Optical imaging lens

Abstract

An optical imaging lens comprises, from the object side to the image side, sequentially along the optical axis a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The first lens has positive refractive index. The circumferential region of the object-side surface of the fourth lens is convex. The fifth lens has positive refractive index. The sixth lens has positive refractive index. The optical axis region of the object-side surface of the seventh lens is convex. The optical imaging lens comprises only seven lenses and has at least one adjustable air gap.

Description

Technical Field

[0001] This invention relates to an optical element, and more particularly to an optical imaging lens. Prior Technology

[0002] In recent years, optical imaging lenses have continuously evolved, with applications becoming increasingly diverse. Besides requiring lenses to be lightweight and compact, smaller aperture values ​​(Fno) are beneficial for increasing light throughput, and larger field of view is also becoming a trend. Furthermore, the demand for recording with portable electronic devices is growing, and optical zoom using a single zoom lens or digital zoom using multiple prime lenses can meet various shooting needs. However, shooting systems composed of multiple prime lenses not only occupy considerable space when multiple lenses are arranged, but also may cause discontinuities in image resolution or field of view when adjusting focus during recording due to the different lenses. Therefore, designing an optical imaging lens that is both lightweight and compact while also providing zoom capabilities has become a pressing issue. Summary of the Invention

[0003] This invention provides an optical imaging lens with a small aperture value, small size and excellent optical performance.

[0004] This invention provides an optical imaging lens, comprising, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The second lens has a negative refractive index, or the third lens has a positive refractive index. The circumferential region of the object-side surface of the fourth lens is convex. The fifth lens has a positive refractive index. The sixth lens has a positive refractive index. The optical axis region of the object-side surface of the seventh lens is convex. The optical imaging lens comprises only these seven lenses and has at least one adjustable air gap.

[0005] The present invention also provides an optical imaging lens, comprising, from the object side to the image side, sequentially along the optical axis a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The circumferential region of the object-side surface of the fourth lens is convex. The fifth lens has a positive refractive index. The sixth lens has a positive refractive index. The optical axis region of the object-side surface of the seventh lens is convex, and the circumferential region of the object-side surface of the seventh lens is concave. The optical imaging lens comprises only the aforementioned seven lenses and has at least one adjustable air gap.

[0006] The present invention also provides an optical imaging lens, comprising, from the object side to the image side, sequentially along the optical axis a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens. Each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The first lens has a positive refractive index, and the circumferential region of its image-side surface is convex. The circumferential region of the fourth lens's object-side surface is convex. The fifth lens has a positive refractive index. The seventh lens has a negative refractive index, and the optical axis region of its image-side surface is concave. The optical imaging lens comprises only the aforementioned seven lenses and has at least one adjustable air gap.

[0007] The present invention also provides an optical imaging lens, comprising, from the object side to the image side along the optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes. The circumferential region of the image-side surface of the first lens is convex. The circumferential region of the image-side surface of the second lens is concave. The third lens has a positive refractive index. The fifth lens has a positive refractive index. The seventh lens has a negative refractive index. The optical axis region of the image-side surface of the seventh lens is concave. The optical imaging lens has at least an adjustable air gap, and the first lens has a positive refractive index, or the second lens has a negative refractive index, or the sixth lens has a positive refractive index.

[0008] Based on the above, the beneficial effects of the optical imaging lens of the embodiment of the present invention are as follows: by satisfying the above-mentioned concave and convex surface arrangement design of the lens, the refractive index condition and the adjustable air gap design, the optical imaging lens has a small aperture value, a small volume and still has good optical performance at different focal lengths.

[0009] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings for detailed explanation. Simple Explanation of the Diagram

[0010] Figure 1 is a schematic diagram illustrating the surface structure of a lens. Figure 2 is a schematic diagram illustrating the concave and convex structure of a lens and the intersection of light rays. Figure 3 is a schematic diagram illustrating the surface structure of a lens in Example 1. Figure 4 is a schematic diagram illustrating the surface structure of a lens in Example 2. Figure 5 is a schematic diagram illustrating the surface structure of a lens in Example 3. Figure 6 is a schematic diagram of the optical imaging lens of the first embodiment of the present invention. Figures 7A to 7H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment. Figure 8 shows detailed optical data of the optical imaging lens of the first embodiment of the present invention. Figure 9 shows the aspherical parameters of the optical imaging lens of the first embodiment of the present invention. Figure 10 is a schematic diagram of the optical imaging lens of the second embodiment of the present invention. Figures 11A to 11H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the second embodiment. Figure 12 shows detailed optical data of the optical imaging lens of the second embodiment of the present invention. Figure 13 shows the aspherical parameters of the optical imaging lens of the second embodiment of the present invention. Figure 14 is a schematic diagram of the optical imaging lens of the third embodiment of the present invention. Figures 15A to 15H show the longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment. Figure 16 shows detailed optical data of the optical imaging lens of the third embodiment of the present invention. Figure 17 shows the aspherical parameters of the optical imaging lens of the third embodiment of the present invention. Figure 18 is a schematic diagram of the optical imaging lens of the fourth embodiment of the present invention. Figures 19A to 19H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the fourth embodiment. Figure 20 shows detailed optical data of the optical imaging lens of the fourth embodiment of the present invention. Figure 21 shows the aspherical parameters of the optical imaging lens of the fourth embodiment of the present invention. Figure 22 is a schematic diagram of the optical imaging lens of the fifth embodiment of the present invention. Figures 23A to 23H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the fifth embodiment. Figure 24 shows detailed optical data of the optical imaging lens of the fifth embodiment of the present invention. Figure 25 shows the aspherical parameters of the optical imaging lens of the fifth embodiment of the present invention. Figure 26 is a schematic diagram of the optical imaging lens of the sixth embodiment of the present invention. Figures 27A to 27H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the sixth embodiment. Figure 28 shows detailed optical data of the optical imaging lens of the sixth embodiment of the present invention. Figure 29 shows the aspherical parameters of the optical imaging lens of the sixth embodiment of the present invention. Figure 30 is a schematic diagram of the optical imaging lens of the seventh embodiment of the present invention. Figures 31A to 31H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the seventh embodiment. Figure 32 shows detailed optical data of the optical imaging lens of the seventh embodiment of the present invention. Figure 33 shows the aspherical parameters of the optical imaging lens of the seventh embodiment of the present invention. Figure 34 is a schematic diagram of the optical imaging lens of the eighth embodiment of the present invention. Figures 35A to 35H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment. Figure 36 shows detailed optical data of the optical imaging lens of the eighth embodiment of the present invention. Figure 37 shows the aspherical parameters of the optical imaging lens of the eighth embodiment of the present invention. Figure 38 shows the numerical values ​​of the relationships between various important parameters of the optical imaging lenses of the first to fourth embodiments of the present invention. Figure 39 shows the numerical values ​​of the relationships between the important parameters of the optical imaging lenses of the fifth to eighth embodiments of the present invention. Implementation

[0011] 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.

