Optical imaging lens

Abstract

The present invention provides an optical imaging lens, which includes a first, a second, a third, a fourth and a fifth lens in order from the object side to the image side along the optical axis. Each of these lenses includes an object side surface facing the object side and allowing imaging light to pass through and an image side surface facing the image side and allowing imaging light to pass through. The first lens is the first lens having a refractive power from the object side to the image side, the second lens has a refractive power from the object side to the image side, the third lens has a refractive power from the object side to the image side, the fourth lens has a refractive power from the object side to the image side, and the fifth lens has a refractive power from the object side to the image side. The present invention shortens the distance that needs to be adjusted for focusing the optical imaging lens by controlling the formation of an adjustable air gap between two adjacent lenses and under the constraints of a conditional formula.

Description

Technical Field

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

[0002] The specifications of portable electronic products are changing with each passing day, and their key components - optical imaging lenses are also becoming more diversified. Their applications are not limited to shooting images and videos, but also to telephoto photography. With the demand for optical zoom in portable devices, the wide-angle lens can achieve the function of optical zoom. As the market's demand for optical zoom ratios in portable devices becomes higher and higher, the telephoto lens also requires a longer focal length.

[0003] The most common dual-lens portable electronic device is equipped with a wide-angle lens with an equivalent focal length of 26mm (equivalent focal length of f35mm) and a telephoto lens with an equivalent focal length of 52mm, which can achieve a double optical zoom function. The telephoto lens is designed to shoot objects from infinity to 1.200 meters away. Therefore, when the distance of the object to be shot is shortened from infinity to 1.200 meters, the telephoto lens needs to adjust the distance between the lens and the imaging surface through an actuator to adjust the position of the image distance for focusing.

[0004] According to the thin lens formula, as the focal length of the lens increases, the distance of the telephoto lens to adjust the distance between the lens and the imaging surface by the actuator will increase in a nonlinear ratio within the shooting range, that is, from infinity to 1.200 meters. For example, the distance of the telephoto lens with an f35mm equivalent focal length of 250mm within the shooting range can be nearly four times that of the telephoto lens with an f35mm equivalent focal length of 125mm, which is a huge difference from the distance required for the focus adjustment of the current wide-angle lens. In addition, the difference in heat energy generated by the standby and high-load computing of portable electronic devices also indirectly causes the operating environment of the lens to be not a stable temperature, which may cause the lens to produce additional focal length offset when focusing. Therefore, when the equivalent focal length design value of the telephoto lens exceeds five times the optical zoom and in the case of temperature fluctuations, the distance that the telephoto lens needs to adjust the focus within the shooting range will exceed the distance of the current actuator design, making it impossible for the telephoto lens to focus at the closest shooting distance to receive a clear image.

[0005] Therefore, in order to provide a telephoto lens with an equivalent focal length of f35mm and a magnification of more than five times optical zoom, the first problem faced is to overcome the insufficient distance of the current actuator design so that the telephoto lens can be shortened from the infinite distance to the distance of 1.200 meters for focusing. In addition, the longer the distance that the actuator can push, the less it meets the requirements of the thin and light size required by portable electronic devices. Therefore, in addition to improving the focusing problem of the telephoto lens, the overall volume must also be considered.

[0006] In addition, taking the f35mm equivalent focal length of a telephoto lens as 160mm, Fno as 3.5, and image height as 2.5mm as an example, the entrance pupil diameter of the lens will reach 5.291mm. With the lens barrel and other components installed outside the lens, even if the telephoto lens adopts a periscope design, it will be too large to be installed in a portable electronic device. Therefore, in addition to considering the focusing problem of a telephoto lens with a high optical zoom ratio, how to install the increased volume as the focal length becomes longer in a portable electronic device is also a problem that needs to be solved. Summary of the invention

[0007] One of the purposes of the present invention is to provide an optical imaging lens, in which an adjustable air gap is set between a pair of adjacent lenses, which can significantly reduce the distance that needs to be adjusted for focusing within the shooting range when telephoto, solve the situation where it is impossible to focus, and preferably provide a telephoto lens with a high optical zoom ratio that is suitable for the actuation distance of the current actuator design.

[0008] In order to conveniently represent the parameters referred to in the present invention, the following definitions are used in this specification and drawings: T1 represents the thickness of the first lens on the optical axis; G12 represents the distance on the optical axis from the image side surface of the first lens to the object side surface of the second lens; T2 represents the thickness of the second lens on the optical axis; G23 represents the distance on the optical axis from the image side surface of the second lens to the object side surface of the third lens; T3 represents the thickness of the third lens on the optical axis; G34 represents the distance on the optical axis from the image side surface of the third lens to the object side surface of the fourth lens; T4 represents the thickness of the fourth lens on the optical axis, G45 represents the distance from the image side of the fourth lens to the object side of the fifth lens on the optical axis, T5 represents the thickness of the fifth lens on the optical axis, G56 represents the distance from the image side of the fifth lens to the object side of the sixth lens on the optical axis, T6 represents the thickness of the sixth lens on the optical axis, G67 represents the distance from the image side of the sixth lens to the object side of the seventh lens on the optical axis, T7 represents the thickness of the seventh lens on the optical axis, G5F represents the distance from the image side of the fifth lens to the object side of the filter on the optical axis, G6F represents the distance from the image side of the sixth lens to the object side of the filter on the optical axis, G7F represents the distance from the image side of the seventh lens to the object side of the filter on the optical axis, TTF represents the thickness of the filter on the optical axis, GFP represents the air gap from the filter to the imaging plane on the optical axis, f1 represents the focal length of the first lens, f2 represents the focal length of the second lens, f3 represents the focal length of the third lens, f4 represents the focal length of the fourth lens, f5 represents the focal length of the fifth lens, f6 represents the focal length of the sixth lens, f7 represents the focal length of the seventh lens, n1 represents the refractive index of the first lens, n2 represents the refractive index of the second lens, n3 represents the refractive index of the third lens, n4 represents the refractive index of the fourth lens, n5 represents the refractive index of the fifth lens, n6 represents the refractive index of the sixth lens, n7 represents the refractive index of the seventh lens, V1 represents the Abbe number of the first lens, V2 represents the Abbe number of the second lens, V3 represents the Abbe number of the third lens, V4 represents the Abbe number of the fourth lens, V5 represents the Abbe number of the fifth lens, V6 represents the Abbe number of the sixth lens, V7 represents the Abbe number of the seventh lens, EFL represents the system focal length of the optical imaging lens, that is, the system focal length of the optical imaging lens focused at 20°C and at infinity, EFLA represents the system focal length of the optical imaging lens after adjusting the adjustable air gap, TL represents the distance from the object side of the first lens to the image side of the fifth lens on the optical axis, TTL represents the system length of the optical imaging lens,That is, the distance from the object side of the first lens to the imaging surface on the optical axis, ALT represents the sum of the thickness of the five lenses from the first lens to the fifth lens on the optical axis, AAG represents the sum of the four air gaps from the first lens to the fifth lens on the optical axis, BFL represents the distance from the image side of the fifth lens to the imaging surface on the optical axis, HFOV represents the half viewing angle of the optical imaging lens, ImgH represents the image height of the optical imaging lens, Fno represents the aperture value of the optical imaging lens, and fG is the focal length of the lens group from the object side to the first adjustable air gap. This first adjustable air gap is the first adjustable air gap from the object side to the image side in order.

[0009] According to an embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, the first lens to the fifth lens each including an object-side surface facing the object side and allowing imaging light to pass through and an image-side surface facing the image side and allowing imaging light to pass through, the first lens is the first lens having a refractive power counted from the object side to the image side, the second lens has a refractive power counted from the object side to the image side, the third lens has a refractive power counted from the object side to the image side, the fourth lens has a refractive power counted from the object side to the image side, the fifth lens has a refractive power counted from the object side to the image side, and the optical imaging lens has an adjustable air gap between two adjacent lenses. The optical imaging lens can satisfy any of the following conditional expressions:

[0010] 6.900≦EFL / ImgH Condition (1);

[0011] 6.400≦TTL / ImgH Condition (2);

[0012] HFOV / ImgH≦3.800° / mm Conditional formula (3).

[0013] Secondly, the present invention can selectively control the aforementioned parameters so that the optical imaging lens can further satisfy at least one of the following conditions:

[0014] 1.200≦EFL / fG Condition (4);

[0015] 2.000≦EFL / (Fno*ImgH) Conditional formula (5);

[0016] HFOV≦9.000° conditional expression (6);

[0017] EFL / BFL ≦ 2.800 Condition (7);

[0018] 1.400≦TTL / TL Condition (8);

[0019] 6.000≦TTL / T1 Condition (9);

[0020] 4.000≦TTL / (T2+G23+T3) Conditional formula (10);

[0021] 1.300≦ALT / AAG Condition (11);

[0022] 0.900≦(T1+G12+T3+G34) / (T4+G45+T5) Conditional formula (12);

[0023] 1.200≦(G23+T3+G34) / (T1+T2) Conditional formula (13);

[0024] 0.700≦(T4+G45+T5) / (T1+T2) Conditional formula (14);

[0025] (T1+G12+T2+T4+G45+T5) / (G23+T3+G34)≦2.500Condition (15); and / or

[0026] 0.800≦EFL / EFLA≦1.200 conditional expression (16).

[0027] The exemplary limiting conditional expressions listed above can also be arbitrarily and selectively combined in different numbers and applied to the implementation of the present invention, and are not limited thereto. When implementing the present invention, in addition to the above conditional expressions, other lens concave-convex surface arrangements, refractive index changes, selection of various materials or other details or additional structures can also be designed for a single lens or a plurality of lenses in a broad manner to enhance the control of the system volume, performance, resolution and / or manufacturing yield. For example, the optical imaging lens can additionally include a lens barrel, in which at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is placed, and a section parallel to the optical axis is formed on an outer surface of the lens barrel. Another example is that the optical imaging lens includes a concave surface on the image side of the first lens, a positive refractive index on the third lens, a negative refractive index on the fourth lens, a concave surface on the image side of the fourth lens, and a convex surface on the object side of the fifth lens. Another example is that in an optical imaging lens, the absolute value of the maximum distance difference before and after the adjustable air gap is adjusted is less than or equal to 1.000 mm, wherein the maximum distance difference before and after the adjustable air gap is adjusted is the distance of the adjustable air gap when the optical imaging lens is focused at 60°C and at a distance of 1.200 meters minus the distance of the adjustable air gap when the optical imaging lens is focused at 20°C and at infinity. Another example is that in an optical imaging lens, at least one of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens has a cut surface formed between the object side surface and the image side surface, wherein the optical boundary of the lens with the cut surface is different from the optical boundary of the lens without the cut surface. In addition, in terms of material design, all lenses of the optical imaging lens of the embodiment of the present invention can be lenses made of various transparent materials such as glass, plastic, resin, etc. It should be noted that these details need to be selectively combined and applied to other embodiments of the present invention without conflict.

[0028] According to another embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, wherein the first lens to the fifth lens each include an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, the first lens is the first lens having a refractive power counted from the object side to the image side, the second lens has a refractive power counted from the object side to the image side, the third lens has a refractive power counted from the object side to the image side, the fourth lens has a refractive power counted from the object side to the image side, the fifth lens has a refractive power counted from the object side to the image side, and the optical imaging lens has an adjustable air gap between two adjacent lenses and satisfies conditional formula (16). The optical imaging lens may satisfy any of the above conditional formulas (1) to (3).

[0029] According to another embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, wherein each of the first lens to the fifth lens includes an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, the first lens is the first lens having a refractive power counted from the object side to the image side, the second lens has a refractive power counted from the object side to the image side, the third lens has a refractive power counted from the object side to the image side, the fourth lens has a refractive power counted from the object side to the image side, and the fifth lens has a refractive power counted from the object side to the image side, and the optical imaging lens has an adjustable air gap between two adjacent lenses and satisfies that the absolute value of the maximum distance difference before and after the adjustable air gap is adjusted is less than or equal to 1.000 mm. The optical imaging lens can satisfy any of the above conditional expressions (1) to (3).

