TWI807883B - Optical imaging lens, imaging device and electronic device - Google Patents

Abstract

An optical imaging lens includes, from object side to 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 object-side surface being convex; the fourth lens has positive refractive power; the fifth lens has negative refractive power and includes an image-side surface being concave; the sixth lens has refractive power. When specific conditions are satisfied, the optical imaging lens can have good thermal stability 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 general electronic devices, vehicle electronic devices or driving photography devices, and an imaging device and an electronic device with the optical imaging lens group.

With the improvement of the manufacturing level of photographic imaging devices, their application fields are becoming more and more diverse, such as mobile devices, drones, and vehicle devices. Take the car device as an example. In the early days, an external driving recorder was connected to the vehicle power supply. When the vehicle was started, the driving recorder would automatically turn on and start recording the traffic conditions within the field of vision. In recent years, in order to improve the safety of the vehicle, relevant companies have invested in the development of self-driving cars, that is, installing various sensors on the vehicle to detect the environmental conditions. Among them, in addition to being used to record traffic conditions, the optical lens can also be used with image recognition and intelligent computing to improve the driving safety and comfort of the vehicle in various environments. For example, the use of optical photography equipment with image recognition and intelligent computing functions in the car can be used to monitor the state of driving concentration, prevent the driver from leaving the front of the vehicle, or give instant warnings when the driver’s mental state is not good, thereby improving the safety of driving vehicles.

In addition to automotive electronic devices, in other application fields, the specification requirements of photographic imaging devices are also increasing, that is, users not only require clear images, but also require a wider field of view and good thermal stability to meet the needs of various climates and use environments. Therefore, how to provide an optical imaging device with good imaging quality and resistance to environmental temperature changes has become a problem that people in this technical field want to solve urgently.

Therefore, in order to solve the above problems, 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. Among them, the first lens has negative refractive power, and its object side is convex; the second lens has refractive power, and its image side is concave; the third lens has refractive power, and its object side is convex; the fourth lens has positive refractive power; the fifth lens has negative refractive power, and its image side is concave; the sixth lens has refractive power. The total number of lenses in the optical imaging lens group is six pieces; the distance from the image side of the third lens to the aperture along the optical axis is AT3o, and the distance from the aperture to the object side of the fourth lens along the optical axis is ATo4, satisfying the following relationship: ∣AT3o/ATo4∣≤25.00.

According to an embodiment of the present invention, the radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side of the second lens is R4, which satisfy the following relationship: |R3/R4| ≤ 75.00.

According to an embodiment of the present invention, the combined focal length from the fourth lens to the fifth lens is f45, and the combined focal length from the first lens to the third lens is f123, which satisfy the following relationship: -20.00 ≤ f45/f123 ≤ -5.00.

The present invention further provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from the object side to the image side. Among them, the first lens has negative refractive power; the second lens has negative refractive power; the third lens has refractive power, and its image side is convex; the fourth lens has positive refractive power; the fifth lens has refractive power; the sixth lens has positive refractive power. The total number of lenses in the optical imaging lens group is six pieces; the radius of curvature of the image side of the first lens is R2, and the radius of curvature of the object side of the second lens is R3, which satisfy the following relationship: |R3/R2| ≤ 30.00.

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 along the optical axis is AT12, and the distance from the image side of the second lens to the object side of the third lens along the optical axis is AT23, which satisfies the following relationship: 1.00 ≤ AT23/AT12 ≤ 2.00.

According to an embodiment of the present invention, the combined focal length of the fourth lens to the fifth lens is f45, and the focal length of the sixth lens is f6, which satisfy the following relationship: -30.00 ≤ f45/f6 ≤ -8.00.

According to an embodiment of the present invention, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the combined focal length from the first lens to the third lens is f123, which satisfies the following relationship: 0.50 ≤ (CT1+CT2+CT3)/f123 ≤ 6.00.

According to an embodiment of the present invention, the focal length of the first lens is f1, the focal length of the third lens is f3, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: ∣ (1/f1)+(1/f3)∣*EFL ≤ 0.15.

According to an embodiment of the present invention, the radius of the image side of the first lens perpendicular to the optical axis is D2, and the radius of curvature of the image side of the first lens is R2, which satisfy the following relationship: 0.70 ≤ D2/R2 ≤ 1.00.

According to an embodiment of the present invention, the maximum image height ImgH of the optical imaging lens group, and the total length of the optical imaging lens group is TTL, satisfying the following relationship: 11.00 ≤ TTL/ImgH ≤ 15.0.

According to an embodiment of the present invention, the object side surface of the second lens is concave at the paraxial position.

According to an embodiment of the present invention, the fourth lens and the fifth lens are combined to form a composite lens.

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.

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, due to the temperature resistance and high hardness of the glass material itself, the impact of environmental changes on the optical camera lens group can be reduced, thereby prolonging the service life of the optical camera 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 (paraxial). For example, when the object side of a lens is described as convex, it means that the object side of the lens near the optical axis is convex. That is, although the lens surface is described as convex in the embodiments, the surface may be convex or concave in the area away from the optical axis (off-axis). The shape of each lens at the paraxial position is judged by whether the radius of curvature of the surface is positive or negative. For example, if the radius of curvature of the side surface of a lens is positive, the side of the object is convex; otherwise, 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, the surface of some optical lenses uses a spherical surface, it can still be designed as an aspheric surface as required; or, the surface of some optical lenses uses an aspheric surface, but it can still be designed as a spherical surface as required.

