Optical imaging system, imaging device and electronic device

Abstract

The present invention proposes an optical imaging system, which includes, from the object side to the image side, along the optical axis in sequence: a prism; an aperture; a first lens with positive refractive power, the object side surface of the first lens being a convex surface near the optical axis; a second lens with refractive power; a third lens with refractive power; a fourth lens with refractive power; a fifth lens with refractive power; and a sixth lens with refractive power; the optical imaging system satisfies the following relationship: 10≤f*IMGH / Y62≤25. The above-mentioned optical imaging system can enable an electronic device equipped with the optical imaging system to meet the requirements of a lightweight design; and adopts a large aperture design and reasonably distributes the refractive power, which can realize a telephoto function, and has a lower optical performance sensitivity of the optical imaging system and better imaging quality; in addition, it can balance a longer focal length and miniaturization, ensure a larger imaging surface and a larger light-collecting area, and improve the overall brightness of the imaging. The present invention also provides an imaging device and an electronic device.

Description

Technical Field

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

[0002] In recent years, various long-focal-length lenses have appeared one after another in order to capture distant scenes, highlight the main imaging object with a shallow depth of field, and match high-pixel small-size chips.

[0003] In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art: the existing three-piece, four-piece and five-piece lenses have reached corresponding technical bottlenecks, and based on the same photosensitive chip, in order to obtain higher image clarity, the total length of the lens will be increased, which restricts the thinness of the lens. Summary of the invention

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

[0005] One embodiment of the present application provides an optical imaging system, which has a total of six lenses with refractive power, which include the following lenses in order from the object side to the image side along the optical axis:

[0006] Prism;

[0007] Aperture;

[0008] A first lens having positive refractive power, wherein the object side surface of the first lens is convex at the near optical axis;

[0009] a second lens having a refractive power;

[0010] a third lens having a refracting power;

[0011] a fourth lens having a refracting power;

[0012] a fifth lens having a refractive power; and

[0013] a sixth lens having a refracting power;

[0014] The optical imaging system satisfies the following relationship:

[0015] 10≤f*IMGH / Y62≤25;

[0016] Wherein, f is the effective focal length of the optical imaging system, IMGH is half of the image height corresponding to the maximum field angle of the optical imaging system, and Y62 is the maximum effective semi-aperture of the image side of the sixth lens.

[0017] The above-mentioned optical imaging system deflects the light path by ninety degrees through an isosceles right-angle prism, thereby reducing the thickness of the optical imaging system, so that the electronic device equipped with the optical imaging system can meet the requirements of lightweight design; and adopts a large aperture design and reasonably distributes the refractive force to achieve a telephoto function, with lower optical performance sensitivity and better imaging quality of the optical imaging system; in addition, it can balance a longer focal length and miniaturization, ensure a larger imaging surface and a larger light-collecting area, and improve the overall brightness of the imaging.

[0018] In some embodiments, the optical imaging system satisfies the following relationship:

[0019] 1≤EPD / Y62≤3;

[0020] Wherein, EPD is the entrance pupil diameter of the optical imaging system, and Y62 is the maximum effective semi-aperture of the image side of the sixth lens.

[0021] In this way, light throughput and miniaturization can be balanced to improve imaging quality.

[0022] In some embodiments, the optical imaging system satisfies the following condition:

[0023] 1≤∑CT / T14≤2;

[0024] Wherein, ΣCT is the sum of thicknesses of all lenses of the optical imaging system on the optical axis, and T14 is the sum of thicknesses of the first lens, the second lens, the third lens, and the fourth lens on the optical axis.

[0025] In this way, by properly arranging the spatial positions of the lenses, the light transition can be smoother, and the field curvature of the optical imaging system can be corrected, balancing the dispersion and telephoto characteristics.

[0026] In some embodiments, the optical imaging system satisfies the following condition:

[0027] 3mm -1 ≤MVd / f≤6mm -1 ;

[0028] Wherein, MVd is the average value of the Abbe numbers of the six lenses, and f is the effective focal length of the optical imaging system.

[0029] In this way, chromatic aberration can be balanced. High Abbe numbers and low Abbe numbers correspond to different refractive indices. By combining different materials, telephoto function can be achieved and optical imaging performance can be improved.

[0030] In some embodiments, the optical imaging system satisfies the following condition:

[0031] 1° / mm≤FOV / f≤6° / mm;

[0032] Wherein, FOV is the maximum field of view of the optical imaging system, and f is the effective focal length of the optical imaging system.

[0033] In this way, the field of view angle can be controlled within a certain range, the effective focal length reaches the telephoto distance, and the telephoto function is realized.

[0034] In some embodiments, the optical imaging system satisfies the following condition:

[0035] 0.893≤TL / f≤1;

[0036] Wherein, TL is the distance from the object side of the first lens to the imaging surface of the optical imaging system on the optical axis, and f is the effective focal length of the optical imaging system.

