Camera device

Abstract

The present application discloses a camera device, which includes a first camera module and a second camera module, wherein the second camera module is an off-axis three-mirror camera module; wherein the equivalent focal length f1 of the first camera module and the equivalent focal length f2 of the second camera module satisfy: f2 / f1>20, and the equivalent focal length f2 of the second camera module satisfies: 401mm <f2<411mm。

Description

Technical Field

[0001] The present application relates to the field of optical elements, and in particular, to a camera device. Background Art

[0002] With the continuous development of miniaturized electronic devices such as smartphones, their built-in camera devices show a development trend of high resolution, large field of view, light weight and multifunctionality. The characteristics of the optical imaging lens built into the camera device are mainly reflected in large aperture, long focal length, wide field of view, high image quality, low distortion and compact structure. In order to adapt to the development of electronic devices, the market needs a camera device that integrates an optical imaging lens with advantages such as large aperture, long focal length and wide field of view. Summary of the invention

[0003] One aspect of the present application provides a camera device, which includes: a first camera module; and a second camera module, wherein the second camera module is an off-axis three-mirror camera module; wherein the equivalent focal length f1 of the first camera module and the equivalent focal length f2 of the second camera module satisfy: f2 / f1>20, and the equivalent focal length f2 of the second camera module satisfies: 401mm <f2<411mm。

[0004] In one embodiment, the first camera module includes, in order from the object side to the image side along the first optical axis: a first lens with optical power; a second lens with positive optical power, whose object side surface is convex and whose image side surface is concave; a third lens with positive optical power, whose object side surface is convex and whose image side surface is convex; a fourth lens with negative optical power, whose object side surface is concave and whose image side surface is convex; a fifth lens with optical power, whose image side surface is convex; a sixth lens with optical power; and a seventh lens with negative optical power.

[0005] In one embodiment, the light-clearing aperture of the second camera module is a rectangular aperture.

[0006] In one embodiment, the entrance pupil diameter EPD of the second camera module is 8.5 mm.

[0007] In one embodiment, a module size D of the second camera module satisfies: D≤25mm×25mm.

[0008] In one embodiment, the second camera module includes: a first reflector; a second reflector, which is arranged on the reflecting light path of the first reflector; and a third reflector, which is arranged on the reflecting light path of the second reflector; wherein the center normal of the first reflector, the center normal between the second reflectors, and the center normal of the third reflector all intersect.

[0009] In one embodiment, the second camera module further includes: an image sensor, wherein the image sensor is on the reflection light path of the third reflector, and the image sensor is located at the imaging surface of the second camera module.

[0010] In one embodiment, an aperture stop is further included, and the aperture stop is arranged at the first reflector.

[0011] In one embodiment, the reflecting surface of each of the first to third reflecting mirrors is a polynomial free-form surface.

[0012] In one embodiment, a curvature radius R1 of the reflection surface of the first reflector, a curvature radius R2 of the reflection surface of the second reflector, and a curvature radius R3 of the reflection surface of the third reflector satisfy: 100×|1 / R1+1 / R2-1 / R3|≤0.1.

[0013] In one embodiment, the distance d1 from the center of the first reflector to the center of the second reflector, the distance d2 from the center of the second reflector to the center of the third reflector, and the distance d3 from the center of the third reflector to the imaging surface of the second camera module satisfy: 17mm<(d1+d2+d3) / 3<19mm.

[0014] The camera device provided in the present application is provided with two camera modules. By reasonably setting the equivalent focal lengths of the first camera module and the second camera module, and reasonably setting the optical zoom ratio of the camera device, the camera device has a large aperture, a long focal length, a wide field of view, and good imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, purposes and advantages of the present application will become more apparent through the following detailed description of non-limiting embodiments in conjunction with the accompanying drawings. In the accompanying drawings:

[0016] Figure 1 A schematic structural diagram of a camera device according to an embodiment of the present application is shown;

[0017] Figure 2 A schematic structural diagram of a first camera module according to Embodiment 1 of the present application is shown;

[0018] FIG. 3A to FIG. 3D The axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the first camera module of Example 1 are respectively shown;

[0019] Figure 4 A schematic structural diagram of a first camera module according to Embodiment 2 of the present application is shown;