In an 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 plane 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 half of the diagonal length of the effective sensing area of the image sensing element. In the following embodiments, the units of the radius of curvature, lens thickness, distance between lenses, total lens group 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 total number of lenses in the optical imaging lens group is six.

The first lens has negative refractive power, its image side is concave, and its object side is convex, so as to meet the actual application requirements and help to collect light. Preferably, the first lens is made of glass, which is suitable for environmental conditions with large temperature differences. 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 second lens has negative refractive power and is used to adjust the light path. The image side of the second lens is concave, and the object side can be convex or concave. Preferably, the material of the second lens is plastic, so as to reduce manufacturing cost and facilitate processing. In addition, the object side or/and the image side of the second lens can be aspherical, so as to improve spherical aberration.

The third lens has positive refractive power, its object side is convex, and its image side is convex. Utilizing the positive refractive power of the third lens helps to gather light and correct astigmatic aberration. By adjusting the relationship between the focal length of the third lens and the first lens and other optical parameters, the thermal drift of the focal plane of the optical imaging lens group can be effectively compensated, and the thermal stability can be improved. In the embodiment of the present invention, the material of the third lens is glass, which is applicable to the environmental conditions with large temperature difference. 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.

The fourth lens has positive refractive power, its object side is convex, and its image side is convex. Utilizing the positive refractive power of the fourth lens helps to gather light and correct astigmatic aberration. In the embodiment of the present invention, the material of the fourth lens is glass, which is suitable for environmental conditions with large temperature difference. In an embodiment of the present invention, the object side or/and the image side of the fourth lens are spherical to reduce manufacturing cost and facilitate processing.

The fifth lens has negative refractive power. Both the object side and the image side of the fifth lens are concave. Utilizing the negative refractive power of the fifth lens helps to adjust the light path. Preferably, the material of the fifth lens is glass, which is suitable for environmental conditions with large temperature differences. In an embodiment of the present invention, the object side and/or the image side of the fifth lens are spherical to reduce manufacturing cost and facilitate processing. In an embodiment of the present invention, the fourth lens and the fifth lens are combined to form a composite lens. For example, the image side of the fourth lens and the object side of the fifth lens are bonded to each other by optical glue, so as to adapt to environmental conditions with large temperature differences, and can significantly improve the thermal drift of the focal plane of the optical imaging lens group. In another embodiment of the present invention, the fourth lens and the fifth lens are independent without glue, so as to reduce manufacturing cost and facilitate processing.

The sixth lens has positive refractive power. The object side of the sixth lens is convex, and its image side is convex. The positive refractive power of the sixth lens helps to gather light and improve astigmatic aberration. Preferably, the sixth lens is made of plastic to reduce manufacturing cost and facilitate processing. In addition, the object side or/and the image side of the sixth lens can be aspherical, so as to improve spherical aberration.

The distance from the image side of the third lens to the aperture along the optical axis is AT3o, and the distance from the aperture to the object side of the fourth lens along the optical axis is ATo4, which satisfy the following relationship: |AT3o/ATo4| ≤ 25.00 (1).

When the relational expression (1) is satisfied, better imaging quality can be provided, and the design flexibility of the optical imaging lens group can be enhanced.

The radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side of the second lens is R4, which satisfy the following relationship: |R3/R4| ≤ 75.00 (2).

The combined focal length from the fourth lens to the fifth lens is f45, and the combined focal length from the first lens to the third lens is f123, which satisfy the following relationship: -20.00 ≤ f45/f123 ≤ -5.00 (3).

When relational expressions (2) and (3) are satisfied, the optical imaging lens group can effectively improve the thermal drift of the optical imaging lens group and provide better imaging quality.

The radius of curvature of the image side of the first lens is R2, and the radius of curvature of the object side of the second lens is R3, which satisfy the following relationship: ∣R3/R2∣ ≤ 30.00 (4).

When the relationship (4) is satisfied, the thermal drift of the optical imaging lens group can be effectively improved, and the design flexibility of the optical imaging lens group can be enhanced.

The distance from the image side of the first lens to the object side of the second lens along the optical axis is AT12, and the distance from the image side of the second lens to the object side of the third lens along the optical axis is AT23, which satisfy the following relationship: 1.00 ≤ AT23/AT12 ≤ 2.00 (5).

When relational expression (5) is satisfied, the optical imaging lens group can provide better imaging quality.

The combined focal length of the fourth lens to the fifth lens is f45, and the focal length of the sixth lens is f6, which satisfy the following relationship: -30.00 ≤ f45/f6 ≤ -8.00 (6).

When the relationship (6) is satisfied, it is helpful to improve the thermal stability of the optical imaging lens group.

The thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the combined focal length from the first lens to the third lens is f123, which satisfies the following relationship: 0.50 ≤ (CT1+CT2+CT3)/f123 ≤ 6.00 (7).

The focal length of the first lens is f1, the focal length of the third lens is f3, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: ∣ (1/f1)+(1/f3)∣*EFL ≤ 0.15 (8).