[0030] According to another embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, wherein the first lens to the fifth lens each include an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, the first lens is the first lens having a refractive power counted from the object side to the image side, the second lens has a refractive power counted from the object side to the image side, the third lens has a refractive power counted from the object side to the image side, the fourth lens has a refractive power counted from the object side to the image side, and the fifth lens has a refractive power counted from the object side to the image side, and the optical imaging lens has an adjustable air gap between two adjacent lenses and satisfies conditional formula (4). The optical imaging lens may satisfy any of the above conditional formulas (1) to (3).

[0031] According to another embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, the first lens to the fifth lens each including an object-side surface facing the object side and allowing imaging light to pass therethrough and an image-side surface facing the image side and allowing imaging light to pass therethrough, the first lens is a first lens having a refractive power counted from the object side to the image side, the second lens has a second lens having a refractive power counted from the object side to the image side, the third lens has a third lens having a refractive power counted from the object side to the image side, the fourth lens has a fourth lens having a refractive power counted from the object side to the image side, and the fifth lens has a fifth lens having a refractive power counted from the object side to the image side, and the optical imaging lens has an adjustable air gap between two adjacent lenses and further includes a lens barrel, in which at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is disposed, and a tangent plane parallel to the optical axis is formed on an outer surface of the lens barrel. The optical imaging lens can satisfy any one of the above conditions: conditional expression (4), conditional expression (16), or the absolute value of the maximum distance difference before and after the adjustable air gap is adjusted is less than or equal to 1.000 mm.

[0032] According to another embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence, wherein each of the first to fifth lenses includes an object-side surface facing the object side and allowing imaging light to pass therethrough, and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein the first lens is a first lens having a refractive power counted from the object side to the image side, the second lens is a second lens having a refractive power counted from the object side to the image side, the third lens is a third lens having a refractive power counted from the object side to the image side, the fourth lens is a fourth lens having a refractive power counted from the object side to the image side, and the fifth lens is a fifth lens having a refractive power counted from the object side to the image side, and the optical imaging lens has an adjustable air gap between two adjacent lenses, wherein at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens has a cut surface formed between the object-side surface and the image-side surface, wherein an optical boundary of the lens having the cut surface is different from an optical boundary of the lens without the cut surface. The optical imaging lens can satisfy any one of the above conditions: conditional expression (4), conditional expression (16), or the absolute value of the maximum distance difference before and after the adjustable air gap is adjusted is less than or equal to 1.000 mm.

[0033] According to another embodiment of the present invention, an optical imaging lens is provided, which includes five lenses along an optical axis from an object side to an image side, including a first lens, a second lens, a third lens, a fourth lens, and a fifth lens in sequence. The first lens to the fifth lens each include an object-side surface facing the object side and allowing imaging light to pass through, and an image-side surface facing the image side and allowing imaging light to pass through. The first lens is the first lens having a refractive power counted from the object side to the image side, and an optical axis region of the image-side surface of the first lens is a concave surface. The second lens is a lens having a refractive power counted from the object side to the image side, and an optical axis region of the image-side surface of the first lens is a concave surface. The optical imaging lens comprises a second lens having a refractive power from the object side to the image side, a third lens having a refractive power from the object side to the image side and the third lens has a positive refractive power, a fourth lens having a refractive power from the object side to the image side and the fourth lens has a negative refractive power and an optical axis region of the image side surface of the fourth lens is a concave surface, a fifth lens having a refractive power from the object side to the image side and an optical axis region of the object side surface of the fifth lens is a convex surface, and the optical imaging lens comprises an adjustable air gap between two adjacent lenses. The optical imaging lens may satisfy any of the above conditions: conditional expression (4), conditional expression (16) or the absolute value of the maximum distance difference before and after adjustment of the adjustable air gap is less than or equal to 1.000 mm.

[0034] From the above, it can be seen that the optical imaging lens of the present invention can significantly reduce the focus adjustment distance of the telephoto lens within the shooting range, thereby solving the problem of being unable to focus. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of a lens cross-sectional structure according to an embodiment of the present invention;

[0036] Figure 2 It is a schematic diagram of the relationship between the lens surface shape and the focus of light;

[0037] Figure 3 is a relationship diagram between the surface shape and the area boundary of the lens area of ​​Example 1;

[0038] Figure 4 is a relationship diagram between the surface shape and the area boundary of the lens area of ​​Example 2;

[0039] Figure 5 is a relationship diagram between the surface shape and the area boundary of the lens area of ​​Example 3;

[0040] Figure 6 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a first embodiment of the present invention;

[0041] Figure 7 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the first embodiment of the present invention;

[0042] Figure 8is a table diagram of detailed optical data of each lens of the optical imaging lens according to the first embodiment of the present invention;

[0043] Fig. 9 is a table diagram of aspherical surface data of the optical imaging lens according to the first embodiment of the present invention;

[0044] Fig.10 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the first embodiment of the present invention;

[0045] Fig.11 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a second embodiment of the present invention;

[0046] Fig.12 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the second embodiment of the present invention;

[0047] Fig.13 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the second embodiment of the present invention;

[0048] Fig.14 is a table diagram of aspherical surface data of the optical imaging lens according to the second embodiment of the present invention;

[0049] Fig.15 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the second embodiment of the present invention;

[0050] Fig.16 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a third embodiment of the present invention;

[0051] Fig.17 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the third embodiment of the present invention;

[0052] Fig.18 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the third embodiment of the present invention;

[0053] Fig.19 is a table diagram of aspherical surface data of the optical imaging lens according to the third embodiment of the present invention;

[0054] Fig. 20 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the third embodiment of the present invention;

[0055] Fig.21 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a fourth embodiment of the present invention;

[0056] Fig. 22 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the fourth embodiment of the present invention;

[0057] Fig.23 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the fourth embodiment of the present invention;

[0058] Fig.24 is a table diagram of aspherical surface data of the optical imaging lens according to the fourth embodiment of the present invention;

[0059] Fig.25 is data related to the temperature and the adjustable air gap of the optical imaging lens according to the fourth embodiment of the present invention;

[0060] Fig.26 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a fifth embodiment of the present invention;

[0061] Fig. 27 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the fifth embodiment of the present invention;

[0062] Fig.28 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the fifth embodiment of the present invention;

[0063] Fig.29 is a table diagram of aspherical surface data of the optical imaging lens according to the fifth embodiment of the present invention;

[0064] Fig.30 is data related to the temperature and the adjustable air gap of the optical imaging lens according to the fifth embodiment of the present invention;

[0065] Fig.31 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a sixth embodiment of the present invention;

[0066] Fig.32 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the sixth embodiment of the present invention;

[0067] Fig.33 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the sixth embodiment of the present invention;

[0068] Fig.34 is a table diagram of aspherical surface data of the optical imaging lens according to the sixth embodiment of the present invention;

[0069] Fig.35 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the sixth embodiment of the present invention;

[0070] Fig.36 is a schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a seventh embodiment of the present invention;

[0071] Fig.37 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the seventh embodiment of the present invention;

[0072] Fig.38 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the seventh embodiment of the present invention;

[0073] Fig.39 is a table diagram of aspherical surface data of the optical imaging lens according to the seventh embodiment of the present invention;

[0074] Fig.40 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the seventh embodiment of the present invention;

[0075] Fig.41 is a schematic cross-sectional structure diagram of a six-lens optical imaging lens according to an eighth embodiment of the present invention;

[0076] Fig.42 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the eighth embodiment of the present invention;

[0077] Fig.43 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the eighth embodiment of the present invention;

[0078] Fig.44 is a table diagram of aspherical surface data of the optical imaging lens according to the eighth embodiment of the present invention;

[0079] Fig.45 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the eighth embodiment of the present invention;

[0080] Fig.46 is a schematic cross-sectional structure diagram of a seven-lens optical imaging lens according to a ninth embodiment of the present invention;

[0081] Fig.47 is a schematic diagram of longitudinal spherical aberration and various aberration diagrams of the optical imaging lens according to the ninth embodiment of the present invention;

[0082] Fig.48 is a table diagram of detailed optical data of each lens of the optical imaging lens according to the ninth embodiment of the present invention;

[0083] Fig.49is a table diagram of aspherical surface data of the optical imaging lens according to the ninth embodiment of the present invention;

[0084] Fig.50 is a data table diagram of the correlation between the temperature and the adjustable air gap of the optical imaging lens according to the tenth embodiment of the present invention;

[0085] Fig.51 The parameters of the above nine embodiments and comparison tables of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2) and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) values ​​are systematically listed;

[0086] Fig.52 is a side view of an appearance of an optical imaging lens according to a tenth embodiment of the present invention;

[0087] Fig.53 is a front view of an optical imaging lens according to a tenth embodiment of the present invention;

[0088] Fig.54 The optical imaging lens according to the tenth embodiment of the present invention is Fig.53 A schematic cross-sectional view of the AA' direction;

[0089] Fig.55 The optical imaging lens according to the tenth embodiment of the present invention is Fig.53 A schematic cross-sectional view in the BB' direction;

[0090] Fig.56 FIG. 1 is a schematic diagram of an appearance of an optical imaging lens according to the eleventh embodiment of the present invention. DETAILED DESCRIPTION

[0091] Before starting to describe the present invention in detail, the symbols in the accompanying drawings are first clearly indicated: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 optical imaging lens; 100, 200, 300, 400, 500 lenses; 101, 102 bearing parts; 130 assembly part; 211, 212 parallel light rays; BA lens barrel; STO aperture; L1 first lens; L2 second lens; L3 third lens; L4 fourth lens; L5 fifth lens; L6 sixth lens; L7 seventh lens; TF filter; IMG imaging surface; 110, 410, 510, L1A1, L2A1, L3A1, L4A1, L5A1, L6A1, TFA1 object side; 120, 320, L1A2, L2A2, L3A2, L4A2, L5A2, L6A2, TFA2 image side; L1A3, L2A3, L3A3, L4A3, L5A3, BAA1 section; Z1, L1A1C, L1A2C, L2A1C, L2A2C, L3A1C, L3A2C, L4A1C, L4A2C, L5A1C, L5A2C, L6A1C, L6A2C, L7A1C, L7A2C optical axis area; Z2, L1A1P, L1A2P, L2A1P, L2A2P, L3A1P, L3A2P, L4A1P, L4A2P, L5A1P, L5A2P, L6A1P, L6A2P, L7A1P, L7A2P circumferential area; A1 object side; A2 image side; CP center point; CP1 first center point; CP2 second center point; TP1 first transition point; TP2 second transition point; OB optical boundary; I optical axis; Lc main ray; Lm marginal ray; EL extension line; Z3 relay area; M, R intersection point.

[0092] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person with ordinary knowledge in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0093] 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.

[0094] The optical system of this specification includes at least one lens, which receives the imaging light from the incident optical system that is parallel to the optical axis and within the half-viewing angle (HFOV) relative to the optical axis. The imaging light is imaged on the imaging surface through the optical system. The so-called "a lens has a positive refractive power (or a negative refractive power)" means that the paraxial refractive power of the lens calculated by Gaussian optical theory is positive (or negative). The so-called "object side (or image side) of the lens" is defined as a specific range where the imaging light passes through the lens surface. The imaging light includes at least two types of light: 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 areas according to different positions, including the optical axis area, the circumferential area, or one or more relay areas in some embodiments. The description of these areas will be explained in detail below.

[0095] Figure 1 is a radial cross-sectional view of the lens 100. Two reference points on the surface of the lens 100 are defined: a center point and a transition point. The center point of the lens surface is an intersection point of the surface and the optical axis I. Figure 1 As shown in the example, the first center point CP1 is located at the object side surface 110 of the lens 100, and the second center point CP2 is located at the image side surface 120 of the lens 100. A conversion point is a point on the lens surface, and the tangent of the point is perpendicular to the optical axis I. The optical boundary OB of the lens surface is defined as the point where the radially outermost edge ray Lm passing through the lens surface intersects the lens surface. All conversion points are located between the optical axis I and the optical boundary OB of the lens surface. In addition, if a single lens surface has multiple conversion points, the conversion points are named in sequence from the first conversion point in the radial outward direction. For example, the first conversion point TP1 (closest to the optical axis I), the second conversion point TP2 (closest to the optical axis I), and the second conversion point TP2 (closest to the optical axis I). Figure 4 as shown) and the Nth conversion point (farthest from the optical axis I).