[0020] FIG. 5A to FIG. 5DThe axial chromatic aberration curve, astigmatism curve, distortion curve and magnification chromatic aberration curve of the first camera module of Example 2 are respectively shown;

[0021] Figure 6 A structural schematic diagram of a second camera module according to Example 3 of the present application is shown. DETAILED DESCRIPTION

[0022] In order to better understand the present application, a more detailed description will be made of various aspects of the present application with reference to the accompanying drawings. It should be understood that these detailed descriptions are only descriptions of exemplary embodiments of the present application, and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] It should be noted that in this specification, the expressions of first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teaching of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0024] In the drawings, the thickness, size and shape of the lenses have been slightly exaggerated for ease of explanation. Specifically, the shapes of the spherical or aspherical surfaces shown in the drawings are shown by way of example. That is, the shapes of the spherical or aspherical surfaces are not limited to the shapes of the spherical or aspherical surfaces shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0025] In this article, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closest to the object is called the object side of the lens, and the surface of each lens closest to the imaging plane is called the image side of the lens.

[0026] It should also be understood that the terms "comprises", "including", "having", "includes" and / or "comprising", when used in this specification, indicate the presence of the stated features, elements and / or components, but do not exclude the presence or addition of one or more other features, elements, components and / or combinations thereof. In addition, when expressions such as "at least one of..." appear after a list of listed features, they modify the entire listed features rather than modifying the individual elements in the list. In addition, when describing embodiments of the present application, "may" is used to mean "one or more embodiments of the present application". And, the term "exemplary" is intended to refer to an example or illustration.

[0027] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It should also be understood that terms (such as those defined in a common dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0028] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in combination with the embodiments.

[0029] The features, principles and other aspects of this application will be described in detail below.

[0030] Figure 1 A schematic structural diagram of a camera device according to an embodiment of this application is shown. As Figure 1 shown, the camera device includes: a first camera module and a second camera module, and the second camera module is an off-axis three-reflection camera module. The off-axis three-reflection camera module has the advantages of achromatism, no obscuration, large field of view, high image quality, and convenient optical path folding. In this embodiment, adopting the off-axis three-reflection camera module for the second camera module is beneficial to realizing the long focal length and wide field of view characteristics of the camera device. The first camera module and the second camera module are arranged in cooperation, which is beneficial to improving the imaging quality of the camera device.

[0031] In an exemplary embodiment, the first camera module sequentially includes, along a first optical axis from the object side to the image side: a first lens having a focal power; a second lens having a positive focal power, with a convex object surface and a concave image surface; a third lens having a positive focal power, with a convex object surface and a convex image surface; a fourth lens having a negative focal power, with a concave object surface and a convex image surface; a fifth lens having a focal power, with a convex image surface; a sixth lens having a focal power; and a seventh lens having a negative focal power.

[0032] In an exemplary embodiment, the equivalent focal length f1 of the first camera module and the equivalent focal length f2 of the second camera module satisfy: f2 / f1>20. Reasonably increasing the optical zoom ratio of the camera device is beneficial to expanding the focal regions at the wide-angle end and the telephoto end, and improving the imaging quality of the camera device for ultra-long-distance imaging.

[0033] In an exemplary embodiment, the equivalent focal length f2 of the second camera module satisfies: 401mm < f2 < 411mm. Setting the equivalent focal length of the second camera module within a reasonable focal length range to meet the above conditions is beneficial to realizing the telephoto characteristics of the camera device.

[0034] In an exemplary embodiment, the clear aperture of the second camera module is a rectangular aperture.

[0035] In an exemplary embodiment, the entrance pupil diameter EPD of the second camera module is 8.5 mm. Reasonable setting of the entrance pupil diameter of the second camera module is conducive to controlling the amount of light entering the optical system and realizing the characteristics of high pixel and large aperture of the optical system.

[0036] In an exemplary embodiment, the module size D of the second camera module satisfies: D≤25mm×25mm. Reasonable setting of the module size of the second camera module to be less than 25mm×25mm is conducive to making the camera device have the characteristics of ultra-small size while meeting the requirements of high image quality and ultra-long focal length, making the device structure more compact and miniaturized. Among them, the module size D specifically refers to the surface size exposed on the camera device carrier after the second camera module is installed in the camera device.

