Optical imaging system, camera module and electronic device
Patent Information
- Application Number
- CN202111643718.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-12-29
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2041-12-29
AI Technical Summary
[0003]然而，现有手机摄像模组的夜景、抓拍、视频、背景虚化等功能还存在问题，大光圈与低总高存在相互制约的关系
Smart Images
Figure CN116430539B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical technology, and in particular to an optical imaging system, a camera module, and an electronic device. Background Technology
[0002] With the increasing demand for mobile phone photography and the improvement of image quality in mobile phone camera modules, multi-camera modules have become the mainstream in mobile phone camera modules. Among them, the main camera lens is the most commonly used lens in mobile phone cameras. The main camera lenses used in flagship phones are often 7P or higher, with more complex surface shapes and manufacturing processes, and higher requirements for lens manufacturing processes and tolerances. The main camera lens has high requirements for infinity imaging quality and macro performance. Moreover, with the changing needs of the main camera lens in different scenarios, miniaturization, large image size, and large aperture have become the mainstream of mobile phone camera modules.
[0003] However, existing mobile phone camera modules still have issues with night scene mode, snapshot, video, and background blur functions, as there is a trade-off between large aperture and low overall image quality. Conventional main camera lenses use image-plane autofocus to compensate for the defocusing caused by changes in object distance. The drawback of this method is that the dispersion caused by changes in object distance cannot be effectively compensated. Summary of the Invention
[0004] In view of the above, it is necessary to propose an optical imaging system, a camera module, and an electronic device, so that the optical imaging system can obtain high image quality while meeting certain requirements of the main camera lens.
[0005] A first aspect of this application provides an optical imaging system used in conjunction with a pop-out mechanism. The optical imaging system includes a first lens to an Nth lens sequentially arranged along the optical axis from the object side to the image side. Each of the first lens to the Nth lens has an optical power, wherein 7 ≤ N ≤ 10.
[0006] The first lens to the Nth lens are divided into a first group and a second group from the object side to the image side. The first group has positive optical power, and the second group is fixed at a distance from the image plane along the optical axis. That is, the first group and the second group are arranged sequentially from the object side to the image side. The total number of lenses in the first group and the second group is N. The number of lenses included in each group in the first group and the second group can be set according to the actual application scenario. For example, if N=7, the first group includes 5 lenses and the second group includes 2 lenses.
[0007] The ejection mechanism is used to drive the first group to eject from the non-working position to the working position along the optical axis, wherein the working position and the non-working position are arranged sequentially from the object side to the image side; the optical imaging system satisfies the following relationship:
[0008] 0 <ImgH / TTL≤1;
[0009] Wherein, TTL is the total optical length of the optical imaging system when the first group is in the working position; ImgH is the image height corresponding to half of the maximum field of view of the optical imaging system.
[0010] In this embodiment, the first group is popped from the non-working position to the working position by a pop-out mechanism to achieve group pop-out, so as to realize the automatic focusing of the optical imaging system. By reasonably configuring the correspondence between the maximum image height and the total optical length, the ultra-thin characteristics of the optical imaging system are realized, and miniaturization is achieved.
[0011] In some embodiments, the first group includes M lenses from the object side to the image side, where 5 ≤ M ≤ 8; the second group includes 2 lenses from the object side to the image side. By appropriately configuring the number of lenses in the first and second groups, the imaging quality of the optical imaging system can be improved.
[0012] In some embodiments, if N=7, then the fourth, fifth and sixth lenses all have positive optical power, and the third and seventh lenses all have negative optical power.
[0013] By rationally configuring the optical power of each lens, the thickness of the optical imaging system can be reduced and the imaging quality improved.
[0014] In some embodiments, when the first group is in a non-operating position, the optical imaging system satisfies the following relationship:
[0015] 0 <TTL0 / TTL<0.8;
[0016] Wherein, TTL0 is the total optical length of the optical imaging system when the first group is in the non-working position.
[0017] By reasonably limiting the total optical length of the first group in both the working and non-working positions, the total thickness of the optical imaging system can be reduced, facilitating the miniaturization design of the optical imaging system.
[0018] In some embodiments, the optical imaging system satisfies the following relationship:
[0019] 1.4 ≤ FNO ≤ 2.4;
[0020] Wherein, FNO is the aperture value of the optical imaging system.
[0021] By properly configuring the aperture value of the optical imaging system, we can ensure that the optical imaging system meets the requirements of a large aperture.
[0022] In some embodiments, the optical imaging system satisfies the following relationship:
[0023] 0 ≤ |f2 / f3| ≤ 0.7;
[0024] Where f2 is the effective focal length of the second lens and f3 is the effective focal length of the third lens.
[0025] By rationally configuring the relationship between the effective focal lengths of the second and third lenses, the thickness of the optical imaging system can be reduced.