When the relational expressions (7) and (8) are satisfied, the thermal drift of the optical imaging lens group can be effectively improved, and the focal length range of the lenses of the optical imaging lens group can be flexibly changed, so as to improve the design flexibility of the optical imaging lens group.

The radius of the image side of the first lens perpendicular to the optical axis is D2, and the radius of curvature of the image side of the first lens is R2, which satisfy the following relationship: 0.70 ≤ D2/R2 ≤ 1.00 (9).

The maximum image height of the optical imaging lens group is ImgH, and the total length of the optical imaging lens group is TTL, which satisfies the following relationship: 11.00 ≤ TTL/ImgH ≤ 15.00 (10).

When the relational expressions (9) to (10) are satisfied, the optical imaging lens group can provide better imaging quality and help to correct the coma aberration 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, Distortion, and Longitudinal Spherical Aberration diagrams of the first embodiment of the present invention.

As shown in FIG. 1A , the optical imaging lens group 10 of the first embodiment includes a first lens 11 , a second lens 12 , a third lens 13 , a diaphragm ST, a fourth lens 14 , a fifth lens 15 and a sixth lens 16 from the object side to the image side. The optical imaging lens group 10 can further include a filter element 17 , a protective glass 18 and an imaging surface 19 . An image sensing element 100 can be further disposed on the imaging surface 19 to form an imaging device (not labeled otherwise).

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 includes glass, but not limited thereto.

The second lens 12 has negative refractive power. The object side 12 a is convex, the image side 12 b is concave, and both the object side 12 a and the image side 12 b are aspherical. The material of the second lens 12 includes plastic, but it is not limited thereto.

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 includes glass, but not limited thereto.

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 spherical. The material of the fourth lens 14 includes glass, but not limited thereto.

The fifth lens 15 has negative refractive power, the object side 15a is concave, the image side 15b is concave, and both the object side 15a and the image side 15b are spherical. The material of the fifth lens 15 includes glass, but not limited thereto. The image side 14b of the fourth lens 14 and the object side 15b of the fifth lens 15 are cemented together, so that the fourth lens 14 and the fifth lens 15 are combined to form a compound lens.

The sixth lens 16 has a positive refractive power, the object side 16a is convex, the image side 16b is convex, and both the object side 16a and the image side 16b are aspherical. The material of the sixth lens 16 includes plastic, but it is not limited thereto.

The filter element 17 is disposed between the sixth lens 16 and the imaging surface 19 to filter out light in a specific wavelength range, such as an infrared filter element. The two surfaces 17a, 17b of the filter element 17 are both flat and made of glass.

The protective glass 18 is disposed between the filter element 17 and the imaging surface 19 to protect the imaging surface 19 . The two surfaces 18a, 18b of the protective glass 18 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 on the aspheric surface whose distance from the optical axis is Y 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 reciprocal of the radius of curvature of the lens at the near optical axis;

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 1.500 mm, which means that the thickness of the first lens 11 is 1.500 mm. The distance from the image side 11b of the first lens 11 to the object side 12a of the second lens 12 is 3.420 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 values are also listed in Table 1. first embodiment EFL= 1.31 mm , Fno = 2.04 , HFOV = 90 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 11a sphere 16.924 1.500 1.834 37.3 -9.84 11b sphere 5.320 3.420 second lens 12a Aspherical 146.760 1.300 1.537 56.0 -3.84 12b Aspherical 2.033 5.678 third lens 13a sphere 6.936 1.402 1.717 29.5 7.00 13b sphere -17.006 1.941 aperture ST unlimited 1.252 fourth lens 14a sphere 4.953 1.591 1.806 40.7 2.53 14b sphere -3.001 glued fifth lens 15a sphere -3.001 0.924 1.923 20.9 -1.85 15b sphere 4.669 0.299 sixth lens 16a Aspherical 3.202 1.928 1.537 56.0 3.82 16b Aspherical -4.553 0.150 filter element 17a flat unlimited 0.300 1.517 64.2 17b flat unlimited 2.000 protective glass 18a flat unlimited 0.500 1.517 64.2 18b flat unlimited 0.050 imaging surface 19 flat unlimited Reference wavelength: 555 nm Table I

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 -14.7. 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. Aspheric coefficient of the first embodiment surface 12a 12b 16a 16b K 8.99E+01 -7.11E-01 -2.88E+00 -3.93E-01 A ₄ -2.81E-04 -3.54E-04 2.17E-03 2.60E-03 A ₆ -2.03E-14 1.19E-13 -3.22E-05 -1.14E-13 A ₈ 4.82E-19 -5.75E-18 -4.07E-16 -3.82E-15 A ₁₀ 6.98E-22 7.81E-18 7.21E-16 -5.99E-15 A ₁₂ -4.39E-23 -3.59E-19 -9.82E-17 -4.17E-16 A ₁₄ -8.56E-24 -8.09E-20 -2.66E-17 -3.77E-17 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Table II

In the first embodiment, the distance from the third lens image side along the optical axis to the aperture is AT3o, and the distance from the aperture to the object side of the fourth lens along the optical axis is ATo4, AT3o/ATo4=1.55.

In the first embodiment, the radius of curvature of the object side of the second lens is R3, the radius of curvature of the image side of the second lens is R4, and R3/R4=72.20.