[0037] In this way, miniaturization and telephoto characteristics can be balanced.

[0038] In some embodiments, the optical imaging system satisfies the following condition:

[0039] 1≤f / f1≤3;

[0040] Wherein, f is the effective focal length of the optical imaging system, and f1 is the effective focal length of the first lens.

[0041] In this way, the refractive power of the first lens can be within a reasonable range, thereby improving the yield of the first lens molding process; at the same time, the refractive power of the first lens occupies a suitable proportion in the overall refractive power of the optical imaging system, which is conducive to the stable transition of light.

[0042] In some embodiments, the optical imaging system satisfies the following condition:

[0043] 0≤|SAG32| / CT34≤0.276;

[0044] Among them, SAG32 is the displacement in the direction of the optical axis from the intersection of the image side surface of the third lens on the optical axis to the maximum effective radius position of the image side surface of the third lens, and CT34 is the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis.

[0045] In this way, through the reasonable layout of the optical structure, the change in direction of light after entering the optical imaging system can be slowed down, which helps to reduce the intensity of stray light, reduce the optical performance sensitivity of the optical imaging system, and improve the yield rate of the third lens.

[0046] In some embodiments, the optical imaging system satisfies the following condition:

[0047] 0≤|SAG41| / CT34≤0.486;

[0048] Among them, SAG41 is the displacement in the direction of the optical axis from the intersection of the object side surface of the fourth lens on the optical axis to the maximum effective radius position of the object side surface of the fourth lens, and CT34 is the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis.

[0049] In this way, through the reasonable layout of the optical structure, the change in direction of light after entering the optical imaging system can be slowed down, which helps to reduce the intensity of ghost images, reduce the optical performance sensitivity of the optical imaging system, and improve the yield rate of the fourth lens.

[0050] In some embodiments, the optical imaging system satisfies the following condition:

[0051] 0.344≤MINL5 / MAXL5≤1;

[0052] Wherein, MINL5 is the minimum thickness of the fifth lens in the effective area, and MAXL5 is the maximum thickness of the fifth lens in the effective area.

[0053] In this way, the thickness ratio of the fifth lens is within a suitable range, which improves the yield rate of the molding process of the fifth lens; at the same time, the aberration of the fifth lens will be maintained within a reasonable range, which is conducive to eliminating the aberration of the entire optical imaging system.

[0054] An embodiment of the present application provides an imaging device, comprising:

[0055] The above optical imaging system; and

[0056] The photosensitive element is arranged on the imaging surface of the optical imaging system.

[0057] In the above-mentioned imaging device, the optical imaging system deflects the light path by ninety degrees through an isosceles right-angle prism, thereby reducing the thickness of the optical imaging system, so that the electronic device equipped with the optical imaging system can meet the requirements of a lightweight design; and a large aperture design is adopted to reasonably distribute the refractive force, thereby realizing a telephoto function, having a lower optical performance sensitivity of the optical imaging system and better imaging quality; in addition, a balance can be achieved between a longer focal length and miniaturization, ensuring that a larger imaging surface meets a larger light-collecting area, thereby improving the overall brightness of the imaging.

[0058] An embodiment of the present application provides an electronic device, comprising:

[0059] housing; and

[0060] The above-mentioned imaging device is installed in the housing to capture images.

[0061] The image side surface of the first lens and the object side surface of the second lens are cemented to form a cemented lens.

[0062] In the above-mentioned imaging device, the optical imaging system deflects the light path by ninety degrees through an isosceles right-angle prism, thereby reducing the thickness of the optical imaging system, so that the electronic device equipped with the optical imaging system can meet the requirements of a lightweight design; and a large aperture design is adopted to reasonably distribute the refractive force, thereby realizing a telephoto function, having a lower optical performance sensitivity of the optical imaging system and better imaging quality; in addition, a balance can be achieved between a longer focal length and miniaturization, ensuring that a larger imaging surface meets a larger light-collecting area, thereby improving the overall brightness of the imaging.

[0063] Additional aspects and advantages of the embodiments of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] 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:

[0065] Figure 1 Schematic diagram of the structure of the optical imaging system according to the first embodiment of the present invention.

[0066] Figure 2 Schematic diagram of spherical aberration, astigmatism and distortion according to the first embodiment of the present invention.

[0067] Figure 3 Schematic diagram of the structure of an optical imaging system according to a second embodiment of the present invention.

[0068] Figure 4 Schematic diagram of spherical aberration, astigmatism and distortion according to the second embodiment of the present invention.

[0069] Figure 5 Schematic diagram of the structure of an optical imaging system according to the third embodiment of the present invention.

[0070] Figure 6 Schematic diagram of spherical aberration, astigmatism and distortion according to the third embodiment of the present invention.

[0071] Figure 7 4 is a schematic structural diagram of an optical imaging system according to a fourth embodiment of the present invention.

[0072] Figure 8 Schematic diagram of spherical aberration, astigmatism and distortion according to the fourth embodiment of the present invention.