[0096] The range from the center point to the first transition point TP1 is defined as the optical axis area, wherein the optical axis area includes the center point. The area from the Nth transition point farthest from the optical axis I to the optical boundary OB is defined as the circumferential area. In some embodiments, a relay area between the optical axis area and the circumferential area may be further included, and the number of relay areas depends on the number of transition points.

[0097] When a light ray parallel to the optical axis I passes through an area, if the light ray is deflected toward the optical axis I and the intersection with the optical axis I is located at the image side A2 of the lens, then the area is convex. When a light ray parallel to the optical axis I passes through an area, if the intersection of the extended line of the light ray and the optical axis I is located at the object side A1 of the lens, then the area is concave.

[0098] In addition, see Figure 1The lens 100 may further include an assembly portion 130 extending radially outward from the optical boundary OB. The assembly portion 130 is generally used for assembling the lens 100 to a corresponding component (not shown) of the optical system. The imaging light does not reach the assembly portion 130. The structure and shape of the assembly portion 130 are merely examples for illustrating the present invention and are not intended to limit the scope of the present invention. The assembly portion 130 of the lens discussed below may be partially or completely omitted in the drawings.

[0099] See also Figure 2 , define the area between the center point CP and the first transition point TP1 as the optical axis area Z1. Define the area between the first transition point TP1 and the optical boundary OB of the lens surface as the circumferential area Z2. Figure 2 As shown, after passing through the optical axis region Z1, the parallel light 211 intersects with the optical axis I at the image side A2 of the lens 200, that is, the focus of the parallel light 211 passing through the optical axis region Z1 is located at point R on the image side A2 of the lens 200. Since the light intersects with the optical axis I at the image side A2 of the lens 200, the optical axis region Z1 is a convex surface. On the contrary, the parallel light 212 diverges after passing through the circumferential region Z2. Figure 2 As shown, the extended line EL of the parallel light 212 after passing through the circumferential area Z2 intersects with the optical axis I at the object side A1 of the lens 200, that is, the focus of the parallel light 212 passing through the circumferential area Z2 is located at point M on the object side A1 of the lens 200. Since the extended line EL of the light intersects with the optical axis I at the object side A1 of the lens 200, the circumferential area Z2 is a concave surface. Figure 2 In the lens 200 shown, the first transition point TP1 is the boundary between the optical axis area and the circumferential area, that is, the first transition point TP1 is the boundary point where the convex surface turns into the concave surface.

[0100] On the other hand, the surface convexity of the optical axis area can also be determined according to the judgment method of the general knowledgeable person in the field, that is, the convexity of the surface shape of the optical axis area of ​​the lens can be determined by the positive and negative signs of the curvature radius of the paraxial axis (abbreviated as R value). R value can be commonly used in optical design software, such as Zemax or CodeV. R value is also commonly found in the lens data sheet of optical design software. For the object side, when the R value is positive, the optical axis area of ​​the object side is determined to be convex; when the R value is negative, the optical axis area of ​​the object side is determined to be concave. On the contrary, for the image side, when the R value is positive, the optical axis area of ​​the image side is determined to be concave; when the R value is negative, the optical axis area of ​​the image side is determined to be convex. The result of this method is consistent with the result of the above-mentioned determination method by the intersection of the light ray / light extension line and the optical axis. The determination method of the intersection of the light ray / light extension line and the optical axis is to determine the surface convexity by the focus of a light ray parallel to the optical axis located on the object side or image side of the lens. The terms “a region is convex (or concave)”, “a region is convex (or concave)” or “a convex (or concave) region” described in this specification can be used interchangeably.

[0101] Figures 3 to 5 Examples are provided for determining the surface shape and area boundaries of lens areas in various situations, including the aforementioned optical axis area, circumferential area, and relay area.

[0102] Figure 3 is a radial cross-sectional view of the lens 300. Figure 3 , the image side surface 320 of the lens 300 has only one transition point TP1 within the optical boundary OB. The optical axis area Z1 and the circumferential area Z2 of the image side surface 320 of the lens 300 are as follows: Figure 3 The R value of the image-side surface 320 is positive (ie, R>0), and therefore, the optical axis region Z1 is a concave surface.

[0103] Generally speaking, the shapes of the areas bounded by the conversion point are opposite to those of the adjacent areas. Therefore, the conversion point can be used to define the transition of the surface shape, that is, from concave to convex or from convex to concave. Figure 3 In the figure, since the optical axis area Z1 is a concave surface, the surface shape changes at the transition point TP1, so the circumferential area Z2 is a convex surface.

[0104] Figure 4 is a radial cross-sectional view of the lens 400. Figure 4 , there is a first transition point TP1 and a second transition point TP2 on the object side surface 410 of the lens 400. The area between the optical axis I and the first transition point TP1 is defined as an optical axis region Z1 of the object side surface 410. The R value of the object side surface 410 is positive (ie, R>0), and therefore, the optical axis region Z1 is a convex surface.

[0105] The area between the second transition point TP2 and the optical boundary OB of the object side surface 410 of the lens 400 is defined as a circumferential area Z2, and the circumferential area Z2 of the object side surface 410 is also a convex surface. In addition, the area between the first transition point TP1 and the second transition point TP2 is defined as a relay area Z3, and the relay area Z3 of the object side surface 410 is a concave surface. Figure 4 The object side surface 410 includes, radially outward from the optical axis I, an optical axis region Z1 between the optical axis I and the first conversion point TP1, a relay region Z3 between the first conversion point TP1 and the second conversion point TP2, and a circumferential region Z2 between the second conversion point TP2 and the optical boundary OB of the object side surface 410 of the lens 400. Since the optical axis region Z1 is a convex surface, the surface shape changes from the first conversion point TP1 to a concave surface, so the relay region Z3 is a concave surface, and the surface shape changes from the second conversion point TP2 to a convex surface, so the circumferential region Z2 is a convex surface.

[0106] Figure 5is a radial cross-sectional view of the lens 500. The object side surface 510 of the lens 500 has no transition point. For a lens surface without a transition point, such as the object side surface 510 of the lens 500, 0 to 50% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the optical axis area, and 50 to 100% of the distance from the optical axis I to the optical boundary OB of the lens surface is defined as the circumferential area. Figure 5 The lens 500 shown in the figure defines the optical axis region Z1 of the object side surface 510 as 50% of the distance from the optical axis I to the optical boundary OB of the lens 500 surface. The R value of the object side surface 510 is positive (i.e., R>0), so the optical axis region Z1 is a convex surface. Since the object side surface 510 of the lens 500 has no transition point, the circumferential region Z2 of the object side surface 510 is also a convex surface. The lens 500 may further have an assembly portion (not shown) extending radially outward from the circumferential region Z2.

[0107] The optical imaging lens of the present invention has at least five lenses with refractive power arranged along an optical axis from the object side to the image side, which include a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence. When there are more lenses with refractive power, the lenses can be named in order from the object side to the image side after the fifth lens. For example, when seven lenses are arranged, a sixth lens and a seventh lens are further included in the order from the object side to the image side after the fifth lens. Each of these lenses with refractive power includes an object side surface facing the object side and allowing imaging light to pass through, and an image side surface facing the image side and allowing imaging light to pass through. The optical imaging lens of the present invention can greatly reduce the distance that needs to be adjusted for focusing within the shooting range when telephoto by designing an adjustable air gap between two adjacent lenses and satisfying at least one parameter value range, thereby solving the situation where focusing cannot be achieved. Preferably, it can be applied to the distance of the current actuator design to provide a telephoto lens with a high optical zoom ratio.

[0108] When the optical imaging lens provided by an embodiment of the present invention has an adjustable air gap between lenses and satisfies the conditional expressions of 6.900≦EFL / ImgH, 6.400≦TTL / ImgH or HFOV / ImgH≦3.800° / mm, it is helpful to overcome the distance limitation of the current actuator design, and the distance of the lens and the imaging plane can be adjusted in the range of infinity to 1.200 meters by adjusting the distance of the adjustable air gap instead of adjusting the focusing distance, so that the optical imaging lens can be used as a telephoto lens and focus by the actuator. Preferably, the optical imaging lens can further satisfy 7.300≦EFL / ImgH, 6.700≦TTL / ImgH or HFOV / ImgH≦3.100° / mm, which is helpful to increase the equivalent focal length of the telephoto lens to improve the optical zoom ratio. Optimally, 7.300≦EFL / ImgH≦14.000, 6.700≦TTL / ImgH≦16.000 or 1.600° / mm≦HFOV / ImgH≦3.100° / mm can be further satisfied, which will help avoid the equivalent focal length being too long so that the overall volume is too large to be disposed in a portable electronic device.

[0109] An optical imaging lens provided by an embodiment of the present invention has an adjustable air gap between lenses. If the air gap satisfies 0.800≦EFL / EFLA≦1.200 and satisfies 6.900≦EFL / ImgH, 6.400≦TTL / ImgH or HFOV / ImgH≦3.800° / mm, it will be helpful to overcome the distance limitation of the current actuator design. The distance of the adjustable air gap is adjusted instead of the focusing distance of adjusting the distance between the lens and the imaging plane, so that the telephoto lens can be focused by the actuator within the distance range of infinity to 1.200 meters, and the volume of the actuator can be reduced by limiting the ratio of the system focal length before and after the adjustment of the adjustable air gap. Preferably, the optical imaging lens further satisfies 0.900≦EFL / EFLA≦1.100, 7.300≦EFL / ImgH, 6.700≦TTL / ImgH or HFOV / ImgH≦3.100° / mm, which is conducive to increasing the equivalent focal length of the telephoto lens to improve the optical zoom ratio. Optimally, the optical imaging lens further satisfies 0.950≦EFL / EFLA≦1.050, 7.300≦EFL / ImgH≦14.000, 6.700≦TTL / ImgH≦16.000 or 1.600° / mm≦HFOV / ImgH≦3.100° / mm, which helps to avoid the equivalent focal length being too long so that the overall volume is too large to be set in a portable electronic device.

[0110] An optical imaging lens provided by an embodiment of the present invention has an adjustable air gap between lenses, wherein the absolute value of the distance difference before and after the adjustable air gap is adjusted is less than or equal to 1.000 mm and satisfies the condition of 6.900≦EFL / ImgH, 6.400≦TTL / ImgH or HFOV / ImgH≦3.800° / mm. This is beneficial for overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging plane, so that the telephoto lens can be focused by the actuator within the distance range from infinity to 1.200 meters, and the size of the actuator can be reduced by limiting the absolute value of the distance difference before and after the adjustable air gap is adjusted. Preferably, the optical imaging lens can further satisfy that the absolute value of the distance difference before and after the adjustable air gap is adjusted is less than or equal to 0.500mm, 7.300≦EFL / ImgH, 6.700≦TTL / ImgH or HFOV / ImgH≦3.100° / mm, which will help increase the equivalent focal length of the telephoto lens to improve the optical zoom ratio. Optimally, the optical imaging lens can further satisfy that the absolute value of the distance difference before and after the adjustable air gap is adjusted is less than or equal to 0.400mm, 7.300≦EFL / ImgH≦14.000, 6.700≦TTL / ImgH≦16.000 or 1.600° / mm≦HFOV / ImgH≦3.100° / mm, which will help avoid the equivalent focal length being too long so that the overall volume is too large to be set in a portable electronic device.

