An optical system suitable for large target surface high pixel panoramic imaging and a camera module using the same

Abstract

The application discloses an optical system suitable for large-target high-pixel panoramic imaging and a camera module applying the same. The optical system comprises, in sequence from an object plane to an image plane along an optical axis, a first lens, a second lens, a third lens, a fourth lens, a fifth reflecting element, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens. The fifth reflecting element is used for reflecting a light beam passing through the fourth lens to the sixth lens. The third lens and the fourth lens are combined to form a first combined lens. The eighth lens and the ninth lens are combined to form a second combined lens. The camera module comprises an optical lens, and the optical lens is internally provided with the optical system.

Description

Technical Field

[0001] This invention relates to the field of optical imaging, and more particularly to an optical system adapted for large-area, high-pixel panoramic imaging and a camera module using the same. Background Technology

[0002] With the rapid development of fields such as action cameras and panoramic image acquisition, the market has placed higher demands on the field of view, resolution, and image detail of lens imaging.

[0003] While existing wide-angle lenses can meet the basic panoramic shooting needs, they have significant limitations in terms of imaging plane size and pixel resolution, making it difficult to adapt to large-size image sensors to achieve high-resolution imaging. Moreover, existing wide-angle lenses exhibit significant image quality degradation in the edge areas of the image under wide field-of-view conditions, failing to fully unleash the high-pixel performance of large-size sensors.

[0004] Therefore, how to overcome the shortcomings of existing wide-angle lenses, while maintaining the characteristics of a large field of view, further improve the imaging surface adaptation capability and pixel load capacity, and achieve simultaneous improvement in field of view expansion and full-screen imaging clarity has become an important issue that needs to be addressed by those skilled in the art. Summary of the Invention

[0005] This invention overcomes the shortcomings of the above-mentioned technologies and provides an optical system adapted to large target surface high pixel panoramic imaging and a camera module using it.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An optical system adapted for high-pixel panoramic imaging of large target surfaces includes, along the optical axis from the object plane to the image plane, a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth reflective element (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), a ninth lens (9), and a tenth lens (10). The first lens (1) has a negative optical power and is provided with a convex first object-side surface S1 and a concave first image-side surface S2. The second lens (2) has a negative optical power and is provided with a convex second object-side surface S3 and a concave second image-side surface S4. The third lens (3) has a positive optical power and is provided with a convex third object-side surface S5 and a concave third image-side surface S6. The fourth lens (4) has a positive optical power and is provided with a convex fourth object-side surface S7 and a convex fourth image-side surface S8. The fifth reflective element (5) The lens (6) is used to reflect the light beam that has passed through the fourth lens (4) to the sixth lens (6). The sixth lens (6) has a positive optical power and is provided with a sixth object side surface S11 and a sixth image side surface S12, both of which are convex. The seventh lens (7) has a positive optical power and is provided with a seventh object side surface S13 and a seventh image side surface S14, both of which are convex. The eighth lens (8) has a positive optical power and is provided with an eighth object side surface S15 and an eighth image side surface S16, both of which are convex. The ninth lens (9) has a negative optical power and is provided with a ninth object side surface S17 and a ninth image side surface S18, both of which are concave. The tenth lens (10) has a positive optical power and is provided with a tenth object side surface S19, which is convex, and a tenth image side surface S20, which is concave. The third lens (3) and the fourth lens (4) are combined to form a first combined lens. The eighth lens (8) and the ninth lens (9) are combined to form a second combined lens.

[0008] Preferably, the focal length of the first lens (1) is f1 and -13.5mm < f1 < -11.5mm.

[0009] Preferably, the focal length of the second lens (2) is f2 and -9mm < f2 < -7mm.

[0010] Preferably, the focal length of the third lens (3) is f3 and 28mm < f3 < 32mm.

[0011] Preferably, the focal length of the fourth lens (4) is f4 and 19mm < f4 < 21mm.

[0012] Preferably, the focal length of the first combined lens is f34 and 17mm < f34 < 20mm.

[0013] Preferably, the focal length of the sixth lens (6) is f6 and 8mm < f6 < 10mm.

[0014] Preferably, the focal length of the seventh lens (7) is f7 and 15mm < f7 < 18mm.

[0015] Preferably, the focal length of the eighth lens (8) is f8 and 13mm < f8 < 15mm.