[0012] The optical system described in this specification includes at least one lens that receives imaging rays incident on the optical system, ranging from parallel to the optical axis to within a half-angle of view (HFOV) relative to the optical axis. The imaging rays are imaged on an imaging plane by the optical system. The statement "a lens has a positive refractive index (or a negative refractive index)" means that the paraxial refractive index of the lens, calculated using Gaussian optics theory, is positive (or negative). The statement "object-side (or image-side) of the lens" is defined as the specific range through which the imaging rays pass on the lens surface. The imaging rays include at least two types of rays: the chief ray (Lc) and the marginal ray (Lm) (as shown in Figure 1). The object-side (or image-side) of the lens can be divided into different regions depending on its location, including the optical axis region, the circumferential region, or one or more relay regions in some embodiments, which will be described in detail below.

[0013] Figure 1 is a radial sectional view of lens 100. Two reference points are defined on the surface of lens 100: a center point and a transition point. The center point of the lens surface is an intersection of the surface with the optical axis I. As illustrated in Figure 1, the first center point CP1 is located on the object-side surface 110 of lens 100, and the second center point CP2 is located on the image-side surface 120 of lens 100. A transition point is a point on the lens surface whose tangent is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the outermost radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All transition points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, the surface of lens 100 may have no transition points or at least one transition point. If a single lens surface has multiple transition points, these transition points are named sequentially from the first transition point in the radially outward direction. For example, the first transition point TP1 (closest to the optical axis I), the second transition point TP2 (as shown in Figure 4), and the Nth transition point (farthest from the optical axis I).

[0014] When the lens surface has at least one transition point, the area from the center point to the first transition point TP1 is defined as the optical axis region, which includes the center point. The area radially outward from the transition point farthest from optical axis I (the Nth transition point) to the optical boundary OB is defined as the circumferential region. In some embodiments, a relay region may be included between the optical axis region and the circumferential region; the number of relay regions depends on the number of transition points. When the lens surface does not have a transition point, 0% to 50% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the optical axis region, and 50% to 100% of the distance from optical axis I to the optical boundary OB of the lens surface is defined as the circumferential region.

[0015] When a ray parallel to optical axis I passes through a region, if the ray bends towards optical axis I and the intersection point with optical axis I is located on the image side A2 of the lens, then that region is a convex surface. When a ray parallel to optical axis I passes through a region, if the extension of the ray intersects optical axis I at the object side A1 of the lens, then that region is a concave surface.

[0016] In addition, referring to Figure 1, lens 100 may also include an assembly portion 130 extending radially outward from optical boundary OB. Assembly portion 130 is generally used for assembling lens 100 to a corresponding element (not shown) in an optical system. Imaging rays do not reach assembly portion 130. The structure and shape of assembly portion 130 are merely illustrative examples of the invention and are not intended to limit the scope of the invention. Assembly portion 130 of the lens discussed below may be partially or entirely omitted in the figures.

[0017] Referring to Figure 2, the region between the center point CP and the first conversion point TP1 is defined as the optical axis region Z1. The region between the first conversion point TP1 and the optical boundary OB of the lens surface is defined as the circumferential region Z2. As shown in Figure 2, after passing through the optical axis region Z1, the parallel ray 211 intersects the optical axis I on the image side A2 of the lens 200, meaning the focal point of the parallel ray 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the ray intersects the optical axis I on the image side A2 of the lens 200, the optical axis region Z1 is convex. Conversely, the parallel ray 212 diverges after passing through the circumferential region Z2. As shown in Figure 2, the extension line EL of the parallel ray 212 after passing through the circumferential region Z2 intersects the optical axis I on the object side A1 of the lens 200, meaning the focal point of the parallel ray 212 passing through the circumferential region Z2 is located at point M on the object side A1 of the lens 200. Since the extension line EL of the light ray intersects the optical axis I at the object side A1 of the lens 200, the circumferential region Z2 is concave. In the lens 200 shown in Figure 2, the first conversion point TP1 is the boundary between the optical axis region and the circumferential region, that is, the first conversion point TP1 is the boundary point between the convex surface and the concave surface.

[0018] On the other hand, the convexity / concavity of the optical axis region can also be determined using the method commonly used by those knowledgeable in the field: judging the convexity / concavity of the lens's optical axis region by the sign of the paraxial radius of curvature (R value). The R value is commonly used in optical design software, such as Zemax or CodeV. It is also frequently found in lens data sheets within optical design software. For the object-side, a positive R value indicates a convex optical axis region, while a negative R value indicates a concave optical axis region. Conversely, for the image-side, a positive R value indicates a concave optical axis region, while a negative R value indicates a convex optical axis region. This method yields results consistent with the aforementioned method using the intersection of a ray / ray extension with the optical axis, where the focal point of a ray parallel to the optical axis is located on either the object-side or image-side of the lens to determine the convexity / concavity. The terms "a region is convex (or concave)," "a region is convex (or concave)," or "a convex (or concave) region" used in this specification may be used interchangeably.

[0019] Figures 3 to 5 provide examples of determining the surface shape and region boundaries of the lens region in various situations, including the aforementioned optical axis region, circumferential region, and relay region.

[0020] Figure 3 is a radial sectional view of lens 300. Referring to Figure 3, the image-side surface 320 of lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis region Z1 and the circumferential region Z2 of the image-side surface 320 of lens 300 are shown in Figure 3. The R value of this image-side surface 320 is positive (i.e., R>0), therefore, the optical axis region Z1 is concave.

[0021] Generally, the surface shape of each region bounded by the transition point will be opposite to that of the adjacent region. Therefore, the transition point can be used to define the change in surface shape, that is, from the transition point, the surface changes from concave to convex or from convex to concave. In Figure 3, since the optical axis region Z1 is concave, and the surface shape changes at the transition point TP1, the circumferential region Z2 is convex.

[0022] Figure 4 is a radial sectional view of lens 400. Referring to Figure 4, the object-side surface 410 of lens 400 has a first conversion point TP1 and a second conversion point TP2. The area between the optical axis I and the first conversion point TP1 is defined as the optical axis region Z1 of the object-side surface 410. The R value of this object-side surface 410 is positive (i.e., R>0), therefore, the optical axis region Z1 is a convex surface.

[0023] The area between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circular region Z2, which is also a convex surface. In addition, the area between the first conversion point TP1 and the second conversion point TP2 is defined as a relay region Z3, which is also a concave surface. Referring again to Figure 4, the object side surface 410, radially outward from the optical axis I, sequentially includes the optical axis region Z1 between the optical axis I and the first conversion point TP1, the relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and the circular 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 convex, and its surface shape changes from the first conversion point TP1 to concave, the relay region Z3 is concave. Furthermore, its surface shape changes back to convex from the second conversion point TP2, so the circular region Z2 is convex.