In the first embodiment, the combined focal length of the fourth lens to the fifth lens is f45, the combined focal length of the first lens to the third lens is f123, f45/f123 = -4.30.

In the first embodiment, the radius of curvature of the image side of the first lens is R2, the radius of curvature of the object side of the second lens is R3, and R3/R2 = 27.59.

In the first embodiment, the distance from the image side of the first lens to the object side of the second lens along the optical axis is AT12, the distance from the image side of the second lens to the object side of the third lens along the optical axis is AT23, AT23/AT12=1.66.

In the first embodiment, the combined focal length of the fourth lens to the fifth lens is f45, the focal length of the sixth lens is f6, f45/f6=-8.87.

In the first embodiment, the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, the combined focal length from the first lens to the third lens is f123, (CT1+CT2+CT3)/f123=0.53.

In the first embodiment, the focal length of the first lens is f1, the focal length of the third lens is f3, the effective focal length of the optical imaging lens group is EFL, (1/f1)+(1/f3)|*EFL=0.05.

In the first embodiment, the radius of the image side of the first lens perpendicular to the optical axis is D2, the radius of curvature of the image side of the first lens is R2, and D2/R2 = 0.91.

In the first embodiment, the maximum image height of the optical imaging lens group is ImgH, the total length of the optical imaging lens group is TTL, and TTL/ImgH=11.34.

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 (10).

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 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the variation of the aberration in the sagittal direction is within + 0.06 mm within the entire field of view; the variation of the aberration in the meridian direction is within + 0.03 mm within the entire field of view. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-θ distortion rate of the optical imaging lens group 10 is less than 6%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470 nm, 555 nm, and 650 nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.02 mm. 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. FIG. 2B is, from left to right, the astigmatism/Field Curvature diagram, the distortion diagram (Distortion) and the longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the second embodiment of the present invention.

As shown in FIG. 2A , the optical imaging lens group 20 of the first embodiment includes a first lens 21 , a second lens 22 , a third lens 23 , a diaphragm ST, a fourth lens 24 , a fifth lens 25 and a sixth lens 26 from the object side to the image side. The optical camera lens group 20 can further include a filter element 27 , a protective glass 28 and an imaging surface 29 . An image sensing element 200 can be further disposed on the imaging surface 29 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 includes glass, but not limited thereto.

The second lens 22 has a negative refractive power. The object side 22 a is convex, 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 includes plastic, but it is not limited thereto.

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 includes glass, but not limited thereto.

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 spherical. The material of the fourth lens 24 includes glass, but not limited thereto.

The fifth lens 25 has a negative refractive power, the object side 25a is concave, the image side 25b is concave, and both the object side 25a and the image side 25b are spherical. The material of the fifth lens 25 includes glass, but not limited thereto. The image side 24b of the fourth lens 24 and the object side 25b of the fifth lens 25 are cemented together, so that the fourth lens 24 and the fifth lens 25 are combined to form a composite lens.

The sixth lens 26 has a positive refractive power. The object side 26 a is convex, the image side 26 b is convex, and both the object side 26 a and the image side 26 b are aspherical. The material of the sixth lens 26 includes plastic, but not limited thereto.

The filter element 27 is disposed between the sixth lens 26 and the imaging surface 29 to filter out light in a specific wavelength range, such as an infrared filter element. The two surfaces 27a, 27b of the filter element 27 are both flat and made of glass.

The protective glass 28 is disposed between the filter element 27 and the imaging surface 29 to protect the imaging surface 29 . The two surfaces 28a, 28b of the protective glass 28 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. second embodiment EFL= 1.33 mm , Fno = 2.04 , HFOV = 90 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 21a sphere 16.890 1.610 1.834 37.3 -9.89 21b sphere 5.319 3.392 second lens 22a Aspherical 145.390 1.324 1.537 56.0 -3.84 22b Aspherical 2.031 5.678 third lens 23a sphere 6.934 1.329 1.717 29.5 6.99 23b sphere -17.001 1.962 aperture ST unlimited 1.282 fourth lens 24a sphere 4.953 1.595 1.806 40.7 2.54 24b sphere -3.012 glued fifth lens 25a sphere -3.012 0.927 1.923 20.9 -1.86 25b sphere 4.667 0.305 sixth lens 26a Aspherical 3.208 1.928 1.537 56.0 3.83 26b Aspherical -4.560 0.150 filter element 27a flat unlimited 0.300 1.517 64.2 27b flat unlimited 2.000 protective glass 28a flat unlimited 0.500 1.517 64.2 28b flat unlimited 0.050 imaging surface 29 flat unlimited Reference wavelength: 555 nm Table three Aspheric coefficient of the second embodiment surface 22a 22b 26a 26b K 9.00E+01 -7.11E-01 -2.88E+00 -3.87E-01 A ₄ -2.79E-04 -3.35E-04 2.18E-03 2.59E-03 A ₆ -1.90E-07 -2.99E-06 -3.02E-05 9.19E-08 A ₈ -2.53E-09 -1.07E-07 2.23E-07 2.10E-07 A ₁₀ -9.36E-11 -3.28E-08 3.24E-08 7.06E-08 A ₁₂ -1.29E-13 -7.80E-09 4.56E-09 1.46E-08 A ₁₄ -1.38E-13 -1.66E-09 2.09E-09 3.23E-09 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Table four