[0026] In some embodiments, the optical imaging system satisfies the following relationship:
[0027] 0≤|fN / f|≤2;
[0028] Where fN is the effective focal length of the Nth lens, and f is the effective focal length of the optical imaging system.
[0029] In some embodiments, the image-side surface of the fourth lens is convex.
[0030] In some embodiments, among the first lens to the Nth lens, the Nth lens has the largest aperture.
[0031] A second aspect of this application provides a camera module, including an optical imaging system as described in the above embodiments and a pop-up mechanism used in conjunction with the optical imaging system.
[0032] In some embodiments, the camera module further includes a photosensitive element located on the image side of the optical imaging system. The photosensitive element is 1 foot in size and is also referred to as a target detector. Adding a target detector improves the resolution of the camera module.
[0033] A third aspect of this application provides an electronic device including the camera module described in the above embodiments. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the first state of the optical imaging system provided in this application.
[0035] Figure 2 This is a schematic diagram of the second state of the optical imaging system provided in this application.
[0036] Figure 3 This is a schematic diagram of the second state of the optical imaging system provided in this application.
[0037] Figure 4 This is a schematic diagram of the optical imaging system provided in the first embodiment of this application.
[0038] Figure 5 This is the defocus curve provided in the first embodiment of this application.
[0039] Figure 6 This is the optical distortion diagram provided in the first embodiment of this application.
[0040] Figure 7 This is a schematic diagram of the optical imaging system provided in the second embodiment of this application.
[0041] Figure 8 This is the defocus curve provided in the second embodiment of this application.
[0042] Figure 9 This is the optical distortion diagram provided in the second embodiment of this application.
[0043] Figure 10 This is a schematic diagram of the optical imaging system provided in the third embodiment of this application.
[0044] Figure 11 This is the defocus curve provided in the third embodiment of this application.
[0045] Figure 12 This is the optical distortion diagram provided in the third embodiment of this application.
[0046] Figure 13 This is a schematic diagram of the optical imaging system provided in the fourth embodiment of this application.
[0047] Figure 14 This is the ball defocus curve provided in the fourth embodiment of this application.
[0048] Figure 15 This is the optical distortion diagram provided in the fourth embodiment of this application.
[0049] Figure 16 This is a schematic diagram of the optical imaging system provided in the fifth embodiment of this application.
[0050] Figure 17 This is the defocus curve provided in the fifth embodiment of this application.
[0051] Figure 18 This is the optical distortion diagram provided in the fifth embodiment of this application.
[0052] Figure 19 This is a schematic diagram of the optical imaging system provided in the sixth embodiment of this application.
[0053] Figure 20 This is the defocus curve provided in the sixth embodiment of this application.
[0054] Figure 21 This is the optical distortion diagram provided in the sixth embodiment of this application.
[0055] Figure 22 This is a schematic diagram of the structure of the camera module according to an embodiment of this application.
[0056] Figure 23 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application.
[0057] Explanation of main component symbols
[0058] Optical Imaging System 10
[0059] Pop-up mechanism 20
[0060] Fastener 21
[0061] Elastic element 22
[0062] Pop-up item 23
[0063] First lens L1
[0064] Second lens L2
[0065] Third lens L3
[0066] Fourth lens L4
[0067] Fifth lens L5
[0068] Sixth lens L6
[0069] Group 1 G1
[0070] Group 2, G2
[0071] IR filter
[0072] Imaging plane IMG
[0073] Camera module 100
[0074] Photosensitive element 30
[0075] Casing 200
[0076] 1000 electronic devices Detailed Implementation
[0077] The embodiments of this application are described below with reference to the accompanying drawings.
[0078] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0079] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0080] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0081] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0082] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.
[0083] For ease of understanding, the technical terms used in this application will be explained and described below.
[0084] The optical axis is the direction in which light rays travel through an optical system, referenced to the principal ray at the center of the field of view. For symmetrical transmission systems, it generally coincides with the rotation center line of the optical system. For off-axis and reflective systems, the optical axis may appear as a broken line.
[0085] The focal point is the point at which all light rays converge when they enter a convex lens, parallel to the optical axis. Ideally, a convex lens should be such that all light rays converge at a single point behind the lens.
[0086] Focal length, also known as focal length, is a measure of the convergence or divergence of light in an optical system. It refers to the distance from the optical center of a lens or lens group to the focal point when a distant object is projected into a sharp image on the focal plane. It can also be understood as the perpendicular distance from the optical center of the lens or lens group to the focal plane. From a practical perspective, it can be understood as the distance from the center of the lens to the image plane. For prime lenses, the position of their optical center remains fixed, therefore the focal length is fixed. For zoom lenses, changes in the optical center result in changes in the focal length, thus the focal length can be adjusted.
