TWI715502B - Optical imaging lens - Google Patents

Abstract

An optical imaging lens includes a first lens element, a second lens, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element and a seventh lens element from an object side to an image side in order along an optical axis, and each lens element has an object-side surface and an image-side surface. The first lens element has negative refracting power, an optical axis region of the object-side surface of the second lens element is concave, and a periphery region of the image-side surface of the fifth lens element is concave. The lens elements included by the optical imaging lens are only the seven lens elements described above. The optical imaging lens satisfies the following conditions: EFL/ImgH≥1.100, wherein EFL is an effective focal length of the optical imaging lens, ImgH is the image height of the optical imaging lens.

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 shooting images and video recording, such as mobile phones, cameras, tablets, and personal digital assistants (Personal Digital Assistant, PDA), automotive Optical imaging lenses for portable electronic devices such as photography devices.

The specifications of portable electronic products are changing with each passing day, and the key components, that is, optical imaging lenses, are also developing more diversified. The application fields of automotive lenses continue to increase. Optical imaging lenses will be used from reversing imaging, 360-degree panoramic views, lane shifting systems to advanced driver assistance systems (ADAS), etc. The number of lenses used in a car may vary from 6 to 20, and the lens specifications continue to improve, from VGA (300,000) to over one million pixels. However, there is still much room for improvement in the imaging quality of car lenses compared with the imaging quality of tens of millions of pixels in mobile phone lenses.

Therefore, the various embodiments of the present invention provide a seven-piece optical imaging lens with a small aperture value, a large image height, and a high resolution, good optical performance, and technically feasible. The seven-element optical imaging lens of the present invention has a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens sequentially arranged on the optical axis from the object side to the image side . The first lens, the second lens, the third lens, the fourth lens, the fifth lens, the sixth lens, and the seventh lens respectively have an object side surface facing the object side and allowing imaging light to pass, and facing the image side and imaging The side of the image through which the light passes.

In an embodiment of the present invention, the first lens has negative refractive power, an optical axis area of the object side of the second lens is concave, and a circumferential area of the image side of the fifth lens is concave, The lens of the optical imaging lens is composed of the above seven lenses and meets the following conditional formula: EFL/ImgH≧1.100, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens.

In another embodiment of the present invention, the first lens has negative refractive power, the second lens has negative refractive power, the fifth lens has negative refractive power, and the seventh lens has positive refractive power, The lens of the optical imaging lens is composed of the above seven lenses and meets the following conditional formula: EFL/ImgH≧1.100, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens.

In another embodiment of the present invention, the first lens has negative refractive power, and a circumferential area of the image side surface thereof is concave, the fifth lens has negative refractive power, and the seventh lens has positive refractive power. The lens of the optical imaging lens is composed of the above seven lenses and meets the following conditional formula: EFL/ImgH≧1.100, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image of the optical imaging lens high.

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

1. ALT*Fno/EFL≦10.600;

2. Tmax*Fno/EFL≦4.500;

3. TTL/EFL≦8.000;

4. (AAG+BFL)/Tavg≦4.700;

5. HFOV/ImgH≦10.000 degrees/mm;

6. HFOV/AAG≦6.100 degrees/mm;

7. HFOV/BFL≦15.000 degrees/mm;

8. (T4+G45)/T3≦2.500;

9. (T4+G45+T5+G56)/T2≦1.600;

10. (G34+G45+G56+G67)/G12≦2.000;

11. (G23+G34+G45+G67)/T2≦1.300;

12. (G23+G45+G56+G67)/T3≦2.900;

13. (G23+G34+G45+G56)/T6≦6.000;

14. (T4+T5+T7)/(T1+G12)≦3.700;

15. (T4+T5+T7)/(T2+G23)≦2.100;

16. (T4+T5+T7)/(T6+G67)≦10.000; and

17. ALT/AAG≦5.200.

Among them, T1 is defined as the thickness of the first lens on the optical axis; T2 is defined as the thickness of the second lens on the optical axis; T3 is defined as the thickness of the third lens on the optical axis; T4 is defined as the fourth lens on the optical axis T5 is defined as the thickness of the fifth lens on the optical axis; T6 is defined as the thickness of the sixth lens on the optical axis; T7 is defined as the thickness of the seventh lens on the optical axis; G12 is defined as the thickness of the first lens to The air gap of the second lens on the optical axis; G23 is defined as the air gap between the second lens and the third lens on the optical axis; G34 is defined as the air gap between the third lens and the fourth lens on the optical axis; G45 is defined as The air gap between the fourth lens and the fifth lens on the optical axis; G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis; G67 is defined as the air gap between the sixth lens and the seventh lens on the optical axis ALT is defined as the total thickness of the seven lenses on the optical axis from the first lens to the seventh lens; TL is defined as the distance from the object side of the first lens to the image side of the seventh lens on the optical axis; TTL is defined as the first lens The distance from the object side of a lens to the imaging surface on the optical axis; BFL is defined as the distance from the image side of the seventh lens to the imaging surface on the optical axis; AAG is defined as the distance from the first lens to the seventh lens on the optical axis The sum of air gaps; EFL is defined as the effective focal length of the optical imaging lens; ImgH is defined as the image height of the optical imaging lens.

In addition, υ1 is the Abbe coefficient of the first lens 10; υ2 is the Abbe coefficient of the second lens 20; υ3 is the Abbe coefficient of the third lens 30; υ4 is the Abbe coefficient of the fourth lens 40; υ5 is the fifth lens The Abbe coefficient of the lens 50; υ6 is the Abbe coefficient of the sixth lens 60; υ7 is the Abbe coefficient of the seventh lens 70.

In the present invention, Tmax is the thickest lens thickness of the first lens to the seventh lens on the optical axis, that is, the maximum value of T1, T2, T3, T4, T5, T6, and T7; Tavg is the first lens to the first lens. The average lens thickness of the seven lenses on the optical axis, namely (T1+T2+T3+T4+T5+T6+T7)/7.