[0037] In an exemplary embodiment, the second camera module includes: a first reflector; a second reflector, the second reflector is arranged on the reflection light path of the first reflector; and a third reflector, the third reflector is arranged on the reflection light path of the second reflector; wherein the center normal line of the first reflector, the center normal line between the second reflectors, and the center normal line of the third reflector all intersect. Reasonable setting of the positional relationship of the above three reflectors is conducive to facilitating the folding of the light path in the camera device.

[0038] In an exemplary embodiment, the second camera module further includes: an image sensor, the image sensor is on the reflection light path of the third reflector, and the image sensor is located at the imaging surface of the second camera module.

[0039] In an exemplary embodiment, an aperture stop is further included, and the aperture stop is disposed at the first reflecting mirror.

[0040] In an exemplary embodiment, the reflecting surface of each reflector from the first reflector to the third reflector is a polynomial free-form surface. The market's increasing requirements for the imaging performance and imaging quality of camera equipment have brought huge challenges to traditional aspheric optical systems. Free-form surface optical elements have a non-rotationally symmetrical surface shape, which can maximize the degree of freedom, help improve the ability of the optical system to balance high-order and off-axis aberrations, widen the effective field of view of the optical system, and make the structural layout of the optical system more flexible. In this embodiment, the second camera module uses three reflectors to return the light path. The reflecting surfaces of the three reflectors are all polynomial free-form surfaces, which enables the optical system to meet the requirements of small size and compact structure while meeting the characteristics of ultra-long focal length and high image quality.

[0041] In an exemplary embodiment, the curvature radius R1 of the reflection surface of the first reflector, the curvature radius R2 of the reflection surface of the second reflector, and the curvature radius R3 of the reflection surface of the third reflector satisfy: 100×|1 / R1+1 / R2-1 / R3|≤0.1. Reasonably setting the relationship between the curvature radius of the reflection surface of the first reflector, the curvature radius of the reflection surface of the second reflector, and the curvature radius of the reflection surface of the third reflector so as to satisfy the above conditions is conducive to constraining the shapes of the three reflectors, and then controlling the aberration contribution rate of the three reflectors, so as to effectively balance the aberrations of the optical system related to the aperture band, thereby improving the imaging quality of the optical system.

[0042] In an exemplary embodiment, the distance d1 from the center of the first reflector to the center of the second reflector, the distance d2 from the center of the second reflector to the center of the third reflector, and the distance d3 from the center of the third reflector to the imaging surface of the second camera module satisfy: 17mm<(d1+d2+d3) / 3<19mm. Reasonable settings of the relationship between the distance from the center of the first reflector to the center of the second reflector, the distance from the center of the second reflector to the center of the third reflector, and the distance from the center of the third reflector to the imaging surface of the second camera module so that they meet the above conditions to control the distances between the three reflectors within a certain range are beneficial to the camera device having the optical characteristics of ultra-long focal length and the structural characteristics of compact system structure and ultra-small size, and are also beneficial to the processing and assembly of the camera device.

[0043] The camera device according to the present application adopts an off-axis three-mirror camera module, which has a compact structure, small size, an equivalent focal length of 406 mm, a large aperture, high image quality, etc. Its optical zoom ratio can reach more than 20 times.

[0044] An exemplary embodiment of the present application further provides an electronic device, which includes the above-described camera apparatus.

[0045] Specific embodiments of the optical imaging lens applicable to the above-mentioned embodiments are further described below with reference to the accompanying drawings.

[0046] Example 1

[0047] The following reference Figures 2 to 3D Describe the first camera module according to Example 1 of the present application. Figure 2 It is a schematic diagram showing the structure of the first camera module according to Example 1 of the present application.