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 seen from Table 5 that the optical imaging lens group 20 of the second embodiment satisfies the requirements of relational expressions (1) to (10). second embodiment No. Relational value 1 AT3o/ATo4 1.53 2 R3/R4 71.60 3 f45/f123 -4.31 4 R3/R2 27.33 5 AT23/AT12 1.67 6 f45/f6 -8.92 7 (CT1+CT2+CT3)/f123 0.54 8 ∣(1/f1)+(1/f3)∣*EFL 0.06 9 D2/R2 0.91 10 TTL/ImgH 11.27 Table five

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 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the variation of the aberration in the sagittal direction is within + 0.06 mm within the entire field of view; the variation of the aberration in the meridian direction is within + 0.03 mm within the entire field of view. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-θ distortion rate of the optical imaging lens group 10 is less than 6%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470 nm, 555 nm, and 650 nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.02 mm. As shown in FIG. 2B , 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 shows the Astigmatism/Field Curvature, Distortion and Longitudinal Spherical Aberration of the third embodiment of the present invention in order from left to right.

As shown in FIG. 3A , the optical imaging lens group 30 of the first embodiment sequentially includes a first lens 31 , a second lens 32 , a third lens 33 , a diaphragm ST, a fourth lens 34 , a fifth lens 35 and a sixth lens 36 from the object side to the image side. The optical camera lens group 30 can further include a filter element 37 , a protective glass 38 and an imaging surface 39 . An image sensing element 300 can be further disposed on the imaging surface 39 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 includes glass, but not limited thereto.

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 includes plastic, but it is not limited thereto.

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 includes glass, but not limited thereto.

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 spherical. The material of the fourth lens 34 includes glass, but not limited thereto.

The fifth lens 35 has negative refractive power, the object side 35a is concave, the image side 35b is concave, and both the object side 35a and the image side 35b are spherical. The material of the fifth lens 35 includes glass, but not limited thereto. The image side 34b of the fourth lens 34 and the object side 35b of the fifth lens 35 are glued together, so that the fourth lens 34 and the fifth lens 35 are combined to form a composite lens.

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 material of the sixth lens 36 includes plastic, but it is not limited thereto.

The filter element 37 is disposed between the sixth lens 36 and the imaging surface 39 to filter out light in a specific wavelength range, such as an infrared filter element. The two surfaces 37a, 37b of the filter element 37 are both flat and made of glass.

The protective glass 38 is disposed between the filter element 37 and the imaging surface 39 to protect the imaging surface 39 . The two surfaces 38a, 38b of the protective glass 38 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. third embodiment EFL= 1.53 mm , Fno = 2.20 , HFOV = 90 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 31a sphere 18.557 1.155 1.834 37.3 -15.01 31b sphere 7.285 3.738 second lens 32a Aspherical -70.634 3.214 1.537 56.0 -3.72 32b Aspherical 2.093 5.589 third lens 33a sphere 6.875 2.364 1.717 29.5 6.99 33b sphere -16.237 1.995 aperture ST unlimited 0.106 fourth lens 34a sphere 4.977 1.849 1.806 40.7 2.63 34b sphere -3.100 glued fifth lens 35a sphere -3.100 1.481 1.923 20.9 -1.86 35b sphere 4.840 0.378 sixth lens 36a Aspherical 3.639 1.614 1.537 56.0 4.45 36b Aspherical -5.931 0.150 filter element 37a flat unlimited 0.300 1.517 64.2 37b flat unlimited 2.000 protective glass 38a flat unlimited 0.500 1.517 64.2 38b flat unlimited 0.050 imaging surface 39 flat unlimited Reference wavelength: 555 nm Table six Aspheric coefficient of the third embodiment surface 32a 32b 36a 36b K 4.26E+00 -7.17E-01 -4.07E+00 2.25E+00 A ₄ -5.20E-04 -3.76E-04 2.45E-03 2.91E-03 A ₆ 8.04E-07 -1.85E-05 -6.07E-04 -1.44E-04 A ₈ 1.65E-07 -2.26E-05 -9.10E-06 -2.02E-06 A ₁₀ 1.82E-09 -6.60E-07 2.11E-05 -1.47E-06 A ₁₂ 2.63E-11 2.51E-07 6.82E-06 -1.04E-06 A ₁₄ -2.51E-12 3.25E-08 -6.99E-07 1.52E-06 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Table Seven

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 seen from Table 8 that the optical imaging lens group 30 of the third embodiment satisfies the requirements of relational expressions (1) to (10). third embodiment No. Relational value 1 AT3o/ATo4 18.88 2 R3/R4 -33.74 3 f45/f123 -12.46 4 R3/R2 -9.70 5 AT23/AT12 1.50 6 f45/f6 -20.43 7 (CT1+CT2+CT3)/f123 0.92 8 ∣(1/f1)+(1/f3)∣*EFL 0.12 9 D2/R2 0.80 10 TTL/ImgH 12.72 table eight

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 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the variation of the aberration in the sagittal direction is within + 0.03 mm within the entire field of view; the variation of the aberration in the meridian direction is within + 0.06 mm within the entire field of view. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-θ distortion rate of the optical imaging lens group 10 is less than 15%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470 nm, 555 nm, and 650 nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.02 mm. 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. FIG. 4B shows 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 in sequence from left to right.

