Optical imaging system, imaging module and electronic device

Abstract

The present invention proposes an optical imaging system, an imaging module and an electronic device. The optical imaging system includes: a first lens with positive refractive power, the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; a second lens with negative refractive power, the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis; a third lens, a fourth lens, a fifth lens and a sixth lens with refractive power; a seventh lens with negative refractive power, the image side surface of the seventh lens is concave near the optical axis; the optical imaging system satisfies the following relationship: (L71p1-L71p2)-(L62p1-L62p2)<0.9mm. The above optical imaging system can realize the shooting function of large aperture and large image surface, and can ensure that the optical imaging system has low sensitivity and high imaging quality while achieving miniaturization.

Description

Technical Field

[0001] The present invention relates to optical imaging technology, and in particular to an optical imaging system, an imaging module and an electronic device. Background Art

[0002] Nowadays, with the rapid development of science and technology, consumers have higher and higher requirements for the imaging quality of mobile electronic products. At present, the five-chip imaging module is widely used in the market, but its resolution is increasingly unable to meet the needs of consumers. Compared with the five-chip imaging module, the seven-chip imaging module can obtain higher resolution and can be used in mobile electronic products, thereby improving the image quality, resolution and clarity of the shooting. In addition, the performance of photosensitive elements such as charge coupled device (CCD) and complementary metal oxide semiconductor (CMOS) has also been greatly improved, which makes it possible to shoot high-quality images and brings people a higher quality shooting experience.

[0003] In the process of implementing this application, the inventors found that there are at least the following problems in the prior art: due to the small size of mobile electronic products, as the number of lenses increases, the size of the imaging module will also increase, and the existing seven-piece imaging module is difficult to achieve miniaturization while having high imaging quality. Summary of the invention

[0004] In view of the above, it is necessary to propose an optical imaging system, an imaging module and an electronic device to solve the above problems.

[0005] The embodiment of the present application provides an optical imaging system, which includes, from the object side to the image side, the following:

[0006] A first lens having positive refractive power, wherein the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis;

[0007] A second lens having negative refractive power, wherein the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis;

[0008] a third lens having refractive power;

[0009] a fourth lens having a refractive power;

[0010] a fifth lens having refractive power;

[0011] a sixth lens having a refractive power;

[0012] A seventh lens element having negative refractive power, wherein the image side surface of the seventh lens element is concave near the optical axis;

[0013] The optical imaging system satisfies the following relationship:

[0014] (L71p1-L71p2)-(L62p1-L62p2)<0.9mm;

[0015] Among them, L62p1 represents the maximum vertical distance between the intersection of the edge field of view and the image side of the sixth lens and the optical axis, L62p2 represents the minimum vertical distance between the intersection of the edge field of view and the image side of the sixth lens and the optical axis, L71p1 represents the maximum vertical distance between the intersection of the edge field of view and the object side of the seventh lens and the optical axis, L71p2 represents the minimum vertical distance between the intersection of the edge field of view and the object side of the seventh lens and the optical axis, and the edge field of view is the light beam farthest from the optical axis that is incident and converged to the imaging surface of the optical imaging system.

[0016] The optical imaging system can realize the shooting function of large aperture and large image surface through the mixed arrangement of seven lenses with refractive power and the reasonable combination design of the convex surface and concave surface of each lens, and can ensure that the optical imaging system has low sensitivity and has high imaging quality while achieving miniaturization; and, by satisfying the above relationship, it can reasonably control the difference in the clear aperture of the seventh lens and the sixth lens, and can effectively reduce the step difference on the two lens structures, so that the edge field light is smoother, and it is easy to process and produce the stability of the lens.

[0017] In some embodiments, the image side surface of the third lens is convex at the near optical axis, the object side surface of the fourth lens is concave at the near optical axis, the image side surface of the fourth lens is convex at the near optical axis, the object side surface of the fifth lens is convex at the near optical axis, the image side surface of the fifth lens is concave at the near optical axis, the object side surface of the sixth lens is convex at the near optical axis, and the image side surface of the sixth lens is concave at the near optical axis.

[0018] The rational combination of the above lenses is conducive to the large-angle light entering the optical imaging system, which expands the field of view of the optical imaging system and facilitates the miniaturization and lightweight of the optical imaging system.

[0019] In some embodiments, the optical imaging system satisfies the following relationship:

[0020] Fno<2;

[0021] Wherein, Fno is the aperture number of the optical imaging system.

[0022] Satisfying the above relationship can ensure that the optical imaging system has the characteristics of a large aperture, and the optical imaging system has sufficient light input, making the captured image clearer, and can achieve the capture of high-quality night scenes, starry sky and other space scenes with low brightness.

[0023] In some embodiments, the optical imaging system satisfies the following relationship:

[0024] R6≤-1000mm;

[0025] Wherein, R6 is the curvature radius of the image side surface of the third lens.

[0026] By satisfying the above relationship, the sensitivity of the optical imaging system on the image side of the third lens can be effectively reduced, thereby improving the yield of the optical imaging system.

