Optical imaging lens

Abstract

The present invention discloses an optical imaging lens, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in order from the object side to the image side along the optical axis, and the first lens to the seventh lens each comprise an object side surface facing the object side and allowing imaging light to pass through, and an image side surface facing the image side and allowing imaging light to pass through, the first lens has a positive refractive power, the circumferential region of the object side surface of the fourth lens is a convex surface, the fifth lens has a positive refractive power, the sixth lens has a positive refractive power, the optical axis region of the object side surface of the seventh lens is a convex surface, and the second lens has a negative refractive power or the third lens has a positive refractive power or the seventh lens has a negative refractive power, wherein the optical imaging lens has only seven lenses, and the optical imaging lens has at least one adjustable air gap.

Description

Technical Field

[0001] The present invention belongs to the field of optical elements, and in particular relates to an optical imaging lens. Background Art

[0002] In recent years, optical imaging lenses have been continuously evolving, and their applications have become more extensive. In addition to requiring the lenses to be thin, light, and short, the design of a small aperture value (Fno) is conducive to increasing the light flux, and a large field of view is gradually becoming a trend. In addition, the demand for recording and shooting portable electronic products is also increasing. The optical zoom of a single zoom lens or the digital zoom of multiple fixed-focus lenses can meet different shooting needs. However, in addition to the fact that the shooting system composed of multiple fixed-focus lenses takes up more space, when adjusting the focal length during recording, different lenses may also cause discontinuity in picture resolution or field of view. Therefore, how to design an optical imaging lens that is both thin, light, and short and has a zoom effect has become a problem that needs to be solved urgently. Summary of the invention

[0003] In view of the above problems, the present invention provides an optical imaging lens having a small aperture value, a small size and excellent optical performance.

[0004] The present invention provides 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 a seventh lens in order from the object side to the image side along the optical axis, and the first lens to the seventh lens each include an object side surface facing the object side and allowing the imaging light to pass through, and an image side surface facing the image side and allowing the imaging light to pass through. The first lens has a positive refractive power. The second lens has a negative refractive power or the third lens has a positive refractive power or the seventh lens has a negative refractive power. The circumferential area of ​​the object side surface of the fourth lens is a convex surface. The fifth lens has a positive refractive power. The sixth lens has a positive refractive power. The optical axis area of ​​the object side surface of the seventh lens is a convex surface. Among them, the optical imaging lens has only the above-mentioned seven lenses, and the optical imaging lens has at least one adjustable air gap.

[0005] The present invention further provides 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 a seventh lens in order along the optical axis from the object side to the image side, and the first lens to the seventh lens each include an object-side surface facing the object side and allowing the imaging light to pass through, and an image-side surface facing the image side and allowing the imaging light to pass through. The circumferential area of ​​the object-side surface of the fourth lens is a convex surface. The fifth lens has a positive refractive power. The sixth lens has a positive refractive power. The optical axis area of ​​the object-side surface of the seventh lens is a convex surface and the circumferential area of ​​the object-side surface of the seventh lens is a concave surface. Among them, the optical imaging lens has only the above-mentioned seven lenses, and the optical imaging lens has at least one adjustable air gap.

[0006] The present invention further provides 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 a seventh lens in order from the object side to the image side along the optical axis, and the first lens to the seventh lens each include an object side surface facing the object side and allowing the imaging light to pass through, and an image side surface facing the image side and allowing the imaging light to pass through. The first lens has a positive refractive power and the circumferential area of ​​the image side surface of the first lens is a convex surface. The circumferential area of ​​the object side surface of the fourth lens is a convex surface. The fifth lens has a positive refractive power. The seventh lens has a negative refractive power and the optical axis area of ​​the image side surface of the seventh lens is a concave surface. The second lens has a negative refractive power or the third lens has a positive refractive power or the sixth lens has a positive refractive power. Among them, the optical imaging lens has only the above-mentioned seven lenses, and the optical imaging lens has at least one adjustable air gap.

[0007] The present invention further provides 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 a seventh lens in order from the object side to the image side along the optical axis, and the first lens to the seventh lens each include an object side surface facing the object side and allowing the imaging light to pass through, and an image side surface facing the image side and allowing the imaging light to pass through. The circumferential area of ​​the image side surface of the first lens is a convex surface. The circumferential area of ​​the image side surface of the second lens is a concave surface. The third lens has a positive refractive power. The fifth lens has a positive refractive power. The seventh lens has a negative refractive power. The optical axis area of ​​the image side surface of the seventh lens is a concave surface. Among them, the optical imaging lens has at least an adjustable air gap, and the first lens has a positive refractive power or the second lens has a negative refractive power or the sixth lens has a positive refractive power.

[0008] Based on the above, the beneficial effect of the optical imaging lens of the embodiment of the present invention is that by satisfying the above-mentioned concave and convex surface arrangement design of the lens, the refractive index conditions and the design of adjustable air gap, the optical imaging lens has a smaller aperture value, a smaller volume and still has good optical performance at different focal lengths.

[0009] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly understand the embodiments of the present invention, please refer to the following figures:

[0011] Figure 1 It is a schematic diagram illustrating the surface structure of a lens.

[0012] Figure 2 It is a schematic diagram illustrating the concave-convex structure of a lens surface and the intersection of light rays.

[0013] Figure 3 is a schematic diagram illustrating the surface structure of a lens of Example 1.

[0014] Figure 4 is a schematic diagram illustrating the surface structure of a lens of Example 2.

[0015] Figure 5 is a schematic diagram illustrating the surface structure of a lens of Example 3.

[0016] Figure 6 FIG. 4 is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention.

[0017] Figure 7 A to Figure 7 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment.

[0018] Figure 8 A table diagram showing detailed optical data of the optical imaging lens according to the first embodiment of the present invention.

[0019] Fig. 9 A table diagram showing aspherical parameters of the optical imaging lens according to the first embodiment of the present invention.

[0020] Fig.10 FIG. 4 is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention.

[0021] Fig.11 A to Fig.11 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the second embodiment.

[0022] Fig.12 A table diagram showing detailed optical data of the optical imaging lens according to the second embodiment of the present invention.

[0023] Fig.13 A table diagram showing aspherical parameters of the optical imaging lens according to the second embodiment of the present invention.

[0024] Fig.14 FIG. 4 is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention.

[0025] Fig.15 A to Fig.15 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment.

[0026] Fig.16 A table showing detailed optical data of the optical imaging lens according to the third embodiment of the present invention.

[0027] Fig.17 A table showing aspherical parameters of the optical imaging lens according to the third embodiment of the present invention.

[0028] Fig.18FIG. 4 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention.

[0029] Fig.19 A to Fig.19 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the fourth embodiment.

[0030] Fig. 20 A table showing detailed optical data of the optical imaging lens according to the fourth embodiment of the present invention.

[0031] Fig.21 A table showing aspherical parameters of the optical imaging lens according to the fourth embodiment of the present invention.

[0032] Fig. 22 FIG. 4 is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention.

[0033] Fig.23 A to Fig.23 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the fifth embodiment.

[0034] Fig.24 A table showing detailed optical data of the optical imaging lens according to the fifth embodiment of the present invention.

[0035] Fig.25 A table showing aspherical parameters of the optical imaging lens according to the fifth embodiment of the present invention.

[0036] Fig.26 FIG. 4 is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention.

[0037] Fig. 27 A to Fig. 27 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the sixth embodiment.

[0038] Fig.28 A table showing detailed optical data of the optical imaging lens according to the sixth embodiment of the present invention.

[0039] Fig.29 A table showing aspherical parameters of the optical imaging lens according to the sixth embodiment of the present invention.

[0040] Fig.30 FIG. 4 is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention.

[0041] Fig.31 A to Fig.31 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the seventh embodiment.

[0042] Fig.32A table showing detailed optical data of the optical imaging lens according to the seventh embodiment of the present invention.

[0043] Fig.33 A table showing aspherical parameters of the optical imaging lens according to the seventh embodiment of the present invention.

[0044] Fig.34 is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention.

[0045] Fig.35 A to Fig.35 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment.

[0046] Fig.36 A table showing detailed optical data of the optical imaging lens according to the eighth embodiment of the present invention.