[0111] An optical imaging lens provided by an embodiment of the present invention has an adjustable air gap between lenses. When the conditional expression 1.200≦EFL / fG is satisfied and 6.900≦EFL / ImgH, 6.400≦TTL / ImgH or HFOV / ImgH≦3.800° / mm is satisfied, it is helpful to overcome the distance limitation of the current actuator design. The distance of the adjustable air gap is adjusted instead of the focusing distance of adjusting the distance between the lens and the imaging plane, so that the telephoto lens can be focused by the actuator within the distance range from infinity to 1.200 meters. Moreover, when the EFL / fG ratio is larger, the distance that the adjustable air gap needs to be adjusted is smaller. Preferably, the optical imaging lens can further meet 1.200≦EFL / fG≦3.000, 7.300≦EFL / ImgH, 6.700≦TTL / ImgH or HFOV / ImgH≦3.100° / mm, which is conducive to increasing the equivalent focal length of the telephoto lens to improve the optical zoom ratio. Optimally, the optical imaging lens can further meet 1.500≦EFL / fG≦3.000, 7.300≦EFL / ImgH≦14.000, 6.700≦TTL / ImgH≦16.000 or 1.600° / mm≦HFOV / ImgH≦3.100° / mm, which will help avoid the equivalent focal length being too long so that the overall volume is too large to be set in a portable electronic device.

[0112] An optical imaging lens provided by an embodiment of the present invention includes a lens barrel with a cut surface and an adjustable air gap between lenses. When the lens barrel meets 0.800≦EFL / EFLA≦1.200, and the absolute value of the distance difference before and after the adjustment of the adjustable air gap is less than or equal to 1.000 mm or 1.200≦EFL / fG, it is helpful to overcome the distance limitation of the current actuator design. The distance of the adjustable air gap is adjusted instead of the focusing distance of adjusting the distance between the lens and the imaging surface, so that the telephoto lens can be focused by the actuator within the distance range from infinity to 1.200 meters, and the volume of the telephoto lens can be reduced by the lens barrel design with a cut surface.

[0113] An optical imaging lens provided by an embodiment of the present invention includes a lens with a facet and an adjustable air gap between the lenses. When 0.800≦EFL / EFLA≦1.200 is satisfied, and the absolute value of the distance difference before and after the adjustment of the adjustable air gap is less than or equal to 1.000 mm or 1.200≦EFL / fG, it is advantageous to overcome the distance limitation of the current actuator design, and the distance of the adjustable air gap is adjusted instead of the focusing distance of adjusting the distance between the lens and the imaging surface, so that the telephoto lens can be focused by the actuator within the distance range from infinity to 1.200 meters, and the volume of the telephoto lens can be reduced by the facet lens design.

[0114] The optical imaging lens provided by an embodiment of the present invention may further include a first lens having an optical axis region of a concave surface on the image side, a fourth lens having an optical axis region of a concave surface on the image side, and a fifth lens having an optical axis region of a convex surface on the object side, and an adjustable air gap between the lenses. When the third lens has a positive refractive power and the fourth lens has a negative refractive power, and when 0.800≦EFL / EFLA≦1.200 is satisfied and the absolute value of the distance difference before and after adjustment of the adjustable air gap is less than or equal to 1.000 mm or 1.200≦EFL / fG, it is beneficial to overcome the distance limitation of the current actuator design, and the distance of the adjustable air gap is adjusted instead of the focusing distance of adjusting the distance between the lens and the imaging surface, so that the telephoto lens can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0115] When the optical imaging lens provided in an embodiment of the present invention further satisfies HFOV≦9.000° and is combined with the surface shape restriction, it is beneficial to increase the equivalent focal length of the telephoto lens. The preferred restriction is HFOV≦8.600°, and the best restriction is 4.000°≦ HFOV≦8.600°, thereby avoiding the equivalent focal length being too long and resulting in a volume that is too large to be installed in a portable electronic device.

[0116] The optical imaging lens provided in an embodiment of the present invention further satisfies V1>V2+V4, V3>V2+V4 or V5>V2+V4, which is beneficial to correcting the chromatic aberration of the optical imaging lens.

[0117] When the optical imaging lens provided by an embodiment of the present invention has only five lenses with a refractive power, it is beneficial to improve the yield and reduce the manufacturing cost; the preferred limitation is that the optical imaging lens has more than six lenses with a refractive power, which is beneficial to increase the f35 equivalent focal length and improve the imaging quality; the best limitation is that the optical imaging lens has no more than seven lenses with a refractive power, which is beneficial to control the yield to a certain extent to increase the f35 equivalent focal length and improve the imaging quality.

[0118] In order to maintain the thickness and spacing of each lens at an appropriate value, to avoid any parameter being too large and thus detrimental to the overall thinning of the optical imaging lens, or to avoid any parameter being too small and thus affecting assembly or increasing the difficulty of manufacturing, the optical imaging lens provided by an embodiment of the present invention can further satisfy at least one of the following conditions:

[0119] EFL / BFL≦2.800, the better limit is 1.200≦EFL / BFL≦2.800;

[0120] 1.400≦TTL / TL, the better limit is 1.400≦TTL / TL≦2.700;

[0121] 6.000≦TTL / T1, the better limit is 6.000≦TTL / T1≦150.000;

[0122] 4.000≦TTL / (T2+G23+T3), the better limit is 4.000≦TTL / (T2+G23+T3)≦14.000;

[0123] 1.600≦ALT / AAG, the better limit is 1.600≦ALT / AAG≦8.600;

[0124] 0.900≦(T1+G12+T3+G34) / (T4+G45+T5), the better limit is 0.900≦(T1+G12+T3+G34) / (T4+G45+T5)≦4.000;

[0125] 1.200≦(G23+T3+G34) / (T1+T2), the better limit is 1.200≦(G23+T3+G34) / (T1+T2)≦11.000;

[0126] 0.700≦(T4+G45+T5) / (T1+T2), the better limit is 0.700≦(T4+G45+T5) / (T1+T2)≦4.200;

[0127] (T1+G12+T2+T4+G45+T5) / (G23+T3+G34)≦2.500. The better limit is 0.500≦(T1+G12+T2+T4+G45+T5) / (G23+T3+G34)≦2.500.

[0128] In view of the unpredictability of optical system design, under the framework of the present invention, when the above-mentioned conditional expressions are met, the imaging quality of the optical imaging lens of the present invention can be improved, the f35 equivalent focal length can be increased, the system length can be shortened, the aperture value can be reduced, and / or the assembly yield can be improved.

[0129] When implementing the present invention, in addition to the above conditional expressions, other lens concave-convex surface arrangements, refractive index changes or other details or additional structures may be additionally designed for a single lens or for multiple lenses in a broad manner as in the following embodiments, so as to enhance the control of system volume, performance, resolution and / or improve the manufacturing yield. For example, the optical imaging lens may additionally include a lens barrel, in which at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is disposed, and a section parallel to the optical axis is formed on an outer surface of the lens barrel. Another example is that the optical imaging lens includes a concave surface in an optical axis region of the image side surface of the first lens, a positive refractive index of the third lens, a negative refractive index of the fourth lens, a concave surface in an optical axis region of the image side surface of the fourth lens, and a convex surface in an optical axis region of the object side surface of the fifth lens. Another example is that in the optical imaging lens, the absolute value of the maximum distance difference before and after the adjustable air gap is adjusted is less than or equal to 1.000 mm. Another example is that in an optical imaging lens, at least one of the first lens, the second lens, the third lens, the fourth lens, and the fifth lens has a cut surface formed between the object side surface and the image side surface, wherein the optical boundary of the lens with the cut surface is different from the optical boundary of the lens without the cut surface. In addition, in terms of material design, all lenses of the optical imaging lens of the embodiment of the present invention can be made of various transparent materials such as glass, plastic, resin, etc. It should be noted that these details need to be selectively combined and applied to other embodiments of the present invention without conflict, and are not limited to this.

[0130] In order to illustrate that the present invention can indeed provide good optical performance while increasing the field of view and reducing the aperture value, the following provides a number of embodiments and their detailed optical data. Figures 6 to 9 ,in Figure 6 A schematic diagram showing the cross-sectional structure of a five-lens optical imaging lens according to the first embodiment of the present invention is shown. Figure 7 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the first embodiment of the present invention. Figure 8 Displays detailed optical data of the optical imaging lens according to the first embodiment of the present invention, Fig. 9 The aspheric surface data of each lens of the optical imaging lens according to the first embodiment of the present invention are displayed. Fig.10 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the first embodiment of the present invention are shown, wherein the distance difference between the adjustable air gap before and after adjustment is the distance of the adjustable air gap at which the optical imaging lens focuses at different temperatures and different distances minus the distance of the adjustable air gap at which the optical imaging lens focuses at 20°C and at infinity.

[0131] like Figure 6As shown, the optical imaging lens 1 of this embodiment includes an aperture stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in order from the object side A1 to the image side A2. A filter TF and an imaging surface IMG of an image sensor are both disposed on the image side A2 of the optical imaging lens 1. In this embodiment, the filter TF is an IR cut filter and is disposed between the fifth lens L5 and the imaging surface IMG. The filter TF filters out wavelengths of a specific band from the light passing through the optical imaging lens 1, for example, filtering out the infrared light band, so that the wavelengths of the infrared light band will not be imaged on the imaging surface IMG.

[0132] The first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 and the fifth lens L5 of the optical imaging lens 1 are exemplarily made of plastic material, but are not limited thereto and may also be made of other transparent materials, such as glass and resin.

[0133] The first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 have a detailed structure as follows: the first lens L1 has a positive refractive power, and has an object-side surface L1A1 facing the object side A1 and an image-side surface L1A2 facing the image side A2. The optical axis region L1A1C of the object-side surface L1A1 is a convex surface and the circumferential region L1A1P is a convex surface. The optical axis region L1A2C of the image-side surface L1A2 is a concave surface and the circumferential region L1A2P is a concave surface.

[0134] The second lens L2 has a negative refractive power and has an object-side surface L2A1 facing the object side A1 and an image-side surface L2A2 facing the image side A2. The optical axis region L2A1C of the object-side surface L2A1 is a convex surface and the circumferential region L2A1P thereof is a concave surface. The optical axis region L2A2C of the image-side surface L2A2 is a concave surface and the circumferential region L2A2P thereof is a concave surface.

[0135] The third lens L3 has a positive refractive power and has an object-side surface L3A1 facing the object side A1 and an image-side surface L3A2 facing the image side A2. The optical axis region L3A1C of the object-side surface L3A1 is a convex surface and the circumferential region L3A1P thereof is a convex surface. The optical axis region L3A2C of the image-side surface L3A2 is a concave surface and the circumferential region L3A2P thereof is a concave surface.

[0136] The fourth lens L4 has a negative refractive power and has an object-side surface L4A1 facing the object side A1 and an image-side surface L4A2 facing the image side A2. The optical axis region L4A1C of the object-side surface L4A1 is a convex surface and the circumferential region L4A1P thereof is a concave surface. The optical axis region L4A2C of the image-side surface L4A2 is a concave surface and the circumferential region L4A2P thereof is a concave surface.

[0137] The fifth lens L5 has a positive refractive power and has an object-side surface L5A1 facing the object side A1 and an image-side surface L5A2 facing the image side A2. The optical axis region L5A1C of the object-side surface is a convex surface and the circumferential region L5A1P thereof is a concave surface. The optical axis region L5A2C of the image-side surface L5A2 is a convex surface and the circumferential region L5A2P thereof is a convex surface.

[0138] In this embodiment, air gaps are designed to exist between each lens L1, L2, L3, L4, L5, the filter TF and the imaging surface IMG of the image sensor, but this is not limited to this. In other embodiments, the surface profiles of any two opposing lenses can be designed to correspond to each other and fit together to eliminate the air gaps therebetween. In the optical imaging lens 1, the air gap between two adjacent third lens L3 and fourth lens L4 and the air gap between the fifth lens L5 and the filter TF are adjustable air gaps, that is, the distance G34 on the optical axis from the image side surface L3A2 of the third lens L3 to the object side surface L4A1 of the fourth lens L4 and the distance G5F on the optical axis from the image side surface L5A2 of the fifth lens L5 to the object side surface TFA1 of the filter TF can be adjusted. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into three lens groups, the first lens group includes the first lens L1, the second lens L2, and the third lens L3, the second lens group includes the fourth lens L4 and the fifth lens L5, and the third lens group includes the filter TF to the imaging surface IMG, and when the optical imaging lens 1 is focused, the second lens group is controlled by an actuator such as a voice coil motor to move relatively along the optical axis to adjust the adjustable air gaps G34 and G5F at the same time. Therefore, when adjusting G34 and G5F, reducing G34 corresponds to increasing G5F or increasing G34 corresponds to reducing G5F, and other air gaps, such as G12, G23, G45, etc., are not adjusted.