[0027] In some embodiments, the optical imaging system satisfies the following relationship:

[0028] (L52p1-L52p2) / CT5<7;

[0029] Among them, L52p1 represents the maximum vertical distance between the intersection of the edge field of view and the image side surface of the fifth lens and the optical axis, L52p2 represents the minimum vertical distance between the intersection of the edge field of view and the image side surface of the fifth lens and the optical axis, and CT5 is the distance between the object side surface of the fifth lens and the image side surface of the fifth lens on the optical axis.

[0030] Satisfying the above relationship can make the fifth lens easier to process and shape, thereby improving the performance of the lens in practice.

[0031] In some embodiments, the optical imaging system satisfies the following relationship:

[0032] TTL / Imgh<1.3;

[0033] TTL is the distance from the object side of the first lens to the image plane of the optical imaging system on the optical axis, and Imgh is half of the image height corresponding to the maximum field angle of the optical imaging system.

[0034] Satisfying the above relationship can make the optical imaging system ultra-thin and achieve the requirement of miniaturization.

[0035] In some embodiments, the optical imaging system satisfies the following relationship:

[0036] 1.0 <TTL / f<1.2;

[0037] Wherein, f is the effective focal length of the optical imaging system, and TTL is the distance from the object side of the first lens to the image plane of the optical imaging system on the optical axis.

[0038] Meeting the above relationship can achieve miniaturization design requirements, and while meeting high-definition optical performance, the effective focal length of the optical imaging system is matched with the structure.

[0039] In some embodiments, the optical imaging system satisfies the following relationship:

[0040] f*tan(HFOV)>6mm;

[0041] Wherein, f is the effective focal length of the optical imaging system, and HFOV is half of the maximum field of view of the optical imaging system.

[0042] Satisfying the above relationship can make the optical imaging system have the characteristics of a large image surface, thereby making the optical imaging system have the characteristics of high pixels and high definition.

[0043] The embodiment of the present application further proposes an imaging module, comprising:

[0044] Optical imaging systems; and

[0045] A photosensitive element is arranged on the image side of the optical imaging system.

[0046] The imaging module of the embodiment of the present invention includes an optical imaging system. The optical imaging system can achieve a large aperture and large image surface shooting function through a mixed arrangement of seven lenses with refractive power and a reasonable combination design of the convex surface and the concave surface of each lens, and can ensure that the optical imaging system has low sensitivity and good processing technology, and has high imaging quality while achieving miniaturization; and, by satisfying the above relationship, the difference in the clear aperture of the seventh lens and the sixth lens can be reasonably controlled, and the step difference on the two lens structures can be effectively reduced, so that the edge field light is smoother, and the lens processing and production stability are easy.

[0047] An embodiment of the present invention provides an electronic device, comprising: a housing and the imaging module of the above embodiment, wherein the imaging module is mounted on the housing.

[0048] The electronic device of the embodiment of the present invention includes an imaging module. The optical imaging system in the imaging module can achieve a large aperture and large image surface shooting function through a mixed arrangement of seven lenses with refractive power and a reasonable combination design of the convex surface and the concave surface of each lens, and can ensure that the optical imaging system has low sensitivity and good processing technology, and has high imaging quality while achieving miniaturization; and, by satisfying the above relationship, the difference in the clear aperture of the seventh lens and the sixth lens can be reasonably controlled, and the step difference on the two lens structures can be effectively reduced, so that the edge field light is smoother, and the lens processing and production stability are easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and / or additional aspects and advantages of the present invention may become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0050] Figure 1 It is a schematic diagram of the structure of an optical imaging system according to an example of the present invention.

[0051] Figure 2 Schematic diagram of the structure of the optical imaging system according to the first embodiment of the present invention.

[0052] Figure 3 4 is a graph of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the first embodiment of the present invention.

[0053] Figure 4 Schematic diagram of the structure of an optical imaging system according to a second embodiment of the present invention.

[0054] Figure 5 4 is a graph of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the second embodiment of the present invention.

[0055] Figure 6 Schematic diagram of the structure of an optical imaging system according to the third embodiment of the present invention.

[0056] Figure 7 4 is a graph of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the third embodiment of the present invention.

[0057] Figure 8 4 is a schematic structural diagram of an optical imaging system according to a fourth embodiment of the present invention.

[0058] Fig. 9 4 is a graph showing spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the fourth embodiment of the present invention.

[0059] Fig.10 4 is a schematic structural diagram of an optical imaging system according to a fifth embodiment of the present invention.

[0060] Fig.11 4 is a graph of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the fifth embodiment of the present invention.

[0061] Fig.12 4 is a schematic structural diagram of an optical imaging system according to a sixth embodiment of the present invention.

[0062] Fig.13 4 is a graph of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the sixth embodiment of the present invention.

[0063] Fig.14 4 is a schematic structural diagram of an optical imaging system according to a sixth embodiment of the present invention.

[0064] Fig.15 4 is a graph of spherical aberration (mm), astigmatism (mm) and distortion (%) of the optical imaging system in the sixth embodiment of the present invention.

