Optical imaging lens

Abstract

An optical imaging lens comprises, sequentially from the object side to the 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. 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 fourth lens has positive refractive index, and a circumferential region of its object-side surface is convex. A region along the optical axis of the object-side surface of the sixth lens is convex, and a region along the optical axis of its image-side surface is concave. A region along the optical axis of the object-side surface of the seventh lens is concave. The optical imaging lens comprises only seven lenses.

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 a wider field of view is also becoming a trend. Furthermore, to successfully capture images in low-light conditions, the lens's image height must be increased, allowing for the use of larger image sensors to receive imaging light and meet high-resolution requirements. Simultaneously, market standards for lens chromatic aberration and aberration reduction are becoming increasingly stringent. Therefore, designing an optical imaging lens that combines lightweight compactness with a small aperture, wide field of view, large image height, and excellent image quality has become a challenge and a problem that must be solved. Summary of the Invention

[0003] This invention provides an optical imaging lens with a small aperture value, a large field of view, a large image height, improved chromatic aberration and aberration, and excellent imaging quality.

[0004] This invention provides an optical imaging lens, comprising, sequentially from the object side to the 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. 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 a circumferential region of its object-side surface is convex. A circumferential region of the object-side surface of the second lens is convex. The fourth lens has a positive refractive index, and a circumferential region of its object-side surface is convex. A region along the optical axis of the image-side surface of the fifth lens is convex. A region along the optical axis of the object-side surface of the sixth lens is convex, and a region along the optical axis of the image-side surface of the sixth lens is concave. A region along the optical axis of the object-side surface of the seventh lens is concave. The optical imaging lens has only seven lenses, and satisfies V3+V4+V5+V6+V7≦195.000, where V3 is the Abbe number of the third lens, V4 is the Abbe number of the fourth 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.

[0005] The present invention also provides an optical imaging lens, comprising, sequentially from the object side to the 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. 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 a circumferential region of its object-side surface is convex. A circumferential region of the object-side surface of the third lens is concave. The fourth lens has a positive refractive index, and a circumferential region of its object-side surface is convex. A region along the optical axis of the object side of the fifth lens is concave. A region along the optical axis of the image side of the sixth lens is concave. A region along the optical axis of the object side of the seventh lens is concave. The optical imaging lens comprises only seven lenses, and satisfies V4+V5+V6+V7≦170.000.

[0006] The present invention also provides an optical imaging lens, comprising, sequentially from the object side to the 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. 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. The fourth lens has a positive refractive index, and a circumferential region of its object-side surface is convex. The sixth lens has a convex optical axis region of its object-side surface and a concave optical axis region of its image-side surface. The seventh lens has a concave optical axis region of its object-side surface. The optical imaging lens has only seven lenses, and satisfies V4+V5+V6+V7≦170.000 and D22t71 / D42t61≧3.600, where D22t71 is the distance on the optical axis from the image side of the second lens to the object side of the seventh lens, and D42t61 is the distance on the optical axis from the image side of the fourth lens to the object side of the sixth lens.

[0007] 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 and the refractive index conditions, the optical imaging lens has a smaller aperture value, a larger field of view, a larger image height, can improve chromatic aberration and aberration, and has excellent imaging quality.

[0008] 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

[0009] 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 7D 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 11D 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 15D are diagrams of 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 19D 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 23D 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 27D 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 shows the numerical values ​​of the relationships between various important parameters of the optical imaging lenses of the first to sixth embodiments of the present invention. Implementation

[0010] 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.

[0011] 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.

[0012] 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).

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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, the surface shape changes at the transition point TP1, so the circumferential region Z2 is convex.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Figure 6 is a schematic diagram of the optical imaging lens of the first embodiment of the present invention. Figures 7A to 7D are diagrams of longitudinal spherical aberration and various aberrations of the optical imaging lens of the first embodiment. Referring first to Figure 6, the optical imaging lens 10 of the first embodiment of the present invention includes, from the object side A1 to the image side A2, a first aperture 0, a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, a seventh lens 7, and a filter 9 in sequence along an optical axis I of the optical imaging lens 10. When light emitted from an object to be photographed enters the optical imaging lens 10 and passes through the aperture 0, the first lens 1, the second lens 2, the third lens 3, the fourth lens 4, the fifth lens 5, the sixth lens 6, the seventh lens 7, and the filter 9, 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.

[0025] 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 first lens 1 is positioned between the aperture 0 and the second lens 2.