[0139] For the optical characteristics and distance values ​​of each lens in the optical imaging lens 1 of this embodiment, please refer to Figure 8 For the values ​​of the conditional formulas EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34), please refer to Fig.51 .

[0140] The object-side surface L1A1 and the image-side surface L1A2 of the first lens L1, the object-side surface L2A1 and the image-side surface L2A2 of the second lens L2, the object-side surface L3A1 and the image-side surface L3A2 of the third lens L3, the object-side surface L4A1 and the image-side surface L4A2 of the fourth lens L4, and the object-side surface L5A1 and the image-side surface L5A2 of the fifth lens L5, a total of ten aspheric surfaces, are defined according to the following aspheric curve formula:

[0141] Y represents the vertical distance between a point on the aspheric surface and the optical axis; Z represents the depth of the aspheric surface (the vertical distance between a point on the aspheric surface that is Y away from the optical axis and the tangent plane that is tangent to the vertex on the aspheric optical axis); R represents the radius of curvature of the lens surface near the optical axis; K is the conic constant; a i is the i-th order aspheric coefficient. Please refer to the detailed data of the parameters of each aspheric surface. Fig. 9 .

[0142] Figure 7 (a) is a schematic diagram of the longitudinal spherical aberration of this embodiment, where the horizontal axis represents the longitudinal spherical aberration and the vertical axis represents the field of view. Figure 7 (b) is a schematic diagram showing the field curvature aberration in the sagittal direction of this embodiment, Figure 7 (c) is a schematic diagram showing the field curvature aberration in the tangential direction of this embodiment, where the horizontal axis represents the field curvature aberration and the vertical axis represents the image height. Figure 7 (d) shows a schematic diagram of the distortion aberration of this embodiment, with the horizontal axis being the percentage and the vertical axis being the image height. The off-axis light rays at different heights of three representative wavelengths (470nm, 555nm, 650nm) are all concentrated near the imaging point. The deflection amplitude of each curve shows that the imaging point deviation of the off-axis light rays at different heights is controlled within -0.01 to 0.03mm, which significantly improves the spherical aberration of different wavelengths. The field curvature aberration in the sagittal direction falls within -0.02 to 0.025 mm, the field curvature aberration in the tangential direction falls within -0.01 to 0.035 mm, and the distortion aberration is maintained within 0 to 1.4%. From the above data, it can be seen that the various optical characteristics of the optical imaging lens 1 have met the imaging quality requirements of the optical system.

[0143] In addition, from Figure 8 It can be seen that the optical imaging lens 1 of this embodiment provides an f35 equivalent focal length of 149.878 mm, and when used with a wide-angle lens, it can effectively provide a larger optical zoom ratio than existing optical lenses. Fig.10From the data related to the temperature and the adjustable air gap shown in the figure, it can be seen that even if the temperature varies between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is only within 0.276 mm. This helps to overcome the distance limitation of the current actuator design, and to adjust the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 1 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0144] refer to Figures 11 to 15 , Fig.11 A schematic diagram showing the cross-sectional structure of a five-lens optical imaging lens according to a second embodiment of the present invention is shown. Fig.12 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the second embodiment of the present invention. Fig.13 Displays detailed optical data of the optical imaging lens according to the second embodiment of the present invention. Fig.14 The aspheric surface data of each lens of the optical imaging lens according to the second embodiment of the present invention are displayed. Fig.15 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the second embodiment of the present invention are shown. Fig.11 As shown in , the optical imaging lens 2 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the object side A1 to the image side A2.

[0145] The surface concavo-convex configurations of the object-side surfaces L1A1, L2A1, L3A1, L5A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L4A2, L5A2 facing the image side A2 of the second embodiment and the positive and negative refractive power configurations of each lens are substantially similar to those of the first embodiment, except that the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters of the second embodiment and the surface concavo-convex configurations of the object-side surface L4A1 and the image-side surface L3A2 and the position of the adjustable air gap are different from those of the first embodiment, and the first lens L1 of this embodiment is made of glass. In order to show the drawings more clearly, only the optical axis region and the circumferential region where the surface concavo-convex configurations are different from those of the first embodiment are marked, and the numbers of the optical axis region and the circumferential region where the surface concavo-convex configurations are the same are omitted, and each of the following embodiments also only marks the optical axis region and the circumferential region where the surface concavo-convex configurations of the lens are different from those of the first embodiment, omitting the numbers of the same parts and not repeating them. Specifically, the difference in the surface concave-convex configuration is that the optical axis region L3A2C of the image side surface L3A2 of the third lens L3 is a convex surface, and the optical axis region L4A1C of the object side surface L4A1 of the fourth lens L4 is a concave surface. In the optical imaging lens 1, the air gaps between the two adjacent first lenses L1 and second lenses L2 and the two adjacent third lenses L3 and fourth lenses L4 are all adjustable air gaps, that is, G12 and G34 can be adjusted. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into three lens groups, the first lens group includes the first lens L1, the second lens group includes the second lens L2 and the third lens L3, and the third lens group includes the fourth lens L4, the fifth lens L5, the filter TF to the imaging surface IMG, and when the optical imaging lens 1 is focused, the second lens group is controlled by an actuator such as a voice coil motor to move relatively along the optical axis to simultaneously adjust the adjustable air gaps G12 and G34. Therefore, when adjusting G12 and G34, reducing G12 corresponds to increasing G34 or increasing G12 corresponds to reducing G34, and other air gaps, such as G23, G45, G5F, etc., are not adjusted. For the optical characteristics of each lens and the values ​​of each distance of the optical imaging lens 2 of this embodiment, please refer to Fig.12 The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51.

[0146] from Fig.12 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.015 to 0.025 mm, as can be seen from the deflection amplitude of each curve. Fig.12 In the field curvature aberration in the sagittal direction of (b), the three representative wavelength changes fall within the range of -0.025 to 0.02 mm. Fig.12 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.03 to 0.02 mm. Fig.12 (d) shows that the distortion aberration of the optical imaging lens 2 is maintained in the range of 0 to 0.45%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller. From the above data, it can be seen that the various optical properties of the optical imaging lens 2 have met the imaging quality requirements of the optical system.

[0147] In addition, from Fig.13 It can be seen that the optical imaging lens 2 of this embodiment provides a better f35 equivalent focal length of 161.746mm than the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens compared to existing optical lenses. Fig.15 It can be seen from the data related to the temperature and the adjustable air gap that since the first lens L1 of this embodiment is made of glass, its temperature stability is higher. Even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is better controlled within 0.125 mm than the first embodiment. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 2 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0148] refer to Figures 16 to 20 ,in Fig.16 A schematic diagram showing the cross-sectional structure of a five-lens optical imaging lens according to a third embodiment of the present invention is shown. Fig.17 The diagram schematically shows various aberrations of the optical imaging lens according to the third embodiment of the present invention. Fig.18 Displays detailed optical data of the optical imaging lens according to the third embodiment of the present invention. Fig.19 The aspherical surface data of each lens of the optical imaging lens according to the third embodiment of the present invention are displayed. Fig. 20 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the third embodiment of the present invention are shown. Fig.16As shown in , the optical imaging lens 3 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the object side A1 to the image side A2.

[0149] The concavo-convex configuration of the lens surfaces such as the object-side surfaces L1A1, L3A1, L5A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2, L4A2 facing the image side A2 of the third embodiment and the configuration of the positive and negative refractive powers of each lens are substantially similar to those of the first embodiment, except that the third embodiment is different from the first embodiment in the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the object-side surfaces L2A1, L4A1 and the image-side surface L3A2 and the position of the adjustable air gap. Specifically, the difference in the concavo-convex configuration of the surface is that the circumferential area L2A1P of the object-side surface L2A1 of the second lens L2 is a convex surface, the optical axis area L3A2C of the image-side surface L3A2 of the third lens L3 is a convex surface, the optical axis area L4A1C of the object-side surface L4A1 of the fourth lens L4 is a concave surface, and the optical axis area L5A2C of the image-side surface L5A2 of the fifth lens L5 is a concave surface. In the optical imaging lens 3, the air gap between two adjacent third lenses L3 and fourth lenses L4 is an adjustable air gap, that is, adjustable G34. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1, the second lens L2, and the third lens L3. The second lens group includes the fourth lens L4, the fifth lens L5 and the filter TF to the imaging surface IMG. When the optical imaging lens 3 is focused, the adjustable air gap is adjusted by controlling the relative movement of the first lens group or the second lens group along the optical axis by an actuator such as a voice coil motor. For the optical characteristics of each lens and the values ​​of each distance of the optical imaging lens 3 of this embodiment, please refer to Fig.18 The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0150] from Fig.17In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.01 to 0.03 mm, as can be seen from the deflection amplitude of each curve. Fig.17 In the field curvature aberration in the sagittal direction of (b), the three representative wavelength changes fall within the range of -0.025 to 0.015 mm. Fig.17 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.025 to 0.02 mm. Fig.17 (d) shows that the distortion aberration of the optical imaging lens 3 is maintained in the range of -2.5 to 0%. Compared with the first embodiment, the field curvature aberration in the sagittal direction of this embodiment is smaller. From the above data, it can be seen that the various optical characteristics of the optical imaging lens 3 have met the imaging quality requirements of the optical system.

[0151] In addition, from Fig.18 It can be seen that the optical imaging lens 3 of this embodiment provides a better f35 equivalent focal length of 149.989mm than the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens compared to existing optical lenses. Fig. 20 It can be seen from the data related to the temperature and the adjustable air gap that even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is better controlled within 0.163 mm than the first embodiment. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 3 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0152] Please also refer to Figure 21 to Figure 25 ,in Fig.21 A schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a fourth embodiment of the present invention is shown. Fig. 22 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fourth embodiment of the present invention. Fig.23 Displays detailed optical data of the optical imaging lens according to the fourth embodiment of the present invention, Fig.24 The aspherical surface data of each lens of the optical imaging lens according to the fourth embodiment of the present invention are displayed. Fig.25 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the fourth embodiment of the present invention are shown. Fig.21 As shown in , the optical imaging lens 4 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the object side A1 to the image side A2.

[0153] The concavo-convex configuration of the lens surfaces such as the object-side surfaces L1A1, L3A1, L5A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L4A2 facing the image side A2 of the fourth embodiment, and the positive and negative refractive power configuration of each lens are substantially similar to those of the first embodiment, except that the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the object-side surfaces L2A1, L4A1 and the image-side surfaces L3A2, L5A2, and the position of the adjustable air gap of the fourth embodiment are different from those of the first embodiment. Specifically, the difference in the surface concave-convex configuration is that the circumferential region L2A1P of the object side surface L2A1 of the second lens L2 is convex, the optical axis region L3A2C of the image side surface L3A2 of the third lens L3 is convex and the circumferential region L3A2P is convex, the optical axis region L4A1C of the object side surface L4A1 of the fourth lens L4 is concave, and the optical axis region L5A2C of the image side surface L5A2 of the fifth lens L5 is concave. In the optical imaging lens 4, the air gap between two adjacent third lenses L3 and fourth lenses L4 is an adjustable air gap, that is, adjustable G34. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1, the second lens L2, and the third lens L3. The second lens group includes the fourth lens L4, the fifth lens L5 and the filter TF to the imaging surface IMG. When the optical imaging lens 4 is focused, the actuator such as the voice coil motor controls the first lens group or the second lens group to move relatively along the optical axis to adjust the adjustable air gap. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 4 of this embodiment, please refer to Fig.23 The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0154] from Fig. 22 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.02 to 0.035 mm, as can be seen from the deflection amplitude of each curve. Fig. 22 In the field curvature aberration in the sagittal direction of (b), the three representative wavelength changes fall within the range of -0.025 to 0.02 mm. Fig. 22 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.035 to 0.02 mm. Fig. 22 (d) shows that the distortion aberration of the optical imaging lens 4 is maintained within the range of 0 to 0.45%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller. From the above data, it can be seen that the various optical properties of the optical imaging lens 4 have met the imaging quality requirements of the optical system.