[0047] Fig.37 A table showing aspherical parameters of the optical imaging lens according to the eighth embodiment of the present invention is shown.

[0048] Fig.38 A numerical table showing relationship equations of important parameters of the optical imaging lenses of the first to fourth embodiments of the present invention.

[0049] Fig.39 A numerical table showing relationship equations of important parameters of the optical imaging lenses of the fifth to eighth embodiments of the present invention. DETAILED DESCRIPTION

[0050] Before describing the present invention in detail, the symbols in the accompanying drawings are first clearly indicated: 0: aperture; 1: first lens; 2: second lens; 3: third lens; 4: fourth lens; 5: fifth lens; 6: sixth lens; 7: seventh lens; 9: filter; 10: optical imaging lens; 15, 25, 35, 45, 55, 65, 75, 95, 110, 410, 510: object side; 16, 26, 36, 46, 56, 66, 76, 96, 120, 320: image side; 99: imaging surface; 100, 200, 300, 400, 500: lens; 130: assembly part; 151, 161, 251, 261, 351, 361, 451, 461, 551, 561, 651, 661, 751, 761, Z1: optical axis area; 153, 163, 253, 263, 353, 363, 453, 463, 553, 563, 653, 663, 753, 763, Z2: circular area; 211, 212: parallel light rays; A1: object side; A2: image side; D1, D2, D3: adjustable air gap; CP: center point; CP1: first center point; CP2: second center point; EL: extension line; I: optical axis; Lc: principal light ray; Lm: marginal light ray; M, R: intersection point; OB: optical boundary; TP1: first transition point; TP2: second transition point; Z3: relay area.

[0051] The terms "optical axis region", "circumferential region", "concave surface" and "convex surface" used in this specification and the claims should be interpreted based on the definitions listed in this specification.

[0052] The optical system of the present specification includes at least one lens, which receives imaging light from the incident optical system that is parallel to the optical axis and within a half-viewing angle (HFOV) relative to the optical axis. The imaging light is imaged on the imaging surface through the optical system. The "lens has a positive refractive power (or negative refractive power)" refers to the paraxial refractive power of the lens calculated by Gaussian optical theory is positive (or negative). The "object side (or image side) of the lens" is defined as a specific range of the imaging light passing through the lens surface. The imaging light includes at least two types of light: the chief ray Lc and the marginal ray Lm (such as Figure 1 The object side (or image side) of the lens can be divided into different regions according to different positions, including an optical axis region, a circumferential region, or one or more intermediate regions in some embodiments. The description of these regions will be described in detail below.

[0053] Figure 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a transition point. The center point of the lens surface is an intersection of the surface and the optical axis I. Figure 1 As shown in the example, 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. A conversion point is a point on the lens surface, and the tangent of the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All conversion points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of the lens 100 may have no conversion points or at least one conversion point. If a single lens surface has multiple conversion points, the conversion points are named in sequence from the first conversion point in the radial outward direction. For example, the first conversion point TP1 (closest to the optical axis I), the second conversion point TP2 (closest to the optical axis I), and the second conversion point TP2 (closest to the optical axis I) may be named in sequence. Figure 4 as shown) and the Nth conversion point (farthest from the optical axis I).

[0054] When the lens surface has at least one transition point, the range from the center point to the first transition point TP1 is defined as the optical axis area, wherein the optical axis area includes the center point. The area radially outward from the transition point farthest from the optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be further included, and the number of relay areas depends on the number of transition points. When the lens surface does not have a transition point, 0% to 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, and 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area.

[0055] When a light ray parallel to the optical axis I passes through an area, if the light ray is deflected toward the optical axis I and the intersection with the optical axis I is located at the image side A2 of the lens, then the area is convex. When a light ray parallel to the optical axis I passes through an area, if the intersection of the extended line of the light ray and the optical axis I is located at the object side A1 of the lens, then the area is concave.

[0056] In addition, see Figure 1 The lens 100 may further include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 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 portion 130. The structure and shape of the assembly portion 130 are merely 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 in the drawings.

[0057] See also Figure 2 , define the area between the center point CP and the first transition point TP1 as the optical axis area Z1. Define the area between the first transition point TP1 and the optical boundary OB of the lens surface as the circumferential area Z2. Figure 2As shown, after passing through the optical axis region Z1, the parallel light 211 intersects with the optical axis I at the image side A2 of the lens 200, that is, the focus of the parallel light 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the light 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 light 212 diverges after passing through the circumferential region Z2. Figure 2 As shown, the extended line EL of the parallel light 212 after passing through the circumferential area Z2 intersects with the optical axis I at the object side A1 of the lens 200, that is, the focus 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 extended line EL of the light intersects with the optical axis I at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. Figure 2 In the lens 200 shown, the first transition point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first transition point TP1 is the boundary point where the convex surface turns into the concave surface.

[0058] On the other hand, the surface convexity of the optical axis area can also be determined according to the judgment method of the general knowledgeable person in the field, that is, the convexity of the surface shape of the optical axis area of ​​the lens can be determined by the positive and negative signs of the curvature radius of the paraxial axis (abbreviated as R value). R value can be commonly used in optical design software, such as Zemax or CodeV. 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, the optical axis area of ​​the object side is determined to be convex; when the R value is negative, the optical axis area of ​​the object side is determined to be concave. On the contrary, 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 result of this method is consistent with the result of the above-mentioned determination method by the intersection of the light ray / light extension line and the optical axis. The determination method of the intersection of the light ray / light extension line and the optical axis is to determine the surface convexity by locating the focus of a light ray parallel to the optical axis on the object side or the image side of the lens. The terms “a region is a convex surface (or a concave surface)”, “a region is convex (or concave)” or “a convex (or concave) region” described in this specification can be used interchangeably.

[0059] Figures 3 to 5 Examples are provided for determining the surface shape and area boundaries of lens areas in various situations, including the aforementioned optical axis area, circumferential area, and relay area.

[0060] Figure 3 is a radial cross-sectional view of the lens 300. Figure 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 as follows: Figure 3 The R value of the image-side surface 320 is positive (ie, R>0), and therefore, the optical axis region Z1 is a concave surface.

[0061] Generally speaking, the shapes of the areas bounded by the conversion point are opposite to those of the adjacent areas. Therefore, the conversion point can be used to define the transition of the surface shape, that is, from concave to convex or from convex to concave. Figure 3 In the figure, since the optical axis area Z1 is a concave surface, the surface shape changes at the transition point TP1, so the circumferential area Z2 is a convex surface.

[0062] Figure 4 is a radial cross-sectional view of the lens 400. Figure 4 , there is a first transition point TP1 and a second transition point TP2 on the object side surface 410 of the lens 400. The area between the optical axis I and the first transition point TP1 is defined as an optical axis region Z1 of the object side surface 410. The R value of the object side surface 410 is positive (ie, R>0), and therefore, the optical axis region Z1 is a convex surface.

[0063] The area between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circumferential area Z2, and the circumferential area Z2 of the object side surface 410 is also a convex surface. In addition, the area between the first transition point TP1 and the second transition point TP2 is defined as a relay area Z3, and the relay area Z3 of the object side surface 410 is a concave surface. Figure 4 The object side surface 410 includes, radially outward from the optical axis I, an optical axis region Z1 between the optical axis I and the first conversion point TP1, a relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and a circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400. Since the optical axis region Z1 is a convex surface, the surface shape changes from the first conversion point TP1 to a concave surface, so the relay region Z3 is a concave surface, and the surface shape changes from the second conversion point TP2 to a convex surface, so the circumferential region Z2 is a convex surface.

[0064] Figure 5 is a radial cross-sectional view of the lens 500. The object side surface 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the object side surface 510 of the lens 500, 0% to 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, and 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area. Figure 5 The lens 500 shown in the figure defines the optical axis region Z1 of the object side surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of the object side surface 510 is positive (i.e., R>0), so 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 region Z2 of the object side surface 510 is also a convex surface. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0065] Figure 6 FIG. 4 is a schematic diagram of an optical imaging lens according to a first embodiment of the present invention. Figure 7 A to Figure 7 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment. Figure 6 The optical imaging lens 10 of the first embodiment of the present invention includes a first lens 1, a second lens 2, an aperture 0, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7 and a filter 9 in order from the object side A1 to the image side A2 along an optical axis I of the optical imaging lens 10. When light emitted by an object to be photographed enters the optical imaging lens 10 and passes through the first lens 1, the second lens 2, the aperture 0, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the filter 9, an image is formed on an image plane 99. The filter 9 is disposed between the image side surface 76 of the seventh lens 7 and the image plane 99. It is additionally explained that the object side A1 is the side facing the object to be photographed, and the image side A2 is the side facing the image plane 99. In this embodiment, the filter 9 is an infrared cut filter (IR Cut Filter).