[0026] 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 also convex. The optical axis region 161 of the image-side surface 16 of the first lens 1 is concave, and its circumferential region 163 is also concave. 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.

[0027] 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.

[0028] The third lens 3 has a negative 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 concave. The optical axis region 361 of the image-side surface 36 of the third lens 3 is concave, and its circumferential region 363 is 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.

[0029] The fourth lens 4 has a positive refractive index. The optical axis region 451 of the object-side surface 45 of the fourth lens 4 is convex, and its circumferential region 453 is also convex. The optical axis region 461 of the image-side surface 46 of the fourth lens 4 is convex, and its circumferential region 463 is also convex. 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.

[0030] The fifth lens 5 has a negative refractive index. The optical axis region 551 of the object-side surface 55 of the fifth lens 5 is concave, and its circumferential region 553 is also concave. The optical axis region 561 of the image-side surface 56 of the fifth lens 5 is convex, 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.

[0031] 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 convex, and its circumferential region 653 is concave. The optical axis region 661 of the image-side surface 66 of the sixth lens 6 is concave, and its circumferential region 663 is 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.

[0032] 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 concave, and its circumferential region 753 is convex. The optical axis region 761 of the image-side surface 76 of the seventh lens 7 is concave, and its circumferential region 763 is convex. 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.

[0033] In this embodiment, the optical imaging lens 10 has only the seven lenses mentioned above.

[0034] Other detailed optical data of the first embodiment are shown in Figure 8. The effective focal length (EFL) of the optical imaging lens 10 of the first embodiment is 5.718 mm, the half field of view (HFOV) is 42.162 degrees, the system length is 7.961 mm, the aperture value (F-number, Fno) is 1.500, and the image height is 5.099 mm. The system length refers to the distance from the object side surface 15 of the first lens 1 to the imaging surface 99 on the optical axis I.

[0035] 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.

[0036] 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.

[0037] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the first embodiment is shown in Figure 30. 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 optical axis I; T4 is the thickness of the fourth lens 4 on the 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 on the optical axis I between the first lens 1 and the second lens 2; 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 36 of the third lens 3 to the object side 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 on optical axis I between the sixth lens 6 and the seventh lens 7; 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; 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 distance on optical axis I from the image side 76 of the seventh lens 7 to the object side 95 of the filter 9, that is, the air gap on optical axis I between the seventh lens 7 and the filter 9; TF is the thickness of filter 9 along optical axis I; GFP is the distance on the optical axis I from the image side 95 of filter 9 to the imaging surface 99, that is, the air gap on the optical axis I between filter 9 and imaging surface 99; Tmax is the maximum value of the thickness of the seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I, namely the maximum value among T1, T2, T3, T4, T5, T6, and T7; Tmin is the minimum thickness of the seven lenses from the first lens 1 to the seventh lens 7 on the optical axis I, that is, the minimum value among T1, T2, T3, T4, T5, T6, and T7; Gmax is the maximum value of the six air gaps on the optical axis I from the first lens 1 to the seventh lens 7, namely the maximum value among G12, G23, G34, G45, G56, and G67; D22t71 is the distance on the optical axis from the image side 26 of the second lens 2 to the object side 75 of the seventh lens 7, that is, the sum of G23, T3, G34, T4, G45, T5, G56, T6, and G67; D42t61 is the distance on the optical axis from the image side 46 of the fourth lens 4 to the object side 65 of the sixth lens 6, which is the sum of G45, T5, and G56; 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, which 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.

[0038] Referring in conjunction with Figures 7A to 7D, Figure 7A illustrates the longitudinal spherical aberration on the imaging plane 99 of the first embodiment when the wavelengths are 470 nm, 555 nm, and 650 nm. Figures 7B and 7C illustrate the field curvature aberration in the sagittal direction and the field curvature aberration in the tangential direction on the imaging plane 99 of the first embodiment when the wavelengths are 470 nm, 555 nm, and 650 nm, respectively. Figure 7D illustrates the distortion aberration on the imaging plane 99 of the first embodiment when the wavelengths are 470 nm, 555 nm, and 650 nm. As shown in Figure 7A, the longitudinal spherical aberration of this first embodiment is very close to each other and moves towards the center, indicating that off-axis rays of different heights for each wavelength are concentrated near the imaging point. The skewing of the curves for each wavelength shows that the imaging point deviation of off-axis rays of different heights is controlled within ±0.03 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.

