TWM636239U - 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 positive refractive power and includes an object-side surface being convex; the second lens has refractive power and includes an image-side surface being convex; the third lens has refractive power; the fourth lens has positive refractive power; the fifth lens has refractive power and includes an image-side surface being concave. When specific conditions are satisfied, the optical imaging lens can have a compact size and good imaging qualities.

Description

Optical imaging lens group, imaging device and electronic device

The invention relates to an optical imaging device, especially an optical imaging lens group that can be used in ordinary 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 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, driving consumer electronics to carry miniaturized cameras (Miniaturized Camera) ) The development trend of increasing the added value of products. 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 view of the increasing requirements of consumers for imaging quality of imaging devices, especially clear imaging quality, how to provide an optical imaging device with good imaging quality and miniaturization to meet the needs of various photo-taking occasions has become an issue. Problems that people in the technical field are eager to solve.

Therefore, in order to solve the above problems, the invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side. Among them, the first lens has positive refractive power, and its object side is convex; the second lens has refractive power, and its image side is convex; the third lens has refractive power; the fourth lens has positive refractive power; the fifth lens has refractive power , whose image side is concave. The total number of lenses in the optical imaging lens group is five pieces; the combined focal length of the third lens to the fifth lens is f345, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0 < f345/ EFL < 20.0.

According to the embodiment of the invention, the radius of curvature of the object side of the third lens is R31, and the optical effective radius of the object side of the third lens perpendicular to the optical axis is D31, which satisfies the following relationship: 0<∣R31/D31∣< 30.0.

According to an embodiment of the invention, the distance between the object side of the second lens and the image side of the three lenses on the optical axis is TT23, the object side of the third lens has an intersection point with the optical axis, and the object side of the third lens has a The critical point, a projected distance from the intersection point to the critical point on the optical axis is S31, which satisfies the following relationship: -2.0<TT23/S31<-10.0.

This invention also provides an optical imaging lens group, the radius of curvature of the object side of the second lens is R21, and the combined focal length of the first lens to the second lens is f12, which satisfies the following relationship: 0 <∣R21/f12 ∣ < 20.0.

According to the embodiment of the present creation, the maximum image height ImgH of the optical imaging lens group, the total length of the optical imaging lens group is TTL, which satisfies the following relationship: 1.0<TTL/ImgH<2.0.

Another embodiment of the present invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side. Among them, the first lens has positive refractive power, and its object side is convex; the second lens has positive refractive power, and its image side is convex; the third lens has refractive power; the fourth lens has positive refractive power; force. The total number of lenses in the optical imaging lens group is five pieces; the optical effective radius of the object side of the second lens perpendicular to the optical axis is D21, the object side of the second lens has an intersection with the optical axis, and the object side of the second lens There is a critical point, and a projection distance from the intersection point to the critical point on the optical axis is S21, which satisfies the following relationship: D21/S21<-5.0.

According to the embodiment of the invention, the radius of curvature of the image side of the second lens is R22, 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: R22/AT23< 0.

According to the embodiment of the 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 second lens is f12, which satisfy the following relationship: 0 < f45/f12 < 8.0 .

According to the embodiment of this creation, the maximum image height ImgH of the optical imaging lens group, the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, which satisfies the following relationship: 1.0＜ImgH/ TT23 < 5.0.

According to the embodiment of the invention, the optical effective radius of the second lens image side perpendicular to the optical axis is D22, the second lens image side has an intersection point with the optical axis, and the second lens image side has a critical point, the The projection distance from the intersection point to the critical point on the optical axis is S22, and the radius of curvature of the image side of the second lens is R22, which satisfies the following relationship: -90.0 < (D22/S22)*(R22/S22) <- 5.0.

Still another embodiment of the present invention provides an optical imaging lens group, which sequentially includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens from the object side to the image side. Among them, the first lens has positive refractive power, and its object side is convex; the second lens has refractive power; the third lens has negative refractive power; the fourth lens has positive refractive power; the fifth lens has refractive power, and its image side is concave. The total number of lenses in the optical imaging lens group is five pieces; the combined focal length of the second lens to the third lens is f23, and the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, which is Satisfy the following relationship: 0 <∣ f23/TT23∣ < 70.0.

According to the embodiment of the present creation, the radius of curvature of the image side of the third lens is R32, and the optical effective radius of the third lens image side perpendicular to the optical axis is D32, which satisfies the following relationship: 0<∣R32/D32∣< 35.0.

According to the embodiment of the invention, the combined focal length from the first lens to the third lens is f123, and the combined focal length from the second lens to the fourth lens is f234, which satisfy the following relationship: 1.0<f123/f234<5 .

According to an embodiment of the invention, the optical effective radius of the third lens image side perpendicular to the optical axis is D32, the third lens image side has an intersection point with the optical axis, and the third lens image side has a critical point, the third lens image side has a critical point, the A projected distance from the intersection point to the critical point on the optical axis is S32, which satisfies the following relationship: |D32/S32| < 750.0.

According to the embodiment of the invention, the optical effective radius of the second lens image side perpendicular to the optical axis is D22, the optical effective radius of the third lens object side perpendicular to the optical axis is D31, and the second lens image side is along the optical axis. The distance to the object side of the third lens is AT23, which satisfies the following relationship: 10.0<(D22/AT23)+(D31/TT23)<40.0.

The 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 disposed on the imaging surface of the optical imaging lens group.

The 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, 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 extending the optical life. The service life of the imaging lens group. When the lens material is plastic, it is beneficial to reduce the weight of the optical imaging lens group and reduce the production cost.

In the embodiment of the invention, each lens includes an object side facing the subject and an image side facing the imaging surface. The surface shape of each lens is defined according to the shape of the surface near the optical axis (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 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 curvature radius of the surface is positive or negative. For example, if the curvature radius of the object side of a lens is positive, then the object side is convex; 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 embodiments of the present invention, the object and image sides of each lens may be spherical or aspheric surfaces. Using an aspheric surface on the lens helps to correct the imaging aberrations of the optical imaging lens group such as spherical aberration, and reduces the number of optical lens elements used. Although in the embodiment of the present invention, some optical lenses use aspherical surfaces, they can still be designed as spherical surfaces as required.

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 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 set on the imaging surface, the maximum image height ImgH represents the diagonal length of the effective sensing area of the image sensing element one half. 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).

This creation provides an optical imaging lens group, which includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence from the object side to the image side; wherein, the total number of lenses in the optical imaging lens group For five slices.

The first lens has a positive refractive power, its object side is convex, and its image side is concave, so as to meet the requirements of practical applications, thereby helping to shorten the total length of the optical system. Preferably, the material of the first lens is plastic, so as to reduce manufacturing cost and facilitate processing. In an embodiment of the present invention, the object side or/and image side of the first lens can be aspherical, so as to improve spherical aberration and off-axis aberration.

The second lens has positive refractive power and is used for converging light. The image side of the second lens is convex, and the object side can be convex or concave, thereby effectively sharing the refractive power of the first lens and reducing sensitivity. 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 image side of the second lens can be aspherical, so as to improve spherical aberration and off-axis aberration.

The third lens has negative refractive power, its object side can be convex or concave, and its image side can be convex or concave. Utilizing the negative refractive power of the third lens helps to adjust the light path and correct chromatic aberration. In this inventive embodiment, the material of the third lens is plastic, so as to reduce manufacturing cost and facilitate processing. In an embodiment of the present invention, the object side or/and the image side of the third lens are aspherical, so as to improve spherical aberration and off-axis aberration.

The fourth lens has positive refractive power, its object side is concave, and its image side is convex. Utilizing the positive refractive power of the fourth lens helps to gather light and correct astigmatic aberration. In this inventive embodiment, the material of the fourth lens is plastic to reduce manufacturing cost and facilitate processing. In an embodiment of the present invention, the object side or/and the image side of the fourth lens are aspherical, so as to improve the spherical aberration and the off-axis aberration caused by the large viewing angle.

The fifth lens has negative refractive power, its object side is convex, and its image side is concave. Utilizing the negative refractive power of the fifth lens helps to adjust the light path. Preferably, the material of the fifth lens is plastic, so as to reduce manufacturing cost and facilitate processing. In an embodiment of the present invention, the object side or/and image side of the fifth lens is aspherical, so as to correct distortion and off-axis aberration and help adjust the angle of the chief ray incident on the imaging surface, thereby improving the relative illuminance of the image.

The combined focal length of the third lens to the fifth lens is f345, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0<f345/EFL<20.0 (1).

When the relationship (1) is satisfied, better imaging quality can be provided while maintaining the miniaturization requirements of the system, and the design flexibility of the optical imaging lens group can be improved.