[0087] Spherical and aspherical lenses primarily refer to the lens geometry of lenses (various cameras, microscopes, etc.) and eyeglasses (including contact lenses), namely spherical lenses and aspherical lenses. The difference in their geometry determines the difference in the direction of refraction of parallel incident light, thus affecting the quality of their image formation.
[0088] A spherical lens is a lens whose surface is curved like a sphere, and its cross-section is also curved. When light rays of different wavelengths are incident on different positions on the lens along the optical axis, they cannot be focused into a single point on the film plane (the plane perpendicular to the line connecting the lens center and the lens focal point, passing through the focal point), resulting in aberrations that affect image quality, such as decreased sharpness and distortion.
[0089] An aspherical lens is not a spherical surface; instead, a small portion of the lens edge is removed, resulting in a flat cross-section. When light rays strike an aspherical reflective surface, they are focused at a single point, on the film plane, thus eliminating various aberrations.
[0090] With the lens as the boundary, the side where the object is located is called the object side, and the surface of the lens closest to the object side can be called the object side surface.
[0091] Using the lens as a boundary, the side where the image of the photographed object is located is called the image side, and the surface of the lens closest to the image side can be called the image-side surface.
[0092] This application provides an optical imaging system 10 that meets the requirements of low total height, large aperture, and large target area, thereby achieving higher imaging quality. The optical imaging system 10 provided in this application embodiment will be described in detail below with reference to the accompanying drawings.
[0093] It should be noted that the "optical imaging system" in the embodiments of this application may also be expressed as "optical system" or "optical lens" in some embodiments.
[0094] Please see Figure 1 The optical imaging system 10 of this application embodiment includes a first lens to an Nth lens arranged sequentially along the optical axis from the object side to the image side. The first lens to the Nth lens have optical power, wherein 7≤N≤10. The optical imaging system 10 is used in conjunction with a pop-out mechanism 20.
[0095] like Figure 1 As shown, N=7, the optical imaging system 10 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, and a seventh lens L7 arranged sequentially along the optical axis from the object side to the image side, and an imaging plane IMG; the seven lenses, from the first lens L1 to the seventh lens L7, are divided into a first group G1 and a second group G2. The first group G1 has positive optical power, and the distance between the second group G2 and the image plane along the optical axis is fixed. A pop-out mechanism 20 is connected to the first group G1 and is used to drive the first group G1 from... Figure 1 The non-working location shown pops up to Figure 2 The working position is shown, and the optical imaging system 10 is automatically focused.
[0096] When the first group G1 is in the non-working position, the optical imaging system 10 is in the non-working state; when the first group G1 is in the working position, the optical imaging system 10 is in the working state.
[0097] When the first group G1 is in the working position, the optical imaging system 10 can be used normally; when the first group G1 is in the non-working position, the optical imaging system 10 is in a non-working state.
[0098] In this embodiment, the pop-out mechanism 20 includes a fixing member 21, an elastic member 22, and a pop-out member 23. One end of the elastic member 22 is connected to the fixing member 21, and the other end of the elastic member 22 is connected to the pop-out member 23. The first group G1 is housed in the pop-out member 23. The elastic member 22 can be controlled to extend or retract to move the pop-out member 23, and the pop-out member 23 causes the first group G1 to pop out from its non-working position to its working position. The elastic member 22 can be a spring or a sheet, etc.
[0099] Optionally, both the fixing member 21 and the ejector member 23 include magnetic elements. By charging the corresponding magnetic elements, the fixing member 21 and the ejector member 23 repel each other and stretch the elastic member 22, thereby enabling the ejector member 23 to eject the first group G1 from the non-working position to the working position. Further, by changing the direction of the current, the charged fixing member 21 and the ejector member 23 attract each other and compress the elastic member 22, thereby enabling the ejector member 23 to return the first group G1 from the working position to the non-working position.
[0100] Understandable. Figure 1 The pop-up mechanism 20 shown is only one example provided by this application. This application does not limit the specific structure of the pop-up mechanism 20, as long as the pop-up mechanism 20 can drive the first group G1 to pop out from the non-working position to the working position. Therefore, the pop-up mechanism 20 is not shown in the following embodiments of this application.
[0101] Optionally, the pop-out mechanism 20 is also used to move the first group G1 from the working position to the non-working position; of course, other mechanisms can also be used to move the first group G1 from the working position to the non-working position, and this application does not limit this.
[0102] in, Figure 3 This is a schematic diagram of the combination of a pop-out mechanism 20 and an optical imaging system 10 according to this application. The pop-out mechanism 20 is connected to the first group G1, and the pop-out mechanism 20 can drive the first group G1 to pop out relative to the second group G2.