As shown in FIG. 4A , the optical imaging lens group 40 of the first embodiment includes a first lens 41 , a second lens 42 , a third lens 43 , a diaphragm ST, a fourth lens 44 , a fifth lens 45 and a sixth lens 46 from the object side to the image side. The optical camera lens group 40 can further include a filter element 47 , a protective glass 48 and an imaging surface 49 . An image sensing element 400 can be further disposed on the imaging surface 49 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 includes glass, but not limited thereto.

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 includes plastic, but not limited thereto.

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 includes glass, but not limited thereto.

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 spherical. The material of the fourth lens 44 includes glass, but not limited thereto.

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 spherical. The material of the fifth lens 45 includes glass, but not limited thereto. The image side 44b of the fourth lens 44 and the object side 45b of the fifth lens 45 are cemented together, so that the fourth lens 44 and the fifth lens 45 are combined to form a composite lens.

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 includes plastic, but it is not limited thereto.

The filter element 47 is disposed between the sixth lens 46 and the imaging surface 49 to filter out light in a specific wavelength range, such as an infrared filter element. The two surfaces 47a, 47b of the filter element 47 are both flat and made of glass.

The protective glass 48 is disposed between the filter element 47 and the imaging surface 49 to protect the imaging surface 49 . The two surfaces 48a, 48b of the protective glass 48 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. Fourth embodiment EFL= 1.47 mm , Fno = 2.23 , HFOV = 90 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 41a sphere 19.966 2.097 1.834 37.3 -12.06 41b sphere 6.388 4.389 second lens 42a Aspherical -111.138 3.404 1.537 56.0 -4.06 42b Aspherical 2.253 5.568 third lens 43a sphere 6.885 3.188 1.717 29.5 7.11 43b sphere -16.260 2.112 aperture ST unlimited -0.099 fourth lens 44a sphere 4.913 1.860 1.806 40.7 2.62 44b sphere -3.098 glued fifth lens 45a sphere -3.098 1.494 1.923 20.9 -1.85 45b sphere 4.771 0.350 sixth lens 46a Aspherical 3.751 1.641 1.537 56.0 4.63 46b Aspherical -6.317 0.150 filter element 47a flat unlimited 0.300 1.517 64.2 47b flat unlimited 2.000 protective glass 48a flat unlimited 0.500 1.517 64.2 48b flat unlimited 0.050 imaging surface 49 flat unlimited Reference wavelength: 555 nm Table nine The aspheric coefficient of the fourth embodiment surface 42a 42b 46a 46b K 9.00E+01 -6.96E-01 -4.49E+00 4.35E+00 A ₄ -5.21E-04 -1.42E-04 2.36E-03 1.68E-03 A ₆ 9.12E-11 -5.57E-06 -6.92E-04 -1.37E-04 A ₈ 1.84E-07 -1.79E-05 -1.65E-05 2.91E-05 A ₁₀ 1.39E-09 4.53E-07 1.43E-05 5.92E-07 A ₁₂ 1.64E-11 2.47E-07 3.05E-06 -2.27E-06 A ₁₄ -2.19E-12 5.13E-09 -5.93E-07 7.62E-07 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 table ten

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 (10). Fourth embodiment No. Relational value 1 AT3o/ATo4 -21.36 2 R3/R4 -49.32 3 f45/f123 -15.63 4 R3/R2 -17.40 5 AT23/AT12 1.27 6 f45/f6 -22.21 7 (CT1+CT2+CT3)/f123 1.32 8 ∣(1/f1)+(1/f3)∣*EFL 0.08 9 D2/R2 0.90 10 TTL/ImgH 13.89 Table Eleven

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 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the variation of the aberration in the sagittal direction is within + 0.03 mm within the entire field of view; the variation of the aberration in the meridian direction is within + 0.06 mm within the entire field of view. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-θ distortion rate of the optical imaging lens group 10 is less than 6%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470 nm, 555 nm, and 650 nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within + 0.01 mm. 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 aberration diagram (Astigmatism/Field Curvature), distortion aberration diagram (Distortion) and longitudinal spherical aberration diagram (Longitudinal Spherical Aberration) of the fifth embodiment of the present invention.

As shown in FIG. 5A , the optical imaging lens group 50 of the first embodiment includes a first lens 51 , a second lens 52 , a third lens 53 , an aperture ST, a fourth lens 54 , a fifth lens 55 and a sixth lens 56 from the object side to the image side. The optical camera lens group 50 can further include a filter element 57 , a protective glass 58 and an imaging surface 59 . An image sensing element 500 can be further disposed on the imaging surface 59 to form an imaging device (not otherwise labeled).

The first lens 51 has a 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 spherical. The material of the first lens 51 includes glass, but not limited thereto.

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 includes plastic, but not limited thereto.

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 includes glass, but not limited thereto.

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 spherical. The material of the fourth lens 54 includes glass, but not limited thereto.