The radius of curvature of the object side of the third lens is R31, and the optical effective radius of the object side of the third lens perpendicular to the optical axis is D31, which satisfies the following relationship: 0 <∣R31/D31∣<30.0 (2).

The distance between the object side of the second lens and the image side of the three lenses on the optical axis is TT23. The object side of the third lens has an intersection with the optical axis, and the object side of the third lens has a critical point. A projection distance of the critical point on the optical axis is S31, which satisfies the following relationship: -2.0 < TT23/S31 < -10.0 (3).

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

The radius of curvature of the object side of the second lens is R21, and the combined focal length from the first lens to the second lens is f12, which satisfies the following relationship: 0 <∣R21/f12∣ < 20.0 (4).

When the relational expression (4) is satisfied, the imaging quality of the optical imaging lens group can be effectively improved, and the design flexibility of the optical imaging lens group can be enhanced.

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: 1.0<TTL/ImgH<2.0 (5).

When the relationship (5) is satisfied, the miniaturization of the optical system can be effectively maintained.

The optical effective radius of the object side of the second lens perpendicular to the optical axis is D21, the object side of the second lens has an intersection with the optical axis, and the object side of the second lens has a critical point. A projected distance on the axis is S21, which satisfies the following relationship: D21/S21 < -5.0 (6).

When relational expression (6) is satisfied, it is helpful to improve the imaging quality of the optical imaging lens group.

The radius of curvature of the image side of the second lens is R22, 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: R22/AT23 < 0 (7).

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 second lens is f12, which satisfy the following relationship: 0 < f45/f12 < 8.0 (8).

When the relationship (7) and (8) are satisfied, the astigmatic aberration of the optical imaging lens group can be effectively improved, and the focal length range of the lens of the optical imaging lens group can be flexibly changed, so as to improve the optical imaging lens group Design flexibility.

The maximum image height of the optical imaging lens group is ImgH, and the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, which satisfies the following relationship: 1.0<ImgH/TT23<5.0 (9).

The optical effective radius of the second lens image side perpendicular to the optical axis is D22, the second lens image side has an intersection point with the optical axis, and the second lens image side has a critical point, and the intersection point to the critical point is on the optical axis. A projection distance on the axis is S22, and the radius of curvature of the image side of the second lens is R22, which satisfies the following relationship: -90.0 < (D22/S22)*(R22/S22) < -5.0 (10).

When the relational expressions (9) to (10) are satisfied, the optical imaging lens group can provide better imaging quality while maintaining the miniaturization requirement of the system.

The combined focal length from the second lens to the third lens is f23, and the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, which satisfies the following relationship: 0 <∣ f23/TT23∣ < 70.0 (11).

When the relationship (11) is satisfied, the chromatic aberration 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 curvature of the image side of the third lens is R32, and the optical effective radius of the image side of the third lens perpendicular to the optical axis is D32, which satisfies the following relationship: 0 < |R32/D32| < 35.0 (12).

The combined focal length from the first lens to the third lens is f123, and the combined focal length from the second lens to the fourth lens is f234, which satisfy the following relationship: 1.0 < f123/f234 < 5 (13).

When the relationship (12) and (13) are satisfied, the imaging quality of the optical imaging lens group can be effectively improved, and the focal length range of the lens of the optical imaging lens group can be flexibly changed, so as to improve the design flexibility of the optical imaging lens group Spend.

The optical effective radius of the third lens image side perpendicular to the optical axis is D32, the third lens image side has an intersection point with the optical axis, and the third lens image side has a critical point, the intersection point to the critical point on the light A projection distance on the axis is S32, which satisfies the following relationship: ∣D32/S32∣ < 750.0 (14).

The optical effective radius of the second lens image side perpendicular to the optical axis is D22, the optical effective radius of the third lens object side perpendicular to the optical axis is D31, and the second lens image surface is along the optical axis to the third lens object side The distance between them is AT23, which satisfies the following relationship: 10.0 ＜ (D22/AT23)+(D31/TT23) ＜ 40.0 (15).

When the relational expressions (14) to (15) are satisfied, the optical imaging lens group can provide better imaging quality and help to correct the astigmatic aberration of the optical imaging lens group. first embodiment

Referring to FIG. 1A and FIG. 1B , FIG. 1A is a schematic diagram of the optical imaging lens group of the first embodiment of the present invention. Fig. 1B shows the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the first embodiment of the invention in order from left to right.

As shown in FIG. 1A, the optical imaging lens group 10 of the first embodiment includes a first lens 11, a diaphragm ST, a second lens 12, a third lens 13, a fourth lens 14, and a first lens 11 from the object side to the image side. Five lenses15. The optical imaging lens set 10 can further include a filter cover assembly 16 and an imaging surface 17 , wherein the filter cover assembly 16 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 100 can be further disposed on the imaging surface 17 to form an imaging device (not otherwise labeled).

The first lens 11 has positive 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 aspherical. The material of the first lens 11 includes plastic, but not limited thereto.

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

The third lens 13 has negative refractive power, the object side 13 a is concave, the image side 13 b is concave, and both the object side 13 a and the image side 13 b are aspherical. The material of the third lens 13 includes plastic, but it is not limited thereto.

The fourth lens 14 has positive refractive power, the object side 14a is concave, 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 includes plastic, but it is not limited thereto.

The fifth lens 15 has negative refractive power, the object side 15a is convex, the image side 15b is concave, and both the object side 15a and the image side 15b are aspherical. The material of the fifth lens 15 includes plastic, but it is not limited thereto.

The filter cover assembly 16 is disposed between the fifth lens 15 and the imaging surface 17 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 16a, 16b of the filter element 16 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).

其中，X：非球面上距離光軸為Y的點與非球面於光軸上之切面間的距離； Y：非球面上的點與光軸間之垂直距離； C：透鏡於近光軸處的曲率半徑之倒數； K：錐面係數；以及 Ai：第i階非球面係數，其中i = 2x，且x 為大於且等於2之自然數，即i為大於且等於4的偶數。 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 curvature radius of ; 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 of 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 0.253 mm, which means that the thickness of the first lens 11 is 0.253 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 0.026 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 value are also listed in Table 1. first embodiment EFL= 1.60 mm , Fno = 1.81 , HFOV = 44.2 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 11a Aspherical 1.140 0.253 1.5445 55.987 3.24 11b Aspherical 2.962 0.026 aperture ST unlimited 0.095 second lens 12a Aspherical 10.082 0.313 1.5445 55.987 1.34 12b Aspherical -0.782 0.025 third lens 13a Aspherical -4.036 0.160 1.6613 20.373 -1.64 13b Aspherical 1.524 0.157 fourth lens 14a Aspherical -1.111 0.486 1.6397 23.503 0.69 14b Aspherical -0.374 0.020 fifth lens 15a Aspherical 1.095 0.192 1.6397 23.503 -0.71 15b Aspherical 0.301 0.300 Filter cover assembly 16a flat unlimited 0.145 1.5168 64.167 16b flat unlimited 0.258 imaging surface 17 flat unlimited 0.000 Reference wavelength: 555 nm Table I

Please refer to Table 2 below, which is the aspheric coefficient 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 12 a of the second lens 12 is 46.5. 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 11a 11b 12a 12b 13a 13b 14a 14b 15a 15b K 7.72E-01 -4.79E-01 4.65E+01 3.54E-01 4.93E+01 -2.36E+01 -3.11E+00 -3.31E+00 -9.00E+01 -6.01E+00 A ₄ -3.03E-01 -7.87E-01 -3.49E-01 3.75E-01 -1.53E+00 -7.46E-01 1.46E-01 -5.02E-01 -5.52E-01 -7.34E-01 A ₆ -3.80E-01 2.54E+00 -1.01E+01 -6.13E+00 3.74E+00 3.22E+00 6.89E-01 -9.84E-01 -9.12E-01 1.14E+00 A ₈ -1.07E+01 -3.69E+01 8.64E+01 5.36E+01 -3.33E+00 -1.46E+01 -1.09E+01 8.86E+00 5.75E+00 -1.20E+00 A ₁₀ 6.37E+01 9.17E+01 -5.96E+02 -2.46E+02 3.91E+00 6.02E+01 1.25E+02 -2.39E+01 -1.02E+01 6.98E-01 A ₁₂ -2.56E+02 1.93E+02 1.98E+03 4.48E+02 -1.48E+02 -1.38E+02 -4.63E+02 6.59E+01 7.98E+00 -1.32E-01 A ₁₄ 3.64E+02 -7.35E+02 -1.95E+03 0.00E+00 4.64E+02 1.20E+02 7.26E+02 -1.01E+02 -2.72E+00 -8.77E-02 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 -4.26E+02 5.41E+01 3.21E-01 3.91E-02 Table II

In the first embodiment, the combined focal length of the third lens to the fifth lens is f345, the effective focal length of the optical imaging lens group is EFL, f345/EFL=-1.48.