[0066] In this embodiment, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7 and the filter 9 of the optical imaging lens 10 each have an object-side surface 15, 25, 35, 45, 55, 65, 75, 95 facing the object side A1 and allowing the imaging light to pass through, and an image-side surface 16, 26, 36, 46, 56, 66, 76, 96 facing the image side A2 and allowing the imaging light to pass through. In this embodiment, the aperture O is disposed between the second lens 2 and the third lens 3.

[0067] The first lens 1 has a positive refractive power. The optical axis region 151 of the object side surface 15 of the first lens 1 is a convex surface, and the circumferential region 153 thereof is a concave surface. The optical axis region 161 of the image side surface 16 of the first lens 1 is a convex surface, and the circumferential region 163 thereof is a convex surface. In the present embodiment, both the object side surface 15 and the image side surface 16 of the first lens 1 are aspheric surfaces, but the present invention is not limited thereto.

[0068] The second lens 2 has a negative refractive power. The optical axis region 251 of the object side surface 25 of the second lens 2 is a convex surface, and the circumferential region 253 thereof is a convex surface. The optical axis region 261 of the image side surface 26 of the second lens 2 is a concave surface, and the circumferential region 263 thereof is a concave surface. In the present embodiment, both the object side surface 25 and the image side surface 26 of the second lens 2 are aspherical surfaces, but the present invention is not limited thereto.

[0069] The third lens 3 has a positive refractive power. The optical axis region 351 of the object side surface 35 of the third lens 3 is a convex surface, and the circumferential region 353 thereof is a convex surface. The optical axis region 361 of the image side surface 36 of the third lens 3 is a convex surface, and the circumferential region 363 thereof is a convex surface. In the present embodiment, both the object side surface 35 and the image side surface 36 of the third lens 3 are aspherical surfaces, but the present invention is not limited thereto.

[0070] The fourth lens 4 has a negative refractive power. The optical axis region 451 of the object side surface 45 of the fourth lens 4 is a concave surface, and the circumferential region 453 thereof is a convex surface. The optical axis region 461 of the image side surface 46 of the fourth lens 4 is a concave surface, and the circumferential region 463 thereof is a concave surface. In the present embodiment, both the object side surface 45 and the image side surface 46 of the fourth lens 4 are aspherical surfaces, but the present invention is not limited thereto.

[0071] The fifth lens 5 has a positive refractive power. The optical axis region 551 of the object side surface 55 of the fifth lens 5 is a convex surface, and the circumferential region 553 thereof is a convex surface. The optical axis region 561 of the image side surface 56 of the fifth lens 5 is a concave surface, and the circumferential region 563 thereof is a convex surface. In the present embodiment, both the object side surface 55 and the image side surface 56 of the fifth lens 5 are aspherical surfaces, but the present invention is not limited thereto.

[0072] The sixth lens 6 has a positive refractive power. The optical axis region 651 of the object side surface 65 of the sixth lens 6 is a concave surface, and the circumferential region 653 thereof is a concave surface. The optical axis region 661 of the image side surface 66 of the sixth lens 6 is a convex surface, and the circumferential region 663 thereof is a convex surface. In the present embodiment, both the object side surface 65 and the image side surface 66 of the sixth lens 6 are aspherical surfaces, but the present invention is not limited thereto.

[0073] The seventh lens element 7 has a negative refractive power. The optical axis region 751 of the object side surface 75 of the seventh lens element 7 is a convex surface, and the circumferential region 753 thereof is a concave surface. The optical axis region 761 of the image side surface 76 of the seventh lens element 7 is a concave surface, and the circumferential region 763 thereof is a concave surface. In the present embodiment, both the object side surface 75 and the image side surface 76 of the seventh lens element 7 are aspherical surfaces, but the present invention is not limited thereto.

[0074] In this embodiment, the optical imaging lens 10 has only the above-mentioned seven lenses. In addition, the optical imaging lens 10 is a zoom lens, the air gap G23 between the second lens 2 and the third lens 3 on the optical axis I is an adjustable air gap D1, the air gap G56 between the fifth lens 5 and the sixth lens 6 on the optical axis I is an adjustable air gap D2, and the air gap G7F between the seventh lens 7 and the filter 9 on the optical axis I is an adjustable air gap D3. Therefore, by changing the distances of the adjustable air gaps D1, D2, and D3 in the optical imaging lens 10, the optical imaging lens 10 can form a clear image within the effective focal length (EFL) range of 13.959 millimeters (Millimiter, mm) to 20.898 millimeters.

[0075] Other detailed optical data of the first embodiment are as follows Figure 8 As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the first embodiment are 3.482 mm, 2.958 mm, and 1.916 mm, respectively, the optical imaging lens 10 is in a short-focus (wide-angle) mode, and its effective focal length is 13.959 mm, the aperture value (F-number, Fno) is 3.021, the half field of view (Half Field of View, HFOV) is 12.831 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I (as shown in FIG. 1 ) is 0. Figure 8 TL in is 18.442 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I (as shown in FIG. Figure 8 On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the first embodiment are 0.071 mm, 0.908 mm, and 6.778 mm, respectively, the optical imaging lens 10 is in a telephoto mode, and its effective focal length is 20.898 mm, the aperture value is 4.524, the half viewing angle is 8.477 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 12.981 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 7.686 mm.

[0076] In addition, in this embodiment, the object-side surfaces 15, 25, 35, 45, 55, 65, 75 and the image-side surfaces 16, 26, 36, 46, 56, 66, 76 of the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6 and the seventh lens 7, a total of fourteen surfaces, are aspherical surfaces, wherein the object-side surfaces 15, 25, 35, 45, 55, 65, 75 and the image-side surfaces 16, 26, 36, 46, 56, 66, 76 are general even asphere surfaces. These aspherical surfaces are defined according to the following formula (1):

[0077]

[0078] in:

[0079] R: radius of curvature of the lens surface at the near optical axis I;

[0080] Z: Depth of the aspherical surface (the vertical distance between the point on the aspherical surface that is Y away from the optical axis I and the tangent plane tangent to the vertex on the aspherical surface optical axis I);

[0081] Y: the vertical distance between the point on the aspheric curve and the optical axis I;

[0082] K: conic constant;

[0083] a i : i-th order aspheric coefficient.

[0084] The aspheric coefficients of the various items from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 in formula (1) are as follows: Fig. 9 As shown. Among them, Fig. 9 The column number 15 in the middle represents the aspheric coefficient of the object side surface 15 of the first lens 1, and the same applies to the other columns. In this embodiment and the following embodiments, the second-order aspheric coefficient a2 is 0.

[0085] In addition, the relationship between the important parameters of the optical imaging lens 10 of the first embodiment is as follows: Fig.38 shown.