[0039] In the two field curvature aberration diagrams in Figures 7B and 7C, the focal length variation of the three representative wavelengths falls within ±0.04 mm across the entire field of view, indicating that the optical system of this first embodiment can effectively eliminate aberrations. The distortion aberration diagram in Figure 7D shows 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, compared to existing optical lenses, can still provide good imaging quality even with a system length shortened to 7.961 mm. Thus, this first embodiment can maintain good optical performance while possessing a smaller aperture value, a larger field of view, a larger image height, and excellent imaging quality.

[0040] Figure 10 is a schematic diagram of the optical imaging lens of the second embodiment of the present invention. Figures 11A to 11D 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. It should be noted that, for the sake of clear display, the labels of some optical axis regions and circumferential regions with surface shapes similar to those of the first embodiment are omitted in Figure 10.

[0041] The detailed optical data of the optical imaging lens 10 of the second embodiment is shown in Figure 12. The effective focal length of the optical imaging lens 10 of the second embodiment is 5.949 mm, the half angle of view is 41.334 degrees, the system length is 8.181 mm, the aperture value is 1.500, and the image height is 4.500 mm.

[0042] 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.

[0043] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the second embodiment is shown in Figure 30.

[0044] As shown in Figure 11A, the longitudinal spherical aberration of this second embodiment controls the imaging point deviation of off-axis rays at different heights within ±0.02 mm. In the two field curvature aberration diagrams in Figures 11B and 11C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.04 mm. The distortion aberration diagram in Figure 11D shows that the distortion aberration of this embodiment is maintained within ±16%.

[0045] As can be seen from the above description, the longitudinal spherical aberration of the second embodiment is smaller than that of the first embodiment.

[0046] Figure 14 is a schematic diagram of the optical imaging lens of the third embodiment of the present invention. Figures 15A to 15D 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 second lens 2 has a positive refractive index. The third lens 3 has a positive refractive index and the circumferential region 363 of the image-side surface 36 of the third lens 3 is concave. The fifth lens 5 has a positive refractive index and the circumferential region 563 of the image-side surface 56 of the fifth lens 5 is concave. The sixth lens 6 has a negative refractive index. The seventh lens 7 has a positive refractive index, the circumferential region 753 of the object-side surface 75 of the seventh lens 7 is concave, and the optical axis region 761 of the image-side surface 76 of the seventh lens 7 is convex. It should be noted that, in order to clearly show the drawing, the labels of the optical axis region and the circumferential region that are similar in shape to the first embodiment are omitted in Figure 14.

[0047] The detailed optical data of the optical imaging lens 10 of the third embodiment is shown in Figure 16. The effective focal length of the optical imaging lens 10 of the third embodiment is 3.590 mm, the half angle of view is 42.800 degrees, the system length is 5.795 mm, the aperture value is 1.700, and the image height is 3.414 mm.

[0048] 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.

[0049] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the third embodiment is shown in Figure 30.

[0050] As shown in Figure 15A, the longitudinal spherical aberration of this third embodiment controls the imaging point deviation of off-axis rays at different heights within ±0.05 mm. In the two field curvature aberration diagrams in Figures 15B and 15C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.06 mm. The distortion aberration diagram in Figure 15D shows that the distortion aberration of this embodiment is maintained within ±14%.

[0051] As can be seen from the above description, the system length of the third embodiment is shorter than that of the first embodiment, and the half-angle of the third embodiment is larger than that of the first embodiment. Therefore, compared with the first embodiment, the third embodiment has a larger angle range for receiving images, and compared with the first embodiment, the third embodiment is easier to manufacture, thus having a higher yield.

[0052] Figure 18 is a schematic diagram of the optical imaging lens according to the fourth embodiment of the present invention. Figures 19A to 19D 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 between the two 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. 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 shape to the first embodiment are omitted in Figure 18.

[0053] The detailed optical data of the optical imaging lens 10 of the fourth embodiment is shown in Figure 20. The effective focal length of the optical imaging lens 10 of the fourth embodiment is 5.912 mm, the half angle of view is 40.335 degrees, the system length is 8.011 mm, the aperture value is 1.500, and the image height is 4.672 mm.

[0054] 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.

[0055] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the fourth embodiment is shown in Figure 30.

[0056] As shown in Figure 19A, the longitudinal spherical aberration of this fourth embodiment controls the imaging point deviation of off-axis rays at different heights within ±0.045 mm. In the two field curvature aberration diagrams in Figures 19B and 19C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.05 mm. The distortion aberration diagram in Figure 19D shows that the distortion aberration in this embodiment is maintained within ±10%.

[0057] As can be seen from the above description, the fourth embodiment is easy to manufacture and therefore has a high yield.