[0016] Preferably, the focal length of the ninth lens (9) is f9 and -6mm < f9 < -4mm.

[0017] Preferably, the focal length of the second combined lens is f89 and -10mm < f89 < 17mm.

[0018] Preferably, the focal length of the tenth lens (10) is f10 and 16mm < f10 < 18mm.

[0019] Preferably, the focal length of the first lens (1) is f1 and -4.5 < f1 / f < -3.5.

[0020] Preferably, the focal length of the second lens (2) is f2 and -3 < f2 / f < -2.5.

[0021] Preferably, the focal length of the third lens (3) is f3 and 9 < f3 / f < 11.

[0022] Preferably, the focal length of the fourth lens (4) is f4 and 6 < f4 / f < 7.

[0023] Preferably, the focal length of the first combined lens is f34 and 5.5 < f34 / f < 7.

[0024] Preferably, the focal length of the sixth lens (6) is f6 and 2.5 < f6 / f < 3.5.

[0025] Preferably, the focal length of the seventh lens (7) is f7 and 5 < f7 / f < 6.

[0026] Preferably, the focal length of the eighth lens (8) is f8 and 4 < f8 / f < 5.

[0027] Preferably, the focal length of the ninth lens (9) is f9 and -2 < f9 / f < -1.

[0028] Preferably, the focal length of the second combined lens is f89 and -3.5 < f89 / f < 6.

[0029] Preferably, the focal length of the tenth lens (10) is f10 and 5 < f10 / f < 6.

[0030] Preferably, the focal length of the optical system is f, the axial distance from the first object side surface S1 of the first lens (1) to the imaging surface of the optical system is TTL, half the diagonal length of the effective pixel area on the imaging surface of the optical system is ImgH, and 0.2 < (f × ImgH) / TTL < 0.50.

[0031] Preferably, the first lens (1) has a refractive index of Nd1 and an Abbe number of Vd1, and 1.50 < Nd1 < 2.00 and 30.00 < Vd1 < 45.00;

[0032] Preferably, the refractive index of the second lens (2) is Nd2, the Abbe number is Vd2, and 1.50 < Nd2 < 2.00, 40.00 < Vd2 < 60.00.

[0033] Preferably, the refractive index of the third lens (3) is Nd3, the Abbe number is Vd3, and 1.20 < Nd3 < 2.00, 30.00 < Vd3 < 95.00.

[0034] Preferably, the fourth lens (4) has a refractive index of Nd4 and an Abbe number of Vd4, and 1.50 < Nd4 < 2.00 and 30.00 < Vd4 < 40.00.

[0035] Preferably, the refractive index of the fifth reflective element (5) is Nd5, the Abbe number is Vd5, and 1.70 < Nd5 < 2.30, 20.00 < Vd5 < 30.00.

[0036] Preferably, the refractive index of the sixth lens (6) is Nd6, the Abbe number is Vd6, and 1.20 < Nd6 < 2.00, 60.00 < Vd6 < 90.00.

[0037] Preferably, the refractive index of the seventh lens (7) is Nd7, the Abbe number is Vd7, and 1.20 < Nd7 < 2.00, 60.00 < Vd7 < 100.00.

[0038] Preferably, the refractive index of the eighth lens (8) is Nd8, the Abbe number is Vd8, and 1.50 < Nd8 < 2.00, 40.00 < Vd8 < 90.00.

[0039] Preferably, the refractive index of the ninth lens (9) is Nd9, the Abbe number is Vd9, and 1.70 < Nd9 < 2.30, 20.00 < Vd9 < 50.00.

[0040] Preferably, the tenth lens (10) has a refractive index of Nd10 and an Abbe number of Vd10, and 1.30 < Nd10 < 1.60 and 70.00 < Vd10 < 100.00.

[0041] Preferably, the full field of view of the optical system is between 180° and 220°.

[0042] Preferably, the aperture Fno of the optical system has a value range of 1.9 ≤ Fno ≤ 2.2.

[0043] Preferably, the first combined lens is a cemented lens.

[0044] Preferably, the second combined lens is a cemented lens.

[0045] Preferably, the first lens (1), the third lens (3), the fourth lens (4), the eighth lens (8) and the ninth lens (9) are all spherical lenses, and the second lens (2), the sixth lens (6), the seventh lens (7) and the tenth lens (10) are all aspherical lenses.

[0046] Preferably, the optical system further includes an aperture stop STO (11) disposed between the sixth lens (6) and the seventh lens (7).