[0024] Figure 5 is a radial sectional view of lens 500. The object-side surface 510 of lens 500 has no transition point. For a lens surface without a transition point, such as the object-side surface 510 of lens 500, the optical axis region is defined as 0% to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface, and the circumferential region is defined as 50% to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface. Referring to the lens 500 shown in Figure 5, the optical axis region Z1 of the object-side surface 510 is defined as 50% of the distance from the optical axis I to the optical boundary OB of the lens surface. The R value of this object-side surface 510 is positive (i.e., R > 0), therefore, the optical axis region Z1 is convex. Since the object-side surface 510 of lens 500 has no transition point, the circumferential region Z2 of the object-side surface 510 is also convex. Lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0025] Figure 6 is a schematic diagram of the optical imaging lens of the first embodiment of the present invention. Figures 7A to 7H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment. Referring to Figure 6, the optical imaging lens 10 of the first embodiment of the present invention includes, in sequence along an optical axis I of the optical imaging lens 10 from the object side A1 to the image side A2, 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. When light emitted from 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 76 of the seventh lens 7 and the image plane 99. It should be noted that the object side A1 is the side facing the object to be photographed, while the image side A2 is the side facing the image plane 99. In this embodiment, filter 9 is an infrared cut filter.

[0026] In this embodiment, the first lens 1, second lens 2, third lens 3, fourth lens 4, fifth lens 5, sixth lens 6, seventh lens 7, and 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 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 imaging light to pass through. In this embodiment, the aperture 0 is positioned between the second lens 2 and the third lens 3.

[0027] The first lens 1 has a positive refractive index. The optical axis region 151 of the object-side surface 15 of the first lens 1 is convex, and its circumferential region 153 is concave. The optical axis region 161 of the image-side surface 16 of the first lens 1 is convex, and its circumferential region 163 is convex. In this embodiment, both the object-side surface 15 and the image-side surface 16 of the first lens 1 are aspherical surfaces, but the present invention is not limited thereto.

[0028] The second lens 2 has a negative refractive index. The optical axis region 251 of the object-side surface 25 of the second lens 2 is convex, and its circumferential region 253 is also convex. The optical axis region 261 of the image-side surface 26 of the second lens 2 is concave, and its circumferential region 263 is also concave. In this embodiment, both the object-side surface 25 and the image-side surface 26 of the second lens 2 are aspherical, but the present invention is not limited thereto.

[0029] The third lens 3 has a positive refractive index. The optical axis region 351 of the object-side surface 35 of the third lens 3 is convex, and its circumferential region 353 is also convex. The optical axis region 361 of the image-side surface 36 of the third lens 3 is convex, and its circumferential region 363 is also convex. In this embodiment, both the object-side surface 35 and the image-side surface 36 of the third lens 3 are aspherical, but the present invention is not limited thereto.

[0030] The fourth lens 4 has a negative refractive index. The optical axis region 451 of the object-side surface 45 of the fourth lens 4 is concave, and its circumferential region 453 is convex. The optical axis region 461 of the image-side surface 46 of the fourth lens 4 is concave, and its circumferential region 463 is concave. In this embodiment, both the object-side surface 45 and the image-side surface 46 of the fourth lens 4 are aspherical, but the invention is not limited thereto.

[0031] The fifth lens 5 has a positive refractive index. The optical axis region 551 of the object-side surface 55 of the fifth lens 5 is convex, and its circumferential region 553 is also convex. The optical axis region 561 of the image-side surface 56 of the fifth lens 5 is concave, and its circumferential region 563 is also convex. In this embodiment, both the object-side surface 55 and the image-side surface 56 of the fifth lens 5 are aspherical, but the invention is not limited thereto.

[0032] The sixth lens 6 has a positive refractive index. The optical axis region 651 of the object-side surface 65 of the sixth lens 6 is concave, and its circumferential region 653 is also concave. The optical axis region 661 of the image-side surface 66 of the sixth lens 6 is convex, and its circumferential region 663 is also convex. In this embodiment, both the object-side surface 65 and the image-side surface 66 of the sixth lens 6 are aspherical, but the invention is not limited thereto.

[0033] The seventh lens 7 has a negative refractive index. The optical axis region 751 of the object-side surface 75 of the seventh lens 7 is convex, and its circumferential region 753 is concave. The optical axis region 761 of the image-side surface 76 of the seventh lens 7 is concave, and its circumferential region 763 is concave. In this embodiment, both the object-side surface 75 and the image-side surface 76 of the seventh lens 7 are aspherical, but the invention is not limited thereto.

[0034] In this embodiment, the optical imaging lens 10 has only the seven lenses mentioned above. Furthermore, 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, a clear image can be formed within an effective focal length (EFL) range of 13.959 mm to 20.898 mm.

[0035] Other detailed optical data of the first embodiment are shown in Figure 8. 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 short focal length (wide-angle) mode, with an effective focal length of 13.959 mm, an aperture value (F-number, Fno) of 3.021, a half field of view (HFOV) of 12.831 degrees, and an image height of 3.100 mm. In addition, the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 (TL in Figure 8) is 18.442 mm, and the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 (BFL in Figure 8) is 2.825 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the first embodiment are 0.071 mm, 0.908 mm, and 6.778 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 20.898 mm, an aperture of 4.524, a half-angle of 8.477 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 12.981 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 7.686 mm.

[0036] Furthermore, 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, second lens 2, third lens 3, fourth lens 4, fifth lens 5, sixth lens 6 and seventh lens 7, totaling fourteen surfaces, are aspherical. Among them, 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-order aspherical surfaces. These aspherical surfaces are defined according to the following formula (1): (1) in: R: Radius of curvature of the lens surface near the optical axis I; Z: Depth of the aspherical surface (the perpendicular distance between a point on the aspherical surface at a distance Y from the optical axis I and the tangent plane at the vertex on the optical axis I of the aspherical surface); Y: The perpendicular distance between a point on the aspherical curve and the optical axis I; K: Conic constant; ai: The i-th order aspherical coefficient.

[0037] The aspherical coefficients of 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 shown in Figure 9. In Figure 9, column number 15 indicates the aspherical coefficient of the object-side surface 15 of the first lens 1, and so on for the other columns. In this embodiment and the following embodiments, the second-order aspherical coefficient a2 is always 0.

