TW202144853A - Optical imaging lens - Google Patents

Abstract

In an optical imaging lens, a first lens element is the first element from an object side to an image side and has negative refracting power, a second lens element is the second element from the object side to the image side and has negative refracting power, a third lens element is the third element from the object side to the image side and an optical axis region of the object-side surface of the third lens element is concave, a fourth lens element is the fourth element from the object side to the image side and an optical axis region of the object-side surface of the fourth lens element is convex, a fifth lens element is the fifth element from the object side to the image side and an optical axis region of the object-side surface of the fifth lens element is convex, a sixth lens element is the second element from the image side to the object side and a seventh lens element is the first element from the image side to the object side to satisfy: (G23+T3+T4+G45)/L57≥2.700 and υ1+υ2≤80.000.

Description

Optical imaging lens

The present invention generally relates to an optical imaging lens. Specifically, the present invention is particularly directed to an optical imaging lens mainly used for photographic electronic devices such as photographing and video recording, for example, it can be applied to portable devices such as mobile phones, cameras, tablet computers, and personal digital assistants (PDAs). electronic devices, and optical imaging lenses for vehicle photography devices.

In recent years, the application of optical imaging lenses in the field of automotive photography has become more and more diverse, from reversing display, 360-degree surround view, lane shift system to advanced driver assistance system (ADAS). In order to better meet the needs of consumers, the optical imaging lens must have good thermal stability at different temperatures. In addition, the wider the angle that the optical imaging lens can shoot is also a development trend.

Therefore, how to provide a vehicle optical imaging lens with better thermal stability, wide angle and conforming imaging quality is a research topic.

Therefore, various embodiments of the present invention provide a wide-angle, thermally stable, and technically feasible optical imaging lens. From the object side to the image side of the optical imaging lens of the present invention, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and other necessary lenses are arranged on the optical axis. Eighth lens. The eighth lens may be arranged between the fifth lens and the sixth lens. The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, the seventh lens and the eighth lens respectively have the object side facing the object side and allowing the imaging light to pass through, and the object side facing the image The side of the image through which the imaging light passes.

In an embodiment of the present invention, the first lens is the first lens counted from the object side to the image side, the first lens has a negative refractive index, and the second lens is the first lens counted from the object side to the image side Two lenses, the second lens has a negative refractive power, the third lens is the third lens from the object side to the image side, the optical axis area of the object side of the third lens is concave, and the fourth lens is from the object side The fourth lens counted from the side to the image side and the optical axis area of the object side of the fourth lens is convex, the fifth lens is the fifth lens counted from the object side to the image side, and the object side of the fifth lens is The optical axis region is a convex surface, the sixth lens is the second lens from the image side to the object side, and the seventh lens is the first lens from the image side to the object side. υ1 is the Abbe number of the first lens, υ2 is the Abbe number of the second lens, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, and G23 is the thickness of the second lens. The distance from the image side to the object side of the third lens on the optical axis, G45 is the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens, L57 is the object side of the fifth lens to the seventh lens The distance of the object side on the optical axis, and the optical imaging lens complies with (G23+T3+T4+G45)/L57≧2.700 and υ1+υ2≦80.000.

In another embodiment of the present invention, the first lens is the first lens counted from the object side to the image side, the first lens has a negative refractive index, and the second lens is counted from the object side to the image side The second lens has a negative refractive index, the third lens is the third lens from the object side to the image side, and the optical axis area of the object side of the third lens is concave, and the fourth lens is The fourth lens counted from the object side to the image side, the fifth lens is the fifth lens counted from the object side to the image side, and the optical axis area of the object side of the fifth lens is convex, and the sixth lens is from the The second lens from the image side to the object side and the seventh lens are the first lenses from the image side to the object side. T5 is the thickness of the fifth lens on the optical axis, T7 is the thickness of the seventh lens on the optical axis, G34 is the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, and the optical imaging lens Comply with (T3+T7)/(G34+T5)≧3.200 and υ1+υ2≦80.000.

In yet another embodiment of the present invention, the first lens is the first lens counted from the object side to the image side, the first lens has a negative refractive index, and the second lens is counted from the object side to the image side The second lens and the second lens have a negative refractive power, the third lens is the third lens counted from the object side to the image side, the optical axis area of the object side of the third lens is concave, and the fourth lens is from the object side to the image side. The fourth lens counted from the object side to the image side, the fifth lens is the fifth lens counted from the object side to the image side, and the circumferential area of the object side of the fifth lens is convex, and the sixth lens is from the image side. The second lens from the object side and the seventh lens are the first lens from the image side to the object side. The optical imaging lens conforms to (T3+T7)/(G34+T5)≧3.200 and υ1+υ2≦80.000.

In the optical imaging lens of the present invention, the embodiment may further selectively satisfy the following conditions:

1. (G12+G23)/EFL≧3.400;

2. ALT/(T3+G45)≦2.700;

3. AAG/(G12+T3)≦2.200;

4. (T1+T5)/T2≦2.800;

5. (T7+BFL)/T4≦3.600;

6. G45/T2≧1.900;

7. T3/(T2+G34)≧2.000;

8. TTL/(G12+G23+G45)≦3.500;

9. (G23+T4)/T2≧4.000;

10. ALT/(T3+G67)≦4.800;

11. BFL/EFL≧1.400;

12. TL/(T2+T3+T4)≦4.500;

13. (T1+G56)/T6≦5.500;

14. (T4+G45)/EFL≧2.100;

15. (G23+BFL)/(G34+T4)≧2.500;

16. HFOV/(TL+EFL) ≧3.000∘/mm.

Wherein, T1 is the thickness of the first lens on the optical axis; T2 is the thickness of the second lens on the optical axis; T6 is the thickness of the sixth lens on the optical axis; G12 is the image side of the first lens to the object of the second lens The distance of the side on the optical axis; G56 is the distance on the optical axis from the image side of the fifth lens to the object side of the sixth lens; G67 is the distance on the optical axis from the image side of the sixth lens to the object side of the seventh lens; ALT is The sum of the lens thicknesses of the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens on the optical axis; TL is the image from the object side of the first lens to the seventh lens The distance of the side on the optical axis; TTL is the distance from the object side of the first lens to the imaging surface on the optical axis; BFL is the distance from the image side of the seventh lens to the imaging surface on the optical axis; AAG is the image of the first lens The distance from the side to the object side of the second lens on the optical axis, the distance from the image side of the second lens to the object side of the third lens on the optical axis, the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, The distance from the image side of the fourth lens to the object side of the fifth lens on the optical axis, the distance from the image side of the fifth lens to the object side of the sixth lens on the optical axis, and the distance from the image side of the sixth lens to the object side of the seventh lens on the optical axis EFL is the effective focal length of the optical imaging lens; HFOV is the half angle of view of the optical imaging lens; ImgH is the image height of the optical imaging lens; Fno is the aperture value of the optical imaging lens.

The terms "optical axis area", "circumferential area", "concave surface" and "convex surface" used in this specification and the scope of the patent application should be construed based on the definitions listed in this specification.

The optical system of this specification includes at least one lens, which receives the imaging light that is parallel to the optical axis of the incident optical system and has an angle of half angle of view (HFOV) relative to the optical axis. The imaging light is imaged on the imaging surface through the optical system. The expression "a lens has a positive refractive power (or a negative refractive power)" means that the paraxial refractive power of the lens is positive (or negative) calculated by the Gaussian optical theory. The so-called "object side (or image side) of the lens" is defined as the specific range of the imaging light passing through the surface of the lens. Imaging rays include at least two types of rays: chief ray (chief ray) Lc and marginal ray (marginal ray) Lm (as shown in Figure 1). The object side (or image side) of the lens can be divided into different areas according to different positions, including the optical axis area, the circumferential area, or in some embodiments, one or more relay areas, the description of these areas will be detailed below elaborate.