[0065] Fig.16 Schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0066] Main component symbols

[0067] Electronic device 1000

[0068] Image acquisition module 100

[0069] Optical imaging system 10, 20, 30, 40, 50, 60, 70

[0070] First lens L1

[0071] Second lens L2

[0072] The third lens L3

[0073] The fourth lens L4

[0074] Fifth lens L5

[0075] Sixth lens L6

[0076] Seventh lens L7

[0077] IR filter L8

[0078] Aperture STO

[0079] Object side S1, S3, S5, S7, S9, S11, S13, S15

[0080] Like side S2, S4, S6, S8, S10, S12, S14, S16

[0081] Image plane S17

[0082] Photosensitive element 80

[0083] Housing 200 DETAILED DESCRIPTION

[0084] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0085] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0086] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0088] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0089] See also Figure 1 , the following is an explanation of the terms involved in the embodiments of the present application:

[0090] Field of view (FOV): In optical instruments, the angle formed by the two edges of the maximum range through which the image of the object can pass through the lens, with the lens of the optical instrument as the vertex, is called the field of view. The size of the field of view determines the field of view of the optical instrument. The larger the field of view, the larger the field of view. In other words, objects within the field of view can be photographed through the lens, and objects outside the field of view are invisible. The entire visible range corresponds one-to-one to the imaging surface of the optical instrument, and is evenly distributed into N parts from the optical axis on the imaging surface. The light of the central field of view converges at the optical axis and is recorded as 0 field of view. The light of the edge field of view converges at the farthest point from the axis and is recorded as 1.0 field of view. 0-0.5 is the inner field of view, and 0.6-1.0 is the outer field of view.

[0091] See also Figure 2 The optical imaging system 10 of the embodiment of the present invention includes, from the object side to the image side, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with refractive power, a fourth lens L4 with refractive power, a fifth lens L5 with refractive power, a sixth lens L6 with refractive power, and a seventh lens L7 with negative refractive power.

[0092] The first lens L1 has an object side surface S1 and an image side surface S2. The object side surface S1 of the first lens L1 is convex near the optical axis, and the image side surface S2 of the first lens L1 is concave near the optical axis. The second lens L2 has an object side surface S3 and an image side surface S4. The object side surface S3 of the second lens L2 is convex near the optical axis, and the image side surface S4 of the second lens L2 is concave near the optical axis. The third lens L3 has an object side surface S5 and an image side surface S6. The fourth lens L4 has an object side surface S7 and an image side surface S8. The fifth lens L5 has an object side surface S9 and an image side surface S10. The sixth lens L6 has an object side surface S11 and an image side surface S12. The seventh lens L7 has an object side surface S13 and an image side surface S14. The image side surface S14 of the seventh lens L7 is concave near the optical axis. In addition, the image side of the optical imaging system 10 also has an image surface S17. Preferably, the image surface S17 can be a receiving surface of a photosensitive element.

[0093] The optical imaging system 10 satisfies the following relationship:

[0094] (L71p1-L71p2)-(L62p1-L62p2)<0.9mm;

[0095] Please continue to read Figure 1 , L62p1 represents the maximum vertical distance between the intersection of the edge field of view and the image side surface of the sixth lens L6 and the optical axis, L62p2 represents the minimum vertical distance between the intersection of the edge field of view and the image side surface of the sixth lens L6 and the optical axis, L71p1 represents the maximum vertical distance between the intersection of the edge field of view and the object side surface of the seventh lens L7 and the optical axis, L71p2 represents the minimum vertical distance between the intersection of the edge field of view and the object side surface of the seventh lens L7 and the optical axis, and the edge field of view is the light beam that is incident on and converges to the imaging surface of the optical imaging system 10 at the farthest point from the optical axis.

[0096] The optical imaging system 10 can realize the shooting function of large aperture and large image surface through the mixed arrangement of seven lenses with refractive power and the reasonable combination design of the convex surface and concave surface of each lens, and can ensure that the optical imaging system 10 has low sensitivity and good processing technology, and has high imaging quality while achieving miniaturization; and, by satisfying the above relationship, it can reasonably control the difference in the clear aperture of the seventh lens L7 and the sixth lens L6, and can effectively reduce the step difference on the two lens structures, so that the edge field light is smoother, and it is easy to process and produce the stability of the lens.

[0097] Furthermore, the optical imaging system 10 proposed in the present invention has the characteristics of a large aperture, which allows a larger amount of light to enter than a camera lens, can improve low-light shooting conditions, and can be suitable for shooting in low-light environments such as night scenes, rainy days, and starry skies while meeting the requirements of high-definition image shooting, and has a better blurring effect. At the same time, it has the characteristics of an ultra-thin large image surface, which can improve the resolution of the system while achieving miniaturization, so that the system has a better imaging effect.

[0098] When the optical imaging system 10 is used for imaging, light emitted or reflected by the object enters the optical imaging system 10 from the object side, and passes through the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6 and the seventh lens L7 in sequence, and finally converges on the image plane S17.

[0099] In some embodiments, the image-side surface S6 of the third lens L3 is convex at the near optical axis, the object-side surface S7 of the fourth lens L4 is concave at the near optical axis, the image-side surface S8 of the fourth lens L4 is convex at the near optical axis, the object-side surface S7 of the fifth lens L5 is convex at the near optical axis, the image-side surface S8 of the fifth lens L5 is concave at the near optical axis, the object-side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S12 of the sixth lens L6 is concave at the near optical axis.