[0038] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the first embodiment is shown in Figure 38. in, T1 is the thickness of the first lens 1 on the optical axis I; T2 is the thickness of the second lens 2 on the optical axis I; T3 is the thickness of the third lens 3 on the optical axis I; T4 is the thickness of the fourth lens 4 on optical axis I; T5 is the thickness of the fifth lens 5 on optical axis I; T6 is the thickness of the sixth lens 6 on optical axis I; T7 is the thickness of the seventh lens 7 on optical axis I; G12 is the distance on the optical axis I from the image side 16 of the first lens 1 to the object side 25 of the second lens 2, that is, the air gap between the first lens 1 and the second lens 2 on the optical axis I; G23 is the distance on optical axis I from the image side 26 of the second lens 2 to the object side 35 of the third lens 3, that is, the air gap between the second lens 2 and the third lens 3 on optical axis I; G34 is the distance on optical axis I from the image side surface 36 of the third lens 3 to the object side surface 45 of the fourth lens 4, that is, the air gap between the third lens 3 and the fourth lens 4 on optical axis I; G45 is the distance on optical axis I from the image side 46 of the fourth lens 4 to the object side 55 of the fifth lens 5, that is, the air gap between the fourth lens 4 and the fifth lens 5 on optical axis I; G56 is the distance on optical axis I from the image side 56 of the fifth lens 5 to the object side 65 of the sixth lens 6, that is, the air gap between the fifth lens 5 and the sixth lens 6 on optical axis I; G67 is the distance on optical axis I from the image side 66 of the sixth lens 6 to the object side 75 of the seventh lens 7, that is, the air gap between the sixth lens 6 and the seventh lens 7 on optical axis I; AAG is the sum of the six air gaps on optical axis I from the first lens 1 to the seventh lens 7, namely the sum of air gaps G12, G23, G34, G45, G56 and G67; ALT is the sum of the thicknesses of the seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I, namely the sum of thicknesses T1, T2, T3, T4, T5, T6 and T7; TL is the distance on optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7. TTL is the distance on optical axis I from the object surface 15 to the imaging surface 99 of the first lens 1. BFL is the distance on optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging surface 99; EFL is the effective focal length of the optical imaging lens 10; ft is the effective focal length of the optical imaging lens 10 in telephoto mode; fw is the effective focal length of the optical imaging lens 10 in short focal length (wide angle) mode; HFOV is half the field of view of the optical imaging lens 10; ImgH is the image height of the optical imaging lens 10; and Fno is the aperture value of the optical imaging lens 10. Furthermore, redefine: G7F is the air gap between the seventh lens 7 and the filter 9 on the optical axis I; TF is the thickness of filter 9 along optical axis I; GFP represents the air gap between filter 9 and imaging surface 99 on optical axis I. Tavg is the average thickness of the seven lenses, from the first lens 1 to the seventh lens 7, along the optical axis I; Tmax is the maximum thickness of the seven lenses, from the first lens 1 to the seventh lens 7, along the optical axis I; Tmin is the minimum thickness of the seven lenses, from the first lens 1 to the seventh lens 7, along the optical axis I; ΔGmax is the maximum value of the change in air gap along optical axis I between the first lens 1 and the seventh lens 7 in telephoto and short-focal-length modes; BFLt is the distance on optical axis I from the image side 76 of the seventh lens 7 to the image plane 99 when the optical imaging lens 10 is in telephoto mode, that is, the back focal length of the optical imaging lens 10 in telephoto mode; BFLw is the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 when the optical imaging lens 10 is in short focal length mode; that is, the back focal length of the optical imaging lens 10 in short focal length mode. ΔBFL represents the change in back focal length of the optical imaging lens 10 in telephoto and focal length modes; AAGt is the sum of the six air gaps on the optical axis I of the optical imaging lens 10 in telephoto mode; AAGw is the sum of the six air gaps on optical axis I of the optical imaging lens 10 in short focal length mode; ΔAAG is the sum of the changes in the six air gaps along the optical axis I of the optical imaging lens 10 in telephoto and focal length modes; ΔEFL is the change in effective focal length of the optical imaging lens 10 in telephoto and focal length modes; f1 is the focal length of the first lens 1; f2 is the focal length of the second lens 2; f3 is the focal length of the third lens 3; f4 is the focal length of the fourth lens 4; f5 is the focal length of the fifth lens 5; f6 is the focal length of the sixth lens 6; f7 is the focal length of the seventh lens 7; n1 is the refractive index of the first lens 1; n2 is the refractive index of the second lens 2; n3 is the refractive index of the third lens 3; n4 is the refractive index of the fourth lens 4; n5 is the refractive index of the fifth lens 5; n6 is the refractive index of the sixth lens 6; n7 is the refractive index of the seventh lens 7; V1 is the Abbe number of the first lens 1. The Abbe number can also be called the dispersion coefficient. V2 is the Abbe number of the second lens 2; V3 is the Abbe number of the third lens 3; V4 is the Abbe number of the fourth lens 4; V5 is the Abbe number of the fifth lens 5; V6 is the Abbe number of the sixth lens 6; and V7 is the Abbe number of the seventh lens 7.

[0039] Referring to Figures 7A to 7H, Figures 7A and 7E illustrate the longitudinal spherical aberration on the imaging plane 99 in the first embodiment at wavelengths of 470 nm, 555 nm, and 650 nm in both telephoto and short-focus modes. Figures 7B and 7F illustrate the field curvature aberration in the sagittal direction on the imaging plane 99 in both telephoto and short-focus modes ... Distortion aberration on the imaging plane 99 at 555 nm, 555 nm, and 650 nm. The longitudinal spherical aberration of this first embodiment is shown in Figures 7A and 7E. The curves formed by each wavelength are very close and move towards the center, indicating that off-axis rays at different heights for each wavelength are concentrated near the imaging point. It can be seen from the skewing of the curves for each wavelength that the imaging point deviation of off-axis rays at different heights is controlled within ±0.4 mm. Therefore, this first embodiment does significantly improve the spherical aberration of the same wavelength. In addition, the distances between the three representative wavelengths are also quite close, indicating that the imaging positions of rays of different wavelengths are quite concentrated, thus significantly improving chromatic aberration.

[0040] In the four field curvature aberration diagrams shown in Figures 7B, 7C, 7F, and 7G, the focal length variation for the three representative wavelengths across the entire field of view falls within ±0.4 mm, indicating that the optical system of this first embodiment can effectively eliminate aberrations. The distortion aberration diagrams in Figures 7D and 7H show that the distortion aberration of this embodiment is maintained within ±3%, indicating that the distortion aberration of this first embodiment meets the imaging quality requirements of the optical system. Therefore, this first embodiment can still provide good imaging quality compared to existing optical lenses. Thus, this first embodiment can maintain good optical performance while having a smaller aperture value, smaller size, and good optical performance at different focal lengths.

[0041] Figure 10 is a schematic diagram of the optical imaging lens of the second embodiment of the present invention. Figures 11A to 11H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the second embodiment. Referring first to Figure 10, a second embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 index. The optical axis region 561 of the image-side surface 56 of the fifth lens 5 is convex. The circumferential region 663 of the image-side surface 66 of the sixth lens 6 is concave. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to the first embodiment are omitted in Figure 10.

[0042] Detailed optical data of the optical imaging lens 10 of the second embodiment are shown in Figure 12. 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 focal length mode, with an effective focal length of 10.459 mm, an aperture of 2.239, a half angle of view of 16.679 degrees, and an image height of 3.100 mm. In addition, the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 is 16.038 mm, and the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 is 1.661 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the second embodiment are 0.060 mm, 0.472 mm, and 6.100 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 16.309 mm, an aperture of 3.491, a half-angle of 10.636 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 11.219 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 6.487 mm.

[0043] As shown in Figure 13, Figure 13 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1) of the second embodiment.

[0044] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the second embodiment is shown in Figure 38.

[0045] The longitudinal spherical aberration of this second embodiment in telephoto and short focal length modes are shown in Figures 11A and 11E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±0.14 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes in Figures 11B, 11C, 11F, and 11G, respectively, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.14 mm. The distortion aberration diagrams in telephoto and short focal length modes in Figures 11D and 11H show that the distortion aberration in this embodiment is maintained within ±2%.

[0046] As can be seen from the above description, the aperture value of the second embodiment is smaller than that of the first embodiment. Therefore, compared to the first embodiment, the second embodiment has a greater amount of light intake. Furthermore, 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.