[0073] Fig. 9 4 is a schematic structural diagram of an optical imaging system according to a fifth embodiment of the present invention.

[0074] Fig.10 Schematic diagram of spherical aberration, astigmatism and distortion of the fifth embodiment of the present invention.

[0075] Fig.114 is a schematic structural diagram of an optical imaging system according to a sixth embodiment of the present invention.

[0076] Fig.12 Schematic diagram of spherical aberration, astigmatism and distortion of the sixth embodiment of the present invention.

[0077] Fig.13 2 is a schematic structural diagram of an optical imaging system according to a seventh embodiment of the present invention.

[0078] Fig.14 Schematic diagram of spherical aberration, astigmatism and distortion of the seventh embodiment of the present invention.

[0079] Fig.15 Schematic diagram of the structure of an electronic device according to an embodiment of the present invention.

[0080] Main component symbols

[0081] Electronic device 1000

[0082] Image capturing device 100

[0083] Optical imaging system 10

[0084] Isosceles right angle prism L0

[0085] First lens L1

[0086] Second lens L2

[0087] The third lens L3

[0088] The fourth lens L4

[0089] Fifth lens L5

[0090] Sixth lens L6

[0091] Infrared filter L7

[0092] Aperture STO

[0093] Object side S4, S6, S8, S10, S12, S14, S16

[0094] Like the side S5, S7, S9, S11, S13, S15, S17

[0095] Imaging surface S18

[0096] Photosensitive element 20

[0097] Housing 200 DETAILED DESCRIPTION

[0098] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0099] See also Figure 1 The optical imaging system 10 of the embodiment of the present invention includes, from the object side to the image side along the optical axis LA, an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with refractive power, a third lens L3 with refractive power, a fourth lens L4 with refractive power, a fifth lens L5 with refractive power and a sixth lens L6 with refractive power, wherein the optical axis LA is substantially L-shaped.

[0100] The isosceles right prism L0 has side surfaces S1, S2, and S3, the first lens L1 has an object side surface S4 and an image side surface S5, the second lens L2 has an object side surface S6 and an image side surface S7, the third lens L3 has an object side surface S8 and an image side surface S9, the fourth lens L4 has an object side surface S10 and an image side surface S11, the fifth lens L5 has an object side surface S12 and an image side surface S13, and the sixth lens L6 has an object side surface S14 and an image side surface S15, wherein the object side surface S4 of the first lens L1 is convex at the near optical axis.

[0101] When imaging, the light incident from the outside is incident on the side S1 of the isosceles right prism L0 along the optical axis LA, is bent and turned by the isosceles right prism L0, and is emitted from the side S3 of the isosceles right prism L0 and passes through 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 in sequence along the optical axis to reach the imaging surface S18.

[0102] The optical imaging system 10 satisfies the following conditional formula:

[0103] 10≤f*IMGH / Y62≤25;

[0104] Wherein, f is the effective focal length of the optical imaging system 10, IMGH is half of the image height corresponding to the maximum field angle of the optical imaging system 10, and Y62 is the maximum effective semi-aperture of the image-side surface S12 of the sixth lens L6.

[0105] The above-mentioned optical imaging system 10 deflects the light path by ninety degrees through the isosceles right-angle prism L0, thereby reducing the thickness of the optical imaging system 10, so that the electronic device equipped with the optical imaging system 10 meets the requirements of lightweight design; and adopts a large aperture design and reasonably distributes the refractive force, which can realize the telephoto function, and has a lower optical performance sensitivity of the optical imaging system 10 and better imaging quality.

[0106] In some embodiments, the optical imaging system 10 satisfies the following conditional expression: 10.183≤f*IMGH / Y62≤21.095. In this way, a longer focal length and miniaturization can be balanced to ensure that a larger imaging surface meets a larger light-collecting area, thereby improving the overall brightness of the imaging. However, when the above conditional expression is exceeded, either the focal length of the optical imaging system 10 is longer and the volume is larger; or the focal length of the optical imaging system 10 is shorter and the volume is smaller, and it cannot be ensured that a larger imaging surface can meet a larger light-collecting area.

[0107] In some embodiments, the optical imaging system 10 further includes an infrared filter L7, and the infrared filter L7 has an object side surface S16 and an image side surface S17. The infrared filter L7 is disposed on the image side surface S15 of the sixth lens L6 to filter out light of other wavelengths such as visible light and only allow infrared light to pass, so that the optical imaging system 10 can also form images in dim environments and other special application scenarios.

[0108] In some embodiments, 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 are all made of plastic. In this case, the plastic lens can reduce the weight of the optical imaging system 10 and reduce the production cost. In some embodiments, 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 are all made of glass. In this case, the optical imaging system 10 can withstand higher temperatures and has better optical performance. In other embodiments, only the first lens L1 can be made of glass, while the other lenses are made of plastic. In this case, the first lens L1 closest to the object side can better withstand the influence of the ambient temperature of the object side, and because the other lenses are made of plastic, the production cost of the optical imaging system 10 is kept low. In other embodiments, the first lens L1 is made of glass, and the materials of the other lenses can be arbitrarily combined.