FIG. 1 is a radial cross-sectional view of lens 100 . Two reference points on the surface of the lens 100 are defined: the center point and the transition point. The center point of the lens surface is an intersection of the surface with the optical axis I. As illustrated in FIG. 1 , the first center point CP1 is located on the object side 110 of the lens 100 , and the second center point CP2 is located on the image side 120 of the lens 100 . The transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB that defines the lens surface is the point at which the radially outermost marginal ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. Besides, if there are a plurality of conversion points on the surface of a single lens, the conversion points are named sequentially from the first conversion point in the radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in FIG. 4 ), and the Nth transition point (farthest from the optical axis I).

A range from the center point to the first transition point TP1 is defined as an optical axis area, wherein the optical axis area includes the center point. The area of the Nth conversion point farthest from the optical axis I radially outward to the optical boundary OB is defined as a circumferential area. In some embodiments, a relay area may be further included between the optical axis area and the circumference area, and the number of relay areas depends on the number of conversion points.

When the light rays parallel to the optical axis I pass through an area, if the light rays are deflected toward the optical axis I and the intersection with the optical axis I is at the image side A2 of the lens, the area is convex. When a light ray parallel to the optical axis I passes through an area, if the intersection of the extension line of the light ray and the optical axis I is on the object side A1 of the lens, the area is concave.

In addition, referring to FIG. 1 , the lens 100 may further include an assembly portion 130 extending radially outward from the optical boundary OB. The assembling part 130 is generally used for assembling the lens 100 to a corresponding element (not shown) of the optical system. The imaging light does not reach the assembly part 130 . The structure and shape of the assembling portion 130 are only examples for illustrating the present invention, and are not intended to limit the scope of the present invention. The assembly portion 130 of the lens discussed below may be partially or completely omitted from the drawings.

Referring to FIG. 2 , an optical axis region Z1 is defined between the center point CP and the first transition point TP1 . A circumferential zone Z2 is defined between the first transition point TP1 and the optical boundary OB of the lens surface. As shown in FIG. 2 , the parallel ray 211 intersects with the optical axis I at the image side A2 of the lens 200 after passing through the optical axis area Z1 , that is, the focal point of the parallel ray 211 passing through the optical axis area Z1 is at the R point of the image side A2 of the lens 200 . Since the ray intersects with the optical axis I at the image side A2 of the lens 200, the optical axis region Z1 is a convex surface. On the contrary, the parallel rays 212 diverge after passing through the circumferential area Z2. As shown in FIG. 2 , the extension line EL after the parallel ray 212 passes through the circumferential area Z2 intersects with the optical axis I at the object side A1 of the lens 200 , that is, the focal point of the parallel ray 212 passing through the circumferential area Z2 is located at the M point of the object side A1 of the lens 200 . Since the extension line EL of the light and the optical axis I intersect at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. In the lens 200 shown in FIG. 2 , the first transition point TP1 is the boundary between the optical axis area and the circumference area, that is, the first transition point TP1 is the boundary point between the convex surface and the concave surface.

On the other hand, the surface shape concave and convex of the optical axis region can also be judged according to the judgment method of ordinary knowledgeable persons in the field, that is, by the sign of the paraxial curvature radius (abbreviated as R value) to judge the optical axis region surface of the lens shaped bumps. R-values are commonly used in optical design software such as Zemax or CodeV. R-values are also commonly found in lens data sheets of optical design software. For the side of the object, when the value of R is positive, it is determined that the optical axis area of the side of the object is convex; when the value of R is negative, the area of the optical axis of the side of the object is determined to be concave. Conversely, for the image side, when the R value is positive, the optical axis area of the image side is determined to be concave; when the R value is negative, the optical axis area of the image side is determined to be convex. The results determined by this method are consistent with the results of the aforementioned method of determining the intersection of the ray/ray extension line and the optical axis. The determination method of the intersection point of the ray/ray extension line and the optical axis is that the focal point of a light parallel to the optical axis is located on the lens. The object side or the image side to judge the unevenness of the surface. "A region is convex (or concave)", "a region is convex (or concave)" or "a convex (or concave) region" described in this specification may be used interchangeably.

3 to 5 provide examples of judging the surface shape of the lens area and the area boundary in each case, including the aforementioned optical axis area, circumferential area and relay area.

FIG. 3 is a radial cross-sectional view of lens 300 . Referring to FIG. 3 , there is only one transition point TP1 on the image side 320 of the lens 300 within the optical boundary OB. The optical axis area Z1 and the circumferential area Z2 of the image side surface 320 of the lens 300 are as shown in FIG. 3 . The R value of the image side surface 320 is positive (that is, R>0), therefore, the optical axis region Z1 is a concave surface.

Generally speaking, the surface shape of each area bounded by the transition point is opposite to that of the adjacent area. Therefore, the transition point can be used to define the transition of the surface shape, that is, from the transition point from concave to convex or from convex to concave. In FIG. 3 , since the optical axis region Z1 is a concave surface, and the surface shape changes at the transition point TP1 , the circumferential region Z2 is a convex surface.

FIG. 4 is a radial cross-sectional view of lens 400 . Referring to FIG. 4 , a first transition point TP1 and a second transition point TP2 exist on the object side surface 410 of the lens 400 . The optical axis region Z1 of the object side surface 410 is defined between the optical axis I and the first conversion point TP1. The R value of the object side surface 410 is positive (that is, R>0), therefore, the optical axis region Z1 is a convex surface.

A circumferential area Z2 is defined between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 , and the circumferential area Z2 of the object side surface 410 is also a convex surface. Besides, a relay zone Z3 is defined between the first transition point TP1 and the second transition point TP2 , and the relay zone Z3 of the object side surface 410 is a concave surface. Referring to FIG. 4 again, the object side surface 410 includes the optical axis region Z1 between the optical axis I and the first transition point TP1, and is located between the first transition point TP1 and the second transition point TP2 from the optical axis I radially outward in sequence The relay zone Z3 of , and the circumferential zone Z2 between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 . Since the optical axis area Z1 is convex, the surface shape changes from the first transition point TP1 to concave, so the relay area Z3 is concave, and the surface shape changes from the second transition point TP2 to convex again, so the circumferential area Z2 is convex.

FIG. 5 is a radial cross-sectional view of lens 500 . The object side 510 of the lens 500 has no transition point. For a lens surface without a conversion point, such as the object side 510 of the lens 500, 0-50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, from the optical axis I to the optical axis of the lens surface. 50~100% of the distance between the boundaries OB is the circumference area. Referring to the lens 500 shown in FIG. 5 , 50% of the distance from the optical axis I to the optical boundary OB on the surface of the lens 500 is defined as the optical axis region Z1 of the object side surface 510 . The R value of the object side surface 510 is positive (that is, R>0), therefore, the optical axis region Z1 is a convex surface. Since the object side surface 510 of the lens 500 has no transition point, the circumferential area Z2 of the object side surface 510 is also convex. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

As shown in FIG. 6 , the optical imaging lens 1 of the present invention is mainly composed of eight lenses along the optical axis I from the object side A1 on which the object (not shown) is placed to the image side A2 for imaging. It sequentially includes a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, an aperture 99, a fifth lens 50, an eighth lens 80, a sixth lens 60, a seventh lens 70, and an imaging surface (image plane) 91. Generally speaking, the first lens 10 , the second lens 20 , the third lens 30 , the fourth lens 40 , the fifth lens 50 , the sixth lens 60 , the seventh lens 70 and the eighth lens 80 can be made of transparent glass material, but the present invention is not limited to this. Each lens has the appropriate refractive power. In the optical imaging lens 1 of the present invention, the lenses with refractive power are only the first lens 10, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, and the seventh lens. 70 and the eighth lens 80 are eight lenses. The optical axis I is the optical axis of the entire optical imaging lens 1 , so the optical axis of each lens and the optical axis of the optical imaging lens 1 are the same.