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 interpreted based on the definitions listed in this specification.

The optical system in this specification includes at least one lens, which receives the imaging light from the incident optical system parallel to the optical axis to a half angle of view (HFOV) angle relative to the optical axis. The imaging light passes through the optical system to form images on the imaging surface. The phrase "a lens has positive refractive power (or negative refractive power)" means that the paraxial refractive power calculated by the lens according to Gaussian optics theory is positive (or negative). The so-called "object side (or image side) of the lens" is defined as the specific range of the imaging light passing through the lens surface. Imaging light includes at least two types of light: 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 one or more relay areas in some embodiments. The description of these areas will be detailed below Elaborate.

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

The range from the center point to the first conversion point TP1 is defined as the optical axis area, where the optical axis area includes the center point. The area from 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, it may further include a relay area between the optical axis area and the circumferential area, and the number of relay areas depends on the number of switching points.

When the light parallel to the optical axis I passes through an area, if the light is deflected toward the optical axis I and the intersection point with the optical axis I is on the lens image side A2, the area is convex. When the light parallel to the optical axis I passes through an area, if the intersection of the extension line of the light and the optical axis I is located at the lens object side A1, 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 of the optical system (not shown). The imaging light does not reach the assembling part 130. The structure and shape of the assembling part 130 are only examples for illustrating the present invention, and the scope of the present invention is not limited thereto. The lens assembly 130 discussed below may be partially or completely omitted in the drawings.

Referring to FIG. 2, the optical axis zone Z1 is defined between the center point CP and the first conversion 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 light ray 211 intersects the optical axis I on the image side A2 of the lens 200 after passing through the optical axis zone Z1, that is, the focal point of the parallel light ray 211 passing through the optical axis zone Z1 is located at the R point of the image side A2 of the lens 200. Since the light intersects the optical axis I at the image side A2 of the lens 200, the optical axis area Z1 is convex. On the contrary, the parallel light 212 diverges after passing through the circumferential zone Z2. As shown in FIG. 2, the extension line EL of the parallel light ray 212 after passing through the circumferential area Z2 intersects the optical axis I at the object side A1 of the lens 200, that is, the focal point of the parallel light 212 passing through the circumferential area Z2 is located at point M on the object side A1 of the lens 200 . Since the extension line EL of the light intersects the optical axis I 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 conversion point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface.

On the other hand, the unevenness of the optical axis area can be judged according to the judgment method of ordinary knowledge in the field, that is, the sign of the paraxial curvature radius (abbreviated as R value) is used to judge the optical axis area surface of the lens. Shaped bumps. The R value can be commonly used in optical design software, such as Zemax or CodeV. The R value is also commonly found in the lens data sheet of optical design software. For the object side, when the R value is positive, it is determined that the optical axis area of the object side is convex; when the R value is negative, it is determined that the optical axis area of the object side is concave. Conversely, for the image side, when the R value is positive, it is determined that the optical axis area of the image side is concave; when the R value is negative, it is determined that the optical axis area of the image side is convex. The result of this method is consistent with the result of the aforementioned method of judging by the intersection of the ray/ray extension line and the optical axis. The method of judging the intersection of the ray/ray extension line and the optical axis is that the focus of a ray parallel to the optical axis is located on the lens The object side or the image side to determine the surface unevenness. The "a region is convex (or concave)", "a region is convex (or concave)" or "a convex (or concave) region" described in this manual can be used interchangeably.

Figures 3 to 5 provide examples of determining 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 the lens 300. 3, the image side surface 320 of the lens 300 has only one transition point TP1 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 shown in FIG. 3. The R value of this image side surface 320 is positive (that is, R>0), and therefore, the optical axis area Z1 is a concave surface.

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

FIG. 4 is a radial cross-sectional view of the lens 400. Referring to FIG. 4, the object side 410 of the lens 400 has a first switching point TP1 and a second switching point TP2. The optical axis area 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 side surface 410 of the object is positive (that is, R>0), and therefore, the optical axis area Z1 is a convex surface.

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

FIG. 5 is a radial cross-sectional view of the 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 lens surface. The 50-100% of the distance between the boundaries OB is the circumferential 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 zone Z1 of the object side surface 510. The R value of the side surface 510 of the object is positive (that is, R>0), so the optical axis area 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 area Z2.

As shown in FIG. 6, the optical imaging lens 1 of the present invention, from the object side A1 where the object is placed (not shown) to the image side A2 where the image is formed, is mainly composed of seven lenses along the optical axis I. It includes an aperture 80, a first lens 10, a second lens 20, a third lens 30, a fourth lens 40, a fifth lens 50, a sixth lens 60, a seventh lens 70 and an image plane 92 in sequence. 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 and the seventh lens 70 can all be made of transparent glass material. However, the present invention is not limited to this. Each lens has an appropriate refractive power. In the optical imaging lens 1 of the present invention, there 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 in all lenses with refractive power. 70 these seven 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, the aperture stop 80 of the optical imaging lens 1 is set at an appropriate position. In FIG. 6, the aperture 80 is provided between the third lens 10 and the fourth lens 40. 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 sequentially pass through the first lens 10, the second lens 20, and the third lens. After the lens 30, the aperture 80, the fourth lens 40, the fifth lens 50, the sixth lens 60, the seventh lens 70 and the filter 90, they will focus on the imaging surface 92 of the image side A2 to form a clear image. In each embodiment of the present invention, the filter 90 and the protective glass 91 are provided between the seventh lens 70 and the imaging surface 92, which can be filters with various suitable functions, such as: infrared cut filter (infrared cut-off filter), which is used to prevent infrared rays in the imaging light from being transmitted to the imaging surface 92 and affecting the imaging quality.