[0109] In some embodiments, the optical imaging system 10 satisfies the following relationship:

[0110] 1≤EPD / Y62≤3;

[0111] Wherein, EPD is the entrance pupil diameter of the optical imaging system 10, and Y62 is the maximum effective semi-aperture of the image side surface S15 of the sixth lens L6.

[0112] In some embodiments, the optical imaging system 10 satisfies the following conditional expression: 1.443≤EPD / Y62≤2.329. In this way, the light flux and miniaturization can be balanced to improve the imaging quality. However, when the above conditional expression is exceeded, the light flux and miniaturization of the optical imaging system 10 cannot be effectively balanced, and the imaging quality is poor.

[0113] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0114] 1≤∑CT / T14≤2;

[0115] Wherein, ΣCT is the sum of thicknesses of all lenses of the optical imaging system 10 on the optical axis, and T14 is the sum of thicknesses of the first lens L1 , the second lens L2 , the third lens L3 , and the fourth lens L4 on the optical axis.

[0116] In some embodiments, the optical imaging system 10 satisfies the following conditional expression: 1.266≤∑CT / T14≤1.563. In this way, by properly arranging the spatial positions of the lenses, the light transition is smoother, and the field curvature of the optical imaging system 10 can be corrected, and the dispersion and telephoto characteristics can be balanced. However, when the above conditional expression range is exceeded, the dispersion and telephoto characteristics of the optical imaging system 10 cannot be effectively balanced.

[0117] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0118] 3mm -1 ≤MVd / f≤6mm -1 ;

[0119] Wherein, MVd is the average value of the Abbe numbers of the six lenses L6, and f is the effective focal length of the optical imaging system 10.

[0120] Further, in some embodiments, 3.599 mm -1 ≤MVd / f≤5.919mm -1 In this way, chromatic aberration can be balanced, high Abbe number and low Abbe number correspond to different refractive indices, and by combining different materials, a telephoto function can be achieved and optical imaging performance can be improved. However, when the above conditional range is exceeded, it is not conducive to achieving the telephoto characteristics of the optical imaging system 10, and the optical imaging performance is poor.

[0121] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0122] 1° / mm≤FOV / f≤6° / mm;

[0123] Wherein, FOV is the maximum field of view of the optical imaging system 10 , and f is the effective focal length of the optical imaging system 10 .

[0124] Furthermore, in some embodiments, 1.782° / mm≤FOV / f≤5.066° / mm. In this way, the field of view angle can be controlled within a certain range, so that the effective focal length reaches the telephoto distance, and the telephoto function is realized. However, when the above conditional range is exceeded, it is not conducive to controlling the field of view angle and realizing the telephoto function.

[0125] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0126] 0.893≤TL / f≤1;

[0127] Wherein, TL is the distance from the object-side surface S4 of the first lens L1 to the imaging surface S18 of the optical imaging system 10 on the optical axis, and f is the effective focal length of the optical imaging system 10 .

[0128] Further, in some embodiments, the optical imaging system 10 satisfies the following conditional expression: 0.893≤TL / f≤0.943. In this way, miniaturization and telephoto characteristics can be balanced. However, when the above conditional expression range is exceeded, it is not conducive to the balance between miniaturization and telephoto characteristics.

[0129] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0130] 1≤f / f1≤3;

[0131] Wherein, f is the effective focal length of the optical imaging system 10, and f1 is the effective focal length of the first lens L1.

[0132] Furthermore, in some embodiments, the optical imaging system 10 satisfies the following conditional expression: 1.334≤f / f1≤2.211. In this way, the refractive power of the first lens L1 can be within a reasonable range, which improves the yield of the first lens L1 molding process; at the same time, the refractive power of the first lens L1 occupies a suitable proportion in the overall refractive power of the optical imaging system 10, which is conducive to the stable transition of light. However, when the above conditional expression range is exceeded, it is not conducive to improving the yield of the first lens L1 molding process and the stable transition of light.

[0133] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0134] 0≤|SAG32| / CT34≤0.276;

[0135] Wherein, SAG32 is the displacement in the optical axis direction from the intersection of the image side surface S8 of the third lens L3 on the optical axis to the maximum effective radius position of the image side surface S9 of the third lens L3, and CT34 is the distance between the image side surface S9 of the third lens L3 and the object side surface S10 of the fourth lens L4 on the optical axis.

[0136] Further, in some embodiments, the optical imaging system 10 satisfies the following conditional expression: 0.038≤|SAG32| / CT34≤0.276. In this way, through the reasonable layout of the optical structure, the change in direction of the light after entering the optical imaging system 10 can be slowed down, which helps to reduce the intensity of stray light, reduce the sensitivity of the optical performance of the optical imaging system, and improve the yield rate of the third lens L3. However, when the above conditional expression range is exceeded, it is not conducive to slowing down the change in direction of the light after entering the optical imaging system 10, and the yield rate of the third lens L3 is low.