In addition, an aperture stop 99 of the present optical imaging lens 1 is set at an appropriate position. In FIG. 6 , the aperture 99 is provided between the fourth lens 40 and the fifth lens 50 . When the light (not shown) emitted by the object to be photographed (not shown) at the object side A1 enters the optical imaging lens 1 of the present invention, it will pass through the first lens 10 , the second lens 20 , the third lens 10 and the third lens in sequence. After the lens 30 , the fourth lens 40 , the aperture 99 , the fifth lens 50 , the eighth lens 80 , the sixth lens 60 , the seventh lens 70 , the filter 90 and the cover glass 95 , the lens will be on the image side A2 The image is focused on the imaging plane 91 to form a clear image. In each embodiment of the present invention, the filter 90 is disposed between the image side 72 and the imaging surface 91 of the seventh lens 70, and it can be a filter with various suitable functions, such as: an infrared cut filter (IR cut filter), which is used to prevent infrared rays in the imaging light from being transmitted to the imaging surface 91 and affecting the imaging quality. The filter 90 can selectively filter out, for example, the wavelengths between 780 nm and 920 nm and the wavelengths after 960 nm, but the invention is not limited to this.

Each lens in the optical imaging lens 1 of the present invention has an object side facing the object side A1 and passing the imaging light, and an image side facing the image side A2 and passing the imaging light. In addition, each lens in the optical imaging lens 1 of the present invention also has an optical axis area and a circumference area, respectively. For example, the first lens 10 has an object side 11 and an image side 12; the second lens 20 has an object side 21 and an image side 22; the third lens 30 has an object side 31 and an image side 32; the fourth lens 40 has an object side 41 and an image side 32; Image side 42; fifth lens 50 has object side 51 and image side 52; sixth lens 60 has object side 61 and image side 62; seventh lens 70 has object side 71 and image side 72; eighth lens 80 has object side 81 and like side 82. Each object side surface and image side surface respectively have an optical axis area and a circumferential area.

Each lens in the optical imaging lens 1 of the present invention also has a thickness T located on the optical axis I, respectively. For example, the first lens 10 has a first lens thickness T1, the second lens 20 has a second lens thickness T2, the third lens 30 has a third lens thickness T3, the fourth lens 40 has a fourth lens thickness T4, and the fifth lens 50 The sixth lens 60 has a sixth lens thickness T6, the seventh lens 70 has a seventh lens thickness T7, and the eighth lens 80 has an eighth lens thickness T8. ALT is the sum of the thicknesses of the first lens, the second lens 20, the third lens 30, the fourth lens 40, the fifth lens 50, the sixth lens 60, and the seventh lens 70 on the optical axis I in the optical imaging lens 1 of the present invention . That is, ALT=T1+ T2+ T3+ T4+ T5+T6+T7.

In addition, in the optical imaging lens 1 of the present invention, there is an air gap distance located on the optical axis I between the respective lenses. For example, G12 is the distance from the image side 12 of the first lens 10 to the object side 21 of the second lens 20 on the optical axis I, G23 is the distance between the image side 22 of the second lens 20 and the object side 31 of the third lens 30 on the optical axis The distance on axis I, G34 is the distance from the image side 32 of the third lens 30 to the object side 41 of the fourth lens 40 on the optical axis I, G45 is the image side 42 of the fourth lens 40 to the object of the fifth lens 50 The distance of the side 51 on the optical axis I, G56 is the distance from the image side 52 of the fifth lens 50 to the object side 61 of the sixth lens 60 on the optical axis I, G67 is the image side 62 of the sixth lens 60 to the seventh The distance of the object side 71 of the lens 70 on the optical axis I. Therefore, the distance from the image side 12 of the first lens 10 to the object side 21 of the second lens 20 on the optical axis I, the distance from the image side 22 of the second lens 20 to the object side 31 of the third lens 30 on the optical axis, the third The distance from the image side 32 of the lens 30 to the object side 41 of the fourth lens 40 on the optical axis I, the distance from the image side 42 of the fourth lens 40 to the object side 51 of the fifth lens 50 on the optical axis I, the image side of the fifth lens 50 The sum of the distance from 52 to the object side 61 of the sixth lens 60 on the optical axis I and the distance from the image side 62 of the sixth lens 60 to the object side 71 of the seventh lens 70 on the optical axis I is called AAG. That is, AAG=G12+G23+G34+G45+G56+G67. G58 is the distance from the fifth lens 50 image side 52 to the eighth lens 80 object side 81 on the optical axis 1; G86 is the eighth lens 80 image side 82 to the sixth lens 60 object side 61 The distance on the optical axis 1; L57 is the distance on the optical axis I from the object side surface 51 of the fifth lens 50 to the object side surface 71 of the seventh lens 70 .

In addition, the distance from the object side surface 11 of the first lens 10 to the imaging surface 91 on the optical axis I is the system length TTL of the optical imaging lens 1 . The effective focal length of the optical imaging lens 1 is EFL, and the distance from the object side 11 of the first lens 10 to the image side 72 of the seventh lens 70 on the optical axis I is TL. HFOV is the half angle of view of the optical imaging lens 1 , that is, half of the maximum field of view (Field of View), ImgH (image height) is the image height of the optical imaging lens 1 , and Fno is the aperture value of the optical imaging lens 1 .

When the filter 90 is arranged between the seventh lens 70 and the imaging surface 91, G7F represents the air gap from the seventh lens 70 to the filter 90 on the optical axis I, TF represents the filter 90 on the optical axis I GFP represents the distance from the image side of the filter 90 to the imaging surface 91 on the optical axis I, and BFL is the back focal length of the optical imaging lens 1, that is, the image side 72 of the seventh lens 70 to the imaging surface 91 is in the optical axis. Distance on axis I, ie BFL=G7F+TF+GFP.

In addition, redefine: υ1 is the Abbe number of the first lens 10; υ2 is the Abbe number of the second lens 20; υ3 is the Abbe number of the third lens 30; υ4 is the Abbe number of the fourth lens 40; υ5 ν6 is the Abbe number of the sixth lens 60 ; ν7 is the Abbe number of the seventh lens 70 ; ν8 is the Abbe number of the eighth lens 80 .

first embodiment

Please refer to FIG. 6 , which illustrates the first embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 91 of the first embodiment, please refer to FIG. 7A . For the field curvature in the sagittal direction, please refer to FIG. 7B . For the field curvature in the tangential direction, please refer to FIG. 7B . Please refer to FIG. 7C for curvature aberration and FIG. 7D for distortion aberration. The Y-axis of each spherical aberration map in all embodiments represents the field of view, and its highest point is 1.0. The Y-axis of each aberration map and distortion map in the embodiments represents the image height. The system image height of the first embodiment (Image Height , ImgH) is 2.890 mm.

The optical imaging lens 1 of the first embodiment is mainly composed of eight lenses with refractive power, an aperture 99 , and an imaging surface 91 . The aperture 99 of the first embodiment is disposed between the fourth lens 40 and the fifth lens 50 .