[0058] Figure 22 is a schematic diagram of the optical imaging lens of the fifth embodiment of the present invention. Figures 23A to 23D 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 451 of the object side 45 of the fourth lens 4 is concave, and the circumferential region 463 of the image side 46 of the fourth lens 4 is concave. 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 22.

[0059] The detailed optical data of the optical imaging lens 10 of the fifth embodiment is shown in Figure 24. The effective focal length of the optical imaging lens 10 of the fifth embodiment is 6.888 mm, the half angle of view is 42.164 degrees, the system length is 8.508 mm, the aperture value is 2.000, and the image height is 6.000 mm.

[0060] 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.

[0061] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the fifth embodiment is shown in Figure 30.

[0062] As shown in Figure 23A, the longitudinal spherical aberration of this fifth embodiment controls the imaging point deviation of off-axis rays at different heights within ±0.04 mm. In the two field curvature aberration diagrams in Figures 23B and 23C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.05 mm. The distortion aberration diagram in Figure 23D shows that the distortion aberration in this embodiment is maintained within ±5%.

[0063] As can be seen from the above description, the half-angle of view in the fifth embodiment is greater than that in the first embodiment. Therefore, compared to the first embodiment, the fifth embodiment has a wider angle range for receiving images. Furthermore, the image height of the fifth embodiment is greater than that of the first embodiment. Therefore, compared to the first embodiment, the fifth embodiment has better photosensitivity.

[0064] Figure 26 is a schematic diagram of the optical imaging lens according to the sixth embodiment of the present invention. Figures 27A to 27D 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 451 of the object side 45 of the fourth lens 4 is concave. 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 shape to the first embodiment are omitted in Figure 26.

[0065] The detailed optical data of the optical imaging lens 10 of the sixth embodiment is shown in Figure 28. The effective focal length of the optical imaging lens 10 of the sixth embodiment is 6.677 mm, the half angle of view is 42.164 degrees, the system length is 8.620 mm, the aperture value is 1.700, and the image height is 5.980 mm.

[0066] 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.

[0067] Furthermore, the relationship between the important parameters in the optical imaging lens 10 of the sixth embodiment is shown in Figure 30.

[0068] As shown in Figure 27A, the longitudinal spherical aberration of this sixth embodiment controls the imaging point deviation of off-axis rays at different heights within ±0.04 mm. In the two field curvature aberration diagrams in Figures 27B and 27C, the focal length variation of the three representative wavelengths across the entire field of view falls within ±0.08 mm. The distortion aberration diagram in Figure 27D shows that the distortion aberration of this embodiment is maintained within ±3%.

[0069] As can be seen from the above description, the image height of the sixth embodiment is greater than that of the first embodiment. Therefore, compared with the first embodiment, the sixth embodiment has better photosensitivity.

[0070] Referring to Figure 30, which is a table of optical parameters for the first to sixth embodiments described above, when the first lens 1 has a positive refractive index, the circumferential region 153 of the object-side surface 15 of the first lens 1 is convex, and the circumferential region 253 of the object-side surface 25 of the second lens 2 is convex, the surface design of the first lens 1 and the second lens 2 can effectively converge large-angle imaging light rays, allowing large-angle light rays to enter the optical system and achieving the purpose of expanding the field of view. Furthermore, when the fourth lens 4 has a positive refractive index, the circumferential region 453 of the object-side surface 45 of the fourth lens 4 is convex, the optical axis region 561 of the image-side surface 56 of the fifth lens 5 is convex, the optical axis region 651 of the object-side surface 65 of the sixth lens 6 is convex, the optical axis region 661 of the image-side surface 66 of the sixth lens 6 is concave, and the optical axis region 751 of the object-side surface 75 of the seventh lens 7 is concave, the overall distortion and aberration of the optical imaging lens 10 can be improved. Furthermore, the combination of materials with V3+V4+V5+V6+V7≦195.000 further eliminates the chromatic aberration caused by the first lens 1 and the second lens 2, giving the optical imaging lens 10 excellent imaging quality. The optimal range for V3+V4+V5+V6+V7 is 135.000≦V3+V4+V5+V6+V7≦195.000.