[0048] like Figure 2 As shown, the first camera module includes, in order from the object side to the image side along the optical axis: a first lens E1, a second lens E2, an aperture STO, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0049] The first lens E1 has positive focal power, and its object side surface S1 is concave, and its image side surface S2 is convex. The second lens E2 has positive focal power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive focal power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative focal power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has positive focal power, and its object side surface S9 is concave, and its image side surface S10 is convex. The sixth lens E6 has negative focal power, and its object side surface S11 is convex, and its image side surface S12 is concave. The seventh lens E7 has negative focal power, and its object side surface S13 is convex, and its image side surface S14 is concave. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0050] Table 1 shows a basic parameter table of the first camera module of Example 1, wherein the units of the curvature radius, thickness / distance and focal length are all millimeters (mm).

[0051]

[0052]

[0053] Table 1

[0054] In this embodiment, the total effective focal length of the first camera module f=4.40 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=6.87 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.70 mm.

[0055] In Example 1, the object side surface and the image side surface of any lens among the first lens E1 to the seventh lens E7 are both aspherical surfaces, and the surface shape x of each aspherical lens can be defined by but not limited to the following aspherical surface formula:

[0056]

[0057] Wherein, x is the distance vector height from the vertex of the aspheric surface when the aspheric surface is at a height of h along the optical axis; c is the paraxial curvature of the aspheric surface, c=1 / R (i.e., the paraxial curvature c is the reciprocal of the curvature radius R in Table 1 above); k is the cone coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, 10 , A 12 , A 14 , A 16 , A 18 and A20 .

[0058] Face number A4 A6 A8 A10 A12 A14 A16 A18 A20 S1 1.9050E-02 2.7201E-04 -9.8131E-04 4.3070E-04 -7.4331E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S2 2.8303E-02 -1.1794E-03 -5.0756E-04 7.5537E-04 -1.7796E-04 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S3 2.7064E-03 -1.7680E-02 3.8132E-02 -5.4951E-02 4.3550E-02 -1.8077E-02 3.1657E-03 0.0000E+00 0.0000E+00 S4 3.6584E-02 -9.1771E-02 1.1953E-01 -1.2835E-01 9.7366E-02 -4.3384E-02 8.9052E-03 0.0000E+00 0.0000E+00 S5 -2.4924E-02 3.4395E-03 -4.7643E-02 9.9075E-02 -1.2016E-01 8.4775E-02 -3.1738E-02 4.9355E-03 0.0000E+00 S6 -3.8125E-02 5.8806E-03 -5.1176E-02 9.9500E-02 -1.1000E-01 7.1963E-02 -2.5573E-02 3.7982E-03 0.0000E+00 S7 -8.9961E-02 5.8110E-02 -1.5929E-01 2.5728E-01 -2.7062E-01 1.9684E-01 -9.2037E-02 2.4328E-02 -2.7134E-03 S8 -7.5962E-02 7.3692E-02 -9.0669E-02 7.0023E-02 -3.3597E-02 1.0110E-02 -1.7669E-03 1.3526E-04 2.0521E-06 S9 -8.8807E-02 1.7029E-01 -1.4507E-01 7.3092E-02 -2.2318E-02 3.6937E-03 -1.7331E-04 -3.6689E-05 4.5046E-06 S10 -2.7462E-02 4.8371E-02 -4.3015E-02 2.2157E-02 -6.4095E-03 9.1906E-04 -2.6559E-05 -7.9555E-06 6.7279E-07 S11 1.2183E-01 -8.0709E-02 2.5750E-02 -4.9618E-03 5.7384E-04 -4.2180E-05 2.5507E-06 -1.4435E-07 4.3934E-09 S12 9.5135E-02 -6.9531E-02 2.4069E-02 -5.3251E-03 7.8592E-04 -7.7085E-05 4.8209E-06 -1.7337E-07 2.7167E-09 S13 -2.7673E-02 -1.8679E-02 8.3315E-03 -1.5247E-03 1.5926E-04 -1.0180E-05 3.9441E-07 -8.5158E-09 7.8626E-11 S14 -4.0948E-02 4.6734E-03 2.2449E-05 -6.4986E-05 7.2317E-06 -3.4139E-07 4.9822E-09 1.2912E-10 -3.8108E-12

[0059] Table 2

[0060] Figure 3A The axial chromatic aberration curve of the first camera module of Example 1 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 3B The astigmatism curve of the first camera module of Example 1 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 3C The distortion curve of the first camera module of Example 1 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 3D The magnification chromatic aberration curve of the first camera module of Example 1 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 3A to FIG. 3D It can be seen that the first camera module provided in Example 1 can achieve good imaging quality.