[0047] Figure 14 is a schematic diagram of the optical imaging lens of the third embodiment of the present invention. Figures 15A to 15H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the third embodiment. Referring first to Figure 14, a third embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 region 561 of the image side 56 of the fifth lens 5 is convex. The circumferential region 563 of the image side 56 of the fifth lens 5 is concave. The circumferential region 653 of the object side 65 of the sixth lens 6 is convex. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to those of the first embodiment are omitted in Figure 14.

[0048] Detailed optical data of the optical imaging lens 10 of the third embodiment are shown in Figure 16. 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 short focal length mode, with an effective focal length of 8.927 mm, an aperture of 1.927, a half angle of view of 19.539 degrees, and an image height of 3.100 mm. In addition, the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 is 14.284 mm, and the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 is 1.412 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the third embodiment are 0.866 mm, 0.269 mm, and 5.502 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 13.390 mm, an aperture of 2.891, a half-angle of 12.842 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 10.327 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 5.857 mm.

[0049] As shown in Figure 17, Figure 17 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1) of the third embodiment.

[0050] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the third embodiment is shown in Figure 38.

[0051] The longitudinal spherical aberration of this third embodiment in telephoto and short focal length modes are shown in Figures 15A and 15E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±0.06 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes shown in Figures 15B, 15C, 15F, and 15G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.06 mm. The distortion aberration diagrams in telephoto and short focal length modes shown in Figures 15D and 15H show that the distortion aberration in this embodiment is maintained within ±2.5%.

[0052] As can be seen from the above description, the aperture value of the third embodiment is smaller than that of the first embodiment. Therefore, compared to the first embodiment, the third embodiment has a greater amount of light intake. Furthermore, 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.

[0053] Figure 18 is a schematic diagram of the optical imaging lens of the fourth embodiment of the present invention. Figures 19A to 19H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the fourth embodiment. Referring first to Figure 18, a fourth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 region 561 of the image side 56 of the fifth lens 5 is convex. The circumferential region 563 of the image side 56 of the fifth lens 5 is concave. The circumferential region 653 of the object side 65 of the sixth lens 6 is convex. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to the first embodiment are omitted in Figure 18.

[0054] Detailed optical data of the optical imaging lens 10 of the fourth embodiment are shown in Figure 20. 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 focal length mode, with an effective focal length of 11.029 mm, an aperture of 2.385, a half angle of view of 16.466 degrees, and an image height of 3.100 mm. In addition, the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 is 15.368 mm, and the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 is 1.927 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the fourth embodiment are 0.055 mm, 0.225 mm, and 7.900 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 22.069 mm, an aperture of 4.771, a half-angle of 8.871 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 10.416 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 8.812 mm.

[0055] As shown in Figure 21, Figure 21 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1) of the fourth embodiment.

[0056] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the fourth embodiment is shown in Figure 38.

[0057] The longitudinal spherical aberration of this fourth embodiment in telephoto and short focal length modes are shown in Figures 19A and 19E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±1.6 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes shown in Figures 19B, 19C, 19F, and 19G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±1.6 mm. The distortion aberration diagrams in telephoto and short focal length modes shown in Figures 19D and 19H demonstrate that the distortion aberration in this embodiment is maintained within ±2%.

[0058] As can be seen from the above description, the zoom ratio of the fourth embodiment is greater than that of the first embodiment. Therefore, compared to the first embodiment, the fourth embodiment has a wider range of shooting focal lengths. Furthermore, the distortion aberration of the fourth embodiment is less than that of the first embodiment.

[0059] Figure 22 is a schematic diagram of the optical imaging lens of the fifth embodiment of the present invention. Figures 23A to 23H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the fifth embodiment. Referring first to Figure 22, a fifth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 region 561 of the image side 56 of the fifth lens 5 is convex. The circumferential region 653 of the object side 65 of the sixth lens 6 is convex. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to those of the first embodiment are omitted in Figure 22.

[0060] Detailed optical data of the optical imaging lens 10 of the fifth embodiment are shown in Figure 24. 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 focal length mode, with an effective focal length of 9.740 mm, an aperture of 2.056, a half angle of view of 18.251 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 14.698 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 2.044 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the fifth embodiment are 0.093 mm, 0.319 mm, and 6.135 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 14.708 mm, an aperture of 3.105, a half-angle of 11.585 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 9.448 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 6.657 mm.

[0061] As shown in Figure 25, Figure 25 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1) of the fifth embodiment.

[0062] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the fifth embodiment is shown in Figure 39.

[0063] The longitudinal spherical aberration of this fifth embodiment in telephoto and short focal length modes are shown in Figures 23A and 23E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±0.1 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes (Figures 23B, 23C, 23F, and 23G), the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.25 mm. The distortion aberration diagrams in telephoto and short focal length modes (Figures 23D and 23H) show that the distortion aberration in this embodiment is maintained within ±4%.

[0064] As can be seen from the above description, the aperture value of the fifth embodiment is smaller than that of the first embodiment. Therefore, compared to the first embodiment, the fifth embodiment has a greater amount of light intake. Furthermore, 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.

[0065] Figure 26 is a schematic diagram of the optical imaging lens of the sixth embodiment of the present invention. Figures 27A to 27H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the sixth embodiment. Referring first to Figure 26, a sixth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 region 561 of the image side 56 of the fifth lens 5 is convex. The circumferential region 653 of the object side 65 of the sixth lens 6 is convex. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to those of the first embodiment are omitted in Figure 26.

[0066] Detailed optical data of the optical imaging lens 10 of the sixth embodiment are shown in Figure 28. 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 focal length mode, with an effective focal length of 10.013 mm, an aperture of f / 2.151, a half angle of view of 17.498 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 15.886 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 2.129 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the sixth embodiment are 0.075 mm, 0.441 mm, and 6.242 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 15.673 mm, an aperture of 3.367, a half-angle of 10.966 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 10.190 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 6.767 mm.

[0067] As shown in Figure 29, Figure 29 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1) of the sixth embodiment.

[0068] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the sixth embodiment is shown in Figure 39.

[0069] The longitudinal spherical aberration of this sixth embodiment in telephoto and short focal length modes are shown in Figures 27A and 27E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±0.03 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes shown in Figures 27B, 27C, 27F, and 27G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.06 mm. The distortion aberration diagrams in telephoto and short focal length modes shown in Figures 27D and 27H show that the distortion aberration in this embodiment is maintained within ±2.5%.

[0070] As can be seen from the above description, the aperture value of the sixth embodiment is smaller than that of the first embodiment. Therefore, compared to the first embodiment, the sixth embodiment has a greater amount of light intake. Furthermore, 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.

[0071] Figure 30 is a schematic diagram of the optical imaging lens according to the seventh embodiment of the present invention. Figures 31A to 31H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the seventh embodiment. Referring first to Figure 30, a seventh embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 region 561 of the image side 56 of the fifth lens 5 is convex. The circumferential region 653 of the object side 65 of the sixth lens 6 is convex. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with similar surface shapes to those of the first embodiment are omitted in Figure 30.