[0086] in,

[0087] T1 is the thickness of the first lens 1 on the optical axis I;

[0088] T2 is the thickness of the second lens 2 on the optical axis I;

[0089] T3 is the thickness of the third lens 3 on the optical axis I;

[0090] T4 is the thickness of the fourth lens 4 on the optical axis I;

[0091] T5 is the thickness of the fifth lens 5 on the optical axis I;

[0092] T6 is the thickness of the sixth lens 6 on the optical axis I;

[0093] T7 is the thickness of the seventh lens 7 on the optical axis I;

[0094] G12 is the distance between the image side surface 16 of the first lens 1 and the object side surface 25 of the second lens 2 on the optical axis I, that is, the air gap between the first lens 1 and the second lens 2 on the optical axis I;

[0095] G23 is the distance between the image side surface 26 of the second lens 2 and the object side surface 35 of the third lens 3 on the optical axis I, that is, the air gap between the second lens 2 and the third lens 3 on the optical axis I;

[0096] G34 is the distance between the image side surface 36 of the third lens 3 and the object side surface 45 of the fourth lens 4 on the optical axis I, that is, the air gap between the third lens 3 and the fourth lens 4 on the optical axis I;

[0097] G45 is the distance between the image side surface 46 of the fourth lens 4 and the object side surface 55 of the fifth lens 5 on the optical axis I, that is, the air gap between the fourth lens 4 and the fifth lens 5 on the optical axis I;

[0098] G56 is the distance between the image side surface 56 of the fifth lens 5 and the object side surface 65 of the sixth lens 6 on the optical axis I, that is, the air gap between the fifth lens 5 and the sixth lens 6 on the optical axis I;

[0099] G67 is the distance between the image side surface 66 of the sixth lens 6 and the object side surface 75 of the seventh lens 7 on the optical axis I, that is, the air gap between the sixth lens 6 and the seventh lens 7 on the optical axis I;

[0100] AAG is the sum of six air gaps of the first lens 1 to the seventh lens 7 on the optical axis I, that is, the sum of air gaps G12, G23, G34, G45, G56 and G67;

[0101] ALT is the sum of thicknesses of the seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I, that is, the sum of thicknesses T1, T2, T3, T4, T5, T6 and T7;

[0102] TL is the distance on the optical axis I from the object-side surface 15 of the first lens element 1 to the image-side surface 76 of the seventh lens element 7 .

[0103] TTL is the distance from the object side surface 15 of the first lens 1 to the imaging surface 99 on the optical axis I;

[0104] BFL is the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I;

[0105] EFL is the effective focal length of the optical imaging lens 10;

[0106] ft is the effective focal length of the optical imaging lens 10 in the telephoto mode;

[0107] fw is the effective focal length of the optical imaging lens 10 in the short-focus (wide-angle) mode;

[0108] HFOV is the half viewing angle of the optical imaging lens 10;

[0109] ImgH is the image height of the optical imaging lens 10; and

[0110] Fno is the aperture value of the optical imaging lens 10 .

[0111] In addition, define:

[0112] G7F is the air gap between the seventh lens 7 and the filter 9 on the optical axis I;

[0113] TF is the thickness of the filter 9 on the optical axis I;

[0114] GFP is the air gap between the filter 9 and the imaging surface 99 on the optical axis I;

[0115] Tavg is the average thickness of seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I;

[0116] Tmax is the maximum value of the thickness of seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I;

[0117] Tmin is the minimum value of the thickness of the seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I;

[0118] ΔGmax is the maximum value of the change in the air gap between the first lens 1 to the seventh lens 7 on the optical axis I in the telephoto mode and the short focal mode;

[0119] BFL t is the distance between the image-side surface 76 of the seventh lens element 7 and the imaging surface 99 on the optical axis I when the optical imaging lens 10 is in the telephoto mode, that is, the back focal length of the optical imaging lens 10 in the telephoto mode;

[0120] BFL w is the distance between the image-side surface 76 of the seventh lens element 7 and the imaging surface 99 on the optical axis I when the optical imaging lens 10 is in the short-focus mode, that is, the back focal length of the optical imaging lens 10 in the short-focus mode;

[0121] ΔBFL is the change in back focal length of the optical imaging lens 10 in the long focal mode and the short focal mode;

[0122] AAG tis the sum of six air gaps on the optical axis I of the optical imaging lens 10 in the telephoto mode;

[0123] AAG w is the sum of six air gaps on the optical axis I of the optical imaging lens 10 in the short focal mode;

[0124] ΔAAG is the change in the sum of six air gaps on the optical axis I of the optical imaging lens 10 in the telephoto mode and the short focal mode;

[0125] ΔEFL is the change in the effective focal length of the optical imaging lens 10 in the long focus mode and the short focus mode;

[0126] f1 is the focal length of the first lens 1;

[0127] f2 is the focal length of the second lens 2;

[0128] f3 is the focal length of the third lens 3;

[0129] f4 is the focal length of the fourth lens 4;

[0130] f5 is the focal length of the fifth lens 5;

[0131] f6 is the focal length of the sixth lens 6;

[0132] f7 is the focal length of the seventh lens 7;

[0133] n1 is the refractive index of the first lens 1;

[0134] n2 is the refractive index of the second lens 2;

[0135] n3 is the refractive index of the third lens 3;

[0136] n4 is the refractive index of the fourth lens 4;

[0137] n5 is the refractive index of the fifth lens 5;

[0138] n6 is the refractive index of the sixth lens 6;

[0139] n7 is the refractive index of the seventh lens 7;

[0140] V1 is the Abbe number of the first lens 1, which may also be called the dispersion coefficient;

[0141] V2 is the Abbe number of the second lens 2;

[0142] V3 is the Abbe number of the third lens 3;

[0143] V4 is the Abbe number of the fourth lens 4;

[0144] V5 is the Abbe number of the fifth lens 5;

[0145] V6 is the Abbe number of the sixth lens 6; and

[0146] V7 is the Abbe number of the seventh lens 7.

[0147] Also refer to Figure 7 A to Figure 7 H, Figure 7 A and Figure 7 The diagrams of E respectively illustrate the longitudinal spherical aberration (Longitudinal Spherical Aberration) on the imaging surface 99 of the first embodiment in the long focus mode and the short focus mode when the wavelength is 470nm, 555nm and 650nm, Figure 7 B and Figure 7 The diagrams of F respectively illustrate the field curvature aberration in the sagittal direction on the imaging surface 99 of the first embodiment in the telephoto mode and the short focal mode when the wavelength is 470nm, 555nm and 650nm. Figure 7 C and Figure 7 The diagrams G respectively illustrate the field curvature aberration in the tangential direction on the imaging surface 99 of the first embodiment in the telephoto mode and the short focal mode when the wavelength is 470nm, 555nm and 650nm, Figure 7 D and Figure 7 The diagrams of H respectively illustrate the distortion aberration of the first embodiment on the imaging surface 99 in the long focus mode and the short focus mode when the wavelength is 470nm, 555nm and 650nm. The longitudinal spherical aberration of the first embodiment is as follows: Figure 7 A and Figure 7 As shown in E, the curves formed by each wavelength are very close and close to the middle, indicating that the off-axis light rays of different heights of each wavelength are concentrated near the imaging point. It can be seen from the deflection amplitude of the curve of each wavelength that the imaging point deviation of the off-axis light rays of different heights is controlled within the range of ±0.4 mm. Therefore, the first embodiment does significantly improve the spherical aberration of the same wavelength. In addition, the distances between the three representative wavelengths are also very close to each other, representing that the imaging positions of the light rays of different wavelengths are already very concentrated, thereby significantly improving the chromatic aberration.

[0148] exist Figure 7 B. Figure 7 C. Figure 7 F and Figure 7 Among the four field curvature aberration diagrams of G, the focal length variation of three representative wavelengths in the entire field of view falls within ±0.4 mm, indicating that the optical system of the first embodiment can effectively eliminate aberrations. Figure 7 D and Figure 7 The distortion diagram of H shows that the distortion of the present embodiment is maintained within the range of ±3%, indicating that the distortion of the first embodiment has met the imaging quality requirements of the optical system. This shows that the first embodiment can still provide good imaging quality compared to the existing optical lens, so the first embodiment can have a smaller aperture value, a smaller volume and still have good optical performance at different focal lengths while maintaining good optical performance.

[0149] Fig.10 FIG. 4 is a schematic diagram of an optical imaging lens according to a second embodiment of the present invention. Fig.11 A to Fig.11 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the second embodiment. Fig.10 , a second embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the fourth lens 4 has a positive refractive power. The optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 663 of the image side surface 66 of the sixth lens 6 is a concave surface. It should be noted here that in order to clearly show the drawing, Fig.10 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0150] Detailed optical data of the optical imaging lens 10 of the second embodiment are as follows: Fig.12 As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the second embodiment are 2.884 mm, 2.467 mm, and 1.274 mm, respectively, the optical imaging lens 10 is in short-focus mode, with an effective focal length of 10.459 mm, an aperture value of 2.239, a half viewing angle of 16.679 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 16.038 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 1.661 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the second embodiment are 0.060 mm, 0.472 mm, and 6.100 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 16.309 mm, the aperture value is 3.491, the half viewing angle is 10.636 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 11.219 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 6.487 mm.