[0047] A camera module includes an optical lens, wherein the optical system described above is installed within the optical lens.

[0048] Compared with the prior art, the beneficial effects of the present invention are:

[0049] The optical system of this invention includes nine lenses and one reflective element. The first two lenses are negative power lenses, which can effectively expand the field of view. The subsequent positive power lens is responsible for converging the light beam and correcting aberrations. At the same time, the third lens (3) and the fourth lens (4) are combined to form the first combined lens, and the eighth lens (8) and the ninth lens (9) are combined to form the second combined lens. With the help of the two combined lenses, the chromatic aberration of the optical system can be corrected more effectively. Thus, by configuring the power and surface shape of each lens, the optical system of this invention can have both an ultra-wide-angle panoramic field of view and excellent image quality. It can be well adapted to large-area, high-pixel image sensors, thereby improving the overall resolution of the image and the clarity of the edge areas. In addition, a fifth reflective element (5) is provided between the fourth lens (4) and the sixth lens (6) to bend the light path. This can significantly reduce the size of the optical system of this invention, making the structure of the optical system more compact and better adapted to action cameras and panoramic cameras. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of the first embodiment of the optical system in this case.

[0051] Figure 2 These are the field curvature and distortion curves of the optical system embodiment 1 in this case.

[0052] Figure 3 This is a schematic diagram of the structure of the second embodiment of the optical system in this case.

[0053] Figure 4 These are the field curvature and distortion curves of the optical system in Embodiment 2 of this case.

[0054] Figure 5 This is a schematic diagram of the structure of the optical system in embodiment three of this case.

[0055] Figure 6 These are the field curvature and distortion curves of the optical system in Embodiment 3 of this case. Detailed Implementation

[0056] The following examples further illustrate the features and other related characteristics of the present invention in detail, to facilitate understanding by those skilled in the art:

[0057] like Figures 1 to 6 As shown, an optical system adapted for high-pixel panoramic imaging of large target surfaces includes, along the optical axis from the object plane to the image plane, a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth reflective element (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), a ninth lens (9), and a tenth lens (10). The first lens (1) has a negative optical power and is provided with a convex first object surface S1 and a concave first image surface S2. The second lens (2) has a negative optical power and is provided with a convex second object surface S3 and a concave second image surface S4. The third lens (3) has a positive optical power and is provided with a convex third object surface S5 and a concave third image surface S6. The fourth lens (4) has a positive optical power and is provided with a convex fourth object surface S7 and a convex fourth image surface S8. The fifth reflective element (5) 5) Used to reflect the light beam passing through the fourth lens (4) to the sixth lens (6), the sixth lens (6) has a positive optical power and is provided with a sixth object side surface S11 and a sixth image side surface S12, both of which are convex surfaces; the seventh lens (7) has a positive optical power and is provided with a seventh object side surface S13 and a seventh image side surface S14, both of which are convex surfaces; the eighth lens (8) has a positive optical power and is provided with an eighth object side surface S15 and an eighth image side surface S16, both of which are convex surfaces; the ninth lens (9) has a negative optical power and is provided with a ninth object side surface S17 and a ninth image side surface S18, both of which are concave surfaces; the tenth lens (10) has a positive optical power and is provided with a tenth object side surface S19, which is convex, and a tenth image side surface S20, which is concave; the third lens (3) and the fourth lens (4) are combined to form a first combined lens; the eighth lens (8) and the ninth lens (9) are combined to form a second combined lens.

[0058] As described above, the optical system of this invention includes nine lenses and one reflective element. The first two lenses are negative power lenses, which can effectively expand the field of view. The subsequent positive power lenses are responsible for converging the light beam and correcting aberrations. At the same time, the third lens (3) and the fourth lens (4) are combined to form the first combined lens, and the eighth lens (8) and the ninth lens (9) are combined to form the second combined lens. With the help of the two combined lenses, the chromatic aberration of the optical system can be corrected more effectively. Thus, by configuring the power and surface shape of each lens, the optical system of this invention can have both an ultra-wide-angle panoramic field of view and excellent imaging quality. It can be well adapted to large-area, high-pixel image sensors, thereby improving the overall resolution of the image and the clarity of the edge areas. In addition, a fifth reflective element (5) is provided between the fourth lens (4) and the sixth lens (6) to bend the light path. This can significantly reduce the size of the optical system of this invention, making the structure of the optical system more compact and better adapted to action cameras and panoramic cameras.