[0072] Detailed optical data of the optical imaging lens 10 of the seventh embodiment are shown in Figure 32. 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 focal length mode, with an effective focal length of 10.730 mm, an aperture of 2.310, a half angle of view of 16.365 degrees, and an image height of 3.100 mm. In addition, the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 is 15.722 mm, and the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 is 1.483 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the seventh embodiment are 1.243 mm, 0.148 mm, and 5.977 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 16.166 mm, an aperture of 3.480, a half-angle of 10.906 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 13.102 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 6.687 mm.

[0073] As shown in Figure 33, Figure 33 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1).

[0074] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the seventh embodiment is shown in Figure 39.

[0075] The longitudinal spherical aberration of this seventh embodiment in telephoto and short focal length modes are shown in Figures 31A and 31E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±0.06 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes shown in Figures 31B, 31C, 31F, and 31G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.05 mm. The distortion aberration diagrams in telephoto and short focal length modes shown in Figures 31D and 31H show that the distortion aberration in this embodiment is maintained within ±1.8%.

[0076] As can be seen from the above description, the aperture value of the seventh embodiment is smaller than that of the first embodiment. Therefore, compared to the first embodiment, the seventh embodiment has a greater amount of light intake. Furthermore, 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.

[0077] Figure 34 is a schematic diagram of the optical imaging lens of the eighth embodiment of the present invention. Figures 35A to 35H are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the eighth embodiment. Referring first to Figure 34, an eighth embodiment of the optical imaging lens 10 of the present invention is generally similar to the first embodiment, but the differences are as follows: the optical data, aspherical 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 region 561 of the image side 56 of the fifth lens 5 is convex. The circumferential region 653 of the object side 65 of the sixth lens 6 is convex. It should be noted that, for the sake of clear display, the labels of the optical axis region and the circumferential region with similar surface shapes to the first embodiment are omitted in Figure 34.

[0078] Detailed optical data of the optical imaging lens 10 of the eighth embodiment are shown in Figure 36. 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 focal length mode, with an effective focal length of 10.273 mm, an aperture of 2.195, a half angle of view of 16.963 degrees, and an image height of 3.100 mm. In addition, the distance on the optical axis I from the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 is 15.367 mm, and the distance on the optical axis I from the image side 76 of the seventh lens 7 to the imaging plane 99 is 1.450 mm. On the other hand, when the adjustable air gaps D1, D2, and D3 of the optical imaging lens 10 in the eighth embodiment are 0.088 mm, 0.160 mm, and 6.129 mm, respectively, the optical imaging lens 10 is in telephoto mode, with an effective focal length of 15.924 mm, an aperture of f / 3.403, a half angle of view of 10.934 degrees, and an image height of 3.100 mm. Furthermore, the distance on the optical axis I from the object-side surface 15 of the first lens 1 to the image-side surface 76 of the seventh lens 7 is 10.807 mm, and the distance on the optical axis I from the image-side surface 76 of the seventh lens 7 to the imaging plane 99 is 6.839 mm.

[0079] As shown in Figure 37, Figure 37 shows the aspherical coefficients of the object side 15 of the first lens 1 to the image side 76 of the seventh lens 7 in the above formula (1) of the eighth embodiment.

[0080] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the eighth embodiment is shown in Figure 39.

[0081] The longitudinal spherical aberration of this eighth embodiment in telephoto and short focal length modes are shown in Figures 35A and 35E, respectively. The imaging point deviation of off-axis rays at different heights is controlled within ±0.035 mm. In the four field curvature aberration diagrams in telephoto and short focal length modes shown in Figures 35B, 35C, 35F, and 35G, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.035 mm. The distortion aberration diagrams in telephoto and short focal length modes shown in Figures 35D and 35H demonstrate that the distortion aberration in this embodiment is maintained within ±1%.

[0082] As can be seen from the above description, the aperture value of the eighth embodiment is smaller than that of the first embodiment. Therefore, compared to the first embodiment, the eighth embodiment has a greater amount of light intake. Furthermore, 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.

[0083] Referring further to Figures 38 and 39, Figure 38 is a table showing the optical parameters of the first to fourth embodiments described above, and Figure 39 is a table showing the optical parameters of the fifth to eighth embodiments described above. From the optical imaging lenses 10 of the above embodiments, it can be seen that the optical imaging lens 10 of the embodiments of the present invention can achieve the following effects and advantages:

[0084] 1. When the second lens 2 has a negative refractive index or the third lens 3 has a positive refractive index, the spherical aberration generated by the optical imaging system during focal length changes can be reduced. Combined with the convexity of the circumferential region 453 of the object side 45 of the fourth lens 4, the positive refractive index of the fifth lens 5, the positive refractive index of the sixth lens 6, the convexity of the optical axis region 761 of the object side 76 of the seventh lens 7, 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 it can have good optical quality at different focal lengths.

[0085] Second, as mentioned in the first point above, if the first lens 1 further satisfies the requirement of having a positive refractive index, it can effectively converge and focus incident light rays from different angles.

[0086] Third, when the circumferential region 453 of the object-side surface 45 of the fourth lens 4 of the optical imaging lens 10 of the present invention is convex, the edge aberration of the imaging surface 99 can be improved. In addition, by combining the fifth lens 5 having positive refractive index, the sixth lens 6 having positive refractive index, the optical axis region 751 of the object-side surface 75 of the seventh lens 7 being convex, the circumferential region 753 of the object-side surface 75 of the seventh lens 7 being concave, 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 it can have good optical quality at different focal lengths.

[0087] Fourth, when the first lens 1 of the optical imaging lens 10 of the present invention has a positive refractive index, the circumferential region 163 of the image-side surface 16 of the first lens 1 is convex, and the circumferential region 453 of the object-side surface 45 of the fourth lens 4 is convex, it can effectively converge and gather incident light rays from different angles and improve the edge aberrations of the imaging surface 99. In addition, by combining the fifth lens 5 having a positive refractive index, the seventh lens 7 having a negative refractive index, the optical axis region 761 of the image-side surface 76 of the seventh lens 7 being concave, 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 it can have good optical quality at different focal lengths.

[0088] Fifth, as mentioned in point four above, if the second lens 2 has a negative refractive index, or the third lens 3 has a positive refractive index, or the sixth lens 6 has a positive refractive index, the spherical aberration generated by the optical imaging system during focal length changes can be reduced.

[0089] VI. When the circumferential region 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 region 263 of the image-side surface 26 of the second lens 2 is concave, and the third lens 3 has a positive refractive index, the marginal aberration of the imaging surface 99 can be improved. Combined with the fifth lens 5 having a positive refractive index, the seventh lens 7 having a negative refractive index, the optical axis region 761 of the image-side surface 76 of the seventh lens 7 being concave, 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 it can have good optical quality at different focal lengths. When the first lens 1 has a positive refractive index, or the second lens 2 has a negative refractive index, or the sixth lens 6 has a positive refractive index, the spherical aberration generated by the optical imaging system during focal length changes can be reduced.

[0090] VII. In the optical imaging lens 10 of the present invention, an air gap is provided on the optical axis I between two adjacent optical elements (e.g., aperture 0 and lens, or lens and lens, or lens and filter 9), wherein the number of adjustable air gaps is at least one and at most three. Between the first lens 1 and 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 overall size of the lens assembly can be kept from being too large, making it easier to achieve the requirements of being thin, light, and compact while maintaining assembly yield.