[0100] The reasonable combination of the above lenses is conducive to the large-angle light entering the optical imaging system 10, which expands the field of view of the optical imaging system 10 and facilitates the miniaturization and lightweight of the optical imaging system 10.

[0101] In some embodiments, the optical imaging system 10 further includes a stop STO. The stop STO can be disposed before the first lens L1, after the sixth lens L6, between any two lenses, or on the surface of any lens. The stop STO is used to reduce stray light and help improve image quality. Preferably, the stop STO is disposed on the object side S1 of the first lens L1.

[0102] In some embodiments, the optical imaging system 10 further includes an infrared filter L8, and the infrared filter L8 has an object-side surface S15 and an image-side surface S16. The infrared filter L8 is disposed on the image side of the seventh lens L7, and the infrared filter L8 is used to filter the imaging light, specifically to isolate the infrared light, to prevent the infrared light from being received by the photosensitive element, thereby preventing the infrared light from affecting the color and clarity of the normal image, thereby improving the imaging quality of the imaging lens 10. Preferably, the infrared filter L8 is an infrared cutoff filter.

[0103] In some embodiments, at least one surface of at least one lens in the optical imaging system 10 is aspherical, which is beneficial for correcting aberrations and improving imaging quality.

[0104] The shape of an aspheric surface is determined by the following formula:

[0105]

[0106] Among them, Z is the longitudinal distance from any point on the aspheric surface to the surface vertex, r is the distance from any point on the aspheric surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, and Ai is the correction coefficient of the i-th order aspheric surface.

[0107] In this way, the optical imaging system 10 can effectively reduce the size of the optical imaging system 10 by adjusting the curvature radius and aspheric coefficient of each lens surface, and effectively correct the aberration to improve the imaging quality.

[0108] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0109] Fno<2;

[0110] Wherein, Fno is the aperture number of the optical imaging system 10 .

[0111] Satisfying the above relationship can ensure that the optical imaging system 10 has a large aperture characteristic, and the optical imaging system 10 has sufficient light input, making the captured image clearer, and can achieve the capture of high-quality night scenes, starry sky and other object space scenes with low brightness. However, when Fno does not satisfy the above relationship, the optical imaging system 10 has a large amount of light input, and the obtained captured image has a large brightness.

[0112] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0113] R6≤-1000mm;

[0114] Here, R6 is the radius of curvature of the image-side surface S6 of the third lens L3.

[0115] When the above relationship is satisfied, the sensitivity of the optical imaging system 10 at the image side surface S6 of the third lens L3 can be effectively reduced, thereby improving the yield of the optical imaging system 10. However, when R6 does not satisfy the above relationship, the sensitivity of the optical imaging system 10 at the image side surface S6 of the third lens L3 is relatively high, which is not conducive to improving the yield of the optical imaging system 10.

[0116] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0117] (L52p1-L52p2) / CT5<7;

[0118] Please continue to read Figure 1, L52p1 represents the maximum vertical distance between the intersection of the marginal field of view and the image side surface of the fifth lens L5 and the optical axis, L52p2 represents the minimum vertical distance between the intersection of the marginal field of view and the image side surface of the fifth lens L5 and the optical axis, and CT5 is the distance between the object side surface S9 of the fifth lens L5 and the image side surface S10 of the fifth lens L5 on the optical axis.

[0119] Satisfying the above relationship can make the fifth lens L5 easier to process and shape, thereby improving the performance of the lens. However, when (L52p1-L52p2) / CT5 does not satisfy the above relationship, the processing and shaping of the fifth lens L5 is more difficult and the cost is higher.

[0120] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0121] TTL / Imgh<1.3;

[0122] TTL is the distance between the object-side surface S1 of the first lens L1 and the image surface S17 of the optical imaging system 10 on the optical axis, and Imgh is half of the image height corresponding to the maximum field angle of the optical imaging system 10 .

[0123] If the above relationship is satisfied, the optical imaging system 10 can be ultra-thin and meet the requirement of miniaturization. However, when TTL / Imgh does not satisfy the above relationship, the total length of the optical imaging system 10 is large, which is not conducive to meeting the requirement of miniaturization.

[0124] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0125] 1.0 <TTL / f<1.2;

[0126] Wherein, f is the effective focal length of the optical imaging system 10 , and TTL is the distance on the optical axis from the object-side surface S1 of the first lens L1 to the image surface S17 of the optical imaging system 10 .

[0127] Satisfying the above relationship can achieve the requirements of miniaturization design, and the effective focal length and structure of the optical imaging system 10 can be matched while meeting the high-definition optical performance. However, when TTL / f≤1.0, the optical length of the optical imaging system 10 is too short, which will increase the sensitivity of the system and make it difficult to correct aberrations; when TTL / f≥1.2, the optical length of the optical imaging system 10 is too long, which will cause the main ray angle of the light entering the image plane S17 to be too large, which does not match the main ray angle of the photosensitive element.

[0128] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0129] f*tan(HFOV)>6mm;

[0130] Wherein, f is the effective focal length of the optical imaging system 10 , and HFOV is half of the maximum field of view of the optical imaging system 10 .