[0151] like Fig.13 As shown, Fig.13 Then, each aspheric coefficient in the above formula (1) is obtained from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the second embodiment.

[0152] In addition, the relationship between the important parameters of the optical imaging lens 10 of the second embodiment is as follows: Fig.38 shown.

[0153] The longitudinal spherical aberration of the second embodiment in the long focus mode and the short focus mode is as follows: Fig.11 A and Fig.11 As shown in Figure E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.14 mm. Fig.11 B. Fig.11 C. Fig.11 F and Fig.11 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.14 mm. Fig.11 D and Fig.11 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±2%.

[0154] From the above description, it can be known that the aperture value of the second embodiment is smaller than that of the first embodiment. Therefore, compared with the first embodiment, the second embodiment has more light entering. In addition, the longitudinal spherical aberration of the second embodiment is smaller than that of the first embodiment, the field curvature aberration of the second embodiment is smaller than that of the first embodiment, and the distortion aberration of the second embodiment is smaller than that of the first embodiment.

[0155] Fig.14 FIG. 4 is a schematic diagram of an optical imaging lens according to a third embodiment of the present invention. Fig.15 A to Fig.15 H is a diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment. Fig.14 , a third embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 563 of the image side surface 56 of the fifth lens 5 is a concave surface. The circumferential area 653 of the object side surface 65 of the sixth lens 6 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.14 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0156] Detailed optical data of the optical imaging lens 10 of the third embodiment are as follows: Fig.16 As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the third embodiment are 2.605 mm, 2.486 mm, and 1.056 mm, respectively, the optical imaging lens 10 is in a short-focus mode, with an effective focal length of 8.927 mm, an aperture value of 1.927, a half viewing angle of 19.539 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 14.284 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 1.412 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the third embodiment are 0.866 mm, 0.269 mm, and 5.502 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 13.390 mm, the aperture value is 2.891, the half viewing angle is 12.842 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 10.327 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 5.857 mm.

[0157] like Fig.17 As shown, Fig.17 Then, each aspheric coefficient in the above formula (1) is obtained from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the third embodiment.

[0158] In addition, the relationship between the important parameters of the optical imaging lens 10 of the third embodiment is as follows: Fig.38 shown.

[0159] The longitudinal spherical aberration of the third embodiment in the long focus mode and the short focus mode is as follows: Fig.15 A and Fig.15 As shown in Figure E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.06 mm. Fig.15 B. Fig.15 C. Fig.15 F and Fig.15 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.06 mm. Fig.15 D and Fig.15 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±2.5%.

[0160] It can be known from the above description that the aperture value of the third embodiment is smaller than that of the first embodiment. Therefore, compared with the first embodiment, the third embodiment has more light entering. In addition, the longitudinal spherical aberration of the third embodiment is smaller than that of the first embodiment, the field curvature aberration of the third embodiment is smaller than that of the first embodiment, and the distortion aberration of the third embodiment is smaller than that of the first embodiment.

[0161] Fig.18 FIG. 4 is a schematic diagram of an optical imaging lens according to a fourth embodiment of the present invention. Fig.19 A to Fig.19 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the fourth embodiment. Fig.18 , a fourth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 563 of the image side surface 56 of the fifth lens 5 is a concave surface. The circumferential area 653 of the object side surface 65 of the sixth lens 6 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.18 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0162] Detailed optical data of the optical imaging lens 10 of the fourth embodiment are as follows: Fig. 20 As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the fourth embodiment are 2.727 mm, 2.505 mm, and 1.015 mm, respectively, the optical imaging lens 10 is in short-focus mode, with an effective focal length of 11.029 mm, an aperture value of 2.385, a half viewing angle of 16.466 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 15.368 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging plane 99 on the optical axis I is 1.927 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the fourth embodiment are 0.055 mm, 0.225 mm, and 7.900 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 22.069 mm, the aperture value is 4.771, the half viewing angle is 8.871 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 10.416 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 8.812 mm.

[0163] like Fig.21As shown, Fig.21 Then, each aspheric coefficient in the above formula (1) is obtained from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the fourth embodiment.

[0164] In addition, the relationship between the important parameters of the optical imaging lens 10 of the fourth embodiment is as follows: Fig.38 shown.

[0165] The longitudinal spherical aberration of the fourth embodiment in the long focus mode and the short focus mode is as follows: Fig.19 A and Fig.19 As shown in Figure E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±1.6 mm. Fig.19 B. Fig.19 C. Fig.19 F and Fig.19 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±1.6 mm. Fig.19 D and Fig.19 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±2%.

[0166] From the above description, it can be known that the zoom ratio of the fourth embodiment is greater than that of the first embodiment. Therefore, compared with the first embodiment, the fourth embodiment has a larger photographable focal length range. In addition, the distortion aberration of the fourth embodiment is less than that of the first embodiment.

[0167] Fig. 22 FIG. 4 is a schematic diagram of an optical imaging lens according to a fifth embodiment of the present invention. Fig.23 A to Fig.23 H is a diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens of the fifth embodiment. Fig. 22 , a fifth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 653 of the object side surface 65 of the sixth lens 6 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig. 22 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0168] Detailed optical data of the optical imaging lens 10 of the fifth embodiment are as follows: Fig.24As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the fifth embodiment are 3.187 mm, 2.475 mm, and 1.521 mm, respectively, the optical imaging lens 10 is in short-focus mode, with an effective focal length of 9.740 mm, an aperture value of 2.056, a half viewing angle of 18.251 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 14.698 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 2.044 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the fifth embodiment are 0.093 mm, 0.319 mm, and 6.135 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 14.708 mm, the aperture value is 3.105, the half viewing angle is 11.585 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 9.448 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 6.657 mm.

[0169] like Fig.25 As shown, Fig.25 Then, each aspheric coefficient in the above formula (1) is obtained from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the fifth embodiment.

[0170] In addition, the relationship between the important parameters of the optical imaging lens 10 of the fifth embodiment is as follows: Fig.39 shown.

[0171] The longitudinal spherical aberration of the fifth embodiment in the long focus mode and the short focus mode is as follows: Fig.23 A and Fig.23 As shown in E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.1 mm. Fig.23 B. Fig.23 C. Fig.23 F and Fig.23 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.25 mm. Fig.23 D and Fig.23 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±4%.

[0172] It can be seen from the above description that the aperture value of the fifth embodiment is smaller than that of the first embodiment. Therefore, compared with the first embodiment, the fifth embodiment has more light entering. In addition, the longitudinal spherical aberration of the fifth embodiment is smaller than that of the first embodiment, and the field curvature aberration of the fifth embodiment is smaller than that of the first embodiment.

[0173] Fig.26 FIG. 4 is a schematic diagram of an optical imaging lens according to a sixth embodiment of the present invention. Fig. 27 A to Fig. 27 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the sixth embodiment. Fig.26 , a sixth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 653 of the object side surface 65 of the sixth lens 6 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.26 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0174] Detailed optical data of the optical imaging lens 10 of the sixth embodiment are as follows: Fig.28 As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the sixth embodiment are 3.778 mm, 2.435 mm, and 1.604 mm, respectively, the optical imaging lens 10 is in short-focus mode, with an effective focal length of 10.013 mm, an aperture value of 2.151, a half viewing angle of 17.498 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 15.886 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging plane 99 on the optical axis I is 2.129 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the sixth embodiment are 0.075 mm, 0.441 mm, and 6.242 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 15.673 mm, the aperture value is 3.367, the half viewing angle is 10.966 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 10.190 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 6.767 mm.

[0175] like Fig.29 As shown, Fig.29Then, each aspheric coefficient of each item in the above formula (1) from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the sixth embodiment is given.

[0176] In addition, the relationship between the important parameters of the optical imaging lens 10 of the sixth embodiment is as follows: Fig.39 shown.

[0177] The longitudinal spherical aberration of the sixth embodiment in the long focus mode and the short focus mode is as follows: Fig. 27 A and Fig. 27 As shown in E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.03 mm. Fig. 27 B. Fig. 27 C. Fig. 27 F and Fig. 27 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.06 mm. Fig. 27 D and Fig. 27 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±2.5%.

