius of the image side of the first lens perpendicular to the optical axis is t2. The total length of the optical camera lens group is TTL, the diameter of the first lens object side perpendicular to the optical axis is T1, the diameter of the first lens image side perpendicular to the optical axis is T2, and the diameter of the second lens object side perpendicular to the optical axis The diameter is T3, the distance from the image side of the first lens to the object side of the second lens on the optical axis is AT12, which satisfies at least one of the following relational expressions: 0.1

t1/TTL

0.2, 1.5

T1/T2

2.1, 1.0

T2/T3

1.5 and 0.4

t2/AT12

1.1. Such as the optical imaging lens group of item 1 or item 5 of the patent scope, wherein, the effective focal length of the optical imaging lens group is EFL, the imaging height of the optical imaging lens group is ImgH, and the total length of the optical imaging lens group is TTL , which satisfies at least one of the following relations: 0.5

EFL/ImgH

1.0 and 5.0

TTL/ImgH

7.5. Such as the optical imaging lens group of item 1 or item 5 of the scope of patent application, wherein the optical imaging lens group meets at least one of the following conditions: the object side of the second lens is a convex surface, The object side of the fifth lens is convex, the image side of the fifth lens is convex, and the image side of the sixth lens is convex. The optical imaging lens group of item 1 or item 5 of the scope of patent application, wherein the optical imaging lens group satisfies at least one of the following conditions: the object side of the second lens is a concave surface, the object of the fifth lens The side surface is concave, the image side of the fifth lens is concave, and the image side of the sixth lens is concave. An imaging device, which includes the optical imaging lens group as claimed in item 1 or item 5 of the scope of the patent application, and an image sensing element, wherein the image sensing element is arranged on the imaging surface of the optical imaging lens group. An electronic device, which includes the imaging device described in item 15 of the scope of the patent application.

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