In the first embodiment, the radius of curvature of the third lens object side is R31, the optical effective radius of the third lens object side perpendicular to the optical axis is D31, |R31/D31|=8.33.

In the first embodiment, the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, the object side of the third lens has an intersection point with the optical axis, and the object side of the third lens has a Critical point, a projected distance from the intersection point to the critical point on the optical axis is S31, TT23/S31 = -5.67.

In the first embodiment, the radius of curvature of the object side of the second lens is R21, the combined focal length of the first lens and the second lens is f12, |R21/f12|=9.32.

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=1.53.

In the first embodiment, the optical effective radius of the object side of the second lens perpendicular to the optical axis is D21, the object side of the second lens has an intersection point with the optical axis, and the object side of the second lens has a critical point, and the object side of the second lens has a critical point. A projected distance from the intersection point to the critical point on the optical axis is S21, D21/S21 = -25.73.

In the first embodiment, the radius of curvature of the image side of the second lens is R22, the distance from the image side of the second lens to the object side of the third lens along the optical axis is AT23, R22/AT23 = -31.28.

In the first embodiment, the combined focal length from the fourth lens to the fifth lens is f45, the combined focal length from the first lens to the second lens is f12, and f45/f12=4.79.

In the first embodiment, the maximum image height of the optical imaging lens group is ImgH, and the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, and ImgH/TT23=3.19.

In the first embodiment, the optical effective radius of the second lens image side perpendicular to the optical axis is D22, the second lens image side has an intersection point with the optical axis, and the second lens image side has a critical point, the A projection distance from the intersection point to the critical point on the optical axis is S22, and the radius of curvature of the image side of the second lens is R22, (D22/S22)*(R22/S22)=-16.34.

In the first embodiment, the combined focal length from the second lens to the third lens is f23, the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, ∣ f23/TT23∣ = 10.88 .

In the first embodiment, the radius of curvature of the image side of the third lens is R32, the optical effective radius of the image side of the third lens perpendicular to the optical axis is D32, |R32/D32|=2.48.

In the first embodiment, the combined focal length from the first lens to the third lens is f123, the combined focal length from the second lens to the fourth lens is f234, and f123/f234=2.83.

In the first embodiment, the optical effective radius of the third lens image side perpendicular to the optical axis is D32, the third lens image side has an intersection point with the optical axis, and the third lens image side has a critical point, the A projected distance from the intersection point to the critical point on the optical axis is S32, |D32/S32|= 14.96.

In the first embodiment, the optical effective radius of the second lens image side perpendicular to the optical axis is D22, the optical effective radius of the object side of the third lens perpendicular to the optical axis is D31, and the image surface of the second lens is along the optical axis. The distance to the object side of the third lens is AT23, (D22/AT23)+(D31/TT23)=18.97.

It can be seen from the numerical values of the above relational expressions that the optical imaging lens group 10 of the first embodiment satisfies the requirements of the relational expressions (1) to (15).

Referring to FIG. 1B , from left to right in the figure are the astigmatism field curve diagram, F-tanθ 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 aberration in the sagittal direction changes within + 0.09 mm within the entire field of view; the aberration in the meridian direction changes in the entire field of view The amount is within + 0.06 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 10 is less than 2%. 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 + 0.03 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 the optical imaging lens group of the second embodiment of the present invention. Fig. 2B shows the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the second embodiment of the invention in order from left to right.

As shown in FIG. 2A , the optical imaging lens group 20 of the first embodiment includes a first lens 21, a diaphragm ST, a second lens 22, a third lens 23, a fourth lens 24, and a first lens 21 from the object side to the image side. Five lenses25. The optical imaging lens set 20 can further include a filter cover assembly 26 and an imaging surface 27 , wherein the filter cover assembly 26 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 200 can be further disposed on the imaging surface 27 to form an imaging device (not labeled otherwise).

The first lens 21 has positive 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 aspherical. The material of the first lens 21 includes plastic, but it is not limited thereto.

The second lens 22 has a positive refractive power, the object side 22a is convex, the image side 22b is convex, and both the object side 22a and the image side 22b are aspherical. The material of the second lens 22 includes plastic, but it is not limited thereto.

The third lens 23 has a negative refractive power, the object side 23a is convex, the image side 23b is concave, and both the object side 23a and the image side 23b are aspherical. The material of the third lens 23 includes plastic, but it is not limited thereto.

The fourth lens 24 has positive refractive power, the object side 24a is concave, 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 includes plastic, but it is not limited thereto.

The fifth lens 25 has a negative refractive power. The object side 25 a is convex, the image side 25 b is concave, and both the object side 25 a and the image side 25 b are aspherical. The material of the fifth lens 25 includes plastic, but it is not limited thereto.

The filter cover assembly 26 is disposed between the fifth lens 25 and the imaging surface 27 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 26a, 26b of the filter element 26 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= 1.60 mm , Fno = 1.87, HFOV = 44.2 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 21a Aspherical 1.175 0.253 1.5445 55.987 4.86 21b Aspherical 1.947 0.040 aperture ST unlimited 0.081 second lens 22a Aspherical 4.292 0.251 1.5445 55.987 1.99 22b Aspherical -1.424 0.038 third lens 23a Aspherical 4.203 0.160 1.6613 20.373 -4.11 23b Aspherical 1.634 0.197 fourth lens 24a Aspherical -0.956 0.515 1.5677 37.317 0.72 24b Aspherical -0.342 0.030 fifth lens 25a Aspherical 1.403 0.223 1.6397 23.503 -0.75 25b Aspherical 0.336 0.300 Filter cover assembly 26a flat unlimited 0.145 1.5168 64.167 26b flat unlimited 0.260 imaging surface 27 flat unlimited 0.000 Reference wavelength: 555 nm Table three Aspheric coefficient of the second embodiment surface 21a 21b 22a 22b 23a 23b 24a 24b 25a 25b K 7.72E-01 -4.79E-01 4.65E+01 3.54E-01 4.93E+01 -2.36E+01 -3.11E+00 -3.31E+00 -9.00E+01 -6.01E+00 A ₄ -3.42E-01 -2.26E-01 4.59E-01 7.96E-01 -4.86E-01 1.87E-01 -4.43E-01 -1.26E+00 2.02E-01 -2.00E-01 A ₆ 5.21E-02 -5.27E+00 -7.04E+00 -1.40E+01 -9.09E+00 -3.90E+00 4.25E+00 3.32E+00 -1.42E+00 -5.60E-03 A ₈ -7.40E+00 4.14E+01 -4.53E-01 8.86E+01 1.84E+01 2.94E+00 -2.39E+01 -4.24E+00 2.61E+00 -4.35E-03 A ₁₀ -6.03E+00 -4.24E+02 2.47E+02 -4.20E+02 -7.03E+00 3.57E+01 1.32E+02 -1.27E+01 -4.76E+00 1.36E-01 A ₁₂ 7.61E+01 1.79E+03 -2.17E+03 7.89E+02 -1.48E+02 -1.38E+02 -4.63E+02 6.59E+01 7.98E+00 -1.32E-01 A ₁₄ -1.47E+02 -2.57E+03 5.26E+03 0.00E+00 4.94E+02 1.54E+02 8.18E+02 -8.80E+01 -7.53E+00 3.20E-02 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 -5.50E+02 3.65E+01 2.69E+00 1.11E-03 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 known from Table 5 that the optical imaging lens group 20 of the second embodiment satisfies the requirements of relational expressions (1) to (15). second embodiment No. Relational value 1 f345/EFL -21.70 2 ∣R31/D31∣ 7.93 3 TT23/S31 -4.69 4 ∣R21/f12∣ 2.77 5 TTL/ImgH 1.57 6 D21/S21 -182.06 7 R22/AT23 -37.13 8 f45/f12 3.01 9 ImgH/TT23 3.54 10 (D22/S22)*(R22/S22) -40.63 11 ∣f23/TT23∣ 7.70 12 ∣R32/D32∣ 2.53 13 f123/f234 2.77 14 ∣D32/S32∣ 36.35 15 (D22/AT23)+(D31/TT23) 14.23 Table five

Referring to FIG. 2B , from left to right in the figure are astigmatic field curvature aberration diagram, F-tanθ 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 aberration in the sagittal direction changes within + 0.06 mm within the entire field of view; the aberration in the meridian direction changes in the entire field of view The amount is within + 0.09 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 20 is less than 2%. 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. 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 diagrams of the third embodiment of the invention in order from left to right.