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

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, first lens 10 has a first lens thickness T1, second lens 20 has a second lens thickness T2, third lens 30 has a third lens thickness T3, fourth lens 40 has a fourth lens thickness T4, and a fifth lens 50 It has a fifth lens thickness T5, the sixth lens 60 has a sixth lens thickness T6, and the seventh lens 70 has a seventh lens thickness T7. Therefore, the total thickness of each lens in the optical imaging lens 1 of the present invention on the optical axis I is called ALT. 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 located on the optical axis I between each lens. For example, the air gap from the first lens 10 to the second lens 20 is called G12, the air gap from the second lens 20 to the third lens 30 is called G23, and the air gap from the third lens 30 to the fourth lens 40 is called G34, The air gap between the fourth lens 40 and the fifth lens 50 is referred to as G45, the air gap between the fifth lens 50 and the sixth lens 60 is referred to as G56, and the air gap between the sixth lens 60 and the seventh lens 70 is referred to as G67. Therefore, the total of the six air gaps on the optical axis I from the first lens 10 to the seventh lens 70 is called AAG. That is, AAG = G12+G23+G34+G45+G56+G67.

In addition, the distance from the object side surface 11 of the first lens 10 to the imaging surface 92 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 surface 11 of the first lens 10 to the image side surface 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, ImgH (image height) is the image height of the optical imaging lens 1, Fno is the aperture value of the optical imaging lens 1, and BFL is the seventh lens The distance from the image side surface 72 of 70 to the image surface 92 on the optical axis I.

In addition, redefine: f1 is the focal length of the first lens 10; f2 is the focal length of the second lens 20; f3 is the focal length of the third lens 30; f4 is the focal length of the fourth lens 40; f5 is the focal length of the fifth lens 50; f6 is the focal length of the sixth lens 60; f7 is the focal length of the seventh lens 70; n1 is the refractive index of the first lens 10; n2 is the refractive index of the second lens 20; n3 is the refractive index of the third lens 30; n4 is The refractive index of the fourth lens 40; n5 is the refractive index of the fifth lens 50; n6 is the refractive index of the sixth lens 60; n7 is the refractive index of the seventh lens 70; υ1 is the Abbe number of the first lens 10; υ2 Is the Abbe coefficient of the second lens 20; υ3 is the Abbe coefficient of the third lens 30; υ4 is the Abbe coefficient of the fourth lens 40; υ5 is the Abbe coefficient of the fifth lens 50; υ6 is the Abbe coefficient of the sixth lens 60 Abbe coefficient; υ7 is the Abbe coefficient of the seventh lens 70.

Another definition in the present invention: Tmax is the thickest lens thickness of the first lens 10 to the seventh lens 70 on the optical axis, that is, the maximum value of T1, T2, T3, T4, T5, T6, and T7; Tavg is the first lens 10 to the average lens thickness of the seventh lens 70 on the optical axis, that is, (T1+T2+T3+T4+T5+T6+T7)/7.

First embodiment

Please refer to FIG. 6, which illustrates a first embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 7A for the longitudinal spherical aberration on the imaging surface 92 in the first embodiment, and refer to FIG. 7B for the field curvature aberration in the sagittal direction. Please refer to Fig. 7C for curvature aberration and Fig. 7D for distortion aberration. The Y-axis of each spherical aberration diagram in all embodiments represents the field of view, and the highest point is 1.0. The Y-axis of each aberration diagram and distortion diagram in the embodiments represents image height. The system image height of the first embodiment (Image Height , ImgH) is 5.140 mm.

The optical imaging lens 1 of the first embodiment is mainly composed of seven lenses with refractive power, an aperture 80, a filter 90, a protective glass 91 and an imaging surface 92. The aperture 80 of the first embodiment is arranged between the third lens 30 and the fourth lens 40.

The first lens 10 has a negative refractive power. The optical axis area 13 of the object side surface 11 of the first lens 10 is convex and the circumferential area 14 thereof is convex. The optical axis area 16 of the image side surface 12 of the first lens 10 is concave and the circumferential area 17 thereof is concave. Both the object side surface 11 and the image side surface 12 of the first lens 10 are spherical surfaces, but not limited thereto.

The second lens 20 has positive refractive power. The optical axis area 23 of the object side surface 21 of the second lens 20 is concave and the circumferential area 24 thereof is concave. The optical axis area 26 of the image side surface 22 of the second lens 20 is convex and the circumferential area 27 thereof is convex. The object side surface 21 and the image side surface 22 of the second lens 20 are both spherical, but not limited to this.

The third lens 30 has a negative refractive power. The optical axis area 33 of the object side surface 31 of the third lens 30 is concave and its circumferential area 34 is concave. The optical axis area 36 of the image side surface 32 of the third lens 30 is convex and its The circumferential area 37 is convex. The object side surface 31 and the image side surface 32 of the third lens 30 are both spherical, but not limited to this.

The fourth lens 40 has a positive refractive power. The optical axis area 43 of the object side 41 of the fourth lens 40 is convex and its circumferential area 44 is convex. The optical axis area 46 of the image side 42 of the fourth lens 40 is convex and its The circumferential area 47 is convex. The object side surface 41 and the image side surface 42 of the fourth lens 40 are both spherical, but not limited to this.

The fifth lens 50 has a negative refractive power. The optical axis area 53 of the object side 51 of the fifth lens 50 is concave and its circumferential area 54 is concave. The optical axis area 56 of the image side 52 of the fifth lens 50 is concave and its The circumferential area 57 is concave. The object side 51 and the image side 52 of the fifth lens 50 are both spherical, but not limited to this.

The sixth lens 60 has a negative refractive power. The optical axis area 63 of the object side 61 of the sixth lens 60 is concave and its circumferential area 64 is concave. The optical axis area 66 of the image side 62 of the sixth lens 60 is convex and its The circumferential area 67 is convex. The object side surface 61 and the image side surface 62 of the sixth lens 60 are both aspherical, but not limited thereto.