[0103] Figure 1 The number of lenses shown is 7, but it can be understood that the number of lenses could also be 8, 9, or 10. The above-mentioned specific lenses are distributed to the first group G1 and the second group G2, that is, the number of lenses in the first group G1 and the second group G2 can be 8, 9, or 10, and is the same as the total number of lenses in the optical imaging system 10.
[0104] In some embodiments, the optical imaging system 10 satisfies the following relationship:
[0105] 0 <ImgH / TTL≤1;
[0106] Where TTL is the total optical length of the optical imaging system 10 when the first group G1 is in the working position; ImgH is the image height corresponding to half of the maximum field of view of the optical imaging system 10.
[0107] Thus, by popping out the first group G1 from the non-working position to the working position through the pop-out mechanism 20, the group pop-out is realized, so as to realize the automatic focusing of the optical imaging system 10. By reasonably configuring the correspondence between the maximum image height and the total optical length, the ultra-thin characteristics of the optical imaging system 10 are realized, and miniaturization is achieved.
[0108] In one embodiment, the pop-out mechanism 20 drives the first group G1 to pop out from the non-working position to the working position, and the first group G1 moves a distance of 0.6 mm along the optical axis.
[0109] In some embodiments, the first group G1 includes M lenses from the object side to the image side, where 5 ≤ M ≤ 8; the second group G2 includes 2 lenses from the object side to the image side. By reasonably configuring the number of lenses in the first group G1 and the second group G2, the imaging quality of the optical imaging system 10 can be improved.
[0110] In some embodiments, if N = 7, then the fourth lens L4, the fifth lens L5, and the sixth lens L6 all have positive optical power, and the third lens L3 and the seventh lens L7 all have negative optical power. By rationally configuring the optical power of each lens, the thickness of the optical imaging system 10 is reduced and the imaging quality is improved.
[0111] In some embodiments, when the first group G1 is in a non-operating position, the optical imaging system 10 satisfies the following relationship:
[0112] 0 <TTL0 / TTL<0.8;
[0113] Wherein, TTL0 is the total optical length of the optical imaging system 10 when the first group G1 is in the non-working position. By reasonably limiting the total optical length of the first group G1 in the working and non-working positions, the total thickness of the optical imaging system 10 can be reduced, facilitating the miniaturization design of the optical imaging system 10.
[0114] In one embodiment, when the first group G1 is in the non-working position, the total optical length of the optical imaging system 10 is 8.12 mm; when the first group G1 is in the working position, the total optical length of the optical imaging system 10 is 11.12 mm.
[0115] In some embodiments, the optical imaging system 10 satisfies the following relationship:
[0116] 1.4 ≤ FNO ≤ 2.4;
[0117] Wherein, FNO is the aperture value of the optical imaging system 10. By reasonably configuring the aperture value of the optical imaging system 10, the optical imaging system 10 can be guaranteed to meet the requirements of a large aperture.
[0118] In some embodiments, the optical imaging system 10 satisfies the following relationship:
[0119] 0 ≤ |f2 / f3| ≤ 0.7;
[0120] Where f2 is the effective focal length of the second lens L2, and f3 is the effective focal length of the third lens L3.
[0121] In some embodiments, the optical imaging system 10 includes N lenses, and the optical imaging system 10 satisfies the following relationship:
[0122] 0≤|fN / f|≤2;
[0123] Where fN is the effective focal length of the Nth lens, and f is the effective focal length of the optical imaging system 10.
[0124] In some embodiments, the image-side surface of the fourth lens L4 is convex.
[0125] In some embodiments, among the first lens to the Nth lens, the Nth lens has the largest aperture. The Nth lens is the lens among the N lenses that is closest to the imaging plane along the optical axis. For example, an optical imaging system may include eight lenses, and the Nth lens is the eighth lens.
[0126] In some embodiments, the optical imaging system 10 further includes an infrared filter (IR), which has an object-side side and an image-side side. The infrared filter (IR) is used to filter the light used for imaging, specifically to block infrared light, preventing it from being received by the photosensitive element, thereby preventing infrared light from affecting the color and sharpness of the normal image, and thus improving the imaging quality of the optical imaging system 10. Preferably, the infrared filter (IR) is an infrared cutoff filter.
[0127] In some embodiments, the optical imaging system 10 further includes a light-transmitting protective glass (not shown), the protective glass having an object side and an image side, the protective glass being used to protect the photosensitive element.
[0128] First Embodiment
[0129] Please refer to Figure 4 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and an imaging surface IMG.
[0130] For ease of description, in the following embodiments, f1 represents the focal length of the first lens L1; f2 represents the focal length of the second lens L2; f3 represents the focal length of the third lens L3; f4 represents the focal length of the fourth lens L4; f5 represents the focal length of the fifth lens L5; f6 represents the focal length of the sixth lens L6; f7 represents the focal length of the seventh lens L7; and f represents the effective focal length of the optical imaging system 10.