[0059] Specifically, the optical system in this case uses the fifth reflective element (5) as the optical path boundary. The optical axis of the front group lens where the fourth lens (4) is located and the optical axis of the rear group lens where the sixth lens (6) is located are set at a preset angle. The fifth reflective element (5) is set between the fourth image side surface S8 and the sixth object side surface S11, and is used to reflect the light beam emitted from the fourth image side surface S8 to the sixth object side surface S11 to realize the bending and turning of the optical path.

[0060] Preferably, the focal length of the first lens (1) is f1 and -13.5mm < f1 < -11.5mm.

[0061] Preferably, the focal length of the second lens (2) is f2 and -9mm < f2 < -7mm.

[0062] Preferably, the focal length of the third lens (3) is f3 and 28mm < f3 < 32mm.

[0063] Preferably, the focal length of the fourth lens (4) is f4 and 19mm < f4 < 21mm.

[0064] Preferably, the focal length of the first combined lens is f34 and 17mm < f34 < 20mm.

[0065] Preferably, the focal length of the sixth lens (6) is f6 and 8mm < f6 < 10mm.

[0066] Preferably, the focal length of the seventh lens (7) is f7 and 15mm < f7 < 18mm.

[0067] Preferably, the focal length of the eighth lens (8) is f8 and 13mm < f8 < 15mm.

[0068] Preferably, the focal length of the ninth lens (9) is f9 and -6mm < f9 < -4mm.

[0069] Preferably, the focal length of the second combined lens is f89 and -10mm < f89 < 17mm.

[0070] Preferably, the focal length of the tenth lens (10) is f10 and 16mm < f10 < 18mm.

[0071] As mentioned above, the optical system in this case, through precise design of the focal length range of each lens, allows the refraction angle of light on the surface of each lens to be in the optimal range for the entire optical system. Ultimately, this coordinated design ensures that the optical system achieves more stable imaging under conditions of large field of view and large imaging surface, thereby fully releasing the performance of the large-area, high-pixel sensor.

[0072] Specifically, the focal length of the optical system is f.

[0073] Preferably, the focal length of the first lens (1) is f1 and -4.5 < f1 / f < -3.5.

[0074] Preferably, the focal length of the second lens (2) is f2 and -3 < f2 / f < -2.5.

[0075] Preferably, the focal length of the third lens (3) is f3 and 9 < f3 / f < 11.

[0076] Preferably, the focal length of the fourth lens (4) is f4 and 6 < f4 / f < 7.

[0077] Preferably, the focal length of the first combined lens is f34 and 5.5 < f34 / f < 7.

[0078] Preferably, the focal length of the sixth lens (6) is f6 and 2.5 < f6 / f < 3.5.

[0079] Preferably, the focal length of the seventh lens (7) is f7 and 5 < f7 / f < 6.

[0080] Preferably, the focal length of the eighth lens (8) is f8 and 4 < f8 / f < 5.

[0081] Preferably, the focal length of the ninth lens (9) is f9 and -2 < f9 / f < -1.

[0082] Preferably, the focal length of the second combined lens is f89 and -3.5 < f89 / f < 6.

[0083] Preferably, the focal length of the tenth lens (10) is f10 and 5 < f10 / f < 6.

[0084] As described above, by controlling the ratio of the focal length of each lens to the focal length of the entire optical system, this invention can optimize the optical power distribution ratio within the system. This allows for control of the light deflection amplitude while ensuring the ultra-wide-angle field of view characteristics, thereby reducing the tolerance sensitivity of the optical system and improving its aberrations, ultimately achieving higher imaging quality.

[0085] Preferably, the focal length of the optical system is f, the axial distance from the first object side surface S1 of the first lens (1) to the imaging surface of the optical system is TTL, half the diagonal length of the effective pixel area on the imaging surface of the optical system is ImgH, and 0.2 < (f × ImgH) / TTL < 0.50.

[0086] As mentioned above, the value of (f×ImgH) / TTL reflects the optical system's performance in terms of field of view and thinness. By limiting this value to between 0.2 and 0.5, this invention ensures that the optical system can meet the requirements of miniaturization and thinness while maintaining a wide field of view. This avoids excessively improving the thinness of the optical system, which could limit its performance improvement, or insufficient thinness, which could hinder miniaturization design.