[0178] It can be known from the above description that the aperture value of the sixth embodiment is smaller than that of the first embodiment. Therefore, compared with the first embodiment, the sixth embodiment has more light entering. In addition, the longitudinal spherical aberration of the sixth embodiment is smaller than that of the first embodiment, the field curvature aberration of the sixth embodiment is smaller than that of the first embodiment, and the distortion aberration of the sixth embodiment is smaller than that of the first embodiment.

[0179] Fig.30 FIG. 4 is a schematic diagram of an optical imaging lens according to a seventh embodiment of the present invention. Fig.31 A to Fig.31 H is a diagram of longitudinal spherical aberration and various aberrations of the optical imaging lens of the seventh embodiment. Fig.30 , a seventh embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between these lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 653 of the object side surface 65 of the sixth lens 6 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.30 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0180] Detailed optical data of the optical imaging lens 10 of the seventh embodiment are as follows: Fig.32As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the seventh embodiment are 1.348 mm, 2.663 mm, and 0.773 mm, respectively, the optical imaging lens 10 is in short-focus mode, with an effective focal length of 10.730 mm, an aperture value of 2.310, a half viewing angle of 16.365 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 15.722 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 1.483 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the seventh embodiment are 1.243 mm, 0.148 mm, and 5.977 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 16.166 mm, the aperture value is 3.480, the half viewing angle is 10.906 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 13.102 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 6.687 mm.

[0181] like Fig.33 As shown, Fig.33 Then, each aspheric coefficient in the above formula (1) is obtained from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the seventh embodiment.

[0182] In addition, the relationship between the important parameters of the optical imaging lens 10 of the seventh embodiment is as follows: Fig.39 shown.

[0183] The longitudinal spherical aberration of the seventh embodiment in the long focus mode and the short focus mode is as follows: Fig.31 A and Fig.31 As shown in Figure E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.06 mm. Fig.31 B. Fig.31 C. Fig.31 F and Fig.31 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.05 mm. Fig.31 D and Fig.31 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±1.8%.

[0184] It can be seen from the above description that the aperture value of the seventh embodiment is smaller than that of the first embodiment. Therefore, compared with the first embodiment, the seventh embodiment has a larger amount of incoming light. In addition, the longitudinal spherical aberration of the seventh embodiment is smaller than that of the first embodiment, the field curvature aberration of the seventh embodiment is smaller than that of the first embodiment, and the distortion aberration of the seventh embodiment is smaller than that of the first embodiment.

[0185] Fig.34 is a schematic diagram of an optical imaging lens according to an eighth embodiment of the present invention. Fig.35 A to Fig.35 H is a diagram of the longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment. Fig.34 , an eighth embodiment of the optical imaging lens 10 of the present invention is substantially similar to the first embodiment, and the differences between the two are as follows: the optical data, aspheric coefficients and parameters between the lenses 1, 2, 3, 4, 5, 6 and 7 are more or less different. In addition, in this embodiment, the optical axis area 561 of the image side surface 56 of the fifth lens 5 is a convex surface. The circumferential area 653 of the object side surface 65 of the sixth lens 6 is a convex surface. It should be noted here that in order to clearly show the drawing, Fig.34 Part of the numbers of the optical axis area and the circumferential area having a surface shape similar to that of the first embodiment are omitted.

[0186] Detailed optical data of the optical imaging lens 10 of the eighth embodiment are as follows: Fig.36 As shown, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the eighth embodiment are 2.028 mm, 2.780 mm, and 0.740 mm, respectively, the optical imaging lens 10 is in short-focus mode, with an effective focal length of 10.273 mm, an aperture value of 2.195, a half viewing angle of 16.963 degrees, and an image height of 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 15.367 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging plane 99 on the optical axis I is 1.450 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 of the eighth embodiment are 0.088 mm, 0.160 mm, and 6.129 mm, respectively, the optical imaging lens 10 is in telephoto mode, and its effective focal length is 15.924 mm, the aperture value is 3.403, the half viewing angle is 10.934 degrees, and the image height is 3.100 mm. In addition, the distance from the object side surface 15 of the first lens 1 to the image side surface 76 of the seventh lens 7 on the optical axis I is 10.807 mm, and the distance from the image side surface 76 of the seventh lens 7 to the imaging surface 99 on the optical axis I is 6.839 mm.

[0187] like Fig.37 As shown, Fig.37Then, they are the aspheric coefficients of the various terms from the object side surface 15 of the first lens element 1 to the image side surface 76 of the seventh lens element 7 in the above formula (1) of the eighth embodiment.

[0188] In addition, the relationship between the important parameters of the optical imaging lens 10 of the eighth embodiment is as follows: Fig.39 shown.

[0189] The longitudinal spherical aberration of the eighth embodiment in the long focus mode and the short focus mode is as follows: Fig.35 A and Fig.35 As shown in Figure E, the imaging point deviation of off-axis light at different heights is controlled within the range of ±0.035 mm. Fig.35 B. Fig.35 C. Fig.35 F and Fig.35 In the four field curvature aberration diagrams of G in telephoto mode and short focal mode, the focal length variation of the three representative wavelengths in the entire field of view falls within ±0.035 mm. Fig.35 D and Fig.35 The distortion diagrams of H in the telephoto mode and the short focal mode show that the distortion of this embodiment is maintained within the range of ±1%.

[0190] It can be known from the above description that the aperture value of the eighth embodiment is smaller than that of the first embodiment. Therefore, compared with the first embodiment, the eighth embodiment has more light entering. In addition, the longitudinal spherical aberration of the eighth embodiment is smaller than that of the first embodiment, the field curvature aberration of the eighth embodiment is smaller than that of the first embodiment, and the distortion aberration of the eighth embodiment is smaller than that of the first embodiment.

[0191] Also refer to Fig.38 and Fig.39 , Fig.38 is a table diagram of various optical parameters of the first to fourth embodiments, Fig.39 1 is a table diagram of various optical parameters of the fifth embodiment to the eighth embodiment. It can be seen from the optical imaging lens 10 of each of the above embodiments that the optical imaging lens 10 of the embodiment of the present invention can obtain the following effects and advantages:

[0192] 1. When the second lens element 2 has a negative refractive power, the third lens element 3 has a positive refractive power, or the seventh lens element 7 has a negative refractive power, the spherical aberration generated by the optical imaging system when the focal length is changed can be reduced. In combination with the circumferential area 453 of the object-side surface 45 of the fourth lens element 4 being convex, the fifth lens element 5 having a positive refractive power, the sixth lens element 6 having a positive refractive power, the optical axis area 761 of the object-side surface 76 of the seventh lens element 7 being convex, and the optical imaging lens element 10 having at least one adjustable air gap on the optical axis I, the volume of the optical imaging lens element 10 can be controlled, and the optical imaging lens element 10 has good optical quality at different focal lengths.

[0193] Second, based on the first point above, if the first lens 1 further satisfies the requirement of having a positive refractive power, it can effectively converge incident light rays of different angles.

[0194] 3. When the circumferential region 453 of the object-side surface 45 of the fourth lens element 4 of the optical imaging lens 10 of the present invention is a convex surface, the edge aberration of the imaging surface 99 can be improved. In addition, when the fifth lens element 5 has a positive refractive power, the sixth lens element 6 has a positive refractive power, the optical axis region 751 of the object-side surface 75 of the seventh lens element 7 is a convex surface, the circumferential region 753 of the object-side surface 75 of the seventh lens element 7 is a concave surface, and the optical imaging lens 10 has at least one adjustable air gap on the optical axis I, the volume of the optical imaging lens 10 can be controlled and the optical imaging lens 10 has good optical quality at different focal lengths.

[0195] Fourth, when the first lens element 1 of the optical imaging lens 10 of the present invention has a positive refractive power, the circumferential region 163 of the image-side surface 16 of the first lens element 1 is a convex surface, and the circumferential region 453 of the object-side surface 45 of the fourth lens element 4 is a convex surface, it can effectively converge incident light rays of different angles and improve the edge aberration of the imaging surface 99. In addition, when the fifth lens element 5 has a positive refractive power, the seventh lens element 7 has a negative refractive power, the optical axis region 761 of the image-side surface 76 of the seventh lens element 7 is a concave surface, and the optical imaging lens 10 has at least one adjustable air gap on the optical axis I, the volume of the optical imaging lens 10 can be controlled and it can have good optical quality at different focal lengths.