[0137] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0138] 0≤|SAG41| / CT34≤0.486;

[0139] Wherein, SAG41 is the displacement in the optical axis direction from the intersection of the object-side surface S10 of the fourth lens L4 on the optical axis to the maximum effective radius position of the object-side surface S10 of the fourth lens L4, and CT34 is the distance between the image-side surface S9 of the third lens L3 and the object-side surface S10 of the fourth lens L4 on the optical axis.

[0140] Further, in some embodiments, the optical imaging system 10 satisfies the following conditional expression: 0.283≤|SAG41| / CT34≤0.486. In this way, through the reasonable layout of the optical structure, the direction change of the light after entering the optical imaging system 10 can be slowed down, which helps to reduce the intensity of the ghost image, reduce the sensitivity of the optical performance of the optical imaging system 10, and improve the yield rate of the fourth lens L4. However, when the above conditional expression range is exceeded, it is not conducive to slowing down the direction change of the light after entering the optical imaging system 10, and the yield rate of the fourth lens L4 is low.

[0141] In some embodiments, the optical imaging system 10 satisfies the following conditional formula:

[0142] 0.344≤MINL5 / MAXL5≤1;

[0143] Wherein, MINL5 is the minimum thickness of the fifth lens L5 in the effective area, and MAXL5 is the maximum thickness of the fifth lens L5 in the effective area.

[0144] Further, in some embodiments, the optical imaging system 10 satisfies the following conditional expression: 0.344≤MINL5 / MAXL5≤0.778. In this way, the thickness ratio of the fifth lens L5 is within a suitable range, which improves the yield rate of the molding process of the fifth lens L5; at the same time, the aberration of the fifth lens L5 is maintained within a reasonable range, which is conducive to eliminating the aberration of the entire optical imaging system 10. However, when the above conditional expression range is exceeded, it is not conducive to improving the yield rate of the molding process of the fifth lens L5 and eliminating the aberration of the entire optical imaging system 10.

[0145] First embodiment

[0146] Please continue to see Figure 1 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with positive refractive power, a third lens L3 with negative 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 and an infrared filter L7.

[0147] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is concave at the near optical axis; the object-side surface S6 of the second lens L2 is convex at the near optical axis, and the image-side surface S7 of the second lens L2 is convex at the near optical axis; the object-side surface S8 of the third lens L3 is convex at the near optical axis, and the image-side surface S9 of the third lens L3 is concave at the near optical axis, the object-side surface S10 of the fourth lens L4 is concave at the near optical axis, and the image-side surface S11 of the fourth lens L4 is convex at the near optical axis; the object-side surface S12 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S13 of the fifth lens L5 is concave at the near optical axis; the object-side surface S14 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S15 of the sixth lens L6 is convex at the near optical axis.

[0148] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is concave near the circumference; the object-side surface S6 of the second lens L2 is convex near the circumference, and the image-side surface S7 of the second lens L2 is convex near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0149] See also Figure 2 , Figure 2 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the first embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the first embodiment meets the conditions in the following table.

[0150] Table 1

[0151]

[0152]

[0153] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0154] Table 2

[0155]

[0156]

[0157] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0158]

[0159] Among them, Z is the longitudinal distance between any point on the aspherical surface and the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the correction coefficient of the i-th order aspherical surface, and Table 2 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror S4-S15 in Example 1.

[0160] Second embodiment

[0161] See also Figure 3 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with positive refractive power, a third lens L3 with negative refractive power, a fourth lens L4 with negative refractive power, a fifth lens L5 with negative refractive power, a sixth lens L6 with negative refractive power and an infrared filter L7.

[0162] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is concave at the near optical axis; the object-side surface S6 of the second lens L2 is convex at the near optical axis, and the image-side surface S7 of the second lens L2 is concave at the near optical axis; the object-side surface S8 of the third lens L3 is convex at the near optical axis, and the image-side surface S9 of the third lens L3 is concave at the near optical axis, the object-side surface S10 of the fourth lens L4 is concave at the near optical axis, and the image-side surface S11 of the fourth lens L4 is convex at the near optical axis; the object-side surface S12 of the fifth lens L5 is convex at the near optical axis, and the image-side surface S13 of the fifth lens L5 is concave at the near optical axis; the object-side surface S14 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S15 of the sixth lens L6 is concave at the near optical axis.

[0163] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is concave near the circumference; the object-side surface S6 of the second lens L2 is convex near the circumference, and the image-side surface S7 of the second lens L2 is concave near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0164] See also Figure 4 , Figure 4 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the second embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the second embodiment meets the conditions in the following table.