[0071] On the other hand, when the first lens 1 has a positive refractive index and the circumferential region 153 of the object side 15 of the first lens 1 is convex, the surface design of the first lens 1 allows light rays at large angles to enter the optical imaging system smoothly. When the circumferential region 353 of the object side 35 of the third lens 3 is concave, the direction of light refraction can be corrected, and edge aberrations can be reduced. Furthermore, when the fourth lens 4 has a positive refractive index, the circumferential region 453 of the object side 45 of the fourth lens 4 is convex, the optical axis region 551 of the object side 55 of the fifth lens 5 is concave, the optical axis region 661 of the image side 66 of the sixth lens 6 is concave, and the optical axis region 751 of the object side 75 of the seventh lens 7 is concave, the overall distortion and aberrations of the optical imaging lens 10 can be improved. When the materials of the fourth lens 4 to the seventh lens 7 further satisfy V4+V5+V6+V7≦170.000, chromatic aberration can be effectively eliminated and unnecessary stray light reduced. The preferred implementation range of V4+V5+V6+V7 is 120.000≦V4+V5+V6+V7≦170.000.

[0072] In addition, when the first lens 1 has a positive refractive index, it allows light rays at large angles to enter the optical imaging system smoothly. When the fourth lens has a positive refractive index, the circumferential region 453 of the object side 45 of the fourth lens 4 is convex, the optical axis region 651 of the object side 65 of the sixth lens 6 is convex, the optical axis region 661 of the image side 66 of the sixth lens 6 is concave, and the optical axis region 751 of the object side 75 of the seventh lens 7 is concave, the overall distortion and aberration of the optical imaging lens 10 can be improved. When the materials of the fourth lens 4 to the seventh lens 7 satisfy V4+V5+V6+V7≦170.000, chromatic aberration can be effectively eliminated and unnecessary stray light reduced. Combined with the ratio limit of D22t71 / D42t61≧3.600, the lens size can be effectively controlled, achieving a lightweight effect. The optimal ranges for V4+V5+V6+V7 and D22t71 / D42t61 are 120.000≦V4+V5+V6+V7≦170.000 and 3.600≦D22t71 / D42t61≦8.600, respectively.

[0073] Furthermore, when the image height of the optical imaging lens 10 satisfies the following proportional relationship, it is beneficial to improve the pixel count and resolution of the optical imaging lens 10. in, The optical imaging lens 10 can meet the requirement of (EFL+TL) / ImgH≦3.000, with a preferred range of 2.100≦(EFL+TL) / ImgH≦3.000; The optical imaging lens 10 can meet the requirement of ImgH / Fno ≥ 2.000 mm, with a preferred range of 2.000 mm ≤ ImgH / Fno ≤ 4.000 mm; The optical imaging lens 10 can meet the requirement of ImgH / Fno ≥ 3.000 mm, with a preferred range of 3.000 mm ≤ ImgH / Fno ≤ 4.000 mm; The optical imaging lens 10 can meet the requirement of (TTL+ImgH) / BFL≧13.000, with a preferred range of 13.000≦(TTL+ImgH) / BFL≦33.000; The optical imaging lens 10 can meet the requirement of (TL+ImgH) / AAG≧3.850, with a preferred range of 3.850≦(TL+ImgH) / AAG≦5.200; The optical imaging lens 10 can meet the requirement of (EFL+ImgH) / Tmax≧9.600, with a better range of 9.600≦(EFL+ImgH) / Tmax≦14.500; The optical imaging lens 10 can meet the requirement of (EFL+ImgH) / Tmax≧5.900, with a better range of 5.900≦(EFL+ImgH) / Tmax≦14.500; The optical imaging lens 10 can meet the requirement of ImgH / (AAG+BFL) ≥ 1.200, with a preferred range of 1.200 ≤ ImgH / (AAG+BFL) ≤ 1.800.