[0196] 5. Based on the fourth point above, if the second lens element 2 has a negative refractive power, the third lens element 3 has a positive refractive power, or the sixth lens element 6 has a positive refractive power, the spherical aberration generated by the optical imaging system during focal length change can be reduced.

[0197] 6. When the circumferential area 163 of the image side surface 16 of the first lens 1 of the optical imaging lens 10 of the present invention is convex, the circumferential area 263 of the image side surface 26 of the second lens 2 is concave, and the third lens 3 has a positive refractive power, the edge aberration of the imaging surface 99 can be improved. In combination with the fifth lens 5 having a positive refractive power, the seventh lens 7 having a negative refractive power, the optical axis area 761 of the image side surface 76 of the seventh lens 7 being a concave surface, and the optical imaging lens 10 having at least one adjustable air gap on the optical axis I, the volume of the optical imaging lens 10 can be controlled and the optical imaging lens 10 has good optical quality at different focal lengths. When the first lens 1 has a positive refractive power, the second lens 2 has a negative refractive power, or the sixth lens 6 has a positive refractive power, the spherical aberration generated by the optical imaging system when the focal length is changed can be reduced.

[0198] 7. In the optical imaging lens 10 of the present invention, there is an air gap between two adjacent optical elements (for example, aperture 0 and lens, or lens and lens, or lens and filter 9) on the optical axis I, wherein the number of the air gaps is adjustable, and the number of air gaps is at least one and at most three. Between the first lens 1 to the seventh lens 7, the number of adjustable air gaps is at least one and at most two. By controlling the number of adjustable air gaps, the volume of the entire lens assembly can be reduced to a small size, and the requirements of being thin and short can be easily met while maintaining the assembly yield.

[0199] 8. When the zoom ratio, back focal length, effective focal length and their variation satisfy the following range or proportional relationship, the distortion and field curvature aberration of the optical imaging system can be improved better.

[0200] in,

[0201] The optical imaging lens 10 can meet the EFL≦23.000 mm, and the preferred range is 8.800 mm≦EFL≦23.000 mm;

[0202] The optical imaging lens 10 may meet the requirement of ΔEFL≧4.400 mm, and the preferred range is 4.400 mm≦ΔEFL≦12.000 mm;

[0203] The optical imaging lens 10 may meet ft / fw≧1.450, and the preferred range is 1.450≦ft / fw≦2.100;

[0204] The optical imaging lens 10 may meet ΔEFL / ΔBFL≦1.700, and a preferred range is 1.000≦ΔEFL / ΔBFL≦1.700;

[0205] The optical imaging lens 10 may meet ΔEFL / ΔAAG≦2.300, and a preferred range is 0.900≦ΔEFL / ΔAAG≦2.300;

[0206] The optical imaging lens 10 may meet ΔEFL / ΔGmax≦4.200, and a preferred range is 1.500≦ΔEFL / ΔGmax≦4.200;

[0207] The optical imaging lens 10 may meet TL / BFL≦10.600, and the preferred range is 1.000≦TL / BFL≦10.600;

[0208] The optical imaging lens 10 may meet TTL / (AAG+BFL)≧1.600, and the preferred range is 1.600≦TTL / (AAG+BFL)≦2.450; and

[0209] The optical imaging lens 10 may meet the requirement of (AAG+BFL) / Tavg≦8.900, and a preferred range is 1.300≦(AAG+BFL) / Tavg≦8.900.

[0210] 9. When the lens material meets the following restrictions, the chromatic aberration and spherical aberration generated during the zooming process can be effectively suppressed, so that the optical imaging lens 10 can have good resolution at different focal lengths.

[0211] in,

[0212] The optical imaging lens 10 may meet V1+V2+V6≦125.000, and the preferred range is 76.000≦V1+V2+V6≦125.000;

[0213] The optical imaging lens 10 may meet V1+V3+V4≦125.000, and the preferred range is 95.000≦V1+V3+V4≦125.000; and

[0214] The optical imaging lens 10 may meet the requirement of V2+V5+V6+V7≦180.000, and a preferred range is 150.000≦V2+V5+V6+V7≦180.000.

[0215] 10. To ensure the image quality and take the manufacturing difficulty into consideration, the air gap between the lenses or the lens thickness is appropriately shortened or maintained at a certain ratio. When the numerical limits of the following conditional expressions are met, the embodiments of the present invention can have a better configuration.

[0216] in,

[0217] The optical imaging lens 10 can meet TTL / Tmax≦10.000, and the preferred range is 5.900≦TTL / Tmax≦10.000;

[0218] The optical imaging lens 10 may meet AAG / Tmin≦15.300, and the preferred range is 2.650≦AAG / Tmin≦15.300;

[0219] The optical imaging lens 10 may meet ALT / (T3+G34+T4)≦3.300, and the preferred range is 2.000≦ALT / (T3+G34+T4)≦3.300;

[0220] The optical imaging lens 10 may meet (T1+G12+T2+G23+T3) / T7≦7.700, and the preferred range is 2.500≦(T1+G12+T2+G23+T3) / T7≦7.700;

[0221] The optical imaging lens 10 can meet TTL / (T1+T7)≦9.200, and the preferred range is 6.100≦TTL / (T1+T7)≦9.200;

[0222] The optical imaging lens 10 may meet ALT / (Tmax+Tmin)≧2.800, and the preferred range is 2.800≦ALT / (Tmax+Tmin)≦4.200;

[0223] The optical imaging lens 10 may meet TL / (T5+G56+T6+G67+T7)≦2.900, and the preferred range is 1.700≦TL / (T5+G56+T6+G67+T7)≦2.900;

[0224] The optical imaging lens 10 may meet the requirement of (T6+G67+T7) / (T1+G12+T2)≧1.550, and the preferred range is 1.550≦(T6+G67+T7) / (T1+G12+T2)≦2.650;

[0225] The optical imaging lens 10 can meet TTL / (T4+G45+T5)≦8.800, and the preferred range is 4.000≦TTL / (T4+G45+T5)≦8.800;

[0226] The optical imaging lens 10 can meet Tmax / Tmin≦6.000, and the preferred range is 3.500≦Tmax / Tmin≦6.000;

[0227] The optical imaging lens 10 may meet the condition that (T3+T6) / (T1+T2)≧1.600, and the preferred range is 1.600≦(T3+T6) / (T1+T2)≦4.000; and

[0228] The optical imaging lens 10 may meet the requirement of (T3+G34+T4+G45+T5) / (T1+G12+T2)≧2.300, and a preferred range is 2.300≦(T3+G34+T4+G45+T5) / (T1+G12+T2)≦4.800.

[0229] In addition, any combination of parameters of the embodiment may be selected to increase lens restrictions, so as to facilitate the lens design of the same architecture of the present invention.

[0230] In view of the unpredictability of optical system design, under the framework of the present invention, the above conditions can be met to better shorten the length of the lens system of the present invention, increase the available aperture, improve the image quality, or improve the assembly yield to improve the shortcomings of the previous technology. The lens of the embodiment of the present invention uses plastic material to reduce the weight of the lens and save costs.

[0231] The contents disclosed in each embodiment of the present invention include but are not limited to optical parameters such as focal length, lens thickness, and Abbe number. For example, the present invention discloses an optical parameter A and an optical parameter B in each embodiment, wherein the ranges covered by these optical parameters, the comparison relationship between the optical parameters, and the conditional ranges covered by multiple embodiments are specifically explained as follows:

[0232] (1) The range covered by the optical parameter, for example: α2≦A≦α1 or β2≦B≦β1, α1 is the maximum value of the optical parameter A in multiple embodiments, α2 is the minimum value of the optical parameter A in multiple embodiments, β1 is the maximum value of the optical parameter B in multiple embodiments, and β2 is the minimum value of the optical parameter B in multiple embodiments.

[0233] (2) The comparative relationship between optical parameters, for example: A is greater than B or A is less than B.