[0165] Table 3

[0166]

[0167]

[0168] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0169] Table 4

[0170]

[0171]

[0172] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0173]

[0174] Among them, Z is the longitudinal distance between any point on the aspherical surface and the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the correction coefficient of the i-th order aspherical surface, and Table 4 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror S4-S15 in Example 2.

[0175] Third embodiment

[0176] See also Figure 5 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with positive refractive power, a third lens L3 with negative 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 and an infrared filter L7.

[0177] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is concave at the near optical axis; the object-side surface S6 of the second lens L2 is convex at the near optical axis, and the image-side surface S7 of the second lens L2 is concave at the near optical axis; the object-side surface S8 of the third lens L3 is concave at the near optical axis, and the image-side surface S9 of the third lens L3 is convex at the near optical axis, the object-side surface S10 of the fourth lens L4 is concave at the near optical axis, and the image-side surface S11 of the fourth lens L4 is convex at the near optical axis; the object-side surface S12 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S13 of the fifth lens L5 is concave at the near optical axis; the object-side surface S14 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S15 of the sixth lens L6 is convex at the near optical axis.

[0178] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is convex near the circumference; the object-side surface S6 of the second lens L2 is concave near the circumference, and the image-side surface S7 of the second lens L2 is convex near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0179] See also Figure 6 , Figure 6 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the third embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the third embodiment meets the conditions in the following table.

[0180] Table 5

[0181]

[0182] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0183] Table 6

[0184]

[0185]

[0186] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0187]

[0188] Among them, Z is the longitudinal distance between any point on the aspherical surface and the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the correction coefficient of the i-th order aspherical surface, and Table 6 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror S4-S15 in Example 3.

[0189] Fourth embodiment

[0190] See also Figure 7 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with positive 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 and an infrared filter L7.

[0191] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is concave at the near optical axis; the object-side surface S6 of the second lens L2 is convex at the near optical axis, and the image-side surface S7 of the second lens L2 is convex at the near optical axis; the object-side surface S8 of the third lens L3 is convex at the near optical axis, and the image-side surface S9 of the third lens L3 is concave at the near optical axis, the object-side surface S10 of the fourth lens L4 is concave at the near optical axis, and the image-side surface S11 of the fourth lens L4 is convex at the near optical axis; the object-side surface S12 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S13 of the fifth lens L5 is concave at the near optical axis; the object-side surface S14 of the sixth lens L6 is concave at the near optical axis, and the image-side surface S15 of the sixth lens L6 is convex at the near optical axis.

[0192] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is concave near the circumference; the object-side surface S6 of the second lens L2 is convex near the circumference, and the image-side surface S7 of the second lens L2 is concave near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0193] See also Figure 8 , Figure 8 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the fourth embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the fourth embodiment meets the conditions in the following table.

[0194] Table 7

[0195]

[0196]

[0197] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0198] Table 8

[0199]

[0200] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0201]

[0202] Wherein, Z is the longitudinal distance between any point on the aspheric surface and 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, Ai is the correction coefficient of the i-th order aspheric surface, and Table 8 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror surface S4-S15 in Example 4.

[0203] Fifth embodiment

[0204] See also Fig. 9 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with positive 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 and an infrared filter L7.

[0205] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is convex at the near optical axis; the object-side surface S6 of the second lens L2 is concave at the near optical axis, and the image-side surface S7 of the second lens L2 is convex at the near optical axis; the object-side surface S8 of the third lens L3 is convex at the near optical axis, and the image-side surface S9 of the third lens L3 is concave at the near optical axis, the object-side surface S10 of the fourth lens L4 is concave at the near optical axis, and the image-side surface S11 of the fourth lens L4 is convex at the near optical axis; the object-side surface S12 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S13 of the fifth lens L5 is concave at the near optical axis; the object-side surface S14 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S15 of the sixth lens L6 is convex at the near optical axis.

[0206] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is concave near the circumference; the object-side surface S6 of the second lens L2 is convex near the circumference, and the image-side surface S7 of the second lens L2 is concave near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0207] See also Fig.10 , Fig.10 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the fifth embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the fifth embodiment meets the conditions in the following table.

[0208] Form 9

[0209]

[0210]

[0211] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0212] Table 10

[0213]

[0214]

[0215] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0216]

[0217] Among them, Z is the longitudinal distance between any point on the aspherical surface and the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the correction coefficient of the i-th order aspherical surface, and Table 10 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror surface S4-S15 in Example 5.

[0218] Sixth embodiment

[0219] See also Fig.11 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, an aperture STO, a first lens L1 with positive refractive power, a second lens L2 with positive refractive power, a third lens L3 with negative refractive power, a fourth lens L4 with positive refractive power, a fifth lens L5 with positive refractive power, a sixth lens L6 with negative refractive power and an infrared filter L7.