The fifth lens 55 has a negative refractive power, the object side 55a is concave, the image side 55b is concave, and both the object side 55a and the image side 55b are spherical. The material of the fifth lens 55 includes glass, but not limited thereto. The image side 54b of the fourth lens 54 is not glued to the object side 55b of the fifth lens 55, so that the fourth lens 54 and the fifth lens 55 can be assembled separately.

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 includes plastic, but not limited thereto.

The filter element 57 is disposed between the sixth lens 56 and the imaging surface 59 to filter out light in a specific wavelength range, such as an infrared filter element. The two surfaces 57a, 57b of the filter element 57 are both flat and made of glass.

The protective glass 58 is disposed between the filter element 57 and the imaging surface 59 to protect the imaging surface 59 . The two surfaces 58a, 58b of the protective glass 58 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. fifth embodiment EFL= 1.76 mm , Fno = 2.52 , HFOV = 85 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 51a sphere 23.763 1.501 1.834 37.3 -17.42 51b sphere 8.784 3.646 second lens 52a Aspherical -51.884 3.878 1.537 56.0 -4.00 52b Aspherical 2.306 5.424 third lens 53a sphere 7.225 4.753 1.717 29.5 7.62 53b sphere -16.676 0.100 aperture ST unlimited 0.800 fourth lens 54a sphere 4.965 1.833 1.806 40.7 2.83 54b sphere -3.557 0.085 fifth lens 55a sphere -3.236 1.620 1.923 20.9 -1.89 55b sphere 4.811 0.149 sixth lens 56a Aspherical 3.776 2.107 1.537 56.0 4.69 56b Aspherical -6.134 0.257 filter element 57a flat unlimited 0.300 1.517 64.2 57b flat unlimited 2.000 protective glass 58a flat unlimited 0.500 1.517 64.2 58b flat unlimited 0.050 imaging surface 59 flat unlimited Reference wavelength: 555 nm Table 12 Aspherical coefficient of the fifth embodiment surface 52a 52b 56a 56b K -2.87E+01 -6.91E-01 -4.20E+00 4.44E+00 A ₄ -4.14E-04 1.82E-03 2.18E-03 8.97E-04 A ₆ 2.65E-06 1.40E-04 -2.75E-04 1.74E-04 A ₈ 1.47E-07 -1.54E-05 9.76E-05 9.21E-05 A ₁₀ -6.14E-10 1.62E-06 3.90E-05 1.13E-05 A ₁₂ -3.29E-11 2.56E-07 7.43E-06 -3.46E-07 A ₁₄ -6.46E-14 1.42E-08 -3.69E-06 5.19E-07 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 Table 13

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 seen from Table 14 that the optical imaging lens group 50 of the fifth embodiment satisfies the requirements of relational expressions (1) to (10). fifth embodiment No. Relational value 1 AT3o/ATo4 0.12 2 R3/R4 -22.50 3 f45/f123 -7.90 4 R3/R2 -5.91 5 AT23/AT12 1.49 6 f45/f6 -14.96 7 (CT1+CT2+CT3)/f123 5.77 8 ∣(1/f1)+(1/f3)∣*EFL 0.13 9 D2/R2 0.71 10 TTL/ImgH 13.89 Table Fourteen

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 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the variation of the aberration in the sagittal direction is within +0.06 mm within the entire field of view; the variation of the aberration in the meridian direction is within +0.03 mm within the entire field of view. From the F-θ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-θ distortion rate of the optical imaging lens group 10 is less than 20%. It can be seen from the longitudinal spherical aberration diagram that the off-axis rays of the three visible light wavelengths of 470 nm, 555 nm, and 650 nm at different heights can be concentrated near the imaging point, and the deviation of the imaging point can be controlled within +0.05 mm. 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. 6, an imaging device 1010 includes the optical imaging lens group 10, 20, 30, 40, 50 as described in the first to fifth embodiments, and an image sensor element 100, 200, 300, 400, 500; , 300, 400, 500. The image sensing elements 100 , 200 , 300 , 400 , and 500 are, for example, Charge-Coupled Devices (CCD) or Complementary Metal Oxide Semiconductor (CMOS) image sensing elements.

In FIG. 6 , a vehicle electronic device 1000 according to the sixth embodiment of the present invention includes an imaging device 1010 , wherein the vehicle electronic device 1000 is used to observe, monitor, sense and/or record the environment and status outside the vehicle. Seventh embodiment

Referring to Fig. 7, an imaging device 2010 includes the optical imaging lens group 10, 20, 30, 40, 50 as described in the first to fifth embodiments, and an image sensing element 100, 200, 300, 400, 500; , 300, 400, 500. The image sensing elements 100 , 200 , 300 , 400 , and 500 are, for example, Charge-Coupled Devices (CCD) or Complementary Metal Oxide Semiconductor (CMOS) image sensing elements.

In FIG. 7 , a general electronic device 2000 according to the seventh embodiment of the present invention includes an imaging device 2010 , wherein the general electronic device 2000 can be applied to general 3C products and other electronic products with camera functions.

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 application, and any changes made within the scope of the patent application or its equivalent scope should still fall within the scope of the patent application of the present invention.