As shown in FIG. 3A, the optical imaging lens group 30 of the first embodiment includes a first lens 31, a diaphragm ST, a second lens 32, a third lens 33, a fourth lens 34, and a first lens 31 from the object side to the image side. Five lenses35. The optical imaging lens set 30 can further include a filter cover assembly 36 and an imaging surface 37 , wherein the filter cover assembly 36 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 300 can be further disposed on the imaging surface 37 to form an imaging device (not labeled otherwise).

The first lens 31 has positive refractive power, the object side 31a is convex, the image side 31b is concave, and both the object side 31a and the image side 31b are aspherical. The material of the first lens 31 includes plastic, but not limited thereto.

The second lens 32 has positive refractive power, the object side 32a is concave, the image side 32b is convex, and both the object side 32a and the image side 32b are aspherical. The material of the second lens 32 includes plastic, but it is not limited thereto.

The third lens 33 has a negative refractive power. The object side 33 a is convex, the image side 33 b is concave, and both the object side 33 a and the image side 33 b are aspherical. The material of the third lens 33 includes plastic, but it is not limited thereto.

The fourth lens 34 has positive refractive power, the object side 34a is concave, 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 includes plastic, but it is not limited thereto.

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 includes plastic, but it is not limited thereto.

The filter cover assembly 36 is disposed between the fifth lens 35 and the imaging surface 37 for filtering light in a specific wavelength range, such as an infrared light filtering element. The two surfaces 36a, 36b of the filter element 36 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 aspheric coefficients 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= 1.60 mm , Fno = 1.79, HFOV = 44.2 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 31a Aspherical 1.194 0.245 1.5445 55.987 3.20 31b Aspherical 3.505 0.027 aperture ST unlimited 0.080 second lens 32a Aspherical -8.366 0.263 1.5445 55.987 2.55 32b Aspherical -1.208 0.020 third lens 33a Aspherical 3.196 0.160 1.6613 20.373 -3.73 33b Aspherical 1.371 0.202 fourth lens 34a Aspherical -1.152 0.544 1.5677 37.317 0.75 34b Aspherical -0.364 0.030 fifth lens 35a Aspherical 1.150 0.202 1.6397 23.503 -0.81 35b Aspherical 0.334 0.300 Filter cover assembly 36a flat unlimited 0.145 1.5168 64.167 36b flat unlimited 0.283 imaging surface 37 flat unlimited 0.000 Reference wavelength: 555 nm Table six Aspheric coefficient of the third embodiment surface 31a 31b 32a 32b 33a 33b 34a 34b 35a 35b K 4.76E-01 -1.16E+01 -7.15E+00 3.00E-01 8.17E+00 -1.05E+01 -2.96E+00 -3.62E+00 -2.51E+01 -4.72E+00 A ₄ -1.91E-01 -4.71E-02 2.87E-01 -6.69E-02 -1.81E+00 -8.56E-01 -1.50E-01 -1.07E+00 -6.97E-02 -4.23E-01 A ₆ -1.67E-01 -3.07E+00 -1.25E+00 1.77E-01 5.09E+00 2.64E+00 1.98E+00 1.61E+00 -1.60E+00 4.01E-01 A ₈ -1.11E+01 1.02E+01 -3.51E+01 -2.99E+01 -6.87E+01 -1.96E+01 -1.46E+01 1.35E+00 4.82E+00 -3.30E-01 A ₁₀ 5.96E+01 -1.49E+02 2.88E+02 1.08E+02 2.35E+02 7.09E+01 1.15E+02 -1.92E+01 -7.96E+00 2.25E-01 A ₁₂ -2.18E+02 6.40E+02 -1.50E+03 -1.30E+02 -1.48E+02 -1.38E+02 -4.63E+02 6.59E+01 7.98E+00 -1.32E-01 A ₁₄ 2.52E+02 -8.43E+02 3.27E+03 2.20E+02 -1.47E+02 1.23E+02 8.26E+02 -9.24E+01 -4.76E+00 3.94E-02 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 -5.32E+02 4.67E+01 1.30E+00 -2.74E-03 Table seven

In the third embodiment, the values of the relational expressions of the optical imaging lens group 30 are listed in Table VIII. 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 (15). third embodiment No. Relational value 1 f345/EFL -2827.46 2 ∣R31/D31∣ 6.15 3 TT23/S31 -5.13 4 ∣R21/f12∣ 5.35 5 TTL/ImgH 1.57 6 D21/S21 -18.30 7 R22/AT23 -60.40 8 f45/f12 2.44 9 ImgH/TT23 3.59 10 (D22/S22)*(R22/S22) -31.71 11 ∣f23/TT23∣ 15.97 12 ∣R32/D32∣ 2.20 13 f123/f234 2.91 14 ∣D32/S32∣ 701.57 15 (D22/AT23)+(D31/TT23) 25.91 table eight

Referring to FIG. 3B , from left to right in the figure are the astigmatism field curve diagram, F-tanθ 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 aberration in the sagittal direction changes within + 0.06 mm within the entire field of view; the aberration in the meridian direction changes in the entire field of view The amount is within + 0.06 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 30 is less than 2%. 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 + 0.008 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, Distortion, and Longitudinal Spherical Aberration diagrams of the fourth embodiment of the invention in order 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 diaphragm ST, a second lens 42, a third lens 43, a fourth lens 44, and a first lens 41 from the object side to the image side. Five lenses45. The optical imaging lens set 40 can further include a filter cover assembly 46 and an imaging surface 47 , wherein the filter cover assembly 46 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 400 can be further disposed on the imaging surface 47 to form an imaging device (not labeled otherwise).

The first lens 41 has positive 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 aspherical. The material of the first lens 41 includes plastic, but not limited thereto.

The second lens 42 has a positive refractive power, the object side 42 a is convex, the image side 42 b is convex, and both the object side 42 a and the image side 42 b are aspherical. The material of the second lens 42 includes plastic, but not limited thereto.

The third lens 43 has negative refractive power, the object side 43a is convex, the image side 43b is concave, and both the object side 43a and the image side 43b are aspherical. The material of the third lens 43 includes plastic, but it is not limited thereto.

The fourth lens 44 has positive refractive power, the object side 44a is concave, 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 includes plastic, but not limited thereto.

The fifth lens 45 has a negative refractive power. The object side 45 a is convex, the image side 45 b is concave, and both the object side 45 a and the image side 45 b are aspherical. The material of the fifth lens 45 includes plastic, but it is not limited thereto.

The filter cover assembly 46 is disposed between the fifth lens 45 and the imaging surface 47 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 46a, 46b of the filter element 46 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= 1.60 mm , Fno = 1.89, HFOV = 44.2 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 41a Aspherical 1.158 0.278 1.5445 55.987 3.18 41b Aspherical 3.189 0.029 aperture ST unlimited 0.087 second lens 42a Aspherical 10.015 0.290 1.5445 55.987 3.17 42b Aspherical -2.075 0.025 third lens 43a Aspherical 4.442 0.160 1.6713 19.243 -15.61 43b Aspherical 3.083 0.148 fourth lens 44a Aspherical -1.022 0.535 1.5677 37.317 0.70 44b Aspherical -0.343 0.020 fifth lens 45a Aspherical 1.163 0.186 1.6397 23.503 -0.70 45b Aspherical 0.305 0.300 Filter cover assembly 46a flat unlimited 0.145 1.5168 64.167 46b flat unlimited 0.250 imaging surface 47 flat unlimited 0.000 Reference wavelength: 555 nm Table nine The aspheric coefficient of the fourth embodiment surface 41a 41b 42a 42b 43a 43b 44a 44b 45a 45b K 7.72E-01 -4.79E-01 4.65E+01 3.54E-01 4.93E+01 -2.36E+01 -3.11E+00 -3.31E+00 -9.00E+01 -6.01E+00 A ₄ -1.77E-01 -6.18E-01 -6.28E-01 -1.85E+00 -1.52E+00 2.03E-01 -1.92E-01 -1.25E+00 -1.16E+00 -9.15E-01 A ₆ -4.82E-01 6.46E-02 -4.69E+00 -9.47E-01 -5.35E+00 -3.47E+00 1.88E+00 1.08E+00 8.68E-01 1.55E+00 A ₈ -9.28E+00 -4.18E+00 5.19E+01 7.39E+01 5.68E+01 6.57E+00 -7.10E+00 6.75E+00 3.42E+00 -1.64E+00 A ₁₀ 6.32E+01 -2.99E+01 -3.35E+02 -3.21E+02 -1.26E+02 3.27E+01 1.09E+02 -2.33E+01 -8.67E+00 9.38E-01 A ₁₂ -2.03E+02 2.21E+02 1.08E+03 4.24E+02 -1.48E+02 -1.38E+02 -4.63E+02 6.59E+01 7.98E+00 -1.32E-01 A ₁₄ 2.14E+02 -3.43E+02 -1.33E+03 0.00E+00 5.62E+02 1.40E+02 7.79E+02 -9.88E+01 -3.51E+00 -1.47E-01 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 -4.75E+02 5.19E+01 7.34E-01 5.72E-02 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 (15). Fourth embodiment No. Relational value 1 f345/EFL 16.62 2 ∣R31/D31∣ 8.16 3 TT23/S31 -7.28 4 ∣R21/f12∣ 5.77 5 TTL/ImgH 1.54 6 D21/S21 -21.51 7 R22/AT23 -83.02 8 f45/f12 5.52 9 ImgH/TT23 3.35 10 (D22/S22)*(R22/S22) -72.86 11 ∣f23/TT23∣ 8.14 12 ∣R32/D32∣ 4.76 13 f123/f234 2.59 14 ∣D32/S32∣ 19.81 15 (D22/AT23)+(D31/TT23) 21.67 Table Eleven