[0131] When the above relationship is satisfied, the optical imaging system 10 can have the characteristics of a large image plane, so that the optical imaging system 10 has the characteristics of high pixels and high definition. However, when f*tan(HFOV) does not satisfy the above relationship, the image plane of the optical imaging system 10 is small, so that the pixels and definition of the optical imaging system 10 are low.

[0132] First embodiment

[0133] Please refer to Figure 2 and Figure 3 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0134] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is convex at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0135] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0136] The reference wavelength of the focal length in the first embodiment is 555nm, the reference wavelength of the refractive index and the Abbe number is 587nm, and the optical imaging system 10 in the first embodiment meets the conditions of the following table. The components from the object surface to the image surface S17 are arranged in the order of the components from top to bottom in Table 1. Surface numbers 1 and 2 are the object side surface S1 and the image side surface S2 of the first lens L1, respectively, that is, in the same lens, the surface with a smaller surface number is the object side surface, and the surface with a larger surface number is the image side surface. The Y radius in Table 1 is the radius of curvature of the object side surface or the image side surface of the corresponding surface number at the optical axis. The first value in the "thickness" parameter column of the first lens L1 is the thickness of the lens on the optical axis, and the second value is the distance from the image side surface of the lens to the object side surface of the next lens on the optical axis. Table 2 is a table of related parameters of the aspheric surface of each lens in Table 1, where K is the cone constant and Ai is the coefficient corresponding to the i-th high-order term in the aspheric surface shape formula.

[0137] Table 1

[0138]

[0139] Table 2

[0140]

[0141]

[0142] Second embodiment

[0143] Please refer to Figure 4 and Figure 5 The optical imaging system 20 of the second embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0144] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is concave at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0145] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0146] In the second embodiment, the reference wavelength of the focal length is 555 nm, the reference wavelength of the refractive index and the Abbe number is 587 nm, and the reference wavelength is 555 nm. The parameters of the optical imaging system 20 are given in Tables 3 and 4, and the definitions of the parameters can be obtained from the second embodiment and will not be repeated here.

[0147] Table 3

[0148]

[0149] Table 4

[0150]

[0151]

[0152] Third embodiment

[0153] Please refer to Figure 6 and Figure 7 The optical imaging system 30 of the third embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0154] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is convex at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0155] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0156] In the third embodiment, the reference wavelength of the focal length is 555 nm, the reference wavelength of the refractive index and the Abbe number is 587 nm, and the parameters of the optical imaging system 30 are given in Tables 5 and 6.

[0157] Table 5

[0158]

[0159] Table 6

[0160]

[0161]

[0162] Fourth embodiment

[0163] Please refer to Figure 8 and Fig. 9 The optical imaging system 40 of the fourth embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with positive refractive power, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0164] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is convex at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0165] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0166] In the fourth embodiment, the reference wavelength of the focal length is 555 nm, the reference wavelength of the refractive index and the Abbe number is 587 nm, and the parameters of the optical imaging system 40 are given in Tables 7 and 8.

[0167] Table 7

[0168]

[0169]

[0170] Table 8

[0171]

[0172]

[0173] Fifth embodiment

[0174] Please refer to Fig.10 and Fig.11The optical imaging system 50 of the fifth embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with positive refractive power, a sixth lens L6 with negative refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0175] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is convex at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0176] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0177] In the fifth embodiment, the reference wavelength of the focal length is 555 nm, the reference wavelength of the refractive index and the Abbe number is 587 nm, and the parameters of the optical imaging system 50 are given in Tables 9 and 10.

[0178] Table 9

[0179]

[0180]

[0181] Table 10

[0182] Surface number 1 2 3 4 5 6 7 K -7.36E+00 -2.84E+00 6.33E+01 1.01E+01 -2.76E+00 -9.80E+01 -9.80E+01 A4 8.20E-02 -1.26E-02 -2.53E-02 -1.40E-02 -1.25E-02 -8.10E-03 -4.35E-02 A6 -4.13E-02 -5.30E-03 3.51E-03 2.53E-02 -2.08E-02 -4.68E-02 2.92E-02 A8 2.95E-02 2.01E-02 2.21E-02 -4.10E-02 6.20E-02 1.22E-01 -7.56E-02 A10 -1.90E-02 -3.67E-02 -3.74E-02 7.66E-02 -1.34E-01 -2.17E-01 1.19E-01 A12 1.05E-02 3.94E-02 3.84E-02 -8.04E-02 1.78E-01 2.34E-01 -1.18E-01 A14 -4.52E-03 -2.54E-02 -2.46E-02 4.74E-02 -1.47E-01 -1.59E-01 7.35E-02 A16 1.34E-03 9.60E-03 9.53E-03 -1.42E-02 7.34E-02 6.52E-02 -2.75E-02 A18 -2.36E-04 -1.97E-03 -2.02E-03 1.41E-03 -2.03E-02 -1.48E-02 5.72E-03 A20 1.76E-05 1.68E-04 1.80E-04 1.28E-04 2.37E-03 1.42E-03 -5.22E-04 Surface number 8 9 10 11 12 13 14 K -9.80E+01 -2.49E+00 9.30E+00 4.33E-01 -6.03E+01 -4.59E+01 -8.29E+00 A4 -4.50E-02 -2.23E-02 -2.16E-02 -1.98E-02 -2.12E-02 -9.77E-02 -4.38E-02 A6 3.36E-02 3.70E-03 2.33E-03 -1.25E-03 1.85E-02 3.43E-02 1.22E-02 A8 -5.89E-02 -7.50E-03 -3.37E-03 1.62E-03 -9.59E-03 -7.95E-03 -2.41E-03 A10 6.74E-02 5.00E-03 1.23E-03 -1.96E-03 2.60E-03 1.24E-03 2.87E-04 A12 -4.79E-02 -2.37E-03 -2.55E-04 6.66E-04 -4.43E-04 -1.25E-04 -1.90E-05 A14 2.14E-02 8.00E-04 5.15E-05 -1.02E-04 4.92E-05 8.05E-06 5.83E-07 A16 -5.67E-03 -1.75E-04 -8.29E-06 7.99E-06 -3.42E-06 -3.18E-07 8.12E-10 A18 8.10E-04 2.16E-05 7.27E-07 -3.04E-07 1.34E-07 7.03E-09 -4.93E-10 A20 -4.78E-05 -1.12E-06 -2.50E-08 4.26E-09 -2.22E-09 -6.66E-11 8.56E-12