The first lens 10 is the first lens counted from the object side A1 to the image side A2. The first lens 10 has a negative refractive power. The optical axis region 13 of the object side 11 of the first lens 10 is convex and its circumferential region 14 is convex, and the optical axis region 16 of the image side 12 of the first lens 10 is concave and its circumferential region 17 is concave. The object side surface 11 and the image side surface 12 of the first lens 10 may be spherical, but not limited thereto.

The second lens 20 is the second lens counted from the object side A1 to the image side A2. The second lens 20 has a negative refractive power. The optical axis region 23 of the object side 21 of the second lens 20 is convex and its circumferential region 24 is convex, and the optical axis region 26 of the image side 22 of the second lens 20 is concave and its circumferential region 27 is concave. The object side surface 21 and the image side surface 22 of the second lens 20 may be spherical, but not limited thereto.

The third lens 30 is the third lens counted from the object side A1 to the image side A2. The third lens 30 has a positive refractive index, the optical axis region 33 of the object side surface 31 of the third lens 30 is concave and the circumferential region 34 thereof is concave, the optical axis region 36 of the image side surface 32 of the third lens 30 is convex and its peripheral region 34 is concave. The circumferential area 37 is convex. The object side surface 31 and the image side surface 32 of the third lens 30 may be aspherical, but not limited thereto.

The fourth lens 40 is the fourth lens counted from the object side A1 to the image side A2. The fourth lens 40 has a positive refractive index, the optical axis region 43 of the object side surface 41 of the fourth lens 40 is convex and the circumferential region 44 thereof is convex, and the optical axis region 46 of the image side 42 of the fourth lens 40 is concave and its circumference. The circumferential area 47 is concave. The object side surface 41 and the image side surface 42 of the fourth lens 40 may be spherical, but not limited thereto.

The fifth lens 50 is the fifth lens counted from the object side A1 to the image side A2. The fifth lens 50 has a negative refractive power, the optical axis region 53 of the object side 51 of the fifth lens 50 is convex and the circumferential region 54 thereof is convex, and the optical axis region 56 of the image side 52 of the fifth lens 50 is concave and its peripheral region 54 is convex. The circumferential area 57 is concave. The object side surface 51 and the image side surface 52 of the fifth lens 50 may be spherical, but not limited thereto.

The eighth lens 80 is interposed between the fifth lens 50 and the sixth lens 60 . The eighth lens 80 has a positive refractive index, the optical axis area 83 of the object side surface 81 of the eighth lens 80 is convex and the circumferential area 84 thereof is convex, and the optical axis area 86 of the image side 82 of the eighth lens 80 is convex and its peripheral area 84 is convex. The circumferential area 87 is convex. The object side surface 81 and the image side surface 82 of the eighth lens 80 may be spherical, but not limited thereto.

The sixth lens 60 is the second lens counted from the image side A2 to the object side A1. The sixth lens 60 has a negative refractive power, the optical axis region 63 of the object side surface 61 of the sixth lens 60 is concave and the circumferential region 64 thereof is concave, and the optical axis region 66 of the image side 62 of the sixth lens 60 is concave and its peripheral region 64 is concave. The circumferential area 67 is concave. The object side surface 61 and the image side surface 62 of the sixth lens 60 may be spherical, but not limited thereto.

The seventh lens 70 is the first lens counted from the image side A2 to the object side A1. The seventh lens 70 has a positive refractive index, the optical axis region 73 of the object side surface 71 of the seventh lens 70 is convex and the circumferential region 74 thereof is convex, and the optical axis region 76 of the image side 72 of the seventh lens 70 is convex and its peripheral region 74 is convex. The circumferential area 77 is convex. The object side surface 71 and the image side surface 72 of the seventh lens 70 may be aspherical, but not limited thereto.

In the optical imaging lens 1 of the present invention, from the first lens 10 to the seventh lens 70, the object side 11/21/31/41/51/81/61/71 and the image side 12/22/32/42/52/ 82/62/72 may be aspherical, but not limited thereto. In the case of aspherical surfaces, these aspherical surfaces are defined by the following formula:

in:

Y represents the vertical distance between the point on the aspheric surface and the optical axis I;

Z represents the depth of the aspheric surface (the point on the aspheric surface that is Y from the optical axis I, and the tangent plane tangent to the vertex on the optical axis I of the aspheric surface, the vertical distance between the two);

R represents the radius of curvature of the lens surface near the optical axis I;

K is the conic constant;

a _2i is the 2i-th order aspheric coefficient.

The optical data of the optical imaging lens system of the first embodiment is shown in FIG. 18 , and the aspherical surface data is shown in FIG. 19 . The optical design of the first embodiment has good thermal stability. The normal temperature of 20°C is set as a benchmark. At this temperature, the back focal shift (back focal shift) is 0.000 millimeters (mm), and the temperature rises to 80°C. , the back focus offset is -0.006mm, while cooling down to -40°C has a back focus offset of 0.001mm. In the optical imaging lens system of the following embodiments, the f-number (f-number) of the overall optical imaging lens is Fno, the effective focal length (EFL), and the Half Field of View (HFOV) are in the overall optical imaging lens. Half of the maximum angle of view (Field of View), where the back focal length offset, image height, curvature radius, thickness and focal length of the optical imaging lens are all in millimeters (mm). In this embodiment, EFL=1.481 mm; HFOV=119.870 degrees; TTL=29.845 mm; Fno=2.000; ImgH=2.890 mm.

Second Embodiment

Please refer to FIG. 8 , which illustrates a second embodiment of the optical imaging lens 1 of the present invention. Please note that starting from the second embodiment, in order to simplify and clearly express the drawings, only the optical axis area and the circumferential area of the different surface shapes of each lens and the first embodiment are specially marked on the drawing, and the rest are the same as those of the first embodiment. The optical axis area and the circumferential area of the same surface shape of the lens, such as concave surface or convex surface, are not marked otherwise. Please refer to FIG. 9A for the longitudinal spherical aberration on the imaging plane 91 of the second embodiment, please refer to FIG. 9B for the field curvature aberration in the sagittal direction, please refer to FIG. 9C for the field curvature aberration in the meridional direction, and please refer to FIG. . The design of the second embodiment is similar to that of the first embodiment, except that the related parameters such as the refractive index of the lens, the radius of curvature of the lens, the thickness of the lens, the aspheric coefficient of the lens or the back focal length are different. In addition, in this embodiment, the optical axis area 46 of the image side surface 42 of the fourth lens 40 is convex and the circumferential area 47 thereof is convex, the fifth lens 50 has a positive refractive index, and the light of the image side 52 of the fifth lens 50 is convex. The axial region 56 is convex and its circumferential region 57 is convex, the sixth lens 60 has a positive refractive index, the optical axis region 63 of the object side 61 of the sixth lens 60 is convex and its circumferential region 64 is convex, the sixth lens 60 The optical axis region 66 of the image side 62 is convex and its circumferential region 67 is convex, the seventh lens 70 has a negative refractive index, the optical axis region 73 of the object side 71 of the seventh lens 70 is concave and its circumferential region 74 is Concave surface, the eighth lens 80 has a negative refractive index, the optical axis area 83 of the object side 81 of the eighth lens 80 is concave and its circumferential area 84 is concave, and the optical axis area 86 of the image side 82 of the eighth lens 80 is concave And its circumferential area 87 is concave.