10, 20, 30, 40, 50: optical camera lens group 11, 21, 31, 41, 51: first lens 12, 22, 32, 42, 52: second lens 13, 23, 33, 43, 53: third lens 14, 24, 34, 44, 54: fourth lens 15, 25, 35, 45, 55: fifth lens 16, 26, 36, 46, 56: sixth lens 17, 27, 37, 47, 57: filter elements 18, 28, 38, 48, 58: protective glass 19, 29, 39, 49, 59: imaging surface 11a, 21a, 31a, 41a, 51a: the object side of the first lens 11b, 21b, 31b, 41b, 51b: image side of the first lens 12a, 22a, 32a, 42a, 52a: the object side of the second lens 12b, 22b, 32b, 42b, 52b: the image side of the second lens 13a, 23a, 33a, 43a, 53a: the object side of the third lens 13b, 23b, 33b, 43b, 53b: the image side of the third lens 14a, 24a, 34a, 44a, 54a: the object side of the fourth lens 14b, 24b, 34b, 44b, 54b: the image side of the fourth lens 15a, 25a, 35a, 45a, 55a: the object side of the fifth lens 15b, 25b, 35b, 45b, 55b: image side of the fifth lens 16a, 26a, 36a, 46a, 56a: the object side of the sixth lens 16b, 26b, 36b, 46b, 56b: the image side of the sixth lens 17a, 17b, 27a, 27b, 37a, 37b, 47a, 47b, 57a, 57b: two surfaces of the filter element 18a, 18b, 28a, 28b, 38a, 38b, 48a, 48b, 58a, 58b: two surfaces of protective glass 100, 200, 300, 400, 500: image sensor 1000, 2000: electronic devices 1010, 2010: 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 are 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 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 is 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 is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the fifth embodiment of the present invention; [Fig. 6] is a schematic diagram of a vehicle electronic device according to the sixth embodiment of the present invention; [FIG. 7] is a schematic diagram of a general electronic device according to a seventh embodiment 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: Protective glass

19: 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

18a, 18b: the second surface of the protective glass

100: image sensing element

I: optical axis

ST: Aperture

Claims (13)

An optical imaging lens group, comprising in order from the object side to the image side: a first lens with negative refractive power, and its object side is convex; a second lens with refractive power, its image side is concave; a third lens with refractive power, its object side is convex; an aperture; a fourth lens with positive refractive power; a fifth lens with negative refractive power, and its image side is concave; and a sixth lens with refractive power; The distance from the image side of the third lens along the optical axis to the aperture is AT3o, the distance from the aperture to the object side of the fourth lens along the optical axis is ATo4, the combined focal length from the fourth lens to the fifth lens is f45, and the combined focal length from the first lens to the third lens is f123, which satisfies the following relationship: |AT3o/ATo4|

25.00; -20.00

f45/f123

-5.00. For example, the optical imaging lens group of item 1 of the scope of the patent application, wherein the radius of curvature of the object side of the second lens is R3, and the radius of curvature of the image side of the second lens is R4, which satisfy the following relationship: |R3/R4|

75.00. An optical imaging lens group comprising: a first lens with negative refractive power; a second lens with negative refractive power; a third lens with refractive power, and its image side is convex; a fourth lens with positive refractive power; a fifth lens with refractive power; and a sixth lens with positive refractive power; wherein, the total number of lenses in the optical imaging lens group is six; , the combined focal length from the fourth lens to the fifth lens is f45, and the combined focal length from the first lens to the third lens is f123, which satisfy the following relationship: |R3/R2|

30.00; -20.00

f45/f123

-5.00. Such as the optical imaging lens group of item 3 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 along the optical axis is AT12, and the distance from the image side of the second lens to the object side of the third lens along the optical axis is AT23, which satisfies the following relationship: 1.00

AT23/AT12

2.00. For example, the optical imaging lens group of claim 3, wherein the combined focal length of the fourth lens to the fifth lens is f45, and the focal length of the sixth lens is f6, which satisfy the following relationship: -30.0

f45/f6

-8.00. Such as the optical imaging lens group of item 1 or item 3 of the patent scope, wherein the thickness of the first lens on the optical axis is CT1, the thickness of the second lens on the optical axis is CT2, the thickness of the third lens on the optical axis is CT3, and the combined focal length from the first lens to the third lens is f123, which satisfies the following relationship: 0.50

(CT1+CT2+CT3)/f123

6.00. For example, the optical imaging lens group of item 1 or item 3 of the patent scope, wherein the focal length of the first lens is f1, the focal length of the third lens is f3, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: |(1/f1)+(1/f3)|*EFL

0.15. Such as the optical imaging lens group of item 1 or item 3 of the patent scope, wherein, the radius of the first lens image side perpendicular to the optical axis is D2, and the curvature radius of the first lens image side is R2, which satisfies the following relationship: 0.70

D2/R2

1.00. For the optical imaging lens group of item 1 or item 3 of the patent scope, wherein, the maximum image height of the optical imaging lens group is ImgH, and the total length of the optical imaging lens group is TTL, which satisfies the following relationship: 11.00

TTL/ImgH

15.00. As for the optical imaging lens group of item 1 or item 3 of the patent application, wherein, the object side of the second lens is concave at the paraxial position. As the optical imaging lens group of item 1 or item 3 of the scope of the patent application, wherein the fourth lens and the fifth lens are combined to form a composite lens. An imaging device comprising the optical imaging lens group as claimed in item 1 or item 3 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 as claimed in claim 12 of the patent application.