[0087] Preferably, the first lens (1) has a refractive index of Nd1 and an Abbe number of Vd1, and 1.50 < Nd1 < 2.00 and 30.00 < Vd1 < 45.00;

[0088] Preferably, the refractive index of the second lens (2) is Nd2, the Abbe number is Vd2, and 1.50 < Nd2 < 2.00, 40.00 < Vd2 < 60.00.

[0089] Preferably, the refractive index of the third lens (3) is Nd3, the Abbe number is Vd3, and 1.20 < Nd3 < 2.00, 30.00 < Vd3 < 95.00.

[0090] Preferably, the fourth lens (4) has a refractive index of Nd4 and an Abbe number of Vd4, and 1.50 < Nd4 < 2.00 and 30.00 < Vd4 < 40.00.

[0091] Preferably, the refractive index of the fifth reflective element (5) is Nd5, the Abbe number is Vd5, and 1.70 < Nd5 < 2.30, 20.00 < Vd5 < 30.00.

[0092] Preferably, the refractive index of the sixth lens (6) is Nd6, the Abbe number is Vd6, and 1.20 < Nd6 < 2.00, 60.00 < Vd6 < 90.00.

[0093] Preferably, the refractive index of the seventh lens (7) is Nd7, the Abbe number is Vd7, and 1.20 < Nd7 < 2.00, 60.00 < Vd7 < 100.00.

[0094] Preferably, the refractive index of the eighth lens (8) is Nd8, the Abbe number is Vd8, and 1.50 < Nd8 < 2.00, 40.00 < Vd8 < 90.00.

[0095] Preferably, the refractive index of the ninth lens (9) is Nd9, the Abbe number is Vd9, and 1.70 < Nd9 < 2.30, 20.00 < Vd9 < 50.00.

[0096] Preferably, the tenth lens (10) has a refractive index of Nd10 and an Abbe number of Vd10, and 1.30 < Nd10 < 1.60 and 70.00 < Vd10 < 100.00.

[0097] As mentioned above, by controlling and matching the refractive index and Abbe number of each lens and reflective element, aberrations can be effectively reduced and the imaging quality can be improved in high-pixel imaging.

[0098] Preferably, the optical system has a full field of view between 180° and 220°, which allows the optical system to achieve ultra-wide panoramic field of view coverage, fully meeting the large field of view shooting needs of scenarios such as action cameras and panoramic image acquisition. Combined with the aberration correction of the optical system in this case, it can ensure that the image quality does not significantly degrade under a large field of view.

[0099] Preferably, the aperture Fno of the optical system has a value range of 1.9 ≤ Fno ≤ 2.2. By controlling the aperture range of the optical system, the amount of light entering the system can be guaranteed, ensuring image brightness and detail in low-light environments and reducing image noise in low-light conditions. Combined with a large-area, high-pixel sensor, this effectively improves image quality and meets the needs of wide-field-of-view shooting in complex lighting environments.

[0100] Preferably, the first composite lens is a cemented lens, which can increase the difference between the refractive index and the Abbe number of the composite lens, thereby reducing chromatic aberration.

[0101] Preferably, the second composite lens is a cemented lens, which increases the difference between the refractive index and the Abbe number of the composite lens, thereby reducing chromatic aberration.

[0102] Preferably, the first lens (1), the third lens (3), the fourth lens (4), the eighth lens (8) and the ninth lens (9) are all spherical lenses, and the second lens (2), the sixth lens (6), the seventh lens (7) and the tenth lens (10) are all aspherical lenses. In this way, by controlling the number and position of spherical lenses and aspherical lenses, the aberration correction effect can be optimized by using aspherical lenses, the performance consistency under different temperatures can be improved, and the processing cost and assembly difficulty can be effectively controlled, thereby taking into account both imaging quality and mass production economy.

[0103] Preferably, the optical system further includes an aperture stop STO (11) disposed between the sixth lens (6) and the seventh lens (7), thereby effectively improving the aberrations of the optical system.

[0104] Specifically, the optical system also includes a filter (12) disposed behind the tenth lens (10) along the optical axis. The filter (12) has an eleventh object side surface S21 and an eleventh image side surface S22. Behind the filter (12) is the imaging surface IMA (13). The fifth reflective element (5) has a fifth object side surface S9 and a fifth image side surface S10.