[0183] Sixth embodiment

[0184] Please refer to Fig.12 and Fig.13 The optical imaging system 60 of the sixth embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0185] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is convex at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0186] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0187] In the sixth embodiment, the reference wavelength of the focal length is 555 nm, the reference wavelength of the refractive index and the Abbe number is 587 nm, and the parameters of the optical imaging system 60 are given in Tables 11 and 12.

[0188] Table 11

[0189]

[0190]

[0191] Table 12

[0192] Surface number 1 2 3 4 5 6 7 K -7.34E+00 -3.44E+00 6.53E+01 9.57E+00 3.08E+01 9.80E+01 -9.80E+01 A4 8.21E-02 -1.57E-02 -2.70E-02 -1.54E-02 -1.11E-02 -5.02E-03 -2.94E-02 A6 -4.31E-02 3.95E-03 7.79E-04 2.71E-02 -1.44E-02 -2.70E-02 5.41E-03 A8 3.44E-02 -4.18E-03 3.32E-02 -4.85E-02 2.59E-02 4.38E-02 -4.56E-02 A10 -2.54E-02 2.69E-03 -5.25E-02 1.00E-01 -4.61E-02 -7.89E-02 7.52E-02 A12 1.55E-02 1.23E-03 5.05E-02 -1.19E-01 5.57E-02 9.07E-02 -7.39E-02 A14 -6.98E-03 -2.88E-03 -3.07E-02 8.31E-02 -4.60E-02 -6.36E-02 4.83E-02 A16 2.09E-03 1.63E-03 1.13E-02 -3.31E-02 2.39E-02 2.62E-02 -2.00E-02 A18 -3.67E-04 -4.02E-04 -2.27E-03 6.78E-03 -7.06E-03 -5.80E-03 4.74E-03 A20 2.75E-05 3.76E-05 1.92E-04 -5.09E-04 9.04E-04 5.34E-04 -4.87E-04 Surface number 8 9 10 11 12 13 14 K -9.80E+01 5.68E+00 5.18E+00 -9.87E-01 -9.80E+01 -4.23E+01 -9.56E+00 A4 -3.15E-02 -4.24E-02 -6.39E-02 -2.83E-02 2.64E-03 -9.82E-02 -4.59E-02 A6 1.16E-02 2.27E-02 2.44E-02 3.91E-04 -5.38E-03 3.30E-02 1.21E-02 A8 -2.78E-02 -1.78E-02 -8.70E-03 -1.37E-03 1.28E-03 -7.32E-03 -2.08E-03 A10 2.92E-02 1.02E-02 1.63E-03 1.38E-03 -1.45E-04 1.12E-03 2.13E-04 A12 -1.72E-02 -5.16E-03 -2.40E-04 -7.16E-04 -3.14E-05 -1.12E-04 -1.16E-05 A14 6.54E-03 1.93E-03 7.32E-05 1.82E-04 1.25E-05 7.23E-06 1.70E-07 A16 -1.54E-03 -4.48E-04 -1.65E-05 -2.34E-05 -1.57E-06 -2.86E-07 1.35E-08 A18 2.02E-04 5.66E-05 1.71E-06 1.50E-06 8.74E-08 6.35E-09 -6.84E-10 A20 -1.13E-05 -2.95E-06 -6.52E-08 -3.80E-08 -1.85E-09 -6.04E-11 9.52E-12

[0193] Seventh embodiment

[0194] Please refer to Fig.14 and Fig.15 The optical imaging system 70 of the seventh embodiment includes, from the object side to the image side, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with negative refractive power, a third lens L3 with positive refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with positive refractive power, a seventh lens L7 with negative refractive power, and an infrared filter L8.