The detailed optical data of the second embodiment is shown in FIG. 20 , and the aspheric surface data is shown in FIG. 21 . The optical design of this embodiment has good thermal stability. The normal temperature of 20°C is set as a benchmark. At this temperature, the focal length offset is 0.000 mm, and when the temperature is raised to 80°C, the back focal length offset is -0.004. mm, while cooling down to -40°C, the back focus offset is 0.003 mm. In this embodiment, EFL=1.577 mm; HFOV=110.000 degrees; TTL=32.525 mm; Fno=2.400; ImgH=2.882 mm. In particular: 1. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment; 2. The field curvature aberration in the meridian direction of this embodiment is smaller than that of the first embodiment Field curvature aberration; 3. The distortion aberration of this embodiment is smaller than that of the first embodiment.

Third Embodiment

Please refer to FIG. 10 , which illustrates a third embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 11A for the longitudinal spherical aberration on the imaging plane 91 of the third embodiment, please refer to FIG. 11B for the field curvature aberration in the sagittal direction, please refer to FIG. 11C for the field curvature aberration in the meridional direction, and please refer to FIG. . The design of the third embodiment is similar to that of the first embodiment, except that the related parameters such as the refractive index of the lens, the radius of curvature of the lens, the thickness of the lens, the aspheric coefficient of the lens or the back focal length are different. In addition, in this embodiment, the third lens 30 has a negative refractive index.

The detailed optical data of the third embodiment is shown in FIG. 22 , and the aspheric surface data is shown in FIG. 23 . The optical design of this embodiment has good thermal stability. The normal temperature of 20°C is set as a benchmark. At this temperature, the focal length offset is 0.000 mm, and when the temperature is raised to 80°C, the back focal length offset is -0.008 mm, while cooling down to -40°C, the back focus offset is 0.008 mm. In this embodiment, EFL=1.583 mm; HFOV=110.180 degrees; TTL=28.974 mm; Fno=2.000; ImgH=2.890 mm. In particular: 1. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment; 2. The field curvature aberration in the meridian direction of this embodiment is smaller than that of the first embodiment Field curvature aberration; 3. The distortion aberration of this embodiment is smaller than that of the first embodiment.

Fourth Embodiment

Please refer to FIG. 12, which illustrates the fourth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 91 of the fourth embodiment, please refer to FIG. 13A , the field curvature aberration in the sagittal direction please refer to FIG. 13B , the field curvature aberration in the meridional direction please refer to FIG. 13C , and the distortion aberration please refer to FIG. 13D . The design of the fourth embodiment is similar to that of the first embodiment, except that the related parameters such as the refractive index of the lens, the radius of curvature of the lens, the thickness of the lens, the aspheric coefficient of the lens or the back focal length are different. In addition, in this embodiment, the peripheral area 44 of the object side surface 41 of the fourth lens 40 is concave, the optical axis area 46 of the image side 42 of the fourth lens 40 is convex and the peripheral area 47 thereof is convex, and the fifth lens 50 has Positive refractive power, the optical axis area 56 of the image side 52 of the fifth lens 50 is convex and its circumferential area 57 is convex, the sixth lens 60 has a positive refractive power, the optical axis area of the object side 61 of the sixth lens 60 63 is convex and its circumferential area 64 is convex, the optical axis area 66 of the image side 62 of the sixth lens 60 is convex and its circumferential area 67 is convex, and the optical axis area 76 of the image side 72 of the seventh lens 70 is concave and Its circumferential area 77 is concave, the eighth lens 80 has a negative refractive index, the optical axis area 83 of the object side 81 of the eighth lens 80 is concave, and its circumferential area 84 is concave, and the light of the image side 82 of the eighth lens 80 is concave. The shaft region 86 is concave and its circumferential region 87 is concave.

The detailed optical data of the fourth embodiment is shown in FIG. 24 , and the aspheric surface data is shown in FIG. 25 . The optical design of this embodiment has good thermal stability. The normal temperature of 20°C is set as a benchmark. At this temperature, the focal length offset is 0.000 mm, and when the temperature is raised to 80°C, the back focal length offset is -0.011 mm, while cooling down to -40°C, the back focus offset is 0.011 mm. In this embodiment, EFL=1.718 mm; HFOV=110.000 degrees; TTL=27.499 mm; Fno=2.200; ImgH=2.874 mm. In particular: 1. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment; 2. The field curvature aberration in the meridian direction of this embodiment is smaller than that of the first embodiment Field curvature aberration; 3. The distortion aberration of this embodiment is smaller than that of the first embodiment.

Fifth Embodiment

Please refer to FIG. 14 , which illustrates a fifth embodiment of the optical imaging lens 1 of the present invention. For the longitudinal spherical aberration on the imaging plane 91 of the fifth embodiment, please refer to FIG. 15A , the field curvature aberration in the sagittal direction please refer to FIG. 15B , the field curvature aberration in the meridional direction please refer to FIG. 15C , and the distortion aberration please refer to FIG. 15D . The difference between the fifth embodiment and the first embodiment is that the design of the fifth embodiment consists of seven lenses, and the refractive index of the lens, the radius of curvature of the lens, the thickness of the lens, the aspheric coefficient of the lens or the back focal length, etc. The relevant parameters are different.

The first lens 10 is the first lens counted from the object side A1 to the image side A2. The first lens 10 has a negative refractive power. The optical axis region 13 of the object side 11 of the first lens 10 is convex and its circumferential region 14 is convex, and the optical axis region 16 of the image side 12 of the first lens 10 is concave and its circumferential region 17 is concave. The object side surface 11 and the image side surface 12 of the first lens 10 may be spherical, but not limited thereto.

The second lens 20 is the second lens counted from the object side A1 to the image side A2. The second lens 20 has a negative refractive power. The optical axis region 23 of the object side 21 of the second lens 20 is convex and its circumferential region 24 is convex, and the optical axis region 26 of the image side 22 of the second lens 20 is concave and its circumferential region 27 is concave. The object side surface 21 and the image side surface 22 of the second lens 20 may be spherical, but not limited thereto.

The third lens 30 is the third lens counted from the object side A1 to the image side A2. The third lens 30 has a positive refractive index, the optical axis region 33 of the object side surface 31 of the third lens 30 is concave and the circumferential region 34 thereof is concave, the optical axis region 36 of the image side surface 32 of the third lens 30 is convex and its peripheral region 34 is concave. The circumferential area 37 is convex. The object side surface 31 and the image side surface 32 of the third lens 30 may be aspherical, but not limited thereto.

The fourth lens 40 is the fourth lens counted from the object side A1 to the image side A2. The fourth lens 40 has a positive refractive index, the optical axis area 43 of the object side surface 41 of the fourth lens 40 is convex and the circumferential area 44 thereof is convex, and the optical axis area 46 of the image side 42 of the fourth lens 40 is convex and its peripheral area 44 is convex. The circumferential area 47 is convex. The object side surface 41 and the image side surface 42 of the fourth lens 40 may be spherical, but not limited thereto.

The fifth lens 50 is the fifth lens counted from the object side A1 to the image side A2. The fifth lens 50 has a negative refractive power, the optical axis region 53 of the object side 51 of the fifth lens 50 is convex and the circumferential region 54 thereof is convex, and the optical axis region 56 of the image side 52 of the fifth lens 50 is concave and its peripheral region 54 is convex. The circumferential area 57 is concave. The object side surface 51 and the image side surface 52 of the fifth lens 50 may be spherical, but not limited thereto.

The sixth lens 60 is the second lens counted from the image side A2 to the object side A1. The sixth lens 60 has a positive refractive index, the optical axis region 63 of the object side surface 61 of the sixth lens 60 is convex and the circumferential region 64 thereof is convex, and the optical axis region 66 of the image side 62 of the sixth lens 60 is convex and its peripheral region 64 is convex. The circumferential area 67 is convex. The object side surface 61 and the image side surface 62 of the sixth lens 60 may be spherical, but not limited thereto.