[0105] Figure 1 The following is an embodiment of the optical system of this case, wherein the focal length of the first lens (1) is f1=-11.71mm, the focal length of the second lens (2) is f2=-8.11mm, the focal length of the third lens (3) is f3=30.57mm, the focal length of the fourth lens (4) is f4=19.77mm, the focal length of the first combined lens is f34=18.66mm, the focal length of the sixth lens (6) is f6=8.97mm, the focal length of the seventh lens (7) is f7=16.33mm, the focal length of the eighth lens (8) is f8=13.53mm, the focal length of the ninth lens (9) is f9=-4.72mm, the focal length of the second combined lens is f89=16.73mm, the focal length of the tenth lens (10) is f10=16.73mm, and the focal length of the entire optical system is f=2.96mm.

[0106] The surface type, radius of curvature, thickness, refractive index, and Abbe number of each lens in Example 1 are shown in Table 1 below:

[0107] Table 1. Basic parameters of each lens in Embodiment 1 of the optical system of this case.

[0108]

[0109] Specifically, in Embodiment 1 of the optical system in this case, the object-side and image-side surfaces of the second lens (2), the sixth lens (6), the seventh lens (7), and the tenth lens (10) are all aspherical surfaces. The surface shape of the aspherical surfaces of each lens can be defined using, but is not limited to, the following aspherical formula:

[0110]

[0111] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. The conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface in Example 1 are shown in Table 2 below:

[0112] Table 2: Relevant values ​​for each aspherical surface in Embodiment 1 of the optical system in this case

[0113]

[0114] Figure 2 The diagram shown is the field curvature and distortion curve of the optical system in Embodiment 1 of this case. Figure 2 It can be seen that the first embodiment of the optical system in this case can achieve good imaging quality and has high imaging quality.

[0115] Figure 3 The following is an embodiment of the optical system of this case, wherein the focal length of the first lens (1) is f1=-12.28mm, the focal length of the second lens (2) is f2=-8.08mm, the focal length of the third lens (3) is f3=31.49mm, the focal length of the fourth lens (4) is f4=20.29mm, the focal length of the first combined lens is f34=19.05mm, the focal length of the sixth lens (6) is f6=8.98mm, the focal length of the seventh lens (7) is f7=16.33mm, the focal length of the eighth lens (8) is f8=13.45mm, the focal length of the ninth lens (9) is f9=-4.74mm, the focal length of the second combined lens is f89=-9.26mm, the focal length of the tenth lens (10) is f10=17.01mm, and the focal length of the entire optical system is f=2.95mm.

[0116] The surface type, radius of curvature, thickness, refractive index, and Abbe number of each lens in Example 2 are shown in Table 3 below:

[0117] Table 3. Basic parameters of each lens in Embodiment 2 of the optical system in this case.

[0118]

[0119] Specifically, in Embodiment 2 of the optical system in this case, the object-side and image-side surfaces of the second lens (2), the sixth lens (6), the seventh lens (7), and the tenth lens (10) are all aspherical surfaces. The surface shape of the aspherical surfaces of each lens can be defined using, but is not limited to, the following aspherical formula:

[0120]

[0121] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. The conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface in Example 2 are shown in Table 4 below:

[0122] Table 4: Relevant values ​​for each aspherical surface in Embodiment 2 of the optical system in this case

[0123]

[0124] Figure 4 The diagram shown is the field curvature and distortion curve of the optical system in Embodiment 2 of this case. Figure 4 It can be seen that Embodiment 2 of the optical system in this case can achieve good imaging quality and has high imaging quality.

[0125] Figure 5 The following is an embodiment of the optical system of this case, wherein the focal length of the first lens (1) is f1=-13.09mm, the focal length of the second lens (2) is f2=-8.67mm, the focal length of the third lens (3) is f3=30.56mm, the focal length of the fourth lens (4) is f4=19.81mm, the focal length of the first combined lens is f34=19.15mm, the focal length of the sixth lens (6) is f6=9.62mm, the focal length of the seventh lens (7) is f7=17.66mm, the focal length of the eighth lens (8) is f8=14.54mm, the focal length of the ninth lens (9) is f9=-5.10mm, the focal length of the second combined lens is f89=-9.94mm, the focal length of the tenth lens (10) is f10=17.73mm, and the focal length of the entire optical system is f=3.20mm.