[0195] Among them, the object side surface S1 of the first lens L1 is convex at the near optical axis, and the image side surface S2 is concave at the near optical axis; the object side surface S3 of the second lens L2 is convex at the near optical axis, and the image side surface S4 is concave at the near optical axis; the object side surface S5 of the third lens L3 is convex at the near optical axis, and the image side surface S6 is convex at the near optical axis; the object side surface S7 of the fourth lens L4 is concave at the near optical axis, and the image side surface S8 is convex at the near optical axis; the object side surface S9 of the fifth lens L5 is convex at the near optical axis, and the image side surface S10 is concave at the near optical axis; the object side surface S11 of the sixth lens L6 is convex at the near optical axis, and the image side surface S12 is concave at the near optical axis; the object side surface S13 of the seventh lens L7 is convex at the near optical axis, and the image side surface S14 is concave at the near optical axis.

[0196] The object-side surface S1 of the first lens L1 is convex near the circumference, and the image-side surface S2 is convex near the circumference; the object-side surface S3 of the second lens L2 is convex near the circumference, and the image-side surface S4 is concave near the circumference; the object-side surface S5 of the third lens L3 is concave near the circumference, and the image-side surface S6 is convex near the circumference; the object-side surface S7 of the fourth lens L4 is concave near the circumference, and the image-side surface S8 is convex near the circumference; the object-side surface S9 of the fifth lens L5 is concave near the circumference, and the image-side surface S10 is convex near the circumference; the object-side surface S11 of the sixth lens L6 is concave near the circumference, and the image-side surface S12 is convex near the circumference; the object-side surface S13 of the seventh lens L7 is concave near the circumference, and the image-side surface S14 is convex near the circumference.

[0197] In the seventh embodiment, the reference wavelength of the focal length is 555 nm, the reference wavelength of the refractive index and the Abbe number is 587 nm, and the parameters of the optical imaging system 70 are given in Tables 13 and 14.

[0198] Table 13

[0199]

[0200] Table 14

[0201] Surface number 1 2 3 4 5 6 7 K -7.31E+00 -3.36E+00 6.51E+01 9.56E+00 5.04E+01 9.80E+01 -4.90E+01 A4 8.48E-02 -1.41E-02 -2.76E-02 -1.38E-02 -5.33E-03 -1.97E-03 -3.34E-02 A6 -5.66E-02 -9.92E-03 5.32E-03 1.06E-02 -4.69E-02 -4.65E-02 3.13E-02 A8 6.93E-02 4.81E-02 1.76E-02 1.98E-02 1.13E-01 9.68E-02 -1.19E-01 A10 -7.76E-02 -9.62E-02 -2.47E-02 -5.30E-02 -1.88E-01 -1.68E-01 1.95E-01 A12 6.27E-02 1.06E-01 2.16E-02 8.22E-02 2.02E-01 1.86E-01 -1.95E-01 A14 -3.30E-02 -6.86E-02 -1.24E-02 -7.59E-02 -1.42E-01 -1.28E-01 1.25E-01 A16 1.07E-02 2.57E-02 4.40E-03 4.10E-02 6.28E-02 5.26E-02 -5.00E-02 A18 -1.91E-03 -5.17E-03 -8.33E-04 -1.19E-02 -1.59E-02 -1.19E-02 1.12E-02 A20 1.44E-04 4.32E-04 6.38E-05 1.47E-03 1.77E-03 1.13E-03 -1.09E-03 Surface number 8 9 10 11 12 13 14 K 7.11E-13 4.18E+00 5.15E+00 -9.49E-01 -4.61E+01 -6.20E+01 -9.69E+00 A4 -3.39E-02 -4.48E-02 -6.84E-02 -2.97E-02 3.79E-03 -1.05E-01 -4.61E-02 A6 2.59E-02 2.43E-02 3.12E-02 3.76E-03 -4.02E-03 3.70E-02 1.19E-02 A8 -5.84E-02 -1.60E-02 -1.41E-02 -4.79E-03 -4.39E-04 -8.64E-03 -2.01E-03 A10 6.60E-02 6.71E-03 4.49E-03 3.03E-03 5.95E-04 1.37E-03 2.01E-04 A12 -4.47E-02 -2.78E-03 -1.21E-03 -1.17E-03 -2.04E-04 -1.43E-04 -9.93E-06 A14 1.94E-02 1.03E-03 2.78E-04 2.55E-04 3.66E-05 9.47E-06 1.64E-08 A16 -5.20E-03 -2.57E-04 -4.21E-05 -3.06E-05 -3.54E-06 -3.85E-07 2.21E-08 A18 7.82E-04 3.51E-05 3.45E-06 1.88E-06 1.76E-07 8.76E-09 -9.42E-10 A20 -5.06E-05 -1.97E-06 -1.14E-07 -4.64E-08 -3.49E-09 -8.52E-11 1.27E-11

[0202] Table 15 shows the values ​​of (L71p1-L71p2)-(L62p1-L62p2), Fno, R6, (L52p1-L52p2) / CT5, TTL / Imgh, TTL / f and f*tan(HFOV) in the optical imaging system 10 of the first to fifth embodiments.

[0203] Form 15

[0204]

[0205]

[0206] Please refer to Fig.16 The imaging module 100 of the embodiment of the present invention includes an optical imaging system 10 and a photosensitive element 80 , and the photosensitive element 80 is arranged on the image side of the optical imaging system 10 .