Referring to FIG. 4B , from left to right in the figure are the astigmatism field curve diagram, F-tanθ 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 within the entire field of view is within + 0.12 mm; the variation of the aberration in the meridian direction is within the entire field of view The amount is within + 0.06 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 40 is less than 2%. 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 + 0.012 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 shows the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the fifth embodiment of the invention in order from left to right.

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

The first lens 51 has positive 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 includes plastic, but it is not limited thereto.

The second lens 52 has a positive refractive power, the object side 52a is concave, the image side 52b is convex, and both the object side 52a and the image side 52b are aspherical. The material of the second lens 52 includes plastic, but not limited thereto.

The third lens 53 has negative refractive power, the object side 53a is concave, the image side 53b is concave, and both the object side 53a and the image side 53b are aspherical. The material of the third lens 53 includes plastic, but not limited thereto.

The fourth lens 54 has positive refractive power, the object side 54a is concave, 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 includes plastic, but it is not limited thereto.

The fifth lens 55 has a negative refractive power. The object side 55 a is convex, 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 includes plastic, but it is not limited thereto.

The filter cover assembly 56 is disposed between the fifth lens 55 and the imaging surface 57 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 56a, 56b of the filter element 56 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= 1.60 mm , Fno = 1.85, HFOV = 44.2 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 51a Aspherical 1.224 0.273 1.5445 55.987 2.84 51b Aspherical 5.365 0.027 aperture ST unlimited 0.076 second lens 52a Aspherical -8.332 0.295 1.5445 55.987 1.69 52b Aspherical -0.842 0.020 third lens 53a Aspherical -14.242 0.150 1.6713 19.243 -1.93 53b Aspherical 1.447 0.203 fourth lens 54a Aspherical -1.325 0.503 1.615 25.92 0.67 54b Aspherical -0.363 0.034 fifth lens 55a Aspherical 2.823 0.206 1.6397 23.503 -0.71 55b Aspherical 0.381 0.300 Filter cover assembly 56a flat unlimited 0.145 1.5168 64.167 56b flat unlimited 0.253 imaging surface 57 flat unlimited 0.000 Reference wavelength: 555 nm Table 12 Aspherical coefficient of the fifth embodiment surface 51a 51b 52a 52b 53a 53b 54a 54b 55a 55b K 5.13E-01 -4.69E+00 1.91E+01 -8.34E-01 -9.75E+02 -3.17E+01 -2.44E+00 -3.97E+00 -2.43E+01 -5.37E+00 A ₄ -2.30E-01 -8.62E-02 1.11E-02 2.19E-01 -1.87E+00 -8.65E-01 -2.17E-01 -1.00E+00 -1.06E-01 -4.14E-01 A ₆ 1.67E-01 -3.41E+00 -7.36E-01 -1.18E+00 6.09E+00 2.84E+00 1.59E+00 1.64E+00 -1.64E+00 4.01E-01 A ₈ -1.06E+01 1.49E+01 -3.49E+01 -2.81E+01 -6.64E+01 -1.99E+01 -1.49E+01 1.21E+00 4.90E+00 -3.47E-01 A ₁₀ 5.89E+01 -1.31E+02 3.02E+02 1.16E+02 2.41E+02 7.01E+01 1.16E+02 -1.95E+01 -8.06E+00 2.31E-01 A ₁₂ -2.23E+02 6.20E+02 -1.51E+03 -1.11E+02 -1.48E+02 -1.38E+02 -4.63E+02 6.59E+01 7.98E+00 -1.32E-01 A ₁₄ 3.08E+02 -9.38E+02 3.29E+03 1.06E+02 -2.32E+02 1.32E+02 8.23E+02 -9.23E+01 -4.73E+00 3.88E-02 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 -5.22E+02 4.73E+01 1.34E+00 -2.19E-03 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 known from Table 14 that the optical imaging lens group 50 of the fifth embodiment satisfies the requirements of relational expressions (1) to (15). fifth embodiment No. Relational value 1 f345/EFL -2.46 2 ∣R31/D31∣ 27.49 3 TT23/S31 -4.15 4 ∣R21/f12∣ 6.93 5 TTL/ImgH 1.56 6 D21/S21 -16.55 7 R22/AT23 -42.12 8 f45/f12 3.30 9 ImgH/TT23 3.41 10 (D22/S22)*(R22/S22) -14.82 11 ∣f23/TT23∣ 22.00 12 ∣R32/D32∣ 2.37 13 f123/f234 3.21 14 ∣D32/S32∣ 35.09 15 (D22/AT23)+(D31/TT23) 25.77 Table Fourteen

Referring to FIG. 5B , from left to right in the figure are the astigmatic field curvature diagram, F-tanθ 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 aberration in the sagittal direction changes within ±0.09 mm within the entire field of view; the aberration in the meridional direction changes in the entire field of view The amount is within ±0.06 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 50 is less than 3%. 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 ±0.006 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. 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 shows the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the sixth embodiment of the invention in order from left to right.

As shown in FIG. 6A, the optical imaging lens group 60 of the first embodiment includes a first lens 61, a diaphragm ST, a second lens 62, a third lens 63, a fourth lens 64, and a first lens 63 from the object side to the image side. Five lenses65. The optical imaging lens set 60 can further include a filter cover assembly 66 and an imaging surface 67 , wherein the filter cover assembly 66 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 600 can be further disposed on the imaging surface 67 to form an imaging device (not otherwise labeled).

The first lens 61 has positive refractive power, the object side 61 a is convex, the image side 61 b is concave, and both the object side 61 a and the image side 61 b are aspherical. The material of the first lens 61 includes plastic, but not limited thereto.

The second lens 62 has positive refractive power, the object side 62a is concave, the image side 62b is convex, and both the object side 62a and the image side 62b are aspherical. The material of the second lens 62 includes plastic, but not limited thereto.

The third lens 63 has a negative refractive power, the object side 63 a is concave, the image side 63 b is concave, and both the object side 63 a and the image side 63 b are aspherical. The material of the third lens 63 includes plastic, but it is not limited thereto.

The fourth lens 64 has positive refractive power, the object side 64a is concave, the image side 64b is convex, and both the object side 64a and the image side 64b are aspherical. The material of the fourth lens 64 includes plastic, but it is not limited thereto.

The fifth lens 65 has a negative refractive power. The object side 65 a is convex, 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 includes plastic, but it is not limited thereto.

The filter cover assembly 66 is disposed between the fifth lens 65 and the imaging surface 67 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 66a, 66b of the filter element 66 are both flat and made of glass.