[0155] In addition, from Fig.23 It can be seen that the optical imaging lens 4 of this embodiment provides a better f35 equivalent focal length of 160.492mm than the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens than the existing optical lens. Fig.25 It can be seen from the data related to the temperature and the adjustable air gap that even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is better controlled within 0.225 mm than the first embodiment. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 4 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0156] Please also refer to Figures 26 to 30 ,in Fig.26 A schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a fifth embodiment of the present invention is shown. Fig. 27 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the fifth embodiment of the present invention. Fig.28 Displays detailed optical data of the optical imaging lens according to the fifth embodiment of the present invention. Fig.29 The aspherical surface data of each lens of the optical imaging lens according to the fifth embodiment of the present invention are shown. Fig.30 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the fifth embodiment of the present invention are shown. Fig.26 As shown in , the optical imaging lens 5 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the object side A1 to the image side A2.

[0157] The concavo-convex configuration of the lens surfaces of the object-side surfaces L1A1, L3A1, L5A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L4A2 facing the image side A2 of the fifth embodiment and the positive and negative refractive power configuration of each lens are substantially similar to those of the first embodiment, except that the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the object-side surfaces L2A1, L4A1 and the image-side surfaces L3A2, L5A2 and the position of the adjustable air gap of the fifth embodiment are different from those of the first embodiment. Specifically, the difference in the surface concave-convex configuration is that the circumferential region L2A1P of the object-side surface L2A1 of the second lens L2 is convex, the optical axis region L3A2C of the image-side surface L3A2 of the third lens L3 is convex and the circumferential region L3A2P is convex, the optical axis region L4A1C of the object-side surface L4A1 of the fourth lens L4 is concave and the circumferential region L4A1P is convex, and the optical axis region L5A2C of the image-side surface L5A2 of the fifth lens L5 is concave. In the optical imaging lens 5, the air gap between the two adjacent first lens L1 and second lens L2 is an adjustable air gap, that is, G12 is adjustable. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1, and the second lens group includes the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the filter TF to the imaging surface IMG. When the optical imaging lens 5 is focused, the first lens group or the second lens group is controlled by an actuator such as a voice coil motor to move relatively along the optical axis to adjust the adjustable air gap. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 5 of this embodiment, please refer to Fig.28 The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0158] from Fig. 27 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.06 to 0.1 mm, as can be seen from the deflection amplitude of each curve. Fig. 27 In the sagittal field curvature aberration of (b), the three representative wavelength changes fall within the range of -0.025 to 0.045 mm. Fig. 27 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.035 to 0.045 mm. Fig. 27 (d) shows that the distortion aberration of the optical imaging lens 5 is maintained within the range of 0 to 0.45%. Compared with the first embodiment, the distortion aberration of this embodiment is smaller. From the above data, it can be seen that the various optical properties of the optical imaging lens 5 have met the imaging quality requirements of the optical system.

[0159] In addition, from Fig.28 It can be seen that the optical imaging lens 5 of this embodiment provides a better f35 equivalent focal length of 300.201mm than that of the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens than the existing optical lens. Fig.30 It can be seen from the data related to the temperature and the adjustable air gap that even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is better controlled within 0.256 mm than the first embodiment. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 5 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0160] Please also refer to Figure 31 to Figure 35 ,in Fig.31 A schematic diagram showing the cross-sectional structure of a five-lens optical imaging lens according to a sixth embodiment of the present invention is shown. Fig.32 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the sixth embodiment of the present invention. Fig.33 Displays detailed optical data of the optical imaging lens according to the sixth embodiment of the present invention, Fig.34 The aspheric surface data of each lens of the optical imaging lens according to the sixth embodiment of the present invention are shown. Fig.35 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the fifth embodiment of the present invention are shown. Fig.31 As shown in , the optical imaging lens 6 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the object side A1 to the image side A2.

[0161] The concavo-convex configuration of the lens surfaces such as the object-side surface L1A1 facing the object side A1 and the image-side surfaces L1A2 and L4A2 facing the image side A2 and the positive and negative refractive power configuration of the third lens L3 and the fourth lens L4 of the sixth embodiment are substantially similar to those of the first embodiment, except that the sixth embodiment is different from the first embodiment in the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the object-side surfaces L2A1, L3A1, L4A1, L5A1 and the image-side surfaces L2A2, L3A2, L5A2, the position of the adjustable air gap, the first lens L1 having a negative refractive power, the second lens L2 having a positive refractive power, and the fifth lens L5 having a negative refractive power. Specifically, the difference in the surface concave-convex configuration is that the circumferential region L2A1P of the object-side surface L2A1 of the second lens L2 is convex, the optical axis region L2A2C of the image-side surface L2A2 of the second lens L2 is convex and the circumferential region L2A2P is convex, the optical axis region L3A1C of the object-side surface L3A1 of the third lens L3 is concave and the circumferential region L3A1P is concave, the optical axis region L3A2C of the image-side surface L3A2 of the third lens L3 is convex and the circumferential region L3A2P is convex, the circumferential region L5A1P of the object-side surface L5A1 of the fifth lens L5 is convex, the optical axis region L5A2C of the image-side surface L5A2 of the fifth lens L5 is concave and the circumferential region L5A2P is concave. In the optical imaging lens 6, the air gap between two adjacent second lenses L2 and third lenses L3 is an adjustable air gap, that is, G23 is adjustable. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1 and the second lens L2, and the second lens group includes the third lens L3, the fourth lens L4, the fifth lens L5 and the filter TF to the imaging surface IMG. When the optical imaging lens 6 is focused, the first lens group or the second lens group is controlled by an actuator such as a voice coil motor to move relatively along the optical axis to adjust the adjustable air gap. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 6 of this embodiment, please refer to Fig.33 The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0162] from Fig.32 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.01 to 0.03 mm, as can be seen from the deflection amplitude of each curve. Fig.32 In the sagittal field curvature aberration of (b), the three representative wavelength changes fall within the range of -0.02 to 0.025 mm. Fig.32 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.025 to 0.04 mm. Fig.32 (d) shows that the distortion aberration of the optical imaging lens 6 is maintained in the range of -2.5 to 0%. From the above data, it can be seen that the various optical properties of the optical imaging lens 6 have met the imaging quality requirements of the optical system.

[0163] In addition, from Fig.33 It can be seen that the optical imaging lens 6 of this embodiment provides a better f35 equivalent focal length of 150.053mm than that of the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens than the existing optical lens. Fig.35 The data related to the temperature and the adjustable air gap shown in FIG. 2 show that even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is controlled within 0.786 mm. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 6 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0164] Please also refer to Figures 36 to 40 ,in Fig.36 A schematic cross-sectional structure diagram of a five-lens optical imaging lens according to a seventh embodiment of the present invention is shown. Fig.37 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the seventh embodiment of the present invention. Fig.38 Displays detailed optical data of the optical imaging lens according to the seventh embodiment of the present invention. Fig.39 The aspherical surface data of each lens of the optical imaging lens according to the seventh embodiment of the present invention are shown. Fig.40 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the fifth embodiment of the present invention are shown. Fig.36 As shown in , the optical imaging lens 7 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and a fifth lens L5 in sequence from the object side A1 to the image side A2.

[0165] The concavo-convex configuration of the lens surfaces such as the object-side surface L1A1 facing the object side A1 and the image-side surfaces L1A2 and L4A2 facing the image side A2 and the positive and negative refractive power configuration of the third lens L3 and the fourth lens L4 of the seventh embodiment are substantially similar to those of the first embodiment, except that the seventh embodiment is different from the first embodiment in the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the object-side surfaces L2A1, L3A1, L4A1, L5A1 and the image-side surfaces L2A2, L3A2, L5A2, the position of the adjustable air gap, the first lens L1 having a negative refractive power, the second lens L2 having a positive refractive power, and the fifth lens L5 having a negative refractive power. Specifically, the difference in the surface concave-convex configuration is that the circumferential region L2A1P of the object-side surface L2A1 of the second lens L2 is convex, the optical axis region L2A2C of the image-side surface L2A2 of the second lens L2 is convex and the circumferential region L2A2P is convex, the optical axis region L3A1C of the object-side surface L3A1 of the third lens L3 is concave and the circumferential region L3A1P is concave, the optical axis region L3A2C of the image-side surface L3A2 of the third lens L3 is convex and the circumferential region L3A2P is convex, the circumferential region L5A1P of the object-side surface L5A1 of the fifth lens L5 is convex, the optical axis region L5A2C of the image-side surface L5A2 of the fifth lens L5 is concave and the circumferential region L5A2P is concave. In the optical imaging lens 7, the air gap between two adjacent third lenses L3 and fourth lenses L4 is an adjustable air gap, that is, G34 is adjustable. Here, the lenses L1, L2, L3, L4, L5 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1, the second lens L2, and the third lens L3. The second lens group includes the fourth lens L4, the fifth lens L5 and the filter TF to the imaging surface IMG. When the optical imaging lens 7 is focused, the first lens group or the second lens group is controlled by an actuator such as a voice coil motor to move relatively along the optical axis to adjust the adjustable air gap. For the optical characteristics and distance values ​​of each lens of the optical imaging lens 7 of this embodiment, please refer to Fig.38 The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0166] from Fig.37 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.01 to 0.03 mm, as can be seen from the deflection amplitude of each curve. Fig.37 In the sagittal field curvature aberration of (b), the three representative wavelength changes fall within the range of -0.02 to 0.025 mm. Fig.37 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.025 to 0.035 mm. Fig.37 (d) shows that the distortion aberration of the optical imaging lens 7 is maintained within the range of -2.5 to 0%. From the above data, it can be seen that the various optical characteristics of the optical imaging lens 7 have met the imaging quality requirements of the optical system. Fig.38 It can be seen that the optical imaging lens 7 of this embodiment provides a better f35 equivalent focal length of 150.126mm than that of the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens than the existing optical lens. Fig.40 It can be seen from the data related to the temperature and the adjustable air gap that even if the temperature varies between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is better controlled within 0.118 mm than the first embodiment. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 7 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters. The optical imaging lens 7 of this embodiment is similar to the optical imaging lens of the sixth embodiment, and the only difference is that G34 and BFL of this embodiment are slightly different and the adjustable air gap is set at G34. Therefore, fG of this embodiment is smaller, so the absolute value of the distance difference before and after the adjustable air gap is adjusted can be greatly reduced to 0.118 mm.

[0167] Please also refer to Figure 41 to Figure 45 ,in Fig.41 A schematic cross-sectional structure diagram of a six-lens optical imaging lens according to an eighth embodiment of the present invention is shown. Fig.42 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the eighth embodiment of the present invention. Fig.43 Displays detailed optical data of the optical imaging lens according to the eighth embodiment of the present invention, Fig.44 The aspherical surface data of each lens of the optical imaging lens according to the eighth embodiment of the present invention are displayed. Fig.45 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the fifth embodiment of the present invention are shown. Fig.41As shown in , the optical imaging lens 8 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a sixth lens L6 in sequence from the object side A1 to the image side A2.