[0131] Figure 4 The optical imaging system shown includes seven lenses. The first group G1 includes the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5. The second group G2 includes the sixth lens L6 and the seventh lens L7.
[0132] In this embodiment, the first lens L1 has positive optical power, the second lens has negative optical power, the object side of the second lens is convex, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, and the seventh lens has negative optical power.
[0133] The optical imaging system in this embodiment satisfies the following relationship:
[0134] ImgH / TTL = 0.726;
[0135] |f1 / f|=0.955;
[0136] |f² / f| = 2.613;
[0137] |f3 / f|=4.33;
[0138] |f4 / f|=-46.5;
[0139] |f5 / f|=1.266;
[0140] |f6 / f|=3.541;
[0141] |f7 / f|=1.469;
[0142] TTL0 / TTL = 0.727;
[0143] Table 1 shows the optical parameters of the optical imaging system 10 provided in this embodiment.
[0144] Table 1
[0145]
[0146] Table 2 shows the basic parameters of each lens in the optical imaging system 10. Where R is the radius of curvature of the optical surface, d is the lens thickness, Nd is the refractive index of the material, Vd is the Abbe number of the material, VD is the effective radius, and inf represents infinity.
[0147] Table 2
[0148]
[0149] Table 3 shows the aspherical coefficients of each lens.
[0150] Table 3
[0151]
[0152]
[0153] QBSF is an aspherical type.
[0154] In this embodiment, all aspherical surface types z of the QBSF type in the optical imaging system 10 can be defined using, but are not limited to, the following aspherical formulas:
[0155]
[0156] Where z is the aspherical elevation, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A4, A6...A30 are aspherical coefficients, corresponding to a1...a... 13 .
[0157] Figure 5 This is a defocus curve diagram of the optical imaging system 10 provided in this embodiment, such as... Figure 5 As shown in the figure, the simulation results of the image quality (100 lp / mm) under different fields of view are as follows. It can be seen from the figure that the image quality at the short focal position is greater than 0.5 in the T and S directions.
[0158] in Figure 5 The horizontal axis represents the defocus position, and the vertical axis represents the modulation.
[0159] Figure 6 This is an optical distortion diagram of the optical imaging system of this embodiment. The distortion curve in the optical distortion diagram represents the difference between the imaging deformation and the ideal shape of this embodiment. The horizontal axis is the distortion value and the vertical axis is the field of view. Figure 6 Distortion in the middle refers to distortion.
[0160] As can be seen from the figure, the optical imaging system of this embodiment has a distortion limit of 3% at the telephoto position.
[0161] Second Embodiment
[0162] Please refer to Figure 7 The optical imaging system 10 of the second embodiment includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and an imaging surface IMG.
[0163] Figure 7 The optical imaging system 10 shown includes 7 lenses. The first group G1 includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, and a fifth lens L5. The second group G2 includes a sixth lens L6 and a seventh lens L7.
[0164] In this embodiment, the first lens L1 has positive optical power, the second lens has negative optical power, the object side of the second lens is convex, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power.
[0165] The optical imaging system in this embodiment satisfies the following relationship:
[0166] ImgH / TTL = 0.863;
[0167] |f1 / f|=0.802;
[0168] |f² / f| = 2.217;
[0169] |f3 / f|=3.864;
[0170] |f4 / f|=-2.002;
[0171] |f5 / f|=0.763;
[0172] |f6 / f|=2.048;
[0173] |f7 / f|=0.230;
[0174] TTL0 / TTL = 0.68;
[0175] Table 4 shows the optical parameters of the optical imaging system 10 provided in this embodiment.
[0176] Table 4
[0177]
[0178] Table 5 shows the basic parameters of each lens in the optical imaging system 10. Where R is the radius of curvature of the optical surface, d is the lens thickness, Nd is the refractive index of the material, Vd is the Abbe number of the material, VD is the effective radius, and inf represents infinity.
[0179] Table 5
[0180]
[0181]
[0182] Table 6 shows the aspherical coefficients of each lens.
[0183] Table 6
[0184]
[0185]
[0186] QBSF is a type of aspherical surface.
[0187] In this embodiment, all aspherical surface types z of the QBSF type in the optical imaging system 10 can be defined using, but are not limited to, the following aspherical formulas:
[0188]
[0189] Where z is the aspherical elevation, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A4, A6...A30 are aspherical coefficients, corresponding to a1...a... 13 .
[0190] Figure 8 This is a defocus curve diagram of the optical imaging system 10 provided in this embodiment, such as... Figure 8 As shown in the figure, the simulation results of the image quality (100 lp / mm) under different fields of view are as follows. It can be seen from the figure that the image quality at the short focal position is greater than 0.5 in the T and S directions.