The image sensor 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 12 and Table 13, respectively. In the sixth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. Sixth embodiment EFL= 1.60 mm , Fno = 1.84, HFOV = 46.6 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 61a Aspherical 0.920 0.270 1.5445 55.987 2.34 61b Aspherical 2.938 0.045 aperture ST unlimited 0.107 second lens 62a Aspherical -15.417 0.335 1.5445 55.987 1.94 62b Aspherical -0.999 0.033 third lens 63a Aspherical -1.050 0.160 1.6613 20.373 -1.47 63b Aspherical 15.167 0.093 fourth lens 64a Aspherical -6.336 0.500 1.6397 23.503 0.72 64b Aspherical -0.443 0.030 fifth lens 65a Aspherical 1.232 0.203 1.6613 20.373 -0.74 65b Aspherical 0.329 0.313 Filter cover assembly 66a flat unlimited 0.145 1.5168 64.167 66b flat unlimited 0.215 imaging surface 67 flat unlimited 0.000 Reference wavelength: 555 nm Table 12 Aspheric Coefficient of the Sixth Embodiment surface 61a 61b 62a 62b 63a 63b 64a 64b 65a 65b K 8.65E-01 7.70E+00 8.43E-02 1.41E+00 -3.27E+01 -1.58E+03 2.34E+01 -1.79E+00 -1.16E+02 -5.12E+00 A ₄ -1.77E-01 1.17E-01 -6.99E-01 3.18E-01 -2.99E+00 -1.55E+00 -8.59E-01 2.06E+00 -5.13E-01 -7.99E-01 A ₆ 1.96E+00 -4.28E+00 4.97E+00 -1.19E+01 9.60E+00 1.05E+01 3.29E+00 -1.62E+01 -3.44E+00 1.27E+00 A ₈ -2.12E+01 3.56E+01 -1.79E+02 -1.56E+01 -7.27E+01 -6.28E+01 -2.09E+01 6.41E+01 1.48E+01 -1.48E+00 A ₁₀ 9.25E+01 -2.16E+02 1.97E+03 5.08E+02 1.25E+02 2.18E+02 7.98E+01 -1.66E+02 -2.70E+01 1.16E+00 A ₁₂ -1.85E+02 4.10E+02 -1.10E+04 -2.31E+03 6.67E+02 -4.57E+02 -1.36E+02 2.79E+02 2.62E+01 -6.02E-01 A ₁₄ 0.00E+00 0.00E+00 2.22E+04 3.77E+03 -1.56E+03 4.17E+02 -3.72E+01 -2.63E+02 -1.33E+01 1.73E-01 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.29E+02 1.03E+02 2.94E+00 -1.90E-02 Table 13

In the sixth embodiment, the values of the relational expressions of the optical imaging lens group 60 are listed in Table 14. It can be known from Table 14 that the optical imaging lens group 60 of the sixth embodiment satisfies the requirements of relational expressions (1) to (15). Sixth embodiment No. Relational value 1 f345/EFL -1.97 2 ∣R31/D31∣ 2.01 3 TT23/S31 -2.54 4 ∣R21/f12∣ 12.42 5 TTL/ImgH 1.45 6 D21/S21 -8.66 7 R22/AT23 -30.26 8 f45/f12 1.99 9 ImgH/TT23 3.19 10 (D22/S22)*(R22/S22) -10.12 11 ∣f23/TT23∣ 12.00 12 ∣R32/D32∣ 24.05 13 f123/f234 4.18 14 ∣D32/S32∣ 4.89 15 (D22/AT23)+(D31/TT23) 16.28 Table Fourteen

Referring to FIG. 6B , from left to right in the figure are the astigmatism field curve diagram, F-tanθ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 60 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the aberration in the sagittal direction changes within ±0.09 mm within the entire field of view; the aberration in the meridional direction changes in the entire field of view The amount is within ±0.09 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 60 is less than 2%. 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 ±0.03 mm. 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

Referring to FIG. 7A and FIG. 7B , FIG. 7A is a schematic diagram of an optical imaging lens group according to a seventh embodiment of the present invention. Fig. 7B shows the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the seventh embodiment of the invention in order from left to right.

As shown in FIG. 7A, the optical imaging lens group 70 of the first embodiment includes a first lens 71, a diaphragm ST, a second lens 72, a third lens 73, a fourth lens 74, and a first lens 71 from the object side to the image side. Five lenses 75. The optical imaging lens set 70 can further include a filter cover assembly 76 and an imaging surface 77 , wherein the filter cover assembly 76 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 700 can be further disposed on the imaging surface 77 to form an imaging device (not labeled otherwise).

The first lens 71 has positive refractive power, the object side 71a is convex, the image side 71b is concave, and both the object side 71a and the image side 71b are aspherical. The material of the first lens 71 includes plastic, but not limited thereto.

The second lens 72 has positive refractive power, the object side 72a is concave, the image side 72b is convex, and both the object side 72a and the image side 72b are aspherical. The material of the second lens 72 includes plastic, but not limited thereto.

The third lens 73 has negative refractive power, the object side 73a is concave, the image side 73b is convex, and both the object side 73a and the image side 73b are aspherical. The material of the third lens 73 includes plastic, but it is not limited thereto.

The fourth lens 74 has positive refractive power, the object side 74a is concave, the image side 74b is convex, and both the object side 74a and the image side 74b are aspherical. The material of the fourth lens 74 includes plastic, but it is not limited thereto.

The fifth lens 75 has a negative refractive power. The object side 75 a is convex, the image side 75 b is concave, and both the object side 75 a and the image side 75 b are aspherical. The material of the fifth lens 75 includes plastic, but it is not limited thereto.

The filter cover assembly 76 is disposed between the fifth lens 75 and the imaging surface 77 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 76a, 76b of the filter element 76 are both flat and made of glass.

The image sensor 700 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 70 of the seventh embodiment are listed in Table 12 and Table 13, respectively. In the seventh embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. Seventh embodiment EFL= 1.60 mm , Fno = 1.80, HFOV = 48.3 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 71a Aspherical 0.946 0.249 1.5445 55.987 2.32 71b Aspherical 3.371 0.040 aperture ST unlimited 0.118 second lens 72a Aspherical -17.201 0.366 1.5445 55.987 1.87 72b Aspherical -0.971 0.033 third lens 73a Aspherical -0.904 0.160 1.6613 20.373 -1.49 73b Aspherical -10.383 0.094 fourth lens 74a Aspherical -5.388 0.500 1.6397 23.503 0.70 74b Aspherical -0.429 0.025 fifth lens 75a Aspherical 1.146 0.198 1.6613 20.373 -0.69 75b Aspherical 0.307 0.313 Filter cover assembly 76a flat unlimited 0.145 1.5168 64.167 76b flat unlimited 0.217 imaging surface 77 flat unlimited 0.000 Reference wavelength: 555 nm Table 12 Aspherical coefficient of the seventh embodiment surface 71a 71b 72a 72b 73a 73b 74a 74b 75a 75b K 1.29E+00 2.67E+00 5.03E-01 1.24E+00 -3.03E+01 -2.23E+03 2.23E+01 -2.04E+00 -1.42E+02 -5.17E+00 A ₄ -2.38E-01 1.04E-01 -7.08E-01 7.61E-01 -2.86E+00 -1.59E+00 -1.07E+00 1.97E+00 -4.87E-01 -8.00E-01 A ₆ 1.35E+00 -4.18E+00 5.32E+00 -1.41E+01 1.03E+01 1.08E+01 3.59E+00 -1.63E+01 -3.52E+00 1.28E+00 A ₈ -1.92E+01 3.08E+01 -1.83E+02 -1.85E+01 -7.55E+01 -6.23E+01 -2.06E+01 6.41E+01 1.47E+01 -1.48E+00 A ₁₀ 8.90E+01 -1.86E+02 1.97E+03 5.39E+02 1.09E+02 2.18E+02 8.06E+01 -1.66E+02 -2.70E+01 1.16E+00 A ₁₂ -2.07E+02 3.49E+02 -1.07E+04 -2.22E+03 6.48E+02 -4.57E+02 -1.34E+02 2.79E+02 2.62E+01 -6.00E-01 A ₁₄ 0.00E+00 0.00E+00 2.11E+04 3.28E+03 -1.38E+03 4.11E+02 -3.65E+01 -2.62E+02 -1.33E+01 1.74E-01 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 2.05E+02 1.02E+02 2.99E+00 -1.95E-02 Table 13

In the seventh embodiment, the values of the relational expressions of the optical imaging lens group 70 are listed in Table 14. It can be known from Table 14 that the optical imaging lens group 70 of the seventh embodiment satisfies the requirements of relational expressions (1) to (15). Seventh embodiment No. Relational value 1 f345/EFL -1.78 2 ∣R31/D31∣ 1.69 3 TT23/S31 -2.51 4 ∣R21/f12∣ 14.14 5 TTL/ImgH 1.41 6 D21/S21 -8.46 7 R22/AT23 -29.43 8 f45/f12 2.25 9 ImgH/TT23 3.13 10 (D22/S22)*(R22/S22) -8.95 11 ∣f23/TT23∣ 13.65 12 ∣R32/D32∣ 16.30 13 f123/f234 4.14 14 ∣D32/S32∣ 4.47 15 (D22/AT23)+(D31/TT23) 16.66 Table Fourteen

Referring to FIG. 7B , from left to right in the figure are the astigmatism field curve diagram, F-tanθ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 70 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the aberration in the sagittal direction changes within ±0.12 mm within the entire field of view; the aberration in the meridian direction changes in the entire field of view The amount is within ±0.09 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 70 is less than 3%. 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 ±0.03 mm. As shown in FIG. 7B , the optical imaging lens group 70 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. Eighth embodiment

Referring to FIG. 8A and FIG. 8B , FIG. 8A is a schematic diagram of an optical imaging lens group according to an eighth embodiment of the present invention. Fig. 8B shows the Astigmatism/Field Curvature, Distortion, and Longitudinal Spherical Aberration diagrams of the eighth embodiment of the invention in sequence from left to right.