[0091] 8. When the zoom ratio, back focal length, effective focal length and their variation in this invention satisfy the following ranges or proportional relationships, they can better improve the distortion and field curvature aberration of the optical imaging system. in, The optical imaging lens 10 conforms to EFL ≤ 23.000 mm, with a preferred range of 8.800 mm ≤ EFL ≤ 23.000 mm; The optical imaging lens 10 can meet the requirement of ΔEFL ≥ 4.400 mm, with a preferred range of 4.400 mm ≤ ΔEFL ≤ 12.000 mm; The optical imaging lens 10 can meet the requirement of ft / fw ≥ 1.450, with a preferred range of 1.450 ≤ ft / fw ≤ 2.100; The optical imaging lens 10 can meet the requirement of ΔEFL / ΔBFL≦1.700, with a preferred range of 1.000≦ΔEFL / ΔBFL≦1.700; The optical imaging lens 10 can meet the requirement of ΔEFL / ΔAAG≦2.300, with a preferred range of 0.900≦ΔEFL / ΔAAG≦2.300; The optical imaging lens 10 can meet the requirement of ΔEFL / ΔGmax≦4.200, with a preferred range of 1.500≦ΔEFL / ΔGmax≦4.200; The optical imaging lens 10 can meet the requirement of TL / BFL≦10.600, with a preferred range of 1.000≦TL / BFL≦10.600; The optical imaging lens 10 can meet the requirements of TTL / (AAG+BFL) ≥ 1.600, with a preferred range of 1.600 ≤ TTL / (AAG+BFL) ≤ 2.450; and The optical imaging lens 10 can meet the requirement of (AAG+BFL) / Tavg≦8.900, with a better range of 1.300≦(AAG+BFL) / Tavg≦8.900.

[0092] 9. When the lens material meets the following limitations, it can effectively suppress chromatic aberration and spherical aberration generated during zooming, so that the optical imaging lens 10 can have good resolution at different focal lengths. in, The optical imaging lens 10 can meet the requirement of V1+V2+V6≦125.000, with a preferred range of 76.000≦V1+V2+V6≦125.000; The optical imaging lens 10 can conform to V1+V3+V4≦125.000, with a preferred range of 95.000≦V1+V3+V4≦125.000; and The optical imaging lens 10 can conform to V2+V5+V6+V7≦180.000, with a preferred range of 150.000≦V2+V5+V6+V7≦180.000.

[0093] 10. To ensure image quality and take into account the ease of manufacturing, the air gap between lenses or the lens thickness is appropriately shortened or maintained at a certain ratio. When the numerical limits of the following condition formula are met, the embodiments of the present invention can have a better configuration. in, The optical imaging lens 10 can meet the requirement of TTL / Tmax≦10.000, with a preferred range of 5.900≦TTL / Tmax≦10.000; The optical imaging lens 10 can meet the requirement of AAG / Tmin≦15.300, with a preferred range of 2.650≦AAG / Tmin≦15.300; The optical imaging lens 10 can meet the condition ALT / (T3+G34+T4)≦3.300, with a preferred range of 2.000≦ALT / (T3+G34+T4)≦3.300; The optical imaging lens 10 can meet the requirements of (T1+G12+T2+G23+T3) / T7≦7.700, with a preferred range of 2.500≦(T1+G12+T2+G23+T3) / T7≦7.700; The optical imaging lens 10 can meet the requirement of TTL / (T1+T7)≦9.200, with a preferred range of 6.100≦TTL / (T1+T7)≦9.200; The optical imaging lens 10 can meet the requirement of ALT / (Tmax+Tmin)≧2.800, with a preferred range of 2.800≦ALT / (Tmax+Tmin)≦4.200; The optical imaging lens 10 can meet the requirement of TL / (T5+G56+T6+G67+T7)≦2.900, with a better range of 1.700≦TL / (T5+G56+T6+G67+T7)≦2.900; The optical imaging lens 10 can meet the condition (T6+G67+T7) / (T1+G12+T2)≧1.550, with a preferred range of 1.550≦(T6+G67+T7) / (T1+G12+T2)≦2.650; The optical imaging lens 10 can meet the requirement of TTL / (T4+G45+T5)≦8.800, with a preferred range of 4.000≦TTL / (T4+G45+T5)≦8.800; The optical imaging lens 10 can meet the requirement of Tmax / Tmin≦6.000, with a preferred range of 3.500≦Tmax / Tmin≦6.000; The optical imaging lens 10 can meet the requirement of (T3+T6) / (T1+T2)≧1.600, with a preferred range of 1.600≦(T3+T6) / (T1+T2)≦4.000; and The optical imaging lens 10 can meet the requirements of (T3+G34+T4+G45+T5) / (T1+G12+T2)≧2.300, and the preferred range is 2.300≦(T3+G34+T4+G45+T5) / (T1+G12+T2)≦4.800.

[0094] In addition, any combination of parameters in the alternative embodiments can be selected to increase lens constraints, thereby facilitating lens design with the same architecture as the present invention.

[0095] Given the unpredictability of optical system design, under the framework of this invention, meeting the above-mentioned conditions can better shorten the length of the lens system, increase the usable aperture, improve image quality, or improve assembly yield, thereby overcoming the shortcomings of prior art. Furthermore, the use of plastic material for the lens in the embodiments of this invention further reduces lens weight and saves costs.

[0096] The embodiments of this invention disclose optical parameters including, but not limited to, focal length, lens thickness, Abbe number, etc. For example, the present invention discloses an optical parameter A and an optical parameter B in various embodiments. The specific explanations of the ranges covered by these optical parameters, the comparison relationships between the optical parameters, and the conditional ranges covered by the multiple embodiments are as follows: (1) The range covered by the optical parameters, for example: α2≦A≦α1 or β2≦B≦β1, where α1 is the maximum value of optical parameter A in multiple embodiments, α2 is the minimum value of optical parameter A in multiple embodiments, β1 is the maximum value of optical parameter B in multiple embodiments, and β2 is the minimum value of optical parameter B in multiple embodiments. (2) Comparison of optical parameters, for example: A is greater than B or A is less than B. (3) The range of conditional expressions covered by multiple embodiments, specifically, refers to the combination or proportional relationship obtained by possible calculations of a plurality of optical parameters of the same embodiment, and 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 condition E≦γ1 or E≧γ2 or γ2≦E≦γ1, where γ1 and γ2 are the values ​​obtained by calculations of optical parameter A and optical parameter B of the same embodiment, and γ1 is the maximum value in multiple embodiments of the present invention, and γ2 is the minimum value in multiple embodiments of the present invention.

[0097] The range covered by the aforementioned optical parameters, the comparative relationships between the optical parameters, and the maximum, minimum, and numerical ranges within these conditions are all features upon which the present invention can be implemented, and all fall within the scope disclosed in the present invention. The above are merely illustrative examples and should not be construed as limiting.