[0191] Figure 9 This is an optical distortion diagram of the optical imaging system of this embodiment. The distortion curve in the optical distortion diagram represents the difference between the imaging deformation and the ideal shape of this embodiment. The horizontal axis is the distortion value and the vertical axis is the field of view.
[0192] As can be seen from the figure, the optical imaging system of this embodiment will have distortion within the range of 3% at the telephoto position.
[0193] Third Embodiment
[0194] Please refer to Figure 10 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and an imaging surface IMG.
[0195] Figure 10 The optical imaging system shown includes seven lenses. The first group G1 includes the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5. The second group G2 includes the sixth lens L6 and the seventh lens L7.
[0196] In this embodiment, the first lens L1 has positive optical power, the second lens has negative optical power, the object side of the second lens is convex, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power.
[0197] The optical imaging system in this embodiment satisfies the following relationship:
[0198] ImgH / TTL = 0.946;
[0199] |f1 / f|=0.946;
[0200] |f² / f| = 2.746;
[0201] |f3 / f|=4.292;
[0202] |f4 / f|=-15.568;
[0203] |f5 / f|=1.136;
[0204] |f6 / f|=4.381;
[0205] |f7 / f|=0.505;
[0206] TTL0 / TTL = 0.68;
[0207] Table 7 shows the optical parameters of the optical imaging system 10 provided in this embodiment.
[0208] Table 7
[0209]
[0210] Table 8 shows the basic parameters of each lens in the optical imaging system 10. Where R is the radius of curvature of the optical surface, d is the lens thickness, Nd is the refractive index of the material, Vd is the Abbe number of the material, VD is the effective radius, and inf represents infinity.
[0211] Table 8
[0212]
[0213] Table 9 shows the aspherical coefficients of each lens.
[0214] Table 9
[0215]
[0216]
[0217] In this embodiment, all aspherical surface types z of the QBSF type in the optical imaging system 10 can be defined using, but are not limited to, the following aspherical formulas:
[0218]
[0219] Where z is the aspherical elevation, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A4, A6...A30 are aspherical coefficients, corresponding to a1...a... 13 .
[0220] Figure 11 This is a defocus curve diagram of the optical imaging system 10 provided in this embodiment, such as... Figure 11 As shown in the figure, the simulation results of the image quality (100 lp / mm) under different fields of view are as follows. It can be seen from the figure that the image quality at the short focal position is greater than 0.5 in the T and S directions.
[0221] Figure 12 This is an optical distortion diagram of the optical imaging system of this embodiment. The distortion curve in the optical distortion diagram represents the difference between the imaging deformation and the ideal shape of this embodiment. The horizontal axis is the distortion value and the vertical axis is the field of view.
[0222] As can be seen from the figure, the optical imaging system of this embodiment will have distortion within the range of 3% at the telephoto position.
[0223] Fourth embodiment
[0224] Please refer to Figure 13 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and an imaging surface IMG.
[0225] Figure 13 The optical imaging system shown includes seven lenses. The first group G1 includes the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5. The second group G2 includes the sixth lens L6 and the seventh lens L7.
[0226] In this embodiment, the first lens L1 has positive optical power, the second lens L2 has negative optical power, the object side of the second lens is convex, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, and the seventh lens has negative optical power.
[0227] The optical imaging system in this embodiment satisfies the following relationship:
[0228] ImgH / TTL = 0.726;
[0229] |f1 / f|=0.958;
[0230] |f² / f| = 2.62;
[0231] |f3 / f|=4.434;
[0232] |f4 / f|=-38.191;
[0233] |f5 / f|=1.261;
[0234] |f6 / f|=3.751;
[0235] |f7 / f|=1.383;
[0236] TTL0 / TTL = 0.768;
[0237] Table 10 shows the optical parameters of the optical imaging system 10 provided in this embodiment.
[0238] Table 10
[0239]
[0240] Table 11 shows the basic parameters of each lens in the optical imaging system 10. Where R is the radius of curvature of the optical surface, d is the lens thickness, Nd is the refractive index of the material, Vd is the Abbe number of the material, VD is the effective radius, and inf represents infinity.
[0241] Table 11
[0242]
[0243] Table 12 shows the aspherical coefficients of each lens.
[0244] Table 12
[0245]
[0246]
[0247] In this embodiment, all aspherical surface types z of the QBSF type in the optical imaging system 10 can be defined using, but are not limited to, the following aspherical formulas:
[0248]
[0249] Where z is the aspherical elevation, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A4, A6...A30 are aspherical coefficients, corresponding to a1...a... 13 .
[0250] Figure 14 This is a defocus curve diagram of the optical imaging system 10 provided in this embodiment, such as... Figure 14 As shown in the figure, the simulation results of the image quality (100 lp / mm) under different fields of view are as follows. It can be seen from the figure that the image quality at the short focal position is greater than 0.5 in the T and S directions.