[0168] The concavo-convex configuration of the lens surfaces such as the object-side surfaces L1A1, L4A1 facing the object side A1 and the image-side surfaces L1A2, L2A2, L3A2, L5A2 facing the image side A2 and the positive and negative refractive power configuration of the first lens L1, the second lens L2 and the fifth lens L5 of the eighth embodiment are substantially similar to those of the first embodiment, except that the eighth embodiment is different from the first embodiment in the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the object-side surfaces L2A1, L3A1, L5A1 and the image-side surface L4A2, the position of the adjustable air gap, the third lens L3 having a negative refractive power, the fourth lens L4 having a positive refractive power, and the addition of a sixth lens L6. Specifically, the difference in the surface concavo-convex configuration is that the optical axis region L2A1C of the object side surface L2A1 of the second lens L2 is concave, the circumferential region L3A1P of the object side surface L3A1 of the third lens L3 is concave, the optical axis region L4A2C of the image side surface L4A2 of the fourth lens L4 is convex and the circumferential region L4A2P is convex, and the optical axis region L5A1C of the object side surface L5A1 of the fifth lens L5 is concave. The sixth lens L6 newly added in this embodiment has a negative refractive power, the optical axis region L6A1C of the object side surface L6A1 is concave and the circumferential region L6A1P is convex, the optical axis region L6A2C of the image side surface L6A2 is concave and the circumferential region L6A2P is convex, and the object side surface L6A1 and the image side surface L6A2 of the sixth lens L6 are both aspherical surfaces defined according to the aspherical curve formula of the first embodiment. In the optical imaging lens 8, the air gap between the two adjacent first lenses L1 and second lenses L2 is an adjustable air gap, that is, adjustable G12. Here, the lenses L1, L2, L3, L4, L5, L6 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1, and the second lens group includes the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the filter TF to the imaging surface IMG. When the optical imaging lens 8 is focused, the adjustable air gap is adjusted by controlling the relative movement of either the first lens group or the second lens group along the optical axis by an actuator such as a voice coil motor. For the optical characteristics of each lens and the values ​​of each distance of the optical imaging lens 8 of this embodiment, please refer to Fig.43The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0169] from Fig.42 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.02 to 0.04 mm, as can be seen from the deflection amplitude of each curve. Fig.42 In the sagittal field curvature aberration of (b), the three representative wavelength changes fall within the range of -0.02 to 0.02 mm. Fig.42 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.015 to 0.05 mm. Fig.42 (d) shows that the distortion aberration of the optical imaging lens 8 is maintained within the range of -6.5 to 0%. Compared with the first embodiment, the field curvature aberration in the sagittal direction of this embodiment is smaller. From the above data, it can be seen that the various optical characteristics of the optical imaging lens 8 have met the imaging quality requirements of the optical system.

[0170] In addition, from Fig.43 It can be seen that the optical imaging lens 8 of this embodiment provides a better f35 equivalent focal length of 236.121mm than that of the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens than the existing optical lens. Fig.45 The data related to the temperature and the adjustable air gap shown in the figure show that even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is controlled within 0.437 mm. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 8 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0171] Please also refer to Figures 46 to 50 ,in Fig.46 A schematic cross-sectional structure diagram of a seven-lens optical imaging lens according to a ninth embodiment of the present invention is shown. Fig.47 The diagram schematically shows the longitudinal spherical aberration and various aberrations of the optical imaging lens according to the ninth embodiment of the present invention. Fig.48 Displays detailed optical data of the optical imaging lens according to the ninth embodiment of the present invention. Fig.49 The aspherical surface data of each lens of the optical imaging lens according to the ninth embodiment of the present invention are displayed. Fig.50 The data related to the temperature and the adjustable air gap of the optical imaging lens according to the fifth embodiment of the present invention are shown. Fig.46 As shown in , the optical imaging lens 9 of this embodiment includes an aperture STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6 and a seventh lens L7 in sequence from the object side A1 to the image side A2.

[0172] The concavo-convex configuration of the lens surfaces such as the object-side surfaces L1A1, L5A1 facing the object side A1 and the image-side surfaces L1A2, L5A2 facing the image side A2 and the positive and negative refractive power configuration of the first lens L1 and the second lens L2 of the ninth embodiment are substantially similar to those of the first embodiment, except that the ninth embodiment is different from the first embodiment in the curvature radius, lens thickness, aspheric coefficient, back focal length and other related optical parameters, the concavo-convex configuration of the surface of the object-side surfaces L2A1, L3A1, L4A1 and the image-side surfaces L3A2, L4A2, L5A2, the position of the adjustable air gap, the third lens L3 having a negative refractive power, the fourth lens L4 having a positive refractive power, the fifth lens L5 having a negative refractive power, and the addition of the sixth lens L6 and the seventh lens L7. In detail, the difference in the concave-convex configuration of the surface is that the circumferential area L2A1P of the object-side surface L2A1 of the second lens L2 is convex, the circumferential area L3A1P of the object-side surface L3A1 of the third lens L3 is concave, the circumferential area L3A2P of the image-side surface L3A2 of the third lens L3 is convex, the circumferential area L4A1P of the object-side surface L4A1 of the fourth lens L4 is convex, the circumferential area L4A2P of the image-side surface L4A2 of the fourth lens L4 is convex, and the optical axis area L5A2C of the image-side surface L5A2 of the fifth lens L5 is concave and the circumferential area L5A2P is concave. The sixth lens L6 newly added in this embodiment has a positive refractive power, the optical axis region L6A1C of the object side surface L6A1 is a convex surface and the circumferential region L6A1P thereof is a convex surface, the optical axis region L6A2C of the image side surface L6A2 is a convex surface and the circumferential region L6A2P thereof is a convex surface, and both the object side surface L6A1 and the image side surface L6A2 of the sixth lens L6 are aspherical surfaces defined according to the aspherical curve formula of the first embodiment. The seventh lens L7 newly added in this embodiment has a negative refractive power, the optical axis region L7A1C of the object side surface L7A1 is a concave surface and the circumferential region L7A1P thereof is a concave surface, the optical axis region L7A2C of the image side surface L7A2 is a concave surface and the circumferential region L7A2P thereof is a convex surface, and both the object side surface L7A1 and the image side surface L7A2 of the seventh lens L7 are aspherical surfaces defined according to the aspherical curve formula of the first embodiment. In the optical imaging lens 9, the air gap between the two adjacent sixth lens L6 and seventh lens L7 is an adjustable air gap, that is, adjustable G67. Here, the lenses L1, L2, L3, L4, L5, L6, L7 and the filter TF are divided into two lens groups. The first lens group includes the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5 and the sixth lens L6. The second lens group includes the seventh lens L7 and the filter TF to the imaging surface IMG. When the optical imaging lens 9 is focused, the adjustable air gap is adjusted by controlling the relative movement of either the first lens group or the second lens group along the optical axis by an actuator such as a voice coil motor. For the optical characteristics of each lens and the values ​​of each distance of the optical imaging lens 9 of this embodiment, please refer to Fig.48The values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) are calculated based on the optical parameters of the optical imaging lens at 20°C and focused at infinity. Please refer to Fig.51 .

[0173] from Fig.47 In the longitudinal spherical aberration of (a), the deviation of the imaging point of off-axis light at different heights is controlled within -0.02 to 0.03 mm, as can be seen from the deflection amplitude of each curve. Fig.47 In the field curvature aberration in the sagittal direction of (b), the three representative wavelength changes fall within the range of -0.01 to 0.04 mm. Fig.47 In the field curvature aberration in the tangential direction of (c), the three representative wavelength changes fall within the range of -0.06 to 0.08 mm. Fig.47 (d) shows that the distortion aberration of the optical imaging lens 9 is maintained within the range of -5 to 0%. From the above data, it can be seen that the various optical properties of the optical imaging lens 9 have met the imaging quality requirements of the optical system.

[0174] In addition, from Fig.48 It can be seen that the optical imaging lens 9 of this embodiment provides a better f35 equivalent focal length of 261.369mm than the first embodiment, and can effectively provide a larger optical zoom ratio when used with a wide-angle lens than the existing optical lens. Fig.50 The data related to the temperature and the adjustable air gap shown in FIG. 2 show that even if the temperature is between -20 and 60°C and the distance varies between infinity and 1.200 meters, the absolute value of the distance difference before and after the adjustable air gap is adjusted is controlled within 0.486 mm. This is conducive to overcoming the distance limitation of the current actuator design, and adjusting the distance of the adjustable air gap instead of adjusting the focusing distance of the distance between the lens and the imaging surface, so that when the optical imaging lens 9 is used as a telephoto lens, it can be focused by the actuator within the distance range from infinity to 1.200 meters.

[0175] Fig.51From the values ​​of EFL / ImgH, TTL / ImgH, HFOV / ImgH, EFL / fG, EFL / (Fno*ImgH), EFL / BFL, TTL / TL, TTL / T1, TTL / (T2+G23+T3), ALT / AAG, (T1+G12+T3+G34) / (T4+G45+T5), (G23+T3+G34) / (T1+T2), (T4+G45+T5) / (T1+T2), and (T1+G12+T2+T4+G45+T5) / (G23+T3+G34) of the above nine embodiments, as well as the detailed optical data and tables of each embodiment, it can be seen that the optical imaging lens of the present invention can indeed satisfy at least any one of the above-mentioned conditional expressions (1) to (3) and / or any one of the conditional expressions (4) to (16). Secondly, the numerical ranges obtained by the combination ratio relationship of the optical parameters disclosed in each embodiment herein, including the maximum and minimum values, can all fall within the scope of the implementation of the present invention.

[0176] Here, an example but not limited to the technical means of adjusting the adjustable air gap is to drive one of the two adjacent lenses to move through a hardware structure to adjust the width of the adjustable air gap between the two adjacent lenses. Please refer to FIG. Figure 52 to Figure 55 ,in Fig.52 A side view of the optical imaging lens according to the tenth embodiment of the present invention is shown. Fig.53 A front view showing an appearance of an optical imaging lens according to a tenth embodiment of the present invention is shown. Fig.54 The optical imaging lens according to the tenth embodiment of the present invention is shown. Fig.53 A cross-sectional diagram in the AA' direction, Fig.55 The optical imaging lens according to the tenth embodiment of the present invention is shown. Fig.53 BB' direction. In the present embodiment, the optical imaging lens 10 comprises a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5 and a lens barrel BA. The lens barrel BA contains at least one of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5. For example, the lens barrel BA comprises two supporting parts BA1 and BA2, each of which contains at least one lens, such as the supporting part BA1 contains the first lens L1, the second lens L2 and the third lens L3, and the supporting part BA2 contains the fourth lens L4 and the fifth lens L5. An actuator such as a voice coil motor (not shown) can drive any one of the two supporting parts BA1 and BA2, so that the two supporting parts BA1 and BA2 move relative to each other along the optical axis to adjust the adjustable air gap between two adjacent lenses, such as the adjustable air gap between the third lens L3 and the fourth lens L4.

[0177] In order to further reduce the overall volume of the optical imaging lens 10, this embodiment proposes two measures, one of which is to form a tangent plane parallel to the optical axis on one outer surface of the lens barrel BA, and the other is to make at least one of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 have a tangent plane formed between the object side surface and the image side surface. The first measure is to reduce the overall volume of the optical imaging lens 10 by reducing the volume of the lens barrel BA, and the second measure is to reduce the overall volume of the optical imaging lens 10 by further reducing the volume of the lens. In the present embodiment, for example, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 all have a cut surface L1A3 / L2A3 / L3A3 / L4A3 / L5A3 formed between the object side surface L1A1 / L2A1 / L3A1 / L4A1 / L5A1 and the image side surface L1A2 / L2A2 / L3A2 / L4A2 / L5A2, but the present invention is not limited thereto and may include lenses with cut surfaces and lenses without cut surfaces at the same time, so that the optical boundary of the lens with cut surfaces is different from the optical boundary of the lens without cut surfaces. To be more specific, although the lens with cut surfaces reduces the optical effective diameter outside the cut surfaces, it is still sufficient to form an image that can be fully displayed on an image display commonly used in portable electronic products. For example Fig.54 Display, according to Fig.53 In the AA' direction, the optical boundaries between the object-side surfaces L1A1 / L2A1 / L3A1 / L4A1 / L5A1 and the image-side surfaces L1A2 / L2A2 / L3A2 / L4A2 / L5A2 of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 still maintain an arc shape. Fig.55 Display, according to Fig.53 In the BB' direction, the optical boundary between the object-side surface L1A1 / L2A1 / L3A1 / L4A1 / L5A1 and the image-side surface L1A2 / L2A2 / L3A2 / L4A2 / L5A2 of the first lens L1, the second lens L2, the third lens L3, the fourth lens L4 and the fifth lens L5 is a plane defined by the tangent plane L1A3 / L2A3 / L3A3 / L4A3 / L5A3.