[0061] Example 2

[0062] The following reference Figures 4 to 5D Describe the first camera module according to Example 2 of the present application. Figure 4 A schematic diagram of the structure of the first camera module according to Example 2 of the present application is shown.

[0063] like Figure 4 As shown, the first camera module includes, in order from the object side to the image side along the optical axis: an aperture STO, a first lens E1, a second lens E2, a third lens E3, a fourth lens E4, a fifth lens E5, a sixth lens E6, a seventh lens E7, a filter E8 and an imaging surface S17.

[0064] The first lens E1 has negative power, and its object side surface S1 is convex, and its image side surface S2 is concave. The second lens E2 has positive power, and its object side surface S3 is convex, and its image side surface S4 is concave. The third lens E3 has positive power, and its object side surface S5 is convex, and its image side surface S6 is convex. The fourth lens E4 has negative power, and its object side surface S7 is concave, and its image side surface S8 is convex. The fifth lens E5 has negative power, and its object side surface S9 is convex, and its image side surface S10 is convex. The sixth lens E6 has positive power, and its object side surface S11 is concave, and its image side surface S12 is convex. The seventh lens E7 has negative power, and its object side surface S13 is concave, and its image side surface S14 is convex. The filter E8 has an object side surface S15 and an image side surface S16. The light from the object passes through each surface S1 to S16 in sequence and is finally imaged on the imaging surface S17.

[0065] In this embodiment, the total effective focal length of the first camera module f=3.49 mm, the distance TTL from the object side surface S1 of the first lens E1 to the imaging surface S17 on the optical axis=8.40 mm, and half of the diagonal length of the effective pixel area on the imaging surface S17 ImgH=4.00 mm.

[0066] Table 3 shows a basic parameter table of the first camera module of Example 2, wherein the units of the curvature radius, thickness / distance and focal length are all millimeters (mm).

[0067]

[0068] Table 3

[0069] In Example 2, the object side surface and the image side surface of any lens from the first lens E1 to the seventh lens E7 are aspherical surfaces. The following Tables 4-1 and 4-2 list the high-order coefficients A4, A6, A8, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A53, A54, A55, A56, 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 22 , A 24 , A 26 , A 28 and A 30 .

[0070] Face number A4 A6 A8 A10 A12 A14 A16 S1 -2.6814E-01 -1.0752E-01 3.2206E-02 -2.3568E-02 5.0175E-04 1.6683E-03 -1.8986E-03 S2 -8.5673E-01 1.7221E-03 -8.0437E-02 -2.8426E-03 -1.6371E-02 -3.7299E-04 -3.1485E-03 S3 -4.4235E-02 -3.6236E-02 5.8673E-03 1.5246E-03 5.9492E-04 -3.8658E-04 -8.2181E-05 S4 -6.7395E-03 3.0630E-02 -2.2317E-02 8.7022E-03 -2.3995E-03 3.6389E-04 -1.7406E-04 S5 2.5612E-02 -1.7995E-02 7.1939E-03 -2.8332E-03 9.9992E-04 -2.9205E-04 4.9631E-05 S6 1.1946E-01 -2.8693E-02 2.3852E-02 -9.7993E-03 4.5305E-03 -1.3900E-03 3.2803E-04 S7 1.0267E-01 9.2995E-02 -7.6032E-03 3.2625E-03 3.0226E-04 7.0557E-04 -8.3791E-04 S8 -4.6882E-02 1.3585E-01 -2.3221E-02 1.0411E-02 8.7203E-04 -3.1439E-04 -4.6633E-05 S9 3.0221E-01 -3.4485E-01 1.7846E-01 -7.4016E-02 2.8757E-02 -1.1063E-02 5.6324E-03 S10 2.8087E-03 -2.0533E-01 3.4350E-01 1.3620E-01 -4.9014E-02 3.3952E-04 1.2303E-02 S11 1.1689E+00 6.8997E-01 -3.8496E-01 7.5093E-02 7.8220E-02 -5.3261E-02 2.4763E-02 S12 5.7175E-01 -1.5912E-02 -2.3083E-01 6.4630E-02 -1.6080E-01 -6.0984E-02 -1.1698E-02 S13 -5.6738E-01 1.0288E-01 2.9204E-01 4.0081E-01 3.5220E-01 5.3871E-02 -5.5655E-02 S14 1.5684E+00 8.2811E-01 1.7512E-01 3.0571E-01 3.2908E-01 -1.1019E-02 8.3132E-02