As shown in FIG. 8A, the optical imaging lens group 80 of the first embodiment includes a first lens 81, a diaphragm ST, a second lens 82, a third lens 83, a fourth lens 84, and a first lens 81 from the object side to the image side. Five lenses 85. The optical imaging lens set 80 can further include a filter cover assembly 86 and an imaging surface 87 , wherein the filter cover assembly 86 can include a filter element (not shown in the figure) and a protective glass (not shown in the figure). An image sensing element 800 can be further disposed on the imaging surface 87 to form an imaging device (not labeled otherwise).

The first lens 81 has positive refractive power, the object side 81a is convex, the image side 81b is concave, and both the object side 81a and the image side 81b are aspherical. The material of the first lens 81 includes plastic, but not limited thereto.

The second lens 82 has positive refractive power, the object side 82a is concave, the image side 82b is convex, and both the object side 82a and the image side 82b are aspherical. The material of the second lens 82 includes plastic, but not limited thereto.

The third lens 83 has negative refractive power, the object side 83a is concave, the image side 83b is convex, and both the object side 83a and the image side 83b are aspherical. The material of the third lens 83 includes plastic, but not limited thereto.

The fourth lens 84 has positive refractive power, the object side 84a is concave, the image side 84b is convex, and both the object side 84a and the image side 84b are aspherical. The material of the fourth lens 84 includes plastic, but not limited thereto.

The fifth lens 85 has a negative refractive power. The object side 85 a is convex, the image side 85 b is concave, and both the object side 85 a and the image side 85 b are aspherical. The material of the fifth lens 85 includes plastic, but it is not limited thereto.

The filter cover assembly 86 is disposed between the fifth lens 85 and the imaging surface 87 to filter out light in a specific wavelength range, such as an infrared light filter element. The two surfaces 86a, 86b of the filter element 86 are both flat and made of glass.

The image sensor 800 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 80 of the eighth embodiment are listed in Table 12 and Table 13, respectively. In the eighth embodiment, the curve equation of the aspheric surface is expressed in the form of the first embodiment. Eighth embodiment EFL= 1.60 mm , Fno = 1.82, HFOV = 43.9 deg surface surface type Radius of curvature (mm) Distance (mm) Refractive index Dispersion coefficient focal length(mm) subject flat unlimited unlimited first lens 81a Aspherical 0.952 0.248 1.5445 55.987 2.33 81b Aspherical 3.448 0.040 aperture ST unlimited 0.125 second lens 82a Aspherical -18.786 0.365 1.5445 55.987 1.64 82b Aspherical -0.862 0.030 third lens 83a Aspherical -0.727 0.160 1.6613 20.373 -1.59 83b Aspherical -2.522 0.087 fourth lens 84a Aspherical -2.249 0.500 1.6397 23.503 0.67 84b Aspherical -0.396 0.027 fifth lens 85a Aspherical 1.121 0.198 1.6613 20.373 -0.64 85b Aspherical 0.287 0.313 Filter cover assembly 86a flat unlimited 0.145 1.5168 64.167 86b flat unlimited 0.225 imaging surface 87 flat unlimited 0.000 Reference wavelength: 555 nm Table 12 Aspheric coefficient of the eighth embodiment surface 81a 81b 82a 82b 83a 83b 84a 84b 85a 85b K 1.36E+00 -1.10E+01 5.90E-01 1.58E-01 -2.08E+01 -2.19E+02 -8.39E+00 -2.14E+00 -1.45E+02 -5.04E+00 A ₄ -2.20E-01 6.78E-02 -8.53E-01 1.02E+00 -2.74E+00 -1.51E+00 -8.10E-01 1.97E+00 -3.09E-01 -8.00E-01 A ₆ 8.67E-01 -2.70E+00 7.21E+00 -1.42E+01 1.16E+01 1.13E+01 3.78E+00 -1.61E+01 -3.84E+00 1.28E+00 A ₈ -1.55E+01 1.80E+01 -1.93E+02 -2.45E+01 -7.71E+01 -6.33E+01 -2.14E+01 6.41E+01 1.48E+01 -1.50E+00 A ₁₀ 7.56E+01 -1.27E+02 1.91E+03 5.45E+02 9.71E+01 2.16E+02 7.95E+01 -1.66E+02 -2.69E+01 1.16E+00 A ₁₂ -1.87E+02 2.48E+02 -9.75E+03 -2.16E+03 6.49E+02 -4.42E+02 -1.26E+02 2.79E+02 2.62E+01 -5.97E-01 A ₁₄ 0.00E+00 0.00E+00 1.85E+04 3.09E+03 -1.33E+03 3.86E+02 -2.27E+01 -2.62E+02 -1.33E+01 1.72E-01 A ₁₆ 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 1.59E+02 1.02E+02 2.96E+00 -1.95E-02 Table 13

In the eighth embodiment, the values of the relational expressions of the optical imaging lens group 80 are listed in Table 14. It can be seen from Table 14 that the optical imaging lens group 80 of the eighth embodiment satisfies the requirements of relational expressions (1) to (15). Eighth embodiment No. Relational value 1 f348/EFL -1.44 2 ∣R31/D31∣ 1.36 3 TT23/S31 -2.45 4 ∣R21/f12∣ 16.45 5 TTL/ImgH 1.55 6 D21/S21 -8.16 7 R22/AT23 -28.73 8 f45/f12 3.51 9 ImgH/TT23 2.86 10 (D22/S22)*(R22/S22) -7.53 11 ∣f23/TT23∣ 63.40 12 ∣R32/D32∣ 3.94 13 f123/f234 3.71 14 ∣D32/S32∣ 4.49 15 (D22/AT23)+(D31/TT23) 18.29 Table Fourteen

Referring to FIG. 8B , from left to right in the figure are the astigmatism field curve diagram, F-tanθ distortion aberration diagram and longitudinal spherical aberration diagram of the optical imaging lens group 80 . From the astigmatism and field curvature aberration diagram (wavelength 555 nm), it can be seen that the aberration in the sagittal direction changes within ±0.12 mm within the entire field of view; the aberration in the meridian direction changes in the entire field of view The amount is within ±0.06 mm. From the F-tanθ distortion aberration diagram (wavelength 555 nm), it can be seen that the absolute value of the F-tanθ distortion rate of the optical imaging lens group 80 is less than 3%. 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. 8B , the optical imaging lens group 50 of this embodiment has well corrected various aberrations and meets the imaging quality requirements of the optical system. Ninth embodiment

Referring to FIG. 9, an imaging device 1010 includes the optical imaging lens groups 10, 20, 30, 40, 50, 60, 70, 80 of the aforementioned first to eighth embodiments, and an image sensing element 100, 200, 300, 400, 500, 600, 700, 800; wherein, the image sensing elements 100, 200, 300, 400, 500, 600, 700, 800 are arranged in the optical imaging lens group 10, 20, 30, 40, The image planes 17, 27, 37, 47, 57, 67, 77, 87 of 50, 60, 70, 80. The image sensing elements 100 , 200 , 300 , 400 , 500 , 600 , 700 , and 800 are, for example, charge-coupled devices (Charge-Coupled Device, CCD) or complementary metal oxide semiconductor (Complementary Metal Oxide Semiconductor, CMOS) image sensing elements. wait.

In FIG. 9 , an electronic device 1000 according to the ninth embodiment of the present invention includes an imaging device 1010 , wherein the electronic device 1000 can be applied to general 3C products and other electronic products with imaging functions.

Although the invention is described using the aforementioned several embodiments, these embodiments are not intended to limit the scope of the invention. For anyone familiar with this technique, without departing from the spirit and scope of this creation, various changes in form and details can still be made with reference to the embodiments disclosed in this creation. Therefore, what needs to be understood here is that this creation is subject to 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 into the application of this creation within the scope of the patent.