[0074] Furthermore, in order to shorten the length of the optical imaging lens 10 system and ensure imaging quality, while also considering 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 limitation of the following condition formula is met, the embodiments of the present invention can have a better configuration. in, The optical imaging lens 10 can meet the requirement of ALT / Gmax ≤ 4.600, with a better range of 2.500 ≤ ALT / Gmax ≤ 4.600; The optical imaging lens 10 can meet the requirement of (T6+G67) / T5≧2.900, with a better range of 2.900≦(T6+G67) / T5≦6.750; The optical imaging lens 10 can meet the requirement of TTL / (T2+G45)≧9.900, with a preferred range of 9.900≦TTL / (T2+G45)≦21.200; The optical imaging lens 10 can meet the condition Tmax / Tmin≦3.500, with a preferred range of 2.600≦Tmax / Tmin≦3.500; The optical imaging lens 10 can meet the requirement of Tmax / Tmin≦5.000, with a preferred range of 2.600≦Tmax / Tmin≦5.000; The optical imaging lens 10 can meet the requirement of EFL / Gmax≦5.650, with a better range of 3.400≦EFL / Gmax≦5.650; The optical imaging lens 10 can meet the requirement of (G45+T7) / T6≦1.500, with a preferred range of 0.400≦(G45+T7) / T6≦1.500; The optical imaging lens 10 can meet the requirement of ALT / (G12+G23+G67)≦2.500, with a better range of 1.450≦ALT / (G12+G23+G67)≦2.500; The optical imaging lens 10 can meet the requirement of (T1+T3) / (G12+G34+G45)≧2.200, with a preferred range of 2.200≦(T1+T3) / (G12+G34+G45)≦4.400; The optical imaging lens 10 can meet the requirements of TTL / Gmax≦7.700, with a better range of 4.800≦TTL / Gmax≦7.700; The optical imaging lens 10 can meet the requirement of (T5+G56+T7) / T1≦1.850, with a preferred range of 0.900≦(T5+G56+T7) / T1≦1.850; The optical imaging lens 10 can meet the requirement of TL / (T4+G45)≧5.300, with a better range of 5.300≦TL / (T4+G45)≦6.900; The optical imaging lens 10 can meet the requirement of TL / (T4+G45)≧4.500, with an optimal range of 4.500≦TL / (T4+G45)≦6.900.

[0075] In addition, any combination of parameters in the embodiment can be selected to increase lens constraints, which is beneficial for lens design with the same architecture as the present invention.

[0076] Given the unpredictability of optical system design, under the framework of this invention, meeting the above conditions can better enable this invention to expand the field of view, increase the image height, reduce the aperture value, improve the image quality, or improve the assembly yield, thereby improving the shortcomings of the prior art. Furthermore, the use of plastic material for the lens in the embodiments of this invention can further reduce the weight of the lens and save costs.

[0077] The numerical ranges, including the maximum and minimum values, obtained from the combined proportional relationships of the optical parameters disclosed in the various embodiments of the present invention can all be implemented accordingly.

[0078] In summary, the optical imaging lens of the embodiments of the present invention can achieve the following effects and advantages:

[0079] I. The longitudinal spherical aberration, astigmatism, and distortion in all embodiments of this invention conform to usage specifications. Furthermore, the red, green, and blue light rays at different altitudes are all concentrated near the imaging point. The skewing amplitude of each curve shows that the imaging point deviation of off-axis light rays at different altitudes is controlled, demonstrating excellent spherical aberration, astigmatism, and distortion suppression capabilities. Further review of the imaging quality data reveals that the distances between the red, green, and blue light rays are also quite close, indicating that this invention exhibits excellent concentration of different wavelengths of light under various conditions, resulting in superior dispersion suppression capabilities. In summary, this invention, through the design and combination of the aforementioned lenses, can produce excellent imaging quality.

[0080] II. In the optical imaging lens of this invention, when the first lens has a positive refractive index, and the circumferential region of the object-side surface of the first lens is convex, and the circumferential region of the object-side surface of the second lens is also convex, it can effectively converge large-angle imaging light rays, thereby expanding the field of view. When combined with a fourth lens having a positive refractive index, a convex circumferential region of the object-side surface of the fourth lens, a convex optical axis region of the image-side surface of the fifth lens, a convex optical axis region of the object-side surface of the sixth lens, a concave optical axis region of the image-side surface of the sixth lens, and a concave optical axis region of the object-side surface of the seventh lens, the overall distortion and aberration of the optical imaging lens can be improved. Furthermore, the combination of V3+V4+V5+V6+V7≦195.000 can further eliminate the chromatic aberration caused by the first and second lenses, giving the optical imaging lens excellent imaging quality.

[0081] II. In the optical imaging lens of this invention, when the first lens has a positive refractive index and the circumferential region of the object-side surface of the first lens is convex, large-angle light rays can smoothly enter the optical imaging system. When the circumferential region of the object-side surface of the third lens is concave, the direction of light refraction can be corrected, reducing edge aberrations. Furthermore, when the fourth lens has a positive refractive index, the circumferential region of the object-side surface of the fourth lens is convex, the optical axis region of the object-side surface of the fifth lens is concave, the optical axis region of the image-side surface of the sixth lens is concave, and the optical axis region of the object-side surface of the seventh lens is concave, the overall distortion and aberrations of the optical imaging lens can be improved. And when the materials of the fourth to seventh lenses further satisfy V4+V5+V6+V7≦170.000, chromatic aberration can be effectively eliminated and unnecessary stray light reduced.