[0071] Table 4-1

[0072] Face number A18 A20 A22 A24 A26 A28 A30 S1 5.4650E-04 -6.5455E-05 -4.6624E-06 2.5341E-07 0.0000E+00 0.0000E+00 0.0000E+00 S2 -7.8640E-05 -6.1467E-04 6.8682E-06 -3.1071E-07 0.0000E+00 0.0000E+00 0.0000E+00 S3 6.9910E-06 3.4483E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S4 8.5224E-05 -5.2070E-05 1.1723E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S5 5.1687E-06 -1.4925E-05 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S6 -7.8163E-05 1.1328E-05 8.2744E-07 -1.1189E-07 0.0000E+00 0.0000E+00 0.0000E+00 S7 3.7219E-04 -3.6688E-05 2.3183E-07 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S8 7.8973E-05 5.2803E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S9 -1.5235E-03 8.6312E-04 1.8142E-06 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 S10 4.1278E-03 -4.4582E-03 1.1027E-04 -9.6542E-06 0.0000E+00 0.0000E+00 0.0000E+00 S11 2.2256E-03 -8.2457E-03 6.9737E-03 -3.4953E-03 7.5514E-04 6.7114E-08 0.0000E+00 S12 -1.8692E-02 -6.2488E-04 -4.1981E-03 1.1455E-03 5.8921E-04 -3.9008E-07 1.0125E-07 S13 -3.9157E-02 -1.8901E-02 -1.3886E-02 -6.5433E-03 -1.4971E-03 -2.9297E-06 0.0000E+00 S14 1.6924E-02 -9.9340E-04 1.5116E-02 -3.4394E-03 2.8377E-03 -8.4166E-06 7.0375E-08

[0073] Table 4-2

[0074] Figure 5A The axial chromatic aberration curve of the first camera module of Example 2 is shown, which indicates that light of different wavelengths deviates from the focal point behind the lens. Figure 5B The astigmatism curve of the first camera module of Example 2 is shown, which represents the meridional image plane curvature and the sagittal image plane curvature. Figure 5C The distortion curve of the first camera module of Example 2 is shown, which represents the distortion magnitude values ​​corresponding to different image heights. Figure 5D The magnification chromatic aberration curve of the first camera module of Example 2 is shown, which represents the deviation of different image heights on the imaging surface after the light passes through the lens. FIG. 5A to FIG. 5D It can be seen that the first camera module provided in Example 2 can achieve good imaging quality.

[0075] Example 3

[0076] Figure 6 FIG. 2 shows a schematic diagram of the structure of the second camera module according to an embodiment of the present application. Figure 6 As shown, the second camera module includes a first reflector, a second reflector and a third reflector.

[0077] Table 5 shows a basic parameter table of the second camera module of the embodiment, wherein the units of the curvature radius and the spacing are both millimeters (mm).

[0078] Mirror Curvature radius (mm) Spacing(mm) First reflector 516.919 18.3054 Second reflector 462.8957 -17.3559 The third reflector 274.264 17.2310

[0079] Table 5

[0080] In Example 3, the reflective surface of any lens from the first reflector to the third reflector is a polynomial free-form surface, and the surface shape z of each reflector can be defined by, but not limited to, the following free-form surface formula:

[0081]

[0082] Wherein, z is the surface vector height of the free-form surface at (x, y); c is the surface vector height; k is the quadratic surface coefficient; Ai is the coefficient of the i-th term of the free-form surface. Table 6 below lists the high-order coefficients A2, A3, A5, A7, A9, A10, A11, A12, A13, A14, A15, A16, A17, A18, A19, A20, A21, A22, A23, A24, A25, A26, A27, A28, A29, A30, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, A41, A42, A43, A44, A45, A46, A47, A48, A49, A50, A51, A52, A5 10 , A 12 , A 14 , A 16 , A 18 , A 20 , A 21 , A 23 , A 25 , A 27 , A 29 , A 31 , A 33 and A 35 .