[0098] All embodiments of the present invention are feasible, and some feature combinations can be extracted from the same embodiment. Compared with the prior art, these feature combinations can achieve unexpected effects. These feature combinations include, but are not limited to, combinations of features such as surface shape, refractive index, and conditional features. The disclosure of the embodiments of the present invention is a specific example to illustrate the principles of the present invention and should not be limited to the disclosed embodiments. Furthermore, the embodiments and their accompanying drawings are only for illustrative purposes and are not limited thereto.

[0099] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0100] 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: Side view of the object 16,26,36,46,56,66,76,96,120,320: Side view 99: Imaging plane 100, 200, 300, 400, 500: Lenses 130: Assembly Department 151,161,251,261,351,361,451,461,551,561,651,661,751,761,Z1: Optical axis region 153,163,253,263,353,363,453,463,553,563,653,663,753,763,Z2: Circular region 211, 212: Parallel rays A1: Object side A2: Image side D1, D2, D3: Adjustable air gaps CP: Center point CP1: First center point CP2: Second center point EL: Extension line I: optical axis Lc: Main Ray Lm: Edge ray M,R: Intersection points OB: Optical boundary TP1: First conversion point TP2: Second conversion point Z3: Relay Area

Claims

1. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes; an optical axis region of the object-side surface of the first lens is convex; a circumferential region of the object-side surface of the second lens is convex; and the seventh lens has a negative refractive index, and an optical axis region of the image-side surface of the seventh lens is concave; wherein, The optical imaging lens has only the seven lenses mentioned above, and the optical imaging lens has at least one adjustable air gap. The optical imaging lens satisfies the following conditions: the thickness of the first lens on the optical axis is less than the thickness of the fifth lens on the optical axis; the thickness of the seventh lens on the optical axis is greater than the air gap between the fourth and fifth lenses on the optical axis; and the Abbe number of the first lens is less than the Abbe number of the second lens.

2. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes; an optical axis region of the object-side surface of the first lens is convex; a circumferential region of the object-side surface of the second lens is convex; an optical axis region of the image-side surface of the fourth lens is concave; and the seventh lens has a negative refractive index; wherein, The optical imaging lens has only the seven lenses mentioned above, and the optical imaging lens has at least one adjustable air gap. The optical imaging lens satisfies the following conditions: the thickness of the first lens on the optical axis is less than the thickness of the fifth lens on the optical axis; the thickness of the seventh lens on the optical axis is greater than the air gap between the fourth and fifth lenses on the optical axis; and the Abbe number of the first lens is less than the Abbe number of the second lens.

3. An optical imaging lens as described in any one of claims 1 and 2, wherein the optical imaging lens satisfies the following formula: V1+V3+V4≦125.000, where 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.

4. An optical imaging lens as described in any one of claims 1 and 2, wherein the optical imaging lens satisfies the following formula: V2+V5+V6+V7≦180.000, where 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.

5. An optical imaging lens, comprising, sequentially from an object side to an image side along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens, wherein each of the first to seventh lenses includes an object-side surface facing the object side and through which imaging light passes, and an image-side surface facing the image side and through which imaging light passes; an optical axis region of the object-side surface of the first lens is convex; a circumferential region of the object-side surface of the second lens is convex; an optical axis region of the object-side surface of the fifth lens is convex; the sixth lens has a positive refractive index; and the seventh lens has a negative refractive index, and an optical axis region of the object-side surface of the seventh lens is convex; wherein, The optical imaging lens has only the seven lenses mentioned above, and the optical imaging lens has at least one adjustable air gap. The optical imaging lens satisfies the following conditions: the thickness of the first lens on the optical axis is less than the thickness of the fifth lens on the optical axis; the optical imaging lens satisfies the following conditions: the thickness of the second lens on the optical axis is less than the thickness of the seventh lens on the optical axis.

6. The optical imaging lens as claimed in claim 5, wherein the optical imaging lens satisfies the following formula: (T1+G12+T2+G23+T3) / T7≦7.700, where 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 as claimed in claim 5, wherein the optical imaging lens satisfies the following formula: TTL / (T4+G45+T5)≦8.800, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, T4 is the thickness of the fourth lens on the optical axis, G45 is the air gap between the fourth lens and the fifth lens on the optical axis, and T5 is the thickness of the fifth lens on the optical axis.

8. The optical imaging lens as claimed in claim 5, wherein the optical imaging lens satisfies the following formula: (T6+G67+T7) / (T1+G12+T2)≧1.550, where 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.

9. An optical imaging lens as claimed in any one of claims 2 and 5, wherein the optical imaging lens satisfies the following formula: TTL / (T1+T7)≦9.200, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, T1 is the thickness of the first lens on the optical axis, and T7 is the thickness of the seventh lens on the optical axis.

10. An optical imaging lens as claimed in any one of claims 2 and 5, wherein the optical imaging lens satisfies the following formula: TL / (T5+G56+T6+G67+T7)≦2.900, where TL is the distance on the optical axis from the object-side surface of the first lens to the image-side surface of the seventh lens, T5 is the thickness of the fifth lens on the optical axis, G56 is the air gap between the fifth lens and the sixth lens on the optical axis, 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, and T7 is the thickness of the seventh lens on the optical axis.

11. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: TTL / Tmax ≦ 10.000, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, and Tmax is the maximum value of the seven lens thicknesses of the first lens to the seventh lens on the optical axis.

12. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: AAG / Tmin ≤ 15.300, where AAG is the sum of the six air gaps of the first lens to the seventh lens on the optical axis, and Tmin is the minimum of the seven lens thicknesses of the first lens to the seventh lens on the optical axis.

13. An optical imaging lens as claimed in any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: ALT / (T3+G34+T4)≦3.300, where 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.

14. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: TL / BFL ≤ 10.600, where TL is the distance on the optical axis from the object side of the first lens to the image side of the seventh lens, and BFL is the distance on the optical axis from the image side of the seventh lens to an imaging plane.

15. An optical imaging lens as claimed in any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: ALT / (Tmax+Tmin)≧2.800, where ALT is the sum of the thicknesses of the 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.

16. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: TTL / (AAG+BFL) ≥ 1.600, where TTL is the distance from the object-side surface of the first lens to an imaging surface on the optical axis, AAG is the sum of the six air gaps from the first lens to the seventh lens on the optical axis, and BFL is the distance from the image-side surface of the seventh lens to the imaging surface on the optical axis.

17. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: Tmax / Tmin ≦ 6.000, where Tmax is the maximum value of the seven lens thicknesses 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.

18. An optical imaging lens as claimed in any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies the following formula: (AAG+BFL) / Tavg≦8.900, where AAG is the sum of the six air gaps of the first lens to the seventh lens on the optical axis, BFL is the distance from the image side of the seventh lens to an imaging surface on the optical axis, and Tavg is the average of the seven lens thicknesses of the first lens to the seventh lens on the optical axis.

19. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies that the thickness of the fourth lens on the optical axis is less than the thickness of the sixth lens on the optical axis.

20. The optical imaging lens of any one of claims 1, 2 and 5, wherein the optical imaging lens satisfies that the thickness of the sixth lens on the optical axis is greater than the air gap between the first lens and the second lens on the optical axis.

Images