[0251] Figure 15 This is an optical distortion diagram of the optical imaging system of this embodiment. The distortion curve in the optical distortion diagram represents the difference between the imaging deformation and the ideal shape of this embodiment. The horizontal axis is the distortion value and the vertical axis is the field of view.
[0252] As can be seen from the figure, the optical imaging system of this embodiment will have distortion within the range of 3% at the telephoto position.
[0253] Fifth embodiment
[0254] Please refer to Figure 16 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and an imaging surface IMG.
[0255] Figure 16 The optical imaging system shown includes seven lenses. The first group G1 includes the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5. The second group G2 includes the sixth lens L6 and the seventh lens L7.
[0256] In this embodiment, the first lens L1 has positive optical power, the second lens has negative optical power, the object side of the second lens is convex, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has negative optical power, and the seventh lens has negative optical power.
[0257] The optical imaging system in this embodiment satisfies the following relationship:
[0258] ImgH / TTL = 0.78;
[0259] |f1 / f|=0.910;
[0260] |f² / f| = 2.458;
[0261] |f3 / f|=4.03;
[0262] |f4 / f| = -20.007;
[0263] |f5 / f|=1.145;
[0264] |f6 / f|=3.654;
[0265] |f7 / f|=0.539;
[0266] TTL0 / TTL = 0.711;
[0267] Table 13 shows the optical parameters of the optical imaging system 10 provided in this embodiment.
[0268] Table 13
[0269]
[0270] Table 14 shows the basic parameters of each lens in the optical imaging system 10. Where R is the radius of curvature of the optical surface, d is the lens thickness, Nd is the refractive index of the material, Vd is the Abbe number of the material, VD is the effective radius, and inf represents infinity.
[0271] Table 14
[0272]
[0273] Table 15 shows the aspherical coefficients of each lens.
[0274] Table 15
[0275]
[0276]
[0277] In this embodiment, all aspherical surface types z of the QBSF type in the optical imaging system 10 can be defined using, but are not limited to, the following aspherical formulas:
[0278]
[0279] Where z is the aspherical elevation, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A4, A6...A30 are aspherical coefficients, corresponding to a1...a... 13 .
[0280] Figure 17 This is a defocus curve diagram of the optical imaging system 10 provided in this embodiment, such as... Figure 17 As shown in the figure, the simulation results of the image quality (100 lp / mm) under different fields of view are as follows. It can be seen from the figure that the image quality at the short focal position is greater than 0.5 in the T and S directions.
[0281] Figure 18 This is an optical distortion diagram of the optical imaging system of this embodiment. The distortion curve in the optical distortion diagram represents the difference between the imaging deformation and the ideal shape of this embodiment. The horizontal axis is the distortion value and the vertical axis is the field of view.
[0282] As can be seen from the figure, the optical imaging system of this embodiment will have distortion within the range of 3% at the telephoto position.
[0283] Sixth Embodiment
[0284] Please refer to Figure 19 The optical imaging system 10 of the first embodiment includes, from the object side to the image side, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixth lens L6, a seventh lens L7, a filter IR, and an imaging surface IMG.
[0285] Figure 19 The optical imaging system shown includes seven lenses. The first group G1 includes the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5. The second group G2 includes the sixth lens L6 and the seventh lens L7.
[0286] In this embodiment, the first lens L1 has positive optical power, the second lens has negative optical power, the object side of the second lens is convex, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, the sixth lens has positive optical power, and the seventh lens has negative optical power.
[0287] The optical imaging system in this embodiment satisfies the following relationship:
[0288] ImgH / TTL = 0.727;
[0289] |f1 / f|=1.136;
[0290] |f² / f| = 3.378;
[0291] |f3 / f|=7.68;
[0292] |f4 / f|=-2.35;
[0293] |f5 / f|=0.97;
[0294] |f6 / f|=5.6;
[0295] |f7 / f|=1.22;
[0296] TTL0 / TTL = 0.701;
[0297] Table 16 shows the optical parameters of the optical imaging system 10 provided in this embodiment.
[0298] Table 16
[0299]
[0300] Table 17 shows the basic parameters of each lens in the optical imaging system 10. Where R is the radius of curvature of the optical surface, d is the lens thickness, Nd is the refractive index of the material, Vd is the Abbe number of the material, VD is the effective radius, and inf represents infinity.
[0301] Table 17
[0302]
[0303]
[0304] Table 18 shows the aspherical coefficients of each lens.
[0305] Table 18
[0306]
[0307]
[0308] In this embodiment, all aspherical surface types z of the QBSF type in the optical imaging system 10 can be defined using, but are not limited to, the following aspherical formulas:
[0309]
[0310] Where z is the aspherical elevation, r is the radial coordinate of the aspherical surface, c is the spherical curvature at the vertex of the aspherical surface, K is the quadratic surface constant, and A4, A6...A30 are aspherical coefficients, corresponding to a1...a... 13 .