[0207] Specifically, the photosensitive element 20 may be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0208] The optical imaging system 10 in the imaging module 100 of the embodiment of the present invention can realize the shooting function of large aperture and large image surface through the mixed arrangement of seven lenses with refractive power and the reasonable combination design of the convex surface and the concave surface of each lens, and can ensure that the optical imaging system 10 has low sensitivity and good processing technology, and has high imaging quality while achieving miniaturization; and, by satisfying the above relationship, it can reasonably control the difference in the clear aperture of the seventh lens L7 and the sixth lens L6, and can effectively reduce the step difference on the two lens structures, so that the edge field light is smoother, and it is easy to process and produce the stability of the lens.

[0209] Please continue to refer to Fig.16 The electronic device 1000 of the embodiment of the present invention includes a housing 200 and an imaging module 100 , and the imaging module 100 is installed on the housing 200 for acquiring images.

[0210] The electronic device 1000 of the embodiment of the present invention includes but is not limited to smart phones, car cameras, surveillance cameras, tablet computers, laptop computers, e-book readers, portable multimedia players (PMPs), portable phones, video phones, digital still cameras, mobile medical devices, wearable devices and other electronic devices that support imaging.

[0211] The optical imaging system 10 in the electronic device 1000 of the above embodiment can achieve the shooting function of large aperture and large image surface through the mixed arrangement of seven lenses with refractive power and the reasonable combination design of the convex surface and the concave surface of each lens, and can ensure that the optical imaging system 10 has low sensitivity and good processing technology, and has high imaging quality while achieving miniaturization; and, by satisfying the above relationship, it can reasonably control the difference in the clear aperture of the seventh lens L7 and the sixth lens L6, and can effectively reduce the step difference on the two lens structures, so that the edge field light is smoother, and the lens processing and production stability are easy.

[0212] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

Claims

1. An optical imaging system, characterized in that: There are seven lenses with refractive power, including: A first lens having positive refractive power, wherein the object side surface of the first lens is convex near the optical axis, and the image side surface of the first lens is concave near the optical axis; A second lens having negative refractive power, wherein the object side surface of the second lens is convex near the optical axis, and the image side surface of the second lens is concave near the optical axis; a third lens having refractive power; a fourth lens having a refractive power; a fifth lens having refractive power; a sixth lens having a refractive power; A seventh lens having negative refractive power, wherein the image side surface of the seventh lens is concave near the optical axis, and the image side surface of the seventh lens is aspherical; The optical imaging system satisfies the following relationship: (L71p1- L71p2)-(L62p1-L62p2)<0.9mm; Among them, L62p1 represents the maximum vertical distance between the intersection of the edge field of view and the image side of the sixth lens and the optical axis, L62p2 represents the minimum vertical distance between the intersection of the edge field of view and the image side of the sixth lens and the optical axis, L71p1 represents the maximum vertical distance between the intersection of the edge field of view and the object side of the seventh lens and the optical axis, L71p2 represents the minimum vertical distance between the intersection of the edge field of view and the object side of the seventh lens and the optical axis, and the edge field of view is the light beam farthest from the optical axis that is incident and converged to the imaging surface of the optical imaging system.

2. The optical imaging system according to claim 1, wherein: The image side surface of the third lens is convex at the near optical axis, the object side surface of the fourth lens is concave at the near optical axis, the image side surface of the fourth lens is convex at the near optical axis, the object side surface of the fifth lens is convex at the near optical axis, the image side surface of the fifth lens is concave at the near optical axis, the object side surface of the sixth lens is convex at the near optical axis, and the image side surface of the sixth lens is concave at the near optical axis.

3. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: Fno<2; Wherein, Fno is the aperture number of the optical imaging system.

4. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: R6≤-1000mm; Wherein, R6 is the curvature radius of the image side surface of the third lens.

5. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: (L52p1- L52p2) / CT5<7; Among them, L52p1 represents the maximum vertical distance between the intersection of the edge field of view and the image side surface of the fifth lens and the optical axis, L52p2 represents the minimum vertical distance between the intersection of the edge field of view and the image side surface of the fifth lens and the optical axis, and CT5 is the distance between the object side surface of the fifth lens and the image side surface of the fifth lens on the optical axis.

6. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: 1.16≤TTL / Imgh<1.3; TTL is the distance from the object side of the first lens to the image plane of the optical imaging system on the optical axis, and Imgh is half of the image height corresponding to the maximum field angle of the optical imaging system.

7. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: 1.0 <TTL / f<1.2; Wherein, f is the effective focal length of the optical imaging system, and TTL is the distance from the object side of the first lens to the image plane of the optical imaging system on the optical axis.

8. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: f*tan(HFOV)>6mm; Wherein, f is the effective focal length of the optical imaging system, and HFOV is half of the maximum field of view of the optical imaging system.

9. An imaging module, characterized in that: include: The optical imaging system according to any one of claims 1 to 8; and A photosensitive element is arranged on the image side of the optical imaging system.

10. An electronic device, characterized in that: include: case; and The imaging module described in claim 9 is mounted on the housing.

Images