The seventh lens 70 has a positive refractive power. The optical axis area 73 of the object side surface 71 of the seventh lens 70 is convex and its circumferential area 74 is convex. The optical axis area 76 of the image side surface 72 of the seventh lens 70 is concave and its The circumferential area 77 is concave. The object side surface 71 and the image side surface 72 of the seventh lens 70 are both spherical, but not limited to this.

It is worth noting that in this embodiment, both the fourth lens 40 and the fifth lens 50 are cemented lenses, that is, G45=0.

In the optical imaging lens 1 of the present invention, from the first lens 10 to the seventh lens 70, the object side surface 61 and the image side surface 62 of the sixth lens 60 are both aspherical, but not limited to this. If it is aspheric, these aspheric systems are defined by the following formula:

among them:

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 Y from the optical axis I on the aspheric surface is the vertical distance between the tangent to the vertex on the optical axis I of the aspheric surface);

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. 20, and the aspheric data is shown in FIG. 21. In the optical imaging lens system of the following embodiments, the aperture value (f-number) of the overall optical imaging lens is Fno, the effective focal length is (EFL), and the half field of view (Half Field of View, HFOV) is the overall optical imaging lens. Half of the maximum field of view (Field of View), where the image height, radius of curvature, thickness and focal length of the optical imaging lens are in millimeters (mm). In this embodiment, EFL=7.592 mm; HFOV=37.010 degrees; TTL=42.000 mm; Fno=2.000; ImgH=5.140 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 each lens with a different surface shape from the first embodiment are marked on the figure, and the rest are the same as those of the first embodiment. The optical axis area and the circumferential area of the lens with the same surface shape, such as concave or convex, are not separately labeled. Please refer to Fig. 9A for the longitudinal spherical aberration on the imaging surface 92 of the second embodiment, refer to Fig. 9B for the field curvature aberration in the sagittal direction, refer to Fig. 9C for the meridional field curvature aberration, and Fig. 9D for the distortion aberration . The design of the second embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis area 13 of the object side surface 11 of the first lens 10 is concave and its circumferential area 14 is concave. The third lens 30 has positive refractive power. The axis area 33 is a convex surface and its circumferential area 34 is a convex surface. The fourth lens 40 has a negative refractive power. The optical axis area 43 of the object side 41 of the fourth lens 40 is a concave surface and its circumferential area 44 is a concave surface. The fourth lens 40 The optical axis area 46 of the image side surface 42 is concave and its circumferential area 47 is concave. The fifth lens 50 has positive refractive power. The optical axis area 53 of the object side surface 51 of the fifth lens 50 is convex and its circumferential area 54 is Convex. In addition, there is only one filter (filter 90) in this embodiment, and the aperture 80 in this embodiment is located between the fifth lens 50 and the sixth lens 60. It is worth noting that in this embodiment, both the fourth lens 40 and the fifth lens 50 are cemented lenses, that is, G45=0.

The detailed optical data of the second embodiment is shown in FIG. 22, and the aspheric surface data is shown in FIG. 23. In this embodiment, EFL=6.136 mm; HFOV=41.000 degrees; TTL=39.161 mm; Fno=2.200; ImgH=4.100 mm. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. The half viewing angle of this embodiment is larger than that of the first embodiment; 3. The field in the sagittal direction of this embodiment The curvature aberration is smaller than the curvature of field aberration in the sagittal direction of the first embodiment; 4. The curvature of field aberration in this embodiment is less than the curvature of field aberration in the meridian direction of the first embodiment.

The 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 surface 92 of the third embodiment, refer to FIG. 11B for the field curvature aberration in the sagittal direction, refer to FIG. 11C for the meridional field curvature aberration, and refer to FIG. 11D for the distortion aberration . The design of the third embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the third lens 30 has positive refractive power, the optical axis area 33 of the object side surface 31 of the third lens 30 is convex and the circumferential area 34 thereof is convex, and the fourth lens 40 has negative refractive power. The optical axis area 43 of the object side surface 41 of the fourth lens 40 is concave and its circumferential area 44 is concave. The optical axis area 46 of the image side surface 42 of the fourth lens 40 is concave and its circumferential area 47 is concave. The fifth lens 50 The optical axis area 53 of the object side surface 51 is convex and its circumferential area 54 is convex. The sixth lens 60 has positive refractive power. The optical axis area 63 of the object side surface 61 of the sixth lens 60 is convex and its circumferential area 64 is Convex surface, the seventh lens 70 has a negative refractive power, the optical axis area 73 of the object side 71 of the seventh lens 70 is concave and its circumferential area 74 is concave, and the optical axis area 76 of the image side 72 of the seventh lens 70 is convex. . In addition, the aperture 80 in this embodiment is located between the fourth lens 40 and the fifth lens 50. It is worth noting that in this embodiment, both the third lens 30 and the fourth lens 40 are cemented lenses, that is, G34=0, and both the fifth lens 50 and the sixth lens 60 are cemented lenses, that is, G56= 0.

The detailed optical data of the third embodiment is shown in Fig. 24, and the aspherical data is shown in Fig. 25. In this embodiment, EFL=5.895 mm; HFOV=36.300 degrees; TTL=36.633 mm; Fno=2.000; ImgH =4.716 mm. In particular: 1. The system length TTL of this embodiment is shorter than the system length TTL of the first embodiment; 2. 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; 3. The distortion aberration of this embodiment is smaller than that of the first embodiment.