[0083] Face number First reflector Second reflector The third reflector Conic 0 0 0 A2 0.089600019 0.119386772 -0.869316942 A3 -0.003646736 0.002521435 -0.001516475 A5 -0.001087685 0.006712899 0.013053386 A7 1.2154E-05 2.57827E-05 0.000142666 A9 3.70324E-06 -2.97325E-05 -0.000646299 A10 1.06422E-06 2.75124E-06 9.98773E-06 A12 3.00643E-06 5.44257E-06 5.27422E-05 A14 1.74917E-06 2.82511E-06 7.21893E-05 A16 1.09838E-08 -2.97813E-08 -1.60345E-07 A18 4.27895E-08 -4.52594E-08 -8.76074E-07 A20 1.67203E-08 -6.46964E-09 -3.32375E-06 A21 -6.38452E-10 -5.79454E-10 -2.44871E-08 A23 1.37858E-08 1.1219E-08 1.80159E-07 A25 1.52653E-08 3.12358E-09 2.41813E-07 A27 6.56265E-09 2.27602E-09 5.76627E-07 A29 1.47575E-09 3.36256E-09 7.24949E-08 A31 8.56437E-10 1.17149E-09 1.253E-08 A33 9.29792E-12 1.45006E-09 -1.44111E-07 A35 8.29675E-11 2.69993E-10 -6.84834E-08

[0084] Table 6

[0085] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A camera device, characterized in that: include: The first camera module; as well as A second camera module, wherein the second camera module is an off-axis three-mirror camera module; Among them, the equivalent focal length f1 of the first camera module and the equivalent focal length f2 of the second camera module satisfy: f2 / f1>20, and the equivalent focal length f2 of the second camera module satisfies: 401 mm <f2<411 mm; The first camera module includes, in sequence from the object side to the image side along the first optical axis: a first lens having optical power; The second lens has positive refractive power, and its object side surface is convex and its image side surface is concave; The third lens has positive power, and its object side surface is convex and its image side surface is convex; a fourth lens element having negative optical power, whose object side surface is concave and image side surface is convex; a fifth lens having optical power and having an image side surface which is convex; a sixth lens having optical power; and a seventh lens having negative optical power; The number of lenses having optical power in the first camera module is seven; The second camera module comprises: first reflector; a second reflecting mirror, the second reflecting mirror being arranged on a reflecting light path of the first reflecting mirror; and A third reflector, the third reflector is arranged on the reflection light path of the second reflector; wherein the center normal line of the first reflector, the center normal line between the second reflectors and the center normal line of the third reflector all intersect; A distance d1 from the center of the first reflector to the center of the second reflector, a distance d2 from the center of the second reflector to the center of the third reflector, and a distance d3 from the center of the third reflector to the imaging surface of the second camera module satisfy: 17 mm<(d1+d2+d3) / 3<19 mm; A curvature radius R1 of the reflection surface of the first reflection mirror, a curvature radius R2 of the reflection surface of the second reflection mirror, and a curvature radius R3 of the reflection surface of the third reflection mirror satisfy: 100×|1 / R1+1 / R2-1 / R3|≤0.

1.

2. The camera device according to claim 1, characterized in that The light-transmitting aperture of the second camera module is a rectangular aperture.

3. The imaging device according to claim 1, wherein: The entrance pupil diameter EPD of the second camera module is 8.5 mm.

4. The imaging device according to claim 1, wherein: The module size D of the second camera module satisfies: D≤25mm×25mm.

5. The imaging device according to claim 1, wherein: The second camera module also includes: an image sensor, which is on the reflection light path of the third reflector, and the image sensor is located at the imaging surface of the second camera module.

6. The imaging device according to claim 1, wherein: It also includes an aperture stop, which is arranged at the first reflector.

7. The imaging device according to claim 1, wherein: The reflecting surface of each reflecting mirror from the first reflecting mirror to the third reflecting mirror is a polynomial free-form surface.

Images