[0220] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is concave at the near optical axis; the object-side surface S6 of the second lens L2 is convex at the near optical axis, and the image-side surface S7 of the second lens L2 is convex at the near optical axis; the object-side surface S8 of the third lens L3 is convex at the near optical axis, and the image-side surface S9 of the third lens L3 is concave at the near optical axis, the object-side surface S10 of the fourth lens L4 is convex at the near optical axis, and the image-side surface S11 of the fourth lens L4 is concave at the near optical axis; the object-side surface S12 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S13 of the fifth lens L5 is convex at the near optical axis; the object-side surface S14 of the sixth lens L6 is concave at the near optical axis, and the image-side surface S15 of the sixth lens L6 is convex at the near optical axis.

[0221] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is concave near the circumference; the object-side surface S6 of the second lens L2 is convex near the circumference, and the image-side surface S7 of the second lens L2 is convex near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0222] See also Fig.12 , Fig.12 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the sixth embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the sixth embodiment meets the conditions in the following table.

[0223] Table 11

[0224]

[0225]

[0226] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0227] Table 12

[0228]

[0229]

[0230] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0231]

[0232] Among them, Z is the longitudinal distance between any point on the aspherical surface and the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the correction coefficient of the i-th order aspherical surface, and Table 12 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror S4-S15 in Example 6.

[0233] Seventh embodiment

[0234] See also Fig.13 In the optical imaging system 10 in this embodiment, from the object side to the image side, it includes an isosceles right prism L0, 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 and an infrared filter L7.

[0235] In this embodiment, the object-side surface S4 of the first lens L1 is convex at the near optical axis, and the image-side surface S5 of the first lens L1 is concave at the near optical axis; the object-side surface S6 of the second lens L2 is convex at the near optical axis, and the image-side surface S7 of the second lens L2 is concave at the near optical axis; the object-side surface S8 of the third lens L3 is convex at the near optical axis, and the image-side surface S9 of the third lens L3 is concave at the near optical axis, the object-side surface S10 of the fourth lens L4 is concave at the near optical axis, and the image-side surface S11 of the fourth lens L4 is convex at the near optical axis; the object-side surface S12 of the fifth lens L5 is concave at the near optical axis, and the image-side surface S13 of the fifth lens L5 is convex at the near optical axis; the object-side surface S14 of the sixth lens L6 is convex at the near optical axis, and the image-side surface S15 of the sixth lens L6 is concave at the near optical axis.

[0236] The object-side surface S4 of the first lens L1 is convex near the circumference, and the image-side surface S5 of the first lens L1 is concave near the circumference; the object-side surface S6 of the second lens L2 is convex near the circumference, and the image-side surface S7 of the second lens L2 is convex near the circumference; the object-side surface S8 of the third lens L3 is convex near the circumference, and the image-side surface S9 of the third lens L3 is concave near the circumference, the object-side surface S10 of the fourth lens L4 is concave near the circumference, and the image-side surface S11 of the fourth lens L4 is convex near the circumference; the object-side surface S12 of the fifth lens L5 is concave near the circumference, and the image-side surface S13 of the fifth lens L5 is convex near the circumference; the object-side surface S14 of the sixth lens L6 is concave near the circumference, and the image-side surface S15 of the sixth lens L6 is convex near the circumference.

[0237] See also Fig.14 , Fig.14 The spherical aberration (mm), astigmatism (mm) and distortion diagram (%) of the optical imaging system 10 in the seventh embodiment, wherein the reference wavelength of the focal length, Abbe number and refractive index are all 587.5618 nm. The optical imaging system 10 in the seventh embodiment meets the conditions in the following table.

[0238] Table 13

[0239]

[0240] It should be noted that f is the focal length of the optical imaging system 10 , FNO is the aperture number of the optical imaging system 10 , and FOV is the maximum field of view of the optical imaging system 10 .

[0241] Table 14

[0242]

[0243]

[0244] It should be noted that 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 are all aspherical lenses. The shape of the aspherical surface is determined by the following formula:

[0245]

[0246] Among them, Z is the longitudinal distance between any point on the aspherical surface and the surface vertex, r is the distance from any point on the aspherical surface to the optical axis, c is the vertex curvature (the inverse of the radius of curvature), k is the cone constant, Ai is the correction coefficient of the i-th order aspherical surface, and Table 14 gives the high-order coefficients K, A4, A6, A8, A10... that can be used for each spherical mirror S4-S15 in Example 7.

[0247] Table 15 shows the values ​​of f*IMGH / Y62, EPD / Y62, ∑CT / T14, MVd / f, FOV / f, TL / f, f / f1, |SAG32| / CT34, |SAG41| / CT34 and MINL5 / MAXL5 in the optical imaging system 10 of the first to seventh embodiments.