Fourth embodiment

Please refer to FIG. 12, which illustrates a fourth embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 13A for the longitudinal spherical aberration on the imaging surface 92 of the fourth embodiment, refer to FIG. 13B for the field curvature aberration in the sagittal direction, refer to FIG. 13C for the meridional field curvature aberration, and FIG. 13D for the distortion aberration . The design of the fourth embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the second lens 20 has a negative refractive power, the third lens 30 has a positive refractive power, the optical axis area 33 of the object side surface 31 of the third lens 30 is a convex surface, and its circumferential area 34 is a convex surface. The optical axis area 36 of the image side surface 32 of the third lens 30 is concave and its circumferential area 37 is concave. The fourth lens 40 has a negative refractive power. The optical axis area 46 of the image side surface 42 of the fourth lens 40 is concave and its The circumferential area 47 is a concave surface, the fifth lens 50 has a positive refractive power, the optical axis area 53 of the object side 51 of the fifth lens 50 is convex and the circumferential area 54 is convex, and the optical axis of the image side 62 of the sixth lens 60 Area 66 is concave. In addition, the aperture 80 in this embodiment is located between the fifth lens 50 and the sixth lens 60. It is worth noting that in this embodiment, both the fourth lens 40 and the fifth lens 50 are cemented lenses, that is, G45=0.

The detailed optical data of the fourth embodiment is shown in FIG. 26, and the aspheric surface data is shown in FIG. 27. In this embodiment, EFL=7.999 mm; HFOV=38.000 degrees; TTL=42.000 mm; Fno=2.200; ImgH=3.999 mm. In particular: 1. The half angle of view of this embodiment is greater 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. Please refer to FIG. 15A for the longitudinal spherical aberration on the imaging surface 92 of the fifth embodiment, refer to FIG. 15B for the field curvature aberration in the sagittal direction, refer to FIG. 15C for the meridional field curvature aberration, and FIG. 15D for the distortion aberration . The design of the fifth embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the optical axis region 13 of the object side 11 of the first lens 10 is a plane, the second lens 20 has negative refractive power, the third lens 30 has positive refractive power, and the object side of the third lens 30 The optical axis region 33 of 31 is a convex surface and its circumferential region 34 is convex. The optical axis region 36 of the image side surface 32 of the third lens 30 is concave and its circumferential region 37 is concave. The sixth lens 60 has positive refractive power. It is worth noting that in this embodiment, both the fourth lens 40 and the fifth lens 50 are cemented lenses, that is, G45=0.

The detailed optical data of the fifth embodiment is shown in Figure 28, and the aspherical data is shown in Figure 29. In this embodiment, EFL=9.037 mm; HFOV=34.500 degrees; TTL=44.592 mm; Fno=2.200; ImgH = 5.140 mm. In particular: 1. The curvature of field aberration in the noon direction in this embodiment is smaller than that in the noon direction in the first embodiment.

Sixth embodiment

Please refer to FIG. 16, which illustrates a sixth embodiment of the optical imaging lens 1 of the present invention. Please refer to FIG. 17A for the longitudinal spherical aberration on the imaging surface 92 in the sixth embodiment, refer to FIG. 17B for the field curvature aberration in the sagittal direction, refer to FIG. 17C for the meridional field curvature aberration, and refer to FIG. 17D for the distortion aberration . The design of the sixth embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the second lens 20 has a negative refractive power, the third lens 30 has a positive refractive power, the optical axis area 33 of the object side surface 31 of the third lens 30 is a convex surface, and its circumferential area 34 is a convex surface. The image side surface 32 of the third lens 30 has a concave circumferential area 37, the sixth lens 60 has a positive refractive power, the object side 61 of the sixth lens 60 has a convex optical axis area 63 and its circumferential area 64 has a convex surface. It is worth noting that in this embodiment, both the fourth lens 40 and the fifth lens 50 are cemented lenses, that is, G45=0.

The detailed optical data of the sixth embodiment is shown in Figure 30, and the aspherical data is shown in Figure 31. In this embodiment, EFL=5.655 mm; HFOV=34.500 degrees; TTL=44.592 mm; Fno=2.000; ImgH = 5.140 mm.

Seventh embodiment

Please refer to FIG. 18, which illustrates a seventh embodiment of the optical imaging lens 1 of the present invention. Please refer to Fig. 19A for the longitudinal spherical aberration on the imaging surface 92 of the seventh embodiment, Fig. 19B for the field curvature aberration in the sagittal direction, Fig. 19C for the meridional field curvature aberration, and Fig. 19D for the distortion aberration . The design of the seventh embodiment is similar to that of the first embodiment. The difference is that the lens refractive power, lens curvature radius, lens thickness, lens aspheric coefficient or back focal length and other related parameters are different. In addition, in this embodiment, the second lens 20 has a negative refractive power, the third lens 30 has a positive refractive power, the optical axis area 33 of the object side surface 31 of the third lens 30 is a convex surface, and its circumferential area 34 is a convex surface. The optical axis area 36 of the image side surface 32 of the third lens 30 is a concave surface and the circumferential area 37 thereof is a concave surface. It is worth noting that in this embodiment, both the fourth lens 40 and the fifth lens 50 are cemented lenses, that is, G45=0.

The detailed optical data of the seventh embodiment is shown in Figure 32, and the aspheric data is shown in Figure 33. In this embodiment, EFL=8.300 mm; HFOV=37.000 degrees; TTL=45.000 mm; Fno=2.000; ImgH = 5.140 mm. In particular: 1. The curvature of field aberration in the noon direction in this embodiment is smaller than that in the noon direction in the first embodiment.

In addition, the important parameters of each embodiment are sorted out in FIG. 34 respectively.

Each embodiment of the present invention provides an optical imaging lens with good imaging quality. For example, the concave-convex design that satisfies the following lens surface shape can effectively reduce field curvature and distortion rate, has the characteristics of optimizing the imaging quality of the optical imaging lens system, and the corresponding effects that can be achieved:

1 The optical imaging lens of the present invention satisfies the conditions that the first lens has a negative refractive index, EFL/ImgH≧1.100, and when the following conditions are met, it is beneficial to make the lens have a larger aperture (that is, a smaller Fno value) ), larger image height and high resolution, the better limit is 2.800≧EFL/ImgH≧1.100:

(1) The optical axis area 23 of the object side surface 21 of the second lens 20 is a concave surface, and the circumferential area 57 of the image side surface 52 of the fifth lens 50 is a concave surface.