[0234] (3) The conditional range covered by multiple embodiments, specifically, the combination relationship or proportional relationship obtained by possible calculation of multiple optical parameters of the same embodiment, these relationships are defined as E. E can be, for example: A+B or AB or A / B or A*B or (A*B) 1 / 2 , and E satisfies the conditional formula E≦γ1 or E≧γ2 or γ2≦E≦γ1, γ1 and γ2 are the values ​​obtained by calculating the optical parameters A and the optical parameters B of the same embodiment, and γ1 is the maximum value among multiple embodiments of the present invention, and γ2 is the minimum value among multiple embodiments of the present invention.

[0235] The ranges covered by the above optical parameters, the comparison relationship between the optical parameters, and the maximum value, minimum value, and numerical range within the maximum value and minimum value of the conditional expressions are all features that can be implemented by the present invention, and all belong to the scope disclosed by the present invention. The above is only an example and should not be limited to this.

[0236] All embodiments of the present invention can be implemented, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, the feature combination can also achieve unexpected effects of the present case. The feature combination includes but is not limited to the combination of features such as face shape, refractive index and conditional formula. The disclosure of the embodiments of the present invention is a specific embodiment to illustrate the principles of the present invention, and the present invention should not be limited to the disclosed embodiments. In other words, the embodiments and their drawings are only for demonstration of the present invention and are not limited thereto.

[0237] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Any person having ordinary knowledge in the technical field may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims

1. An optical imaging lens with adjustable air gap, comprising a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence along an optical axis from an object side to an image side, and each of the first to seventh lenses comprises an object-side surface facing the object side and allowing imaging light to pass therethrough, and an image-side surface facing the image side and allowing imaging light to pass therethrough; characterized in that: The first lens has a positive refractive power, an optical axis region of the object side surface of the first lens is a convex surface, a circumferential region of the object side surface of the first lens is a concave surface, an optical axis region of the image side surface of the first lens is a convex surface, and a circumferential region of the image side surface of the first lens is a convex surface; The second lens has a negative refractive power, an optical axis region of the object side surface of the second lens is a convex surface, a circumferential region of the object side surface of the second lens is a convex surface, an optical axis region of the image side surface of the second lens is a concave surface, and a circumferential region of the image side surface of the second lens is a concave surface; The third lens has a positive refractive power, an optical axis region of the object side surface of the third lens is a convex surface, a circumferential region of the object side surface of the third lens is a convex surface, an optical axis region of the image side surface of the third lens is a convex surface, and a circumferential region of the image side surface of the third lens is a convex surface; A circumferential area of ​​the object side surface of the fourth lens is a convex surface, an optical axis area of ​​the object side surface of the fourth lens is a concave surface, an optical axis area of ​​the image side surface of the fourth lens is a concave surface, and a circumferential area of ​​the image side surface of the fourth lens is a concave surface; The fifth lens has a positive refractive power, an optical axis region of the object-side surface of the fifth lens is a convex surface, and a circumferential region of the object-side surface of the fifth lens is a convex surface; The sixth lens has a positive refractive power, an optical axis region of the object side surface of the sixth lens is a concave surface, and an optical axis region of the image side surface of the sixth lens is a convex surface; The seventh lens has a negative refractive power, an optical axis region of the object side surface of the seventh lens is a convex surface, a circumferential region of the object side surface of the seventh lens is a concave surface, an optical axis region of the image side surface of the seventh lens is a concave surface, and a circumferential region of the image side surface of the seventh lens is a concave surface; and The optical imaging lens has only the seven lenses mentioned above, the optical imaging lens has at least one adjustable air gap, and the optical imaging lens satisfies the following formula: ΔEFL / ΔBFL≦1.700, wherein ΔEFL is the change in effective focal length of the optical imaging lens in telephoto mode and short focal mode, and ΔBFL is the change in back focal length of the optical imaging lens in telephoto mode and short focal mode.

2. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: V1+V2+V6≦125.000, wherein V1 is the Abbe number of the first lens, V2 is the Abbe number of the second lens, and V6 is the Abbe number of the sixth lens.

3. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: TTL / Tmax≦10.000, wherein TTL is the distance from the object side of the first lens to an imaging plane on the optical axis, and Tmax is the maximum value of the thicknesses of seven lenses from the first lens to the seventh lens on the optical axis.

4. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: AAG / Tmin≦15.300, wherein AAG is the sum of six air gaps of the first lens to the seventh lens on the optical axis, and Tmin is the minimum value of the seven lens thicknesses of the first lens to the seventh lens on the optical axis.

5. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: ALT / (T3+G34+T4)≦3.300, wherein ALT is the sum of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis, T3 is the thickness of the third lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, and T4 is the thickness of the fourth lens on the optical axis.

6. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: (T1+G12+T2+G23+T3) / T7≦7.700, wherein T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, T2 is the thickness of the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, T3 is the thickness of the third lens on the optical axis, and T7 is the thickness of the seventh lens on the optical axis.

7. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: TL / BFL≦10.600, wherein TL is the distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, and BFL is the distance from the image side surface of the seventh lens to an imaging plane on the optical axis.

8. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: V1+V3+V4≦125.000, wherein V1 is the Abbe number of the first lens, V3 is the Abbe number of the third lens, and V4 is the Abbe number of the fourth lens.

9. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: TTL / (T1+T7)≦9.200, wherein TTL is a distance from the object side of the first lens to an imaging surface on the optical axis, T1 is a thickness of the first lens on the optical axis, and T7 is a thickness of the seventh lens on the optical axis.

10. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: ALT / (Tmax+Tmin)≧2.800, wherein ALT is the sum of the thicknesses of seven lenses from the first lens to the seventh lens on the optical axis, Tmax is the maximum value of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis, and Tmin is the minimum value of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis.

11. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: TL / (T5+G56+T6+G67+T7)≦2.900, wherein TL is a distance from the object side surface of the first lens to the image side surface of the seventh lens on the optical axis, T5 is a thickness of the fifth lens on the optical axis, G56 is an air gap between the fifth lens and the sixth lens on the optical axis, T6 is a thickness of the sixth lens on the optical axis, G67 is an air gap between the sixth lens and the seventh lens on the optical axis, and T7 is a thickness of the seventh lens on the optical axis.

12. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: (T6+G67+T7) / (T1+G12+T2)≧1.550, wherein T6 is the thickness of the sixth lens on the optical axis, G67 is the air gap between the sixth lens and the seventh lens on the optical axis, T7 is the thickness of the seventh lens on the optical axis, T1 is the thickness of the first lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, and T2 is the thickness of the second lens on the optical axis.

13. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: TTL / (AAG+BFL)≧1.600, wherein TTL is a distance from the object side surface of the first lens to an imaging plane on the optical axis, AAG is a sum of six air gaps from the first lens to the seventh lens on the optical axis, and BFL is a distance from the image side surface of the seventh lens to an imaging plane on the optical axis.

14. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: V2+V5+V6+V7≦180.000, wherein V2 is the Abbe number of the second lens, V5 is the Abbe number of the fifth lens, V6 is the Abbe number of the sixth lens, and V7 is the Abbe number of the seventh lens.

15. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: TTL / (T4+G45+T5)≦8.800, wherein TTL is a distance from the object side surface of the first lens to an imaging surface on the optical axis, T4 is a thickness of the fourth lens on the optical axis, G45 is an air gap between the fourth lens and the fifth lens on the optical axis, and T5 is a thickness of the fifth lens on the optical axis.

16. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following formula: Tmax / Tmin≦6.000, wherein Tmax is the maximum value of the thickness of the seven lenses from the first lens to the seventh lens on the optical axis, and Tmin is the minimum value of the thickness of the seven lenses from the first lens to the seventh lens on the optical axis.

17. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: (AAG+BFL) / Tavg≦8.900, wherein AAG is the sum of six air gaps from the first lens to the seventh lens on the optical axis, BFL is the distance from the image side surface of the seventh lens to an imaging surface on the optical axis, and Tavg is the average value of the seven lens thicknesses from the first lens to the seventh lens on the optical axis.

18. The optical imaging lens according to claim 1, wherein: The optical imaging lens satisfies the following equation: (T3+T6) / (T1+T2)≧1.600, wherein T3 is the thickness of the third lens on the optical axis, T6 is the thickness of the sixth lens on the optical axis, T1 is the thickness of the first lens on the optical axis, and T2 is the thickness of the second lens on the optical axis.

Images