[0082] Third, in the optical imaging lens of this invention, when the first lens has a positive refractive index, it allows light rays at large angles to smoothly enter the optical imaging system. When the fourth lens has a positive refractive index, the circumferential region of the object-side surface of the fourth lens is convex, the optical axis region of the object-side surface of the sixth lens is convex, the optical axis region of the image-side surface of the sixth lens is concave, and the optical axis region of the object-side surface of the seventh lens is concave, the overall distortion and aberration of the optical imaging lens can be improved. When the materials of the fourth to seventh lenses satisfy V4+V5+V6+V7≦170.000, chromatic aberration and unnecessary stray light can be effectively eliminated. Combined with the D22t71 / D42t61≧3.600 ratio limit, the lens size can be effectively controlled, achieving a lightweight effect.

[0083] Fourth, the aspherical design of the lenses in the various embodiments of the present invention is more conducive to optimizing image quality.

[0084] Fifth, the selection of plastic material for the lenses in the various embodiments of the present invention helps to reduce weight, further reducing the weight of the optical imaging lens and saving costs.

[0085] 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: α 2≦A≦α 1 or β 2≦B≦β 1, where α 1 is the maximum value of optical parameter A in multiple embodiments, α 2 is the minimum value of optical parameter A in multiple embodiments, β 1 is the maximum value of optical parameter B in multiple embodiments, and β 2 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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 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; the first lens has a positive refractive index and a circumferential region of its object-side surface is convex; the second lens has a convex region of its object-side surface; the fourth lens has a positive refractive index and a convex region of its object-side surface; the fifth lens has a convex optical axis region of its image-side surface; the sixth lens has a convex optical axis region of its object-side surface and a concave optical axis region of its image-side surface; and the seventh lens has a concave optical axis region of its object-side surface; wherein, The optical imaging lens has only seven lenses, and satisfies V3+V4+V5+V6+V7≦195.000, where V3 is the Abbe number of the third lens, V4 is the Abbe number of the fourth 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; the lens surface has at least one transition point, the tangent of which is perpendicular to the optical axis, and the circumferential region is defined as the radially outward region from the transition point furthest from the optical axis to... An optical boundary region; when there is no transition point on the lens surface, the circumferential region is defined as 50% to 100% of the distance from the optical axis to the optical boundary on the lens surface; when a ray parallel to the optical axis passes through a region, if the ray is deflected toward the optical axis and the intersection point with the optical axis is located on the image side of the lens, then the region is a convex surface; when a ray parallel to the optical axis passes through a region, if the extension line of the ray intersects the optical axis at the object side of the lens, then the region is a concave surface.

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; the first lens has positive refractive index and a circumferential region of its object-side surface is convex; a circumferential region of the object-side surface of the third lens is concave; the fourth lens has positive refractive index and a circumferential region of its object-side surface is convex; an optical axis region of the object-side surface of the fifth lens is concave; an optical axis region of the image-side surface of the sixth lens is concave; and an optical axis region of the object-side surface of the seventh lens is concave; wherein, The optical imaging lens has only seven lenses, and satisfies V4+V5+V6+V7≦170.000, where V4 is the Abbe number of the fourth 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. When the lens surface has at least one transition point, the tangent of which is perpendicular to the optical axis, the circumferential region is defined as the area radially outward from the transition point furthest from the optical axis to an optical boundary. When there is no transition point on the lens surface, the circumferential region is defined as 50% to 100% of the distance from the optical axis to the optical boundary of the lens surface. When a ray parallel to the optical axis passes through a region, if the ray is deflected toward the optical axis and the intersection point with the optical axis is located on the image side of the lens, then the region is convex. When a ray parallel to the optical axis passes through a region, if the extension line of the ray intersects the optical axis on the object side of the lens, then the region is concave.