(2) The second lens 20 has negative refractive power, the fifth lens 50 has negative refractive power, and the seventh lens 70 has positive refractive power.

(3) The circumferential area 17 of the image side surface 12 of the first lens 10 is concave, the fifth lens 50 has a negative refractive power, and the seventh lens 70 has a positive refractive power.

2. The optical imaging lens of the present invention further satisfies the following conditional expressions, which helps to maintain the system focal length and optical parameters to an appropriate value, avoiding any parameter that is too large to be conducive to the correction of the overall aberration of the optical imaging system, or Avoid any parameter that is too small to affect assembly or increase the difficulty of manufacturing.

(1) ALT*Fno/EFL≦10.600, the better limit range is 5.800≦ALT*Fno/EFL≦10.600;

(2) Tmax*Fno/EFL≦4.500, the better limit range is 1.500≦Tmax*Fno/EFL≦4.500;

(3) TTL/EFL≦8.000, the better limit range is 4.500≦TTL/EFL≦8.000.

3. The optical imaging lens of the present invention further satisfies the following conditional expressions, which helps to maintain an appropriate value for the thickness and spacing of each lens, avoids any parameter that is too large and is not conducive to the overall thinning of the optical imaging lens, or avoids any One parameter is too small to affect assembly or increase the difficulty of manufacturing.

(1) (AAG+BFL)/Tavg≦4.700, the preferred limit range is 2.000≦(AAG+BFL)/Tavg≦4.700;

(2) HFOV/ImgH≦10.000°/mm, the preferred limit range is 6.000°/mm≦HFOV/ImgH≦10.000°/mm;

(3) HFOV/AAG≦6.100°/mm, the better limit range is 2.500°/mm≦HFOV/AAG≦6.100°/mm;

(4) HFOV/BFL≦15.000 degrees/mm, the preferred limit range is 6.000 degrees/mm≦HFOV/BFL≦15.000 degrees/mm;

(5) (T5+G56)/T6≦3.500, the preferred limit range is 0.700≦(T5+G56)/T6≦3.500;

(6) (T4+G45)/T3≦2.500, the preferred limit range is 0.100≦(T4+G45)/T3≦2.500;

(7) (T4+G45+T5+G56)/T2≦1.600, the preferred limit range is 0.500≦(T4+G45+T5+G56)/T2≦1.600;

(8) (G34+G45+G56+G67)/G12≦2.000, the preferred limit range is 0.700≦(G34+G45+G56+G67)/G12≦2.000;

(9) (G23+G34+G45+G67)/T2≦1.300, the preferred limit range is 0.020≦(G23+G34+G45+G67)/T2≦1.300;

(10) (G23+G45+G56+G67)/T3≦2.900, the preferred limit range is 0.500≦(G23+G45+G56+G67)/T3≦2.900;

(11) (G23+G34+G45+G56)/T6≦6.000, the preferred limit range is 0.100≦(G23+G34+G45+G56)/T6≦6.000;

(12) (T4+T5+T7)/(T1+G12)≦3.700, the preferred limit range is 0.400≦(T4+T5+T7)/(T1+G12)≦3.700;

(13) (T4+T5+T7)/(T2+G23)≦2.100, the preferable limit range is 0.600≦(T4+T5+T7)/(T2+G23)≦2.100;

(14) (T4+T5+T7)/(T3+G34)≦3.600, the preferred limit range is 1.200≦(T4+T5+T7)/(T3+G34)≦3.600;

(15) (T4+T5+T7)/(T6+G67)≦10.000, the preferred limit range is 1.200≦(T4+T5+T7)/(T6+G67)≦10.000;

(16) (G34+G45+G56+BFL)/T6≦7.100, the preferred limit range is 0.800≦(G34+G45+G56+BFL)/T6≦7.100;

(17) ALT/AAG≦5.200, the better limit range is 1.700≦ALT/AAG≦5.200.

4. The use of glass material for all lenses in the embodiments of the present invention can extend the service life of the optical imaging lens and can withstand various weather temperature tests, so that the impact of various weather temperatures on the lens is minimized. In addition, matching all lenses with six lenses as spherical surfaces facilitates the use of ground glass, which can greatly reduce manufacturing costs compared to molded aspheric glass.

The three off-axis rays of 470nm, 555nm, and 650nm representing wavelengths at different heights in each embodiment of the present invention are concentrated near the imaging point, and the off-axis light at different heights can be seen from the deflection amplitude of each curve. The deviation of the imaging point of the light is controlled and has good spherical aberration, aberration and distortion suppression capabilities. Further referring to the imaging quality data, the distances between the three representative wavelengths of 470nm, 555nm and 650nm are also quite close to each other, which shows that the embodiment of the present invention has good concentration of light of different wavelengths under various conditions and has excellent Dispersion suppression capability, so it can be seen from the above that the embodiment of the present invention has good optical performance.

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

In view of the unpredictability of the optical system design, under the framework of the present invention, meeting the above conditional expressions can better shorten the length of the system of the present invention, increase the aperture, improve the image quality, or increase the assembly yield rate to improve the prior art Shortcomings.