10, 20, 30, 40, 50, 60, 70, 80: Optical imaging lens group

11, 21, 31, 41, 51, 61, 71, 81: the first lens

12, 22, 32, 42, 52, 62, 72, 82: second lens

13, 23, 33, 43, 53, 63, 73, 83: third lens

14, 24, 34, 44, 54, 64, 74, 84: fourth lens

15, 25, 35, 45, 55, 65, 75, 85: fifth lens

16, 26, 36, 46, 56, 66, 76, 86: Filter cover assembly

17, 27, 37, 47, 57, 67, 77, 87: imaging surface

11a, 21a, 31a, 41a, 51a, 61a, 71a, 81a: the object side of the first lens

11b, 21b, 31b, 41b, 51b, 61b, 71b, 81b: image side of the first lens

12a, 22a, 32a, 42a, 52a, 62a, 72a, 82a: the object side of the second lens

12b, 22b, 32b, 42b, 52b, 62b, 72b, 82b: image side of the second lens

13a, 23a, 33a, 43a, 53a, 63a, 73a, 83a: the object side of the third lens

13b, 23b, 33b, 43b, 53b, 63b, 73b, 83b: the image side of the third lens

14a, 24a, 34a, 44a, 54a, 64a, 74a, 84a: the object side of the fourth lens

14b, 24b, 34b, 44b, 54b, 64b, 74b, 84b: the image side of the fourth lens

15a, 25a, 35a, 45a, 55a, 65a, 75a, 85a: the object side of the fifth lens

15b, 25b, 35b, 45b, 55b, 65b, 75b, 85b: image side of the fifth lens

16a, 16b, 26a, 26b, 36a, 36b, 46a, 46b, 56a, 56b, 66a, 66b, 76a, 76b, 86a, 86b: two surfaces of the filter cover assembly

100, 200, 300, 400, 500, 600, 700, 800: Image sensor

1000: electronic device

1010: imaging device

F-tanθ: distortion rate

I: optical axis

ST: Aperture

[Fig. 1A] is a schematic diagram of the optical imaging lens group and imaging device of the first embodiment of the 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 invention; [Fig. 2A] is a schematic diagram of the optical imaging lens group and imaging device of the second embodiment of the invention; [Fig. 2B] From left to right is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the second embodiment of this creation; [Fig. 3A] is a schematic diagram of the optical imaging lens group and imaging device of the third embodiment of the 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 invention; [Fig. 4A] is a schematic diagram of the optical imaging lens group and imaging device 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 invention; [Fig. 5A] is a schematic diagram of the optical imaging lens group and imaging device 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 invention; [Fig. 6A] is a schematic diagram of the optical imaging lens group and imaging device of the sixth embodiment of the present invention; [Fig. 6B] From left to right is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the sixth embodiment of the invention; [Fig. 7A] is a schematic diagram of the optical imaging lens group and imaging device of the seventh embodiment of the present invention; [Fig. 7B] From left to right is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the seventh embodiment of the invention; [Fig. 8A] is a schematic diagram of the optical imaging lens group and imaging device of the eighth embodiment of the present invention; [Fig. 8B] From left to right is the astigmatism field diagram, distortion diagram and longitudinal spherical aberration diagram of the eighth embodiment of the invention; [FIG. 9] is a schematic diagram of the electronic device of the ninth embodiment of the present invention.

10: Optical imaging lens group

11: First lens

12: Second lens

13: Third lens

14: Fourth lens

15: fifth lens

16:Filter cover assembly

17: 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, 16b: the two surfaces of the filter cover assembly

100: Image sensing element

I: optical axis

ST: Aperture

Claims (17)

An optical imaging lens group sequentially includes from the object side to the image side: A first lens with positive refractive power, and its object side is convex; A second lens with refractive power, and its image side is convex; a third lens with refractive power; a fourth lens having positive refractive power; and A fifth lens with refractive power, and its image side is concave; Wherein, the total number of lenses of the optical imaging lens group is five pieces; the combined focal length of the third lens to the fifth lens is f345, and the effective focal length of the optical imaging lens group is EFL, which satisfies the following relationship: 0< f345/EFL < 20.0. 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 R31, and the optical effective radius of the object side of the third lens perpendicular to the optical axis is D31, which satisfies the following relationship : 0 <∣R31/D31∣ < 30.0. Such as the optical imaging lens group of item 1 of the scope of the patent application, wherein the distance between the object side of the second lens and the image side of the three lenses on the optical axis is TT23, and the object side of the third lens has an intersection with the optical axis, And the object side of the third lens has a critical point, and a projected distance from the intersection point to the critical point on the optical axis is S31, which satisfies the following relationship: -2.0<TT23/S31<-10.0. Such as the optical imaging lens group of item 1 of the scope of application, wherein the radius of curvature of the object side of the second lens is R21, and the combined focal length from the first lens to the second lens is f12, which satisfies the following relationship: 0 ＜∣R21/f12∣＜20.0. For example, the optical imaging lens group of item 1 of the patent scope, wherein the maximum image height of the optical imaging lens group is ImgH, the total length of the optical imaging lens group is TTL, and the following relationship is satisfied: 1.0<TTL/ImgH < 2.0. An optical imaging lens group sequentially includes from the object side to the image side: A first lens with positive refractive power, and its object side is convex; A second lens with positive refractive power, whose image side is convex; a third lens with refractive power; a fourth lens having positive refractive power; and a fifth lens with refractive power; Wherein, the total number of lenses in the optical imaging lens group is five pieces; the optical effective radius of the object side of the second lens perpendicular to the optical axis is D21, the object side of the second lens has an intersection with the optical axis, and the second lens There is a critical point on the side of the object, and a projection distance from the intersection point to the critical point on the optical axis is S21, which satisfies the following relationship: D21/S21<-5.0. Such as the optical imaging lens group of item 6 of the scope of application, wherein the radius of curvature of the image side of the second lens is R22, 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 is AT23. Satisfy the following relationship: R22/AT23 < 0. For example, the optical imaging lens group of item 6 of the scope of application, wherein 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 second lens is f12, which satisfy the following relationship Formula: 0 < f45/f12 < 8.0. Such as the optical imaging lens group of item 6 of the patent scope, wherein, the maximum image height of the optical imaging lens group is ImgH, and the distance from the object side of the second lens to the image side of the three lenses on the optical axis is TT23, which is TT23. Satisfy the following relationship: 1.0 < ImgH/TT23 < 5.0. Such as the optical imaging lens group of item 6 of the scope of the patent application, wherein the optical effective radius of the second lens image side perpendicular to the optical axis is D22, the second lens image side and the optical axis have an intersection, and the second lens There is a critical point on the side of the lens image, a projection distance from the intersection point to the critical point on the optical axis is S22, and the radius of curvature of the second lens image side is R22, which satisfies the following relationship: -90.0 < (D22/S22 )*(R22/S22) < -5.0. An optical imaging lens group sequentially includes from the object side to the image side: A first lens with positive refractive power, and its object side is convex; a second lens with refractive power; a third lens with negative refractive power; a fourth lens having positive refractive power; and A fifth lens with refractive power, and its image side is concave; Wherein, the total number of lenses in the optical imaging lens group is five pieces; the combined focal length from the second lens to the third lens is f23, and the distance on the optical axis from the object side of the second lens to the image side of the three lenses is TT23 , which satisfies the following relationship: 0 <∣ f23/TT23∣ < 70.0. For example, the optical imaging lens group of item 11 of the scope of the patent application, wherein the radius of curvature of the third lens image side is R32, and the optical effective radius of the third lens image side perpendicular to the optical axis is D32, which satisfies the following relationship : 0 < ∣R32/D32∣ < 35.0. For example, the optical imaging lens group of item 11 of the scope of application, wherein the combined focal length from the first lens to the third lens is f123, and the combined focal length from the second lens to the fourth lens is f234, which satisfy the following relationship Formula: 1.0 < f123/f234 < 5. Such as the optical imaging lens group of item 11 of the patent scope, wherein, the optical effective radius of the image side of the third lens perpendicular to the optical axis is D32, the image side of the third lens has an intersection with the optical axis, and the third lens There is a critical point on the side of the lens image, and a projected distance from the intersection point to the critical point on the optical axis is S32, which satisfies the following relationship: |D32/S32|<750.0. For example, the optical imaging lens group of item 11 of the scope of application, wherein the optical effective radius of the second lens image side perpendicular to the optical axis is D22, and the optical effective radius of the third lens object side perpendicular to the optical axis is D31, 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: 10.0<(D22/AT23)+(D31/TT23)<40.0. An imaging device, which includes an optical imaging lens group as claimed in item 1, item 6 or item 10 of the scope of the patent application and an image sensing element, wherein the image sensing element is arranged on the optical imaging lens group imaging surface. An electronic device, which includes the imaging device described in claim 16 of the patent application.

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