[0178] See also Fig.56 , which shows an appearance diagram of an optical imaging lens according to the eleventh embodiment of the present invention. The aforementioned measures for reducing the overall volume of the optical imaging lens 10 can also be implemented separately, such as: the optical imaging lens 11 of this embodiment only forms a section BAA1 parallel to the optical axis on an outer surface of the lens barrel BA.

[0179] The optical imaging lenses 1-9 of the first to ninth embodiments described above may be configured with a lens barrel BA, other lens barrels or other hardware structures such as the tenth and eleventh embodiments to drive any one of two adjacent lenses to move to adjust the adjustable air gap width between the two adjacent lenses, and there is no need to limit this.

[0180] The longitudinal spherical aberration, field curvature aberration, and distortion aberration of each embodiment of the optical imaging lens of the present invention all meet the use specifications. In addition, the off-axis light rays of the three representative wavelengths at different heights are all concentrated near the imaging point. From the deflection amplitude of each curve, it can be seen that the imaging point deviations of the off-axis light rays at different heights are all controlled and have good spherical aberration, aberration, and distortion suppression capabilities. Further referring to the imaging quality data, the distances between the three representative wavelengths are also quite close to each other, indicating that the present invention has good concentration of light rays of different wavelengths under various conditions and has excellent dispersion suppression capabilities. In summary, the present invention can produce excellent imaging quality through the design and mutual matching of lenses.

[0181] The above description is based on a plurality of different embodiments of the present invention, wherein each feature can be implemented singly or in different combinations. Therefore, the disclosure of the embodiments of the present invention is a specific embodiment to illustrate the principles of the present invention, and the present invention should not be limited to the disclosed embodiments. Further, the previous description and its accompanying drawings are only for the purpose of demonstrating the present invention and are not limited thereto. Changes or combinations of other components are possible and do not violate the spirit and scope of the present invention. In addition, the numerical ranges including the maximum and minimum values ​​obtained by the combination ratio relationship of the optical parameters disclosed in each embodiment of the present invention can be implemented accordingly.

Claims

1. An optical imaging lens, comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence along an optical axis from an object side to an image side, wherein each of the first lens to the fifth lens comprises an object-side surface facing the object side and allowing imaging light to pass therethrough, and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein The first lens is the first lens having a refractive power from the object side to the image side, an optical axis region of the object side of the first lens is a convex surface, and an optical axis region of the image side of the first lens is a concave surface; The second lens is a second lens having a refractive power from the object side toward the image side, and an optical axis region of the object side surface of the second lens is a convex surface; The third lens is the third lens having a refractive power from the object side toward the image side, and the third lens has a positive refractive power; The fourth lens is the fourth lens having a refractive power from the object side to the image side, the fourth lens has a negative refractive power, and an optical axis region of the image side surface of the fourth lens is a concave surface; The fifth lens is the fifth lens having a refractive power from the object side to the image side, and an optical axis region of the object side surface of the fifth lens is a convex surface; The optical imaging lens has an adjustable air gap between two adjacent lenses; The optical imaging lens has only five lenses; and The optical imaging lens meets 6.900≦EFL / ImgH≦14.000, 1.500≦EFL / fG; EFL represents a system focal length of the optical imaging lens, ImgH represents an image height of the optical imaging lens, and fG is a lens group focal length from the object side to a first adjustable air gap, wherein the first adjustable air gap is the first adjustable air gap from the object side to the image side in order.

2. The optical imaging lens as claimed in claim 1, wherein the optical imaging lens further satisfies HFOV≦9.000°, where HFOV represents half of the viewing angle of the optical imaging lens.

3. An optical imaging lens, comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence along an optical axis from an object side to an image side, and each of the first lens to the fifth lens comprises an object-side surface facing the object side and allowing imaging light to pass therethrough, and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein The first lens is the first lens having a refractive power from the object side to the image side, an optical axis region of the object side of the first lens is a convex surface, and an optical axis region of the image side of the first lens is a concave surface; The second lens is a second lens having a refractive power from the object side toward the image side, and an optical axis region of the object side surface of the second lens is a convex surface; The third lens is the third lens having a refractive power from the object side toward the image side, and the third lens has a positive refractive power; The fourth lens is the fourth lens having a refractive power from the object side to the image side, the fourth lens has a negative refractive power, and an optical axis region of the image side surface of the fourth lens is a concave surface; The fifth lens is the fifth lens having a refractive power from the object side to the image side, and an optical axis region of the object side surface of the fifth lens is a convex surface; The optical imaging lens has an adjustable air gap between two adjacent lenses; The optical imaging lens has only five lenses; and The optical imaging lens meets 6.400≦TTL / ImgH≦16.000, 1.500≦EFL / fG; TTL represents a distance from the object side of the first lens to an imaging surface on the optical axis, ImgH represents an image height of the optical imaging lens, EFL represents a system focal length of the optical imaging lens, fG is a focal length of the lens group from the object side to a first adjustable air gap, wherein the first adjustable air gap is the first adjustable air gap from the object side to the image side in order.

4. An optical imaging lens, comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence along an optical axis from an object side to an image side, and each of the first lens to the fifth lens comprises an object-side surface facing the object side and allowing imaging light to pass therethrough, and an image-side surface facing the image side and allowing imaging light to pass therethrough, wherein The first lens is the first lens having a refractive power from the object side to the image side, an optical axis region of the object side of the first lens is a convex surface, and an optical axis region of the image side of the first lens is a concave surface; The second lens is a second lens having a refractive power from the object side toward the image side, and an optical axis region of the object side surface of the second lens is a convex surface; The third lens is the third lens having a refractive power from the object side toward the image side, and the third lens has a positive refractive power; The fourth lens is the fourth lens having a refractive power from the object side to the image side, the fourth lens has a negative refractive power, and an optical axis region of the image side surface of the fourth lens is a concave surface; The fifth lens is the fifth lens having a refractive power from the object side to the image side, and an optical axis region of the object side surface of the fifth lens is a convex surface; The optical imaging lens has an adjustable air gap between two adjacent lenses; The optical imaging lens has only five lenses; and The optical imaging lens meets HFOV / ImgH≦3.800° / mm, 1.500≦EFL / fG; HFOV represents a half viewing angle of the optical imaging lens, ImgH represents an image height of the optical imaging lens, EFL represents a system focal length of the optical imaging lens, and fG is a focal length of a lens group from the object side to a first adjustable air gap, wherein the first adjustable air gap is the first adjustable air gap from the object side to the image side in order.

5. The optical imaging lens according to claim 1, 3 or 4, wherein the optical imaging lens further satisfies 0.800≦EFL / EFLA≦1.200, wherein EFLA represents the system focal length of the optical imaging lens after adjusting the adjustable air gap. 6 . The optical imaging lens as claimed in claim 3 , wherein the optical imaging lens further satisfies EFL / BFL≦2.800, where BFL represents a distance from the image-side surface of the fifth lens element to an imaging plane on the optical axis.

7. The optical imaging lens as claimed in claim 3 or 4, wherein the optical imaging lens further satisfies 2.000≦ EFL / (Fno*ImgH), where Fno represents an aperture value of the optical imaging lens.

8. The optical imaging lens according to claim 1 or 4, wherein the optical imaging lens further satisfies 4.000≦ TTL / (T2+G23+T3), TTL represents a distance from the object side surface of the first lens to an imaging surface on the optical axis, T2 represents a thickness of the second lens on the optical axis, G23 represents a distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis, and T3 represents a thickness of the third lens on the optical axis.

9. The optical imaging lens as claimed in claim 1 or 4, wherein the optical imaging lens further satisfies 1.500≦TTL / TL, TTL represents a distance from the object side surface of the first lens to an imaging surface on the optical axis, and TL represents a distance from the object side surface of the first lens to the image side surface of the fifth lens on the optical axis.

10. The optical imaging lens as claimed in claim 1 or 4, wherein the optical imaging lens further satisfies 6.000≦TTL / T1, TTL represents a distance from the object side surface of the first lens to an imaging surface on the optical axis, and T1 represents a thickness of the first lens on the optical axis.

11. The optical imaging lens as claimed in claim 1, 3 or 4, wherein the optical imaging lens further comprises a lens barrel in which at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens is disposed, and a cut surface parallel to the optical axis is formed on an outer surface of the lens barrel.

12. The optical imaging lens as claimed in claim 1 , 3 or 4 , wherein the optical imaging lens further satisfies 1.200≦(G23+T3+G34) / (T1+T2), G23 represents a distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis, T3 represents a thickness of the third lens on the optical axis, G34 represents a distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis, T1 represents a thickness of the first lens on the optical axis, and T2 represents a thickness of the second lens on the optical axis.

13. The optical imaging lens of claim 1 , 3 or 4 , wherein an absolute value of a maximum distance difference between the adjustable air gap before and after adjustment is less than or equal to 1.000 mm, wherein the maximum distance difference between the adjustable air gap before and after adjustment is the distance of the adjustable air gap at which the optical imaging lens is focused at 60° C. and a distance of 1.200 meters minus the distance of the adjustable air gap at which the optical imaging lens is focused at 20° C. and a distance of infinity.

14. The optical imaging lens as claimed in claim 1 , 3 or 4 , wherein at least one of the first lens, the second lens, the third lens, the fourth lens and the fifth lens has a cut surface formed between the object-side surface and the image-side surface, wherein an optical boundary of the lens having the cut surface is different from an optical boundary of the lens without the cut surface.

15. The optical imaging lens as claimed in claim 1, 3 or 4, wherein the optical imaging lens further satisfies 1.300≦ALT / AAG, ALT represents a sum of thicknesses of five lenses from the first lens to the fifth lens on the optical axis, and AAG represents a sum of four air gaps from the first lens to the fifth lens on the optical axis.

16. The optical imaging lens as claimed in claim 1 , 3 or 4 , wherein the optical imaging lens further satisfies 0.700≦(T4+G45+T5) / (T1+T2), T4 represents a thickness of the fourth lens on the optical axis, G45 represents a distance from the image-side surface of the fourth lens to the object-side surface of the fifth lens on the optical axis, T5 represents a thickness of the fifth lens on the optical axis, T1 represents a thickness of the first lens on the optical axis, and T2 represents a thickness of the second lens on the optical axis.

17. The optical imaging lens of claim 1 , 3 or 4 , wherein the optical imaging lens further satisfies 1.000≦(T1+G12+T3+G34) / (T4+G45+T5), T1 represents a thickness of the first lens on the optical axis, G12 represents a distance from the image side surface of the first lens to the object side surface of the second lens on the optical axis, T3 represents a thickness of the third lens on the optical axis, G34 represents a distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis, T4 represents a thickness of the fourth lens on the optical axis, G45 represents a distance from the image side surface of the fourth lens to the object side surface of the fifth lens on the optical axis, and T5 represents a thickness of the fifth lens on the optical axis.

18. The optical imaging lens of claim 1 , 3 or 4 , wherein the optical imaging lens further satisfies (T1+G12+T2+T4+G45+T5) / (G23+T3+G34)≦2.500, T1 represents a thickness of the first lens on the optical axis, G12 represents a distance from the image side surface of the first lens to the object side surface of the second lens on the optical axis, T2 represents a thickness of the second lens on the optical axis, T4 represents a thickness of the fourth lens on the optical axis, G45 represents a distance from the image side surface of the fourth lens to the object side surface of the fifth lens on the optical axis, T5 represents a thickness of the fifth lens on the optical axis, G23 represents a distance from the image side surface of the second lens to the object side surface of the third lens on the optical axis, T3 represents a thickness of the third lens on the optical axis, and G34 represents a distance from the image side surface of the third lens to the object side surface of the fourth lens on the optical axis.

Images