The above-listed exemplary limiting relational expressions can also be combined arbitrarily and unequal numbers to be used in the embodiments of the present invention, and they are not limited thereto. In the implementation of the present invention, in addition to the aforementioned relational expressions, other detailed structures such as the arrangement of concave-convex curved surfaces of more lenses can also be designed for a single lens or broadly for multiple lenses to enhance system performance and/or Resolution control. It should be noted that these details need to be selectively combined and applied to 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 foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with 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, 110, 410, 510: Object side 12, 22, 32, 42, 52, 62, 72, 120, 320: like side 13, 16, 23, 26, 33, 36, 43, 46, 53, 56, 63, 66, 73, 76, Z1: Optical axis area 14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77, 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: aperture 90: filter 91: protective glass 92: imaging surface 100, 200, 300, 400, 500: lens 130: Assembly Department 211, 212: parallel rays A1: Object side A2: Image side CP: central point CP1: the 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: edge light EL: extension cord Z3: Relay zone M: intersection point R: Intersection point T1, T2, T3, T4, T5, T6, T7: the thickness of each lens on the optical axis

1 to 5 are schematic diagrams of the method for judging the curvature shape of the optical imaging lens of the present invention. FIG. 6 is a schematic diagram of the first embodiment of the optical imaging lens of the present invention. FIG. 7A illustrates the longitudinal spherical aberration on the imaging surface of the first embodiment. FIG. 7B illustrates the curvature of field aberration in the sagittal direction of the first embodiment. FIG. 7C illustrates the curvature of field aberration in the tangential direction of the first embodiment. FIG. 7D illustrates the distortion aberration of the first embodiment. FIG. 8 is a schematic diagram of a second embodiment of the optical imaging lens of the present invention. FIG. 9A illustrates the longitudinal spherical aberration on the imaging surface of the second embodiment. FIG. 9B illustrates the curvature of field aberration in the sagittal direction of the second embodiment. FIG. 9C illustrates the curvature of field aberration in the tangential direction of the second embodiment. FIG. 9D illustrates 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 illustrates the longitudinal spherical aberration on the imaging surface of the third embodiment. FIG. 11B illustrates the curvature of field aberration in the sagittal direction of the third example. FIG. 11C illustrates the curvature of field aberration in the tangential direction of the third example. 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 illustrates the longitudinal spherical aberration on the imaging surface of the fourth embodiment. FIG. 13B illustrates the curvature of field aberration in the sagittal direction of the fourth example. FIG. 13C illustrates the curvature of field aberration in the tangential direction of the fourth example. FIG. 13D shows the distortion aberration of the fourth embodiment. FIG. 14 is a schematic diagram of a fifth embodiment of the optical imaging lens of the present invention. FIG. 15A shows the longitudinal spherical aberration on the imaging surface of the fifth embodiment. 15B shows the curvature of field aberration in the sagittal direction of the fifth example. FIG. 15C illustrates the curvature of field aberration in the tangential direction of the fifth example. 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 surface of the sixth embodiment. FIG. 17B shows the curvature of field aberration in the sagittal direction of the sixth example. FIG. 17C illustrates the curvature of field aberration in the tangential direction of the sixth example. FIG. 17D shows the distortion aberration of the sixth example. FIG. 18 is a schematic diagram of a seventh embodiment of the optical imaging lens of the present invention. FIG. 19A shows the longitudinal spherical aberration on the imaging surface of the seventh embodiment. FIG. 19B illustrates the curvature of field aberration in the sagittal direction of the seventh example. FIG. 19C illustrates the curvature of field aberration in the tangential direction of the seventh example. FIG. 19D shows the distortion aberration of the seventh example. Fig. 20 shows detailed optical data of the first embodiment. Fig. 21 shows detailed aspheric surface data of the first embodiment. Fig. 22 shows detailed optical data of the second embodiment. Fig. 23 shows detailed aspheric surface data of the second embodiment. Fig. 24 shows detailed optical data of the third embodiment. Fig. 25 shows detailed aspheric surface data of the third embodiment. Fig. 26 shows detailed optical data of the fourth embodiment. Fig. 27 shows detailed aspheric surface data of the fourth embodiment. Fig. 28 shows detailed optical data of the fifth embodiment. Fig. 29 shows detailed aspheric data of the fifth embodiment. Fig. 30 shows detailed optical data of the sixth embodiment. Fig. 31 shows detailed aspheric surface data of the sixth embodiment. Fig. 32 shows detailed optical data of the seventh embodiment. Fig. 33 shows detailed aspheric surface data of the seventh embodiment. Fig. 34 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: Object side

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

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

14, 17, 24, 27, 34, 37, 44, 47, 54, 57, 64, 67, 74, 77: 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: aperture

90: filter

91: protective glass

92: imaging surface

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

Claims (20)

An optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and an optical axis in sequence from an object side to an image side. A seventh lens, and each of the first lens to the seventh lens includes an object side facing the object side and allowing imaging light to pass, and an image side facing the image side and passing the imaging light, the optical imaging lens includes: The first lens has a negative refractive power; An optical axis area of the object side surface of the second lens is concave; A circumferential area of the image side surface of the fifth lens is concave; The lens of the optical imaging lens is composed of the above seven lenses and meets the following conditional formula: EFL/ImgH≧1.100, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens. An optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and an optical axis in sequence from an object side to an image side. A seventh lens, and each of the first lens to the seventh lens includes an object side facing the object side and allowing imaging light to pass, and an image side facing the image side and passing the imaging light, the optical imaging lens includes: The first lens has a negative refractive power; The second lens has a negative refractive power; The fifth lens has a negative refractive power; The seventh lens has positive refractive power; The lens of the optical imaging lens is composed of the above seven lenses and meets the following conditional formula: EFL/ImgH≧1.100, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens. An optical imaging lens, which includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and an optical axis in sequence from an object side to an image side. A seventh lens, and each of the first lens to the seventh lens includes an object side facing the object side and allowing imaging light to pass, and an image side facing the image side and passing the imaging light, the optical imaging lens includes: The first lens has a negative refractive power, and a circumferential area of the image side surface thereof is concave; The fifth lens has a negative refractive power; The seventh lens has positive refractive power; The lens of the optical imaging lens is composed of the above seven lenses and meets the following conditional formula: EFL/ImgH≧1.100, where EFL is defined as the effective focal length of the optical imaging lens, and ImgH is defined as the image height of the optical imaging lens. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein ALT is defined as the total thickness of the seven lenses on the optical axis from the first lens to the seventh lens, and Fno is defined as The aperture value of the optical imaging lens, and the optical imaging lens satisfies the following condition: ALT*Fno/EFL≦10.600. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein Tmax is the thickest lens thickness of the first lens to the seventh lens on the optical axis, and Fno is defined as the optical imaging lens The aperture value of the lens, and the optical imaging lens meets the following conditions: Tmax*Fno/EFL≦4.500. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein TTL is defined as the distance on the optical axis from the object side of the first lens to an imaging surface, and the optical imaging lens Meet the following conditions: TTL/EFL≦8.000. For the optical imaging lens of any one of claim 1, claim 2, and claim 3, AAG is defined as the sum of six air gaps on the optical axis from the first lens to the seventh lens, and BFL is defined as the The distance from the image side surface of the seventh lens to an imaging surface on the optical axis, Tavg is the average lens thickness of the first lens to the seventh lens on the optical axis, and the optical imaging lens satisfies the following conditions: (AAG +BFL)/Tavg≦4.700. For example, the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein HFOV is the half angle of view of the optical imaging lens, and the optical imaging lens satisfies the following condition: HFOV/ImgH≦10.000 degrees/mm. For example, the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein HFOV is the half angle of view of the optical imaging lens, and AAG is defined as the distance between the first lens and the seventh lens on the optical axis The total of six air gaps, and the optical imaging lens meets the following conditions: HFOV/AAG≦6.100 degrees/mm. For example, the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein HFOV is the half angle of view of the optical imaging lens, and BFL is defined as the image side to an imaging surface of the seventh lens in the light The distance on the axis, and the optical imaging lens meets the following conditions: HFOV/BFL≦15.000 degrees/mm. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein T3 is defined as the thickness of the third lens on the optical axis, and T4 is defined as the thickness of the fourth lens on the optical axis Thickness, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and the optical imaging lens satisfies the following condition: (T4+G45)/T3≦2.500. For example, in the optical imaging lens of any one of claim 1, claim 2, and claim 3, T2 is defined as the thickness of the second lens on the optical axis, and T4 is defined as the thickness of the fourth lens on the optical axis. Thickness, T5 is defined as the thickness of the fifth lens on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and G56 is defined as the fifth lens to the sixth lens There is an air gap on the optical axis, and the optical imaging lens satisfies the following conditions: (T4+G45+T5+G56)/T2≦1.600. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where G12 is defined as the air gap between the first lens and the second lens on the optical axis, and G34 is defined as the third lens To the air gap between the fourth lens and the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis. The air gap on the axis, G67 is defined as the air gap from the sixth lens to the seventh lens on the optical axis, and the optical imaging lens satisfies the following conditions: (G34+G45+G56+G67)/G12≦2.000. For the optical imaging lens of any one of claim 1, claim 2, and claim 3, T2 is defined as the thickness of the second lens on the optical axis, and G23 is defined as the thickness between the second lens and the third lens The air gap on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, and G45 is defined as the air gap on the optical axis from the fourth lens to the fifth lens, G67 is defined as the air gap between the sixth lens and the seventh lens on the optical axis, and the optical imaging lens satisfies the following conditions: (G23+G34+G45+G67)/T2≦1.300. For the optical imaging lens of any one of claim 1, claim 2, and claim 3, T3 is defined as the thickness of the third lens on the optical axis, and G23 is defined as the thickness between the second lens and the third lens The air gap on the optical axis, G45 is defined as the air gap between the fourth lens and the fifth lens on the optical axis, and G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis, G67 is defined as the air gap between the sixth lens and the seventh lens on the optical axis, and the optical imaging lens satisfies the following conditions: (G23+G45+G56+G67)/T3≦2.900. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, where T6 is defined as the thickness of the sixth lens on the optical axis, and G23 is defined as the thickness of the second lens to the third lens The air gap on the optical axis, G34 is defined as the air gap between the third lens and the fourth lens on the optical axis, and G45 is defined as the air gap on the optical axis from the fourth lens to the fifth lens, G56 is defined as the air gap between the fifth lens and the sixth lens on the optical axis, and the optical imaging lens satisfies the following conditions: (G23+G34+G45+G56)/T6≦6.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein T1 is defined as the thickness of the first lens on the optical axis, and T4 is defined as the thickness of the fourth lens on the optical axis Thickness, T5 is defined as the thickness of the fifth lens on the optical axis, T7 is defined as the thickness of the seventh lens on the optical axis, G12 is defined as the thickness of the first lens to the second lens on the optical axis Air gap, and the optical imaging lens meets the following conditions: (T4+T5+T7)/(T1+G12)≦3.700. For example, in the optical imaging lens of any one of claim 1, claim 2, and claim 3, T2 is defined as the thickness of the second lens on the optical axis, and T4 is defined as the thickness of the fourth lens on the optical axis. Thickness, T5 is defined as the thickness of the fifth lens on the optical axis, T7 is defined as the thickness of the seventh lens on the optical axis, G23 is defined as the thickness of the second lens to the third lens on the optical axis Air gap, and the optical imaging lens meets the following conditions: (T4+T5+T7)/(T2+G23)≦2.100. For the optical imaging lens of any one of claim 1, claim 2, and claim 3, T4 is defined as the thickness of the fourth lens on the optical axis, and T5 is defined as the thickness of the fifth lens on the optical axis. Thickness, T6 is defined as the thickness of the sixth lens on the optical axis, T7 is defined as the thickness of the seventh lens on the optical axis, G67 is defined as the thickness of the sixth lens to the seventh lens on the optical axis Air gap, and the optical imaging lens meets the following conditions: (T4+T5+T7)/(T6+G67)≦10.000. Such as the optical imaging lens of any one of claim 1, claim 2, and claim 3, wherein ALT is defined as the total thickness of the seven lenses on the optical axis from the first lens to the seventh lens, and AAG is defined as The total of six air gaps on the optical axis from the first lens to the seventh lens, and the optical imaging lens satisfies the following condition: ALT/AAG≦5.200.

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