The seventh lens 70 is the first lens counted from the image side A2 to the object side A1. The seventh lens 70 has a positive refractive index, the optical axis region 73 of the object side surface 71 of the seventh lens 70 is convex and the circumferential region 74 thereof is concave, and the optical axis region 76 of the image side 72 of the seventh lens 70 is convex and its peripheral region 74 is convex. The circumferential area 77 is convex. The object side surface 71 and the image side surface 72 of the seventh lens 70 may be aspherical, but not limited thereto.

The detailed optical data of the fifth embodiment is shown in FIG. 26 , and the aspherical surface data is shown in FIG. 27 . The optical design of this embodiment has good thermal stability. The normal temperature of 20°C is set as a benchmark. At this temperature, the focal length offset is 0.000 mm, and when the temperature is raised to 80°C, the back focal length offset is -0.011 mm, while cooling down to -40°C, the back focus offset is 0.008 mm. In this embodiment, EFL=1.558 mm; HFOV=108.460 degrees; TTL=33.686 mm; Fno=2.000; ImgH=2.890 mm. In particular: 1. The field curvature aberration in the sagittal direction of this embodiment is smaller than the field curvature aberration in the sagittal direction of the first embodiment; 2. The field curvature aberration in the meridian direction of this embodiment is smaller than that of the first embodiment Field curvature aberration; 3. The distortion aberration of this embodiment is smaller than that of the first embodiment.

Sixth Embodiment

Please refer to FIG. 16 , which illustrates the sixth embodiment of the optical imaging lens 1 of the present invention. The sixth embodiment consists of seven lenses. For the longitudinal spherical aberration on the imaging plane 91, please refer to FIG. 17A, for the field curvature aberration in the sagittal direction, please refer to FIG. 17B, for the field curvature aberration in the meridional direction, please refer to FIG. Please refer to Figure 17D for aberrations. The design of the sixth embodiment is similar to that of the fifth embodiment, except that the related parameters such as the refractive index of the lens, the radius of curvature of the lens, the thickness of the lens, the aspheric coefficient of the lens or the back focal length are different. In addition, in this embodiment, the optical axis region 43 of the object side surface 41 of the fourth lens 40 is a plane and the circumferential region 44 thereof is a plane, and the optical axis region 73 of the object side surface 71 of the seventh lens 70 is a concave surface.

The detailed optical data of the sixth embodiment is shown in FIG. 28 , and the aspheric surface data is shown in FIG. 29 . The optical design of this embodiment has good thermal stability. The normal temperature of 20°C is set as a benchmark. At this temperature, the focal length offset is 0.000 mm, and when the temperature is raised to 80°C, the back focal length offset is -0.005 mm, while cooling down to -40°C, the back focus offset is 0.005 mm. In this embodiment, EFL=1.812 mm; HFOV=110.050 degrees; TTL=32.690 mm; Fno=2.400; ImgH=2.890 mm. In particular: 1. The longitudinal spherical aberration of this embodiment is smaller than that of the fifth embodiment.

The lenses of the above six embodiments are all selected from glass materials that meet |dn/dt| Among them, dn/dt represents the temperature coefficient of refractive index, which refers to the refractive index change caused by unit temperature, that is, the change value of the refractive index when the temperature increases by 1°C.

In addition, the important parameters of each embodiment are arranged in FIG. 30 and FIG. 31 respectively.

1. Various embodiments of the present invention provide an optical imaging lens with a large angle of view and good imaging quality. Through the concave and convex of the lens surface and the matching design of the refractive power of the lens, for example: the first lens has a negative refractive power, the second lens has a negative refractive power, the optical axis area of the object side of the third lens is concave, and the fourth lens has a negative refractive power. The optical axis region of the object side of the lens is convex and the optical axis region of the object side of the fifth lens is convex, which can achieve the purpose of correcting spherical aberration and aberration of the optical system and reducing distortion. When the optical imaging lens also conforms to (G23+T3+T4+G45)/L57≧2.700, the length of the optical imaging lens system can be effectively shortened. And when the optical imaging lens also complies with υ1+υ2≦80.000, the chromatic aberration can be effectively improved, and the preferred range is 40.000≦υ1+υ2≦80.000.

2. Each embodiment of the present invention provides an optical imaging lens with a large field of view and good imaging quality, through the concave and convex of the lens surface and the matching design of the refractive index of the lens, for example: the first lens has a negative refractive index, The second lens has a negative refractive index and the optical axis area of the object side of the third lens is concave, and the optical axis area of the object side of the fifth lens is convex or the circumference area of the object side of the fifth lens is convex. The purpose of correcting optical system spherical aberration, aberration and reducing distortion. When the optical imaging lens also conforms to (T3+T7)/(G34+T5)≧3.200, the length of the optical imaging lens system can be effectively shortened. The best range is 3.200≦(T3+T7)/(G34+T5)≦6.000 And when the optical imaging lens also complies with υ1+υ2≦80.000, the chromatic aberration can be effectively improved, and the preferred range is 40.000≦υ1+υ2≦80.000.

3. At least one lens in each embodiment of the present invention is made of glass, and the wavelength of 470 nm to 950 nm is selected and the measurement temperature range is -40°C to 80°C, satisfying |dn/dt| ≦11.000×10 ^-6 /°C glass material to achieve the effect of good thermal stability. dn/dt stands for the temperature coefficient of refractive index, which refers to the change in refractive index caused by unit temperature, that is, the change in refractive index when the temperature increases by 1°C.

4. Each embodiment of the present invention satisfies HFOV/(TL+EFL)≧3.000°/mm, which can effectively expand the field of view and shorten the length of the optical imaging lens system. The preferred range is 3.000°/mm≦HFOV/(TL+ EFL)≦4.500°/mm.

5. The number of lenses of the optical imaging lens of the present invention is seven or eight, which can achieve the best effect of modifying the imaging quality.

6. In the optical imaging lens of the present invention, if the optical axis region of the object side of the fourth lens is designed as a plane or the circumferential region of the fourth lens is designed as a plane, the difference in thickness between the edge and the center of the lens can be reduced, and the manufacturing yield can be improved.

7. In order to shorten the length of the optical imaging lens system and ensure the imaging quality, reducing the air gap between the lenses or appropriately shortening the thickness of the lenses is one of the means in this case, but at the same time, the difficulty of production is considered, so the implementation of the present invention The example satisfies the numerical limitation of the following conditional expression, and can have a better configuration.

1) (G12+G23)/EFL≧3.400, the best range is 3.400≦(G12+G23)/EFL≦7.400;

2) ALT/(T3+G45)≦2.700, the best range is 1.300≦ALT/(T3+G45)≦2.700;

3) AAG/(G12+T3)≦2.200, the best range is 1.200≦AAG/(G12+T3)≦2.200;

4) (T1+T5)/T2≦2.800, the best range is 1.000≦(T1+T5)/T2≦2.800;

5) (T7+BFL)/T4≦3.600, the best range is 1.500≦(T7+BFL)/T4≦3.600;

6) G45/T2≧1.900, the best range is 1.900≦G45/T2≦5.300;

7) T3/(T2+G34)≧2.000, the best range is 2.000≦T3/(T2+G34)≦4.300;

8) TTL/(G12+G23+G45)≦3.500, the best range is 2.000≦TTL/(G12+G23+G45)≦3.500;

9) (G23+T4)/T2≧4.000, the best range is 4.000≦(G23+T4)/T2≦9.600;

10) ALT/(T3+G67)≦4.800, the best range is 2.200≦ALT/(T3+G67)≦4.800;

11) BFL/EFL≧1.400, the best range is 1.400≦BFL/EFL≦2.800;

12) TL/(T2+T3+T4)≦4.500, the best range is 2.500≦TL/(T2+T3+T4)≦4.500;

13) (T1+G56)/T6≦5.500, the best range is 0.400≦(T1+G56)/T6≦5.500;

14) (T4+G45)/EFL≧2.100, the best range is 2.100≦(T4+G45)/EFL≦4.000;

15) (G23+BFL)/(G34+T4)≧2.500, the best range is 2.500≦(G23+BFL)/(G34+T4)≦4.800.