[0311] Figure 20 This is a defocus curve diagram of the optical imaging system 10 provided in this embodiment, such as... Figure 20 As shown in the figure, the simulation results of the image quality (100 lp / mm) under different fields of view are as follows. It can be seen from the figure that the image quality at the short focal position is greater than 0.5 in the T and S directions.
[0312] Figure 21 This is an optical distortion diagram of the optical imaging system of this embodiment. The distortion curve in the optical distortion diagram represents the difference between the imaging deformation and the ideal shape of this embodiment. The horizontal axis is the distortion value and the vertical axis is the field of view.
[0313] As can be seen from the figure, the optical imaging system of this embodiment will have distortion within the range of 3% at the telephoto position.
[0314] Please refer to Figure 22The camera module 100 in this embodiment includes an optical imaging system 10 and a photosensitive element 30, with the photosensitive element disposed on the image side of the optical imaging system 10.
[0315] Specifically, the photosensitive element 30 can be an image sensor, which can be a complementary metal-oxide-semiconductor (CMOS) image sensor or a charge-coupled device (CCD).
[0316] In one embodiment, the photosensitive element 30 is 1 inch in size, which can better improve the resolution of the camera module.
[0317] In one embodiment, the camera module 100 further includes a pop-up mechanism (not shown), which works in conjunction with the optical imaging system 10 to pop a first group of the optical imaging system 10 from a non-working position to a working position.
[0318] Please refer to Figure 23 The electronic device 1000 of this application embodiment includes a housing 200 and a camera module 100, the camera module 100 being mounted on the housing 200 for acquiring images.
[0319] The electronic device 1000 in this application includes, but is not limited to, imaging-enabled electronic devices such as smartphones, automotive cameras, surveillance cameras, tablet computers, laptops, e-book readers, portable multimedia players (PMPs), portable telephones, video phones, digital still cameras, mobile medical devices, and wearable devices.
[0320] It should be noted that the above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Where there is no conflict, the embodiments and features described in the embodiments of this application can be combined with each other. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An optical imaging system, characterized in that, The optical imaging system is used in conjunction with a pop-out mechanism. The optical imaging system includes a first lens to an Nth lens arranged sequentially along the optical axis from the object side to the image side. Each of the first lens to the Nth lens has an optical power, where N=7. The first lens to the Nth lens are divided into a first group and a second group from the object side to the image side. The first group has positive optical power, and the distance between the second group and the image plane in the optical axis direction is fixed. The first lens has positive optical power, the second lens has negative optical power, the third lens has negative optical power, the fourth lens has negative optical power, the fifth lens has positive optical power, and the seventh lens has negative optical power. The ejection mechanism is used to drive the first group to eject from a non-working position to a working position along the optical axis, wherein the working position and the non-working position are arranged sequentially from the object side to the image side; the optical imaging system satisfies the following relationship: 0 <ImgH / TTL≤1; Wherein, TTL is the total optical length of the optical imaging system when the first group is in the working position; ImgH is the image height corresponding to half of the maximum field of view of the optical imaging system; 0 <TTL0 / TTL<0.8; Wherein, TTL0 is the total optical length of the optical imaging system when the first group is in the non-working position.
2. The optical imaging system according to claim 1, characterized in that, The first group includes M lenses from the object side to the image side, where M=5; the second group includes 2 lenses from the object side to the image side.
3. The optical imaging system according to claim 1 or 2, characterized in that, The optical imaging system satisfies the following relationship: 1.4 ≤ FNO ≤ 2.4; Wherein, FNO is the aperture value of the optical imaging system.
4. The optical imaging system according to claim 1 or 2, characterized in that, The optical imaging system satisfies the following relationship: 0 ≤ |f2 / f3| ≤ 0.7; Where f2 is the effective focal length of the second lens and f3 is the effective focal length of the third lens.
5. The optical imaging system according to claim 1 or 2, characterized in that, The optical imaging system satisfies the following relationship: 0≤|fN / f|≤2; Where fN is the effective focal length of the Nth lens, and f is the effective focal length of the optical imaging system.
6. The optical imaging system according to claim 1 or 2, characterized in that, The image-side surface of the fourth lens is convex.
7. The optical imaging system according to claim 1 or 2, characterized in that, Of the first lens to the Nth lens, the Nth lens has the largest aperture.
8. A camera module, characterized in that, The optical imaging system and photosensitive element included in any one of claims 1 to 7, wherein the photosensitive element is located on the image side of the optical imaging system.
9. The camera module according to claim 8, characterized in that, The photosensitive element is 1 foot in size.
10. An electronic device, characterized in that, Includes the camera module as described in claim 8 or 9.
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