[0248] Form 15

[0249] (f*IMGH / Y62) EPD / Y62 ∑CT / T14 MVd / f FOV / f one 13.193mm 1.939 1.476 <![CDATA[4.719mm -1 ]]> 3.497° / mm two 12.019mm 1.646 1.56 <![CDATA[4.97mm -1 ]]> 3.245° / mm three 10.592mm 1.516 1.563 <![CDATA[5.615mm -1 ]]> 4.466° / mm Four 14.009mm 2.152 1.447 <![CDATA[3.599mm -1 ]]> 1.782° / mm five 10.183mm 1.443 1.461 <![CDATA[5.919mm -1 ]]> 5.066° / mm six 12.071mm 1.726 1.429 <![CDATA[4.582mm -1 ]]> 3.585° / mm seven 21.095mm 2.329 1.266 <![CDATA[3.993mm -1 ]]> 3.275° / mm MINL5 / MAXL5 f / f1 |SAG32| / CT34 |SAG41| / CT34 TL / f one 0.406 1.667 0.152 0.283 0.913 two 0.658 1.652 0.188 0.407 0.939 three 0.406 1.639 0.059 0.486 0.922 Four 0.5 1.468 0.1 0.37 0.905 five 0.478 2.211 0.066 0.355 0.928 six 0.344 1.334 0.038 0.313 0.943 seven 0.778 1.49 0.276 0.326 0.893

[0250] See also Fig.15 The optical imaging system 10 of the embodiment of the present invention can be applied to the imaging device 100 of the embodiment of the present invention. The imaging device 100 includes a photosensitive element 20 and the optical imaging system 10 of any of the above embodiments. The photosensitive element 20 is disposed on the image side of the optical imaging system 10.

[0251] The photosensitive element 20 may be a complementary metal oxide semiconductor (CMOS) image sensor or a charge-coupled device (CCD).

[0252] Please continue to see Fig.15 The imaging device 100 of the embodiment of the present invention can be applied to the electronic device 1000 of the embodiment of the present invention. The electronic device 1000 includes a housing 200 and the imaging device 100. The imaging device 100 is installed in the housing 200 to acquire images.

[0253] The electronic device 1000 of the embodiment of the present invention can be applied to vehicle-mounted, automatic driving and monitoring devices, wherein the electronic device 1000 includes but is not limited to driving recorders, smart phones, 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.

[0254] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all variations that fall within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0255] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. An optical imaging system, characterized in that: There are six lenses with refractive power, including: Prism; Aperture; A first lens having positive refractive power, wherein the object side surface of the first lens is convex at the near optical axis; a second lens having a refractive power; a third lens having a refracting power; a fourth lens having a refracting power; a fifth lens having a refractive power; and a sixth lens having a refracting power; The optical imaging system satisfies the following relationship: 10mm≤f*IMGH / Y62≤25mm; Wherein, f is the effective focal length of the optical imaging system, IMGH is half of the image height corresponding to the maximum field angle of the optical imaging system, and Y62 is the maximum effective semi-aperture of the image side of the sixth lens.

2. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following relationship: 1≤EPD / Y62≤3; Wherein, EPD is the entrance pupil diameter of the optical imaging system, and Y62 is the maximum effective semi-aperture of the image side of the sixth lens.

3. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 1≤∑CT / T14≤2; Wherein, ΣCT is the sum of thicknesses of all lenses of the optical imaging system on the optical axis, and T14 is the sum of thicknesses of the first lens, the second lens, the third lens, and the fourth lens on the optical axis.

4. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 3mm -1 ≤MVd / f≤6mm -1 ; Wherein, MVd is the average value of the Abbe numbers of the six lenses, and f is the effective focal length of the optical imaging system.

5. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 1° / mm≤FOV / f≤6° / mm; Wherein, FOV is the maximum field of view of the optical imaging system, and f is the effective focal length of the optical imaging system.

6. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 0.893≤TL / f≤1; Wherein, TL is the distance from the object side of the first lens to the imaging surface of the optical imaging system on the optical axis, and f is the effective focal length of the optical imaging system.

7. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 1≤f / f1≤3; Wherein, f is the effective focal length of the optical imaging system, and f1 is the effective focal length of the first lens.

8. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 0≤|SAG32| / CT34≤0.276; Among them, SAG32 is the displacement in the direction of the optical axis from the intersection of the image side surface of the third lens on the optical axis to the maximum effective radius position of the image side surface of the third lens, and CT34 is the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis.

9. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 0≤|SAG41| / CT34≤0.486; Among them, SAG41 is the displacement in the direction of the optical axis from the intersection of the object side surface of the fourth lens on the optical axis to the maximum effective radius position of the object side surface of the fourth lens, and CT34 is the distance between the image side surface of the third lens and the object side surface of the fourth lens on the optical axis.

10. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 0.344≤MINL5 / MAXL5≤1; Wherein, MINL5 is the minimum thickness of the fifth lens in the effective area, and MAXL5 is the maximum thickness of the fifth lens in the effective area.

11. An imaging device, characterized in that: include: The optical imaging system according to any one of claims 1 to 10; and The photosensitive element is arranged on the imaging surface of the optical imaging system.

12. An electronic device, characterized in that: include: case; and The imaging device according to claim 11, wherein the imaging device is installed in the housing to acquire images.

Images