In addition, any combination of the parameters of the embodiment can be selected to increase the lens limit, so as to facilitate the lens design of the same structure of the present invention.

In view of the unpredictability of optical system design, under the framework of the present invention, meeting the above conditional expressions can preferably shorten the length of the system of the present invention, increase the aperture, improve thermal stability, improve imaging quality, or improve assembly yield Improve and improve the shortcomings of the previous technology.

The above-mentioned exemplary limiting relational expressions can also be optionally combined with unequal quantities and applied to the embodiments of the present invention, but are not limited thereto. In the implementation of the present invention, in addition to the aforementioned relationship, detailed structures such as the arrangement of concave-convex curved surfaces of other lenses can be additionally designed for a single lens or broadly for multiple lenses, so as to enhance the system performance and/or Resolution control. It should be noted that these details may be selectively incorporated into other embodiments of the present invention without conflict.

The combination ratio relationship of the optical parameters disclosed in the various embodiments of the present invention can be implemented according to the obtained numerical range including the maximum and minimum values. The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

1: Optical imaging lens 11, 21, 31, 41, 51, 61, 71, 81, 110, 410, 510: Object side 12, 22, 32, 42, 52, 62, 72, 82, 120, 320: like the side 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, 73, 76, 83, 86, Z1: Optical axis area 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77, 84, 87, Z2: Circumferential area 10: The first lens 20: Second lens 30: Third lens 40: Fourth lens 50: Fifth lens 60: Sixth lens 70: Seventh lens 80: Eighth lens 90: Filter 91: Imaging surface 99: Aperture 100, 200, 300, 400, 500 : Lens 130: Assembly Department 211, 212: Parallel rays A1: Object side A2: Image side CP: center point CP1: First center point CP2: Second center point TP1: First transition point TP2: Second transition point OB: Optical Boundary I: Optical axis Lc: chief ray Lm: marginal ray EL: extension cord Z3: Relay zone M, R: intersection point T1, T2, T3, T4, T5, T6, T7, T8: the thickness of each lens on the optical axis

1 to 5 are schematic diagrams illustrating a method for determining the curvature shape of an optical imaging lens according to the present invention. FIG. 6 is a schematic diagram illustrating a first embodiment of the optical imaging lens of the present invention. FIG. 7A shows the longitudinal spherical aberration on the imaging plane of the first embodiment. FIG. 7B shows the curvature of field aberration in the sagittal direction of the first embodiment. FIG. 7C shows the curvature of field aberration in the meridional direction of the first embodiment. FIG. 7D shows the distortion aberration of the first embodiment. FIG. 8 is a schematic diagram illustrating a second embodiment of the optical imaging lens of the present invention. FIG. 9A shows the longitudinal spherical aberration on the imaging plane of the second embodiment. FIG. 9B shows the field curvature aberration in the sagittal direction of the second embodiment. FIG. 9C shows the curvature of field aberration in the meridional direction of the second embodiment. FIG. 9D shows the distortion aberration of the second embodiment. FIG. 10 is a schematic diagram of a third embodiment of the optical imaging lens of the present invention. FIG. 11A shows longitudinal spherical aberration on the imaging plane of the third embodiment. FIG. 11B shows the curvature of field aberration in the sagittal direction of the third embodiment. FIG. 11C shows the curvature of field aberration in the meridional direction of the third embodiment. FIG. 11D shows the distortion aberration of the third embodiment. FIG. 12 is a schematic diagram of a fourth embodiment of the optical imaging lens of the present invention. FIG. 13A shows the longitudinal spherical aberration on the imaging plane of the fourth embodiment. FIG. 13B shows the curvature of field aberration in the sagittal direction of the fourth embodiment. FIG. 13C shows the curvature of field aberration in the meridional direction of the fourth embodiment. FIG. 13D shows the distortion aberration of the fourth embodiment. FIG. 14 is a schematic diagram illustrating a fifth embodiment of the optical imaging lens of the present invention. FIG. 15A shows the longitudinal spherical aberration on the imaging plane of the fifth embodiment. FIG. 15B shows the curvature of field aberration in the sagittal direction of the fifth embodiment. FIG. 15C shows the curvature of field aberration in the meridional direction of the fifth embodiment. FIG. 15D shows the distortion aberration of the fifth embodiment. FIG. 16 is a schematic diagram of a sixth embodiment of the optical imaging lens of the present invention. FIG. 17A shows the longitudinal spherical aberration on the imaging plane of the sixth embodiment. FIG. 17B shows the field curvature aberration in the sagittal direction of the sixth embodiment. FIG. 17C shows the curvature of field aberration in the meridional direction of the sixth embodiment. FIG. 17D shows the distortion aberration of the sixth embodiment. Fig. 18 shows detailed optical data of the first embodiment. Fig. 19 shows detailed aspherical surface data of the first embodiment. Fig. 20 shows detailed optical data of the second embodiment. Fig. 21 shows detailed aspheric surface data of the second embodiment. Fig. 22 shows detailed optical data of the third embodiment. FIG. 23 shows detailed aspheric surface data of the third embodiment. Fig. 24 shows detailed optical data of the fourth embodiment. Fig. 25 shows detailed aspherical surface data of the fourth embodiment. Fig. 26 shows detailed optical data of the fifth embodiment. Fig. 27 shows detailed aspherical surface data of the fifth embodiment. Fig. 28 shows the detailed optical data of the sixth embodiment. Fig. 29 shows detailed aspheric surface data of the sixth embodiment. FIG. 30 shows important parameters of each embodiment. Fig. 31 shows important parameters of each embodiment.

1: Optical imaging lens

A1: Object side

A2: Image side

I: Optical axis

11, 21, 31, 41, 51, 61, 71, 81: Object side

12, 22, 32, 42, 52, 62, 72, 82: like the side

13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, 73, 76, 83, 86: Optical axis area

14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77, 84, 87: Circumferential area

10: The first lens

20: Second lens

30: Third lens

40: Fourth lens

50: Fifth lens

60: Sixth lens

70: Seventh lens

80: Eighth lens

90: Filter

91: Imaging surface

99: Aperture

T1, T2, T3, T4, T5, T6, T7, T8: the thickness of each lens on the optical axis

Claims (20)

An optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens has an object side facing the object side and allowing the imaging light to pass, and an image side facing the image side and allowing the imaging light to pass, wherein, the first lens is the first lens counted from the object side to the image side and the first lens has a negative refractive index; the second lens is the second lens counted from the object side to the image side and the second lens has a negative refractive index; The third lens is the third lens counted from the object side to the image side, and an optical axis region of the object side of the third lens is concave; The fourth lens is the fourth lens counted from the object side to the image side, and an optical axis region of the object side of the fourth lens is convex; The fifth lens is the fifth lens counted from the object side to the image side, and an optical axis region of the object side of the fifth lens is convex; The sixth lens is the second lens counted from the image side to the object side; and The seventh lens is the first lens counted from the image side to the object side; υ1 is the Abbe number of the first lens, υ2 is the Abbe number of the second lens, T3 is the thickness of the third lens on the optical axis, T4 is the thickness of the fourth lens on the optical axis, G23 is the distance from the image side of the second lens to the object side of the third lens on the optical axis, G45 is the distance from the image side of the fourth lens to the object side of the fifth lens on the optical axis The distance above, L57 is the distance from the object side of the fifth lens to the object side of the seventh lens on the optical axis, and the optical imaging lens conforms to (G23+T3+T4+G45)/L57≧2.700 and υ1+υ2≦80.000. The optical imaging lens of claim 1, wherein ALT is the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the seventh lens in the light The sum of the lens thicknesses on the axis, and the optical imaging lens complies with ALT/(T3+G45)≦2.700. The optical imaging lens of claim 1, wherein BFL is the distance from the image side of the seventh lens to an imaging surface on the optical axis, T7 is the thickness of the seventh lens on the optical axis, and the optical The imaging lens conforms to (T7+BFL)/T4≦3.600. The optical imaging lens of claim 1, wherein T2 is the thickness of the second lens on the optical axis, and the optical imaging lens complies with (G23+T4)/T2≧4.000. The optical imaging lens of claim 1, wherein TL is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, and T2 is the distance on the optical axis of the second lens thickness, and the optical imaging lens conforms to TL/(T2+T3+T4)≦4.500. The optical imaging lens of claim 1, wherein EFL is the effective focal length of the optical imaging lens, and the optical imaging lens complies with (T4+G45)/EFL≧2.100. The optical imaging lens of claim 1, wherein TTL is the distance from the object side of the first lens to an imaging plane on the optical axis, and G12 is the distance from the image side of the first lens to the second lens. The distance from the side of the object on the optical axis, and the optical imaging lens complies with TTL/(G12+G23+G45)≦3.500. The optical imaging lens of claim 1, wherein BFL is the distance from the image side of the seventh lens to an imaging plane on the optical axis, and G34 is the distance from the image side of the third lens to the fourth lens The distance from the side of the object on the optical axis, and the optical imaging lens complies with (G23+BFL)/(G34+T4)≧2.500. An optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens has an object side facing the object side and allowing the imaging light to pass, and an image side facing the image side and allowing the imaging light to pass, wherein, the first lens is the first lens counted from the object side to the image side and the first lens has a negative refractive index; the second lens is the second lens counted from the object side to the image side and the second lens has a negative refractive index; The third lens is the third lens counted from the object side to the image side, and an optical axis region of the object side of the third lens is concave; The fourth lens is the fourth lens counted from the object side to the image side; The fifth lens is the fifth lens counted from the object side to the image side, and an optical axis region of the object side of the fifth lens is convex; The sixth lens is the second lens counted from the image side to the object side; The seventh lens is the first lens counted from the image side to the object side; υ1 is the Abbe number of the first lens, υ2 is the Abbe number of the second lens, T3 is the thickness of the third lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T7 is the thickness of the seventh lens on the optical axis, G34 is the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, and the optical imaging lens conforms to (T3+ T7)/(G34+T5)≧3.200 and υ1+υ2≦80.000. An optical imaging lens includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, each lens has an object side facing the object side and allowing the imaging light to pass, and an image side facing the image side and allowing the imaging light to pass, wherein, the first lens is the first lens counted from the object side to the image side and the first lens has a negative refractive index; the second lens is the second lens counted from the object side to the image side and the second lens has a negative refractive index; The third lens is the third lens counted from the object side to the image side, and an optical axis region of the object side of the third lens is concave; The fourth lens is the fourth lens counted from the object side to the image side; The fifth lens is the fifth lens counted from the object side to the image side, and a circumferential area of the object side of the fifth lens is convex; The sixth lens is the second lens counted from the image side to the object side; The seventh lens is the first lens counted from the image side to the object side; υ1 is the Abbe number of the first lens, υ2 is the Abbe number of the second lens, T3 is the thickness of the third lens on the optical axis, T5 is the thickness of the fifth lens on the optical axis, T7 is the thickness of the seventh lens on the optical axis, G34 is the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, and the optical imaging lens conforms to (T3+ T7)/(G34+T5)≧3.200 and υ1+υ2≦80.000. The optical imaging lens of any one of claim 9 and claim 10, wherein HFOV is the half angle of view of the optical imaging lens, TL is the object side of the first lens to the image side of the seventh lens in the light The distance on the axis and EFL are the effective focal length of the optical imaging lens, and the optical imaging lens conforms to HFOV/(TL+EFL)≧3.000°/mm. The optical imaging lens of any one of claim 9 and claim 10, wherein AAG is the distance on the optical axis from the image side of the first lens to the object side of the second lens, the The distance from the image side to the object side of the third lens on the optical axis, the distance from the image side of the third lens to the object side of the fourth lens on the optical axis, the The distance from the image side to the object side of the fifth lens on the optical axis, the distance from the image side of the fifth lens to the object side of the sixth lens on the optical axis, and the distance on the optical axis of the sixth lens The sum of the distances from the image side to the object side of the seventh lens on the optical axis, G12 is the distance from the image side of the first lens to the object side of the second lens on the optical axis, and the The optical imaging lens conforms to AAG/(G12+T3)≦2.200. The optical imaging lens of any one of claim 9 and claim 10, wherein ALT is the first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens and the The sum of the lens thicknesses of the seventh lens on the optical axis, G67 is the distance from the image side of the sixth lens to the object side of the seventh lens on the optical axis, and the optical imaging lens complies with ALT/(T3 +G67)≦4.800. The optical imaging lens of any one of claim 9 and claim 10, wherein BFL is the distance from the image side surface of the seventh lens to an imaging surface on the optical axis, EFL is the effective focal length of the optical imaging lens, and This optical imaging lens complies with BFL/EFL≧1.400. The optical imaging lens of any one of claim 9 and claim 10, wherein T1 is the thickness of the first lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, and G56 is the fifth The distance from the image side of the lens to the object side of the sixth lens on the optical axis, and the optical imaging lens satisfies (T1+G56)/T6≦5.500. The optical imaging lens of any one of claim 9 and claim 10, wherein when the wavelength of 470 nm to 950 nm and the measurement temperature range are -40°C to 80°C, the first lens to the first lens The material of the seven lenses complies with |dn/dt|≦11.000×10 ^-6 /°C. The optical imaging lens according to any one of claim 9 and claim 10, wherein T1 is the thickness of the first lens on the optical axis, T2 is the thickness of the second lens on the optical axis, and the optical imaging lens The lens conforms to (T1+T5)/T2≦2.800. The optical imaging lens according to any one of claim 9 and claim 10, wherein G45 is the distance on the optical axis from the image side of the fourth lens to the object side of the fifth lens, and T2 is the second The thickness of the lens on the optical axis, and the optical imaging lens conforms to G45/T2≧1.900. The optical imaging lens according to any one of claim 9 and claim 10, wherein T2 is the thickness of the second lens on the optical axis, and the optical imaging lens complies with T3/(T2+G34)≧2.000. The optical imaging lens of any one of claim 9 and claim 10, wherein EFL is the effective focal length of the optical imaging lens, G12 is the image side of the first lens to the object side of the second lens in the light The distance on the axis, G23 is the distance from the image side of the second lens to the object side of the third lens on the optical axis, and the optical imaging lens complies with (G12+G23)/EFL≧3.400.

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