3. 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; the first lens has a positive refractive index; the fourth lens has a positive refractive index and a circumferential region of its object-side surface is convex; the sixth lens has an optical axis region of its object-side surface that is convex and an optical axis region of its image-side surface that is concave; and the seventh lens has an optical axis region of its object-side surface that is concave; wherein, The optical imaging lens has only seven lenses, satisfying V4+V5+V6+V7≦170.000 and D22t71 / D42t61≧3.600, where V4 is the Abbe number of the fourth lens, V5 is the Abbe number of the fifth lens, V6 is the Abbe number of the sixth lens, V7 is the Abbe number of the seventh lens, D22t71 is the distance on the optical axis from the image-side surface of the second lens to the object-side surface of the seventh lens, and D42t61 is the distance on the optical axis from the image-side surface of the fourth lens to the object-side surface of the sixth lens; the lens surface has at least one conversion point. The tangent at the conversion point is perpendicular to the optical axis. The circumferential region is defined as the area radially outward from the conversion point furthest from the optical axis to an optical boundary. When there is no conversion point on the lens surface, the circumferential region is defined as 50% to 100% of the distance from the optical axis to the optical boundary on the lens surface. When a ray parallel to the optical axis passes through a region, if the ray deflects toward the optical axis and the intersection with the optical axis is located on the image side of the lens, then the region is convex. When a ray parallel to the optical axis passes through a region, if the extension of the ray intersects the optical axis on the object side of the lens, then the region is concave.

4. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (EFL+TL) / ImgH≦3.000, where EFL is the effective focal length of the optical imaging lens, 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 ImgH is the image height of the optical imaging lens.

5. The optical imaging lens as claimed in any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: ImgH / Fno ≥ 3.000 mm, where ImgH is the image height of the optical imaging lens and Fno is the aperture value of the optical imaging lens.

6. The optical imaging lens as claimed in any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: ALT / Gmax ≤ 4.600, where ALT is the sum of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis, and Gmax is the maximum value of the six air gaps of the first lens to the seventh lens on the optical axis.

7. The optical imaging lens as claimed in any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (T6+G67) / T5≧2.900, 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, and T5 is the thickness of the fifth lens on the optical axis.

8. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: TTL / (T2+G45)≧9.900, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, T2 is the thickness of the second lens on the optical axis, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

9. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: Tmax / Tmin ≦ 3.500, 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.

10. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (TTL+ImgH) / BFL≧13.000, where TTL is the distance from the object-side surface of the first lens to an imaging surface on the optical axis, ImgH is the image height of the optical imaging lens, and BFL is the distance from the image-side surface of the seventh lens to the imaging surface on the optical axis.

11. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (TL+ImgH) / AAG≧3.850, 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, ImgH is the image height of the optical imaging lens, and AAG is the sum of the six air gaps on the optical axis from the first lens to the seventh lens.

12. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: EFL / Gmax ≤ 5.650, where EFL is the effective focal length of the optical imaging lens and Gmax is the maximum value of the six air gaps of the first lens to the seventh lens on the optical axis.

13. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (G45+T7) / T6≦1.500, where G45 is the air gap between the fourth lens and the fifth lens on the optical axis, T7 is the thickness of the seventh lens on the optical axis, and T6 is the thickness of the sixth lens on the optical axis.

14. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: ALT / (G12+G23+G67)≦2.500, wherein ALT is the sum of the thicknesses of the seven lenses from the first lens to the seventh lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, G23 is the air gap between the second lens and the third lens on the optical axis, and G67 is the air gap between the sixth lens and the seventh lens on the optical axis.

15. An optical imaging lens as claimed in any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (T1+T3) / (G12+G34+G45)≧2.200, where T1 is the thickness of the first lens on the optical axis, T3 is the thickness of the third lens on the optical axis, G12 is the air gap between the first lens and the second lens on the optical axis, G34 is the air gap between the third lens and the fourth lens on the optical axis, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

16. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (EFL+ImgH) / Tmax≧9.600, where EFL is the effective focal length of the optical imaging lens, ImgH is the image height of the optical imaging lens, and Tmax is the maximum value of the seven lens thicknesses of the first lens to the seventh lens on the optical axis.

17. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: ImgH / (AAG+BFL)≧1.200, where ImgH is the image height of the optical imaging lens, AAG is the sum of the six air gaps of the first lens to the seventh lens on the optical axis, and BFL is the distance from the image side of the seventh lens to an imaging surface on the optical axis.

18. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: TTL / Gmax ≤ 7.700, where TTL is the distance from the object side of the first lens to an imaging surface on the optical axis, and Gmax is the maximum value of the six air gaps from the first lens to the seventh lens on the optical axis.

19. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: (T5+G56+T7) / T1≦1.850, where 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, T7 is the thickness of the seventh lens on the optical axis, and T1 is the thickness of the first lens on the optical axis.

20. The optical imaging lens of any one of claims 1 to 3, wherein the optical imaging lens further satisfies the following formula: TL / (T4+G45)≧5.300, 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, T4 is the thickness of the fourth lens on the optical axis, and G45 is the air gap between the fourth lens and the fifth lens on the optical axis.

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