[0126] The surface type, radius of curvature, thickness, refractive index, and Abbe number of each lens in Example 3 are shown in Table 5 below:

[0127] Table 5. Basic parameters of each lens in Embodiment 3 of the optical system of this case.

[0128]

[0129] Specifically, in Embodiment 3 of the optical system in this case, the object-side and image-side surfaces of the second lens (2), the sixth lens (6), the seventh lens (7), and the tenth lens (10) are all aspherical surfaces. The surface shape of the aspherical surfaces of each lens can be defined using, but is not limited to, the following aspherical formula:

[0130]

[0131] Where x is the distance from the corresponding point on the aspherical surface to the plane tangent to the vertex of the surface, h is the distance from the corresponding point on the aspherical surface to the optical axis, c is the curvature of the vertex of the aspherical surface, k is the conic coefficient, and Ai is the coefficient corresponding to the i-th higher-order term in the aspherical surface shape formula. The conic coefficients and higher-order coefficients A4, A6, A8, A10, A12, A14, and A16 of each aspherical surface in Example 3 are shown in Table 6 below:

[0132] Table 6: Relevant values ​​for each aspherical surface in Embodiment 3 of the optical system in this case

[0133]

[0134] Figure 6 The diagram shown is the field curvature and distortion curve of the optical system in embodiment three of this case. Figure 6 It can be seen that Embodiment 3 of the optical system in this case can achieve good imaging quality and has high imaging quality.

[0135] A camera module includes an optical lens, wherein the optical system described above is installed within the optical lens.

[0136] By incorporating the aforementioned optical system, the camera module in this case can be better adapted to large-size, high-pixel image sensors. This not only meets the basic requirements for panoramic shooting but also further improves image clarity and image detail, making the imaging performance of action cameras and panoramic cameras more competitive in terms of field of view.

[0137] As stated above, this case protects an optical system adapted for large target surface high pixel panoramic imaging and a camera module using it. All technical solutions that are the same as or similar to this case should be considered to fall within the protection scope of this case.

Claims

1. An optical system adapted for high-pixel panoramic imaging of large target surfaces, comprising, in sequence along the optical axis from the object plane to the image plane, a first lens (1), a second lens (2), a third lens (3), a fourth lens (4), a fifth reflective element (5), a sixth lens (6), a seventh lens (7), an eighth lens (8), a ninth lens (9), and a tenth lens (10), characterized in that... The first lens (1) has a negative optical power and is provided with a convex first object-side surface S1 and a concave first image-side surface S2. The second lens (2) has a negative optical power and is provided with a convex second object-side surface S3 and a concave second image-side surface S4. The third lens (3) has a positive optical power and is provided with a convex third object-side surface S5 and a concave third image-side surface S6. The fourth lens (4) has a positive optical power and is provided with a convex fourth object-side surface S7 and a convex fourth image-side surface S8. The fifth reflecting element (5) is used to reflect the light beam passing through the fourth lens (4) to the sixth lens (6). The sixth lens (6) has a positive optical power and is provided with a convex sixth object-side surface S11. The seventh lens (7) has a positive optical power and is provided with a convex seventh object side surface S13 and a convex seventh image side surface S14. The eighth lens (8) has a positive optical power and is provided with a convex eighth object side surface S15 and an convex eighth image side surface S16. The ninth lens (9) has a negative optical power and is provided with a concave ninth object side surface S17 and a concave ninth image side surface S18. The tenth lens (10) has a positive optical power and is provided with a convex tenth object side surface S19 and a concave tenth image side surface S20. The third lens (3) and the fourth lens (4) are combined to form a first combined lens. The eighth lens (8) and the ninth lens (9) are combined to form a second combined lens.

2. The optical system for adapting to high-pixel panoramic imaging of large target surfaces according to claim 1, characterized in that... The focal length of the first lens (1) is f1 and -13.5mm < f1 < -11.5mm; And / or the focal length of the second lens (2) is f2 and -9mm < f2 < -7mm; And / or the focal length of the third lens (3) is f3 and 28mm < f3 < 32mm; And / or the focal length of the fourth lens (4) is f4 and 19mm < f4 < 21mm; And / or the focal length of the first combined lens is f34 and 17mm < f34 < 20mm; And / or the focal length of the sixth lens (6) is f6 and 8mm < f6 < 10mm; And / or the focal length of the seventh lens (7) is f7 and 15mm < f7 < 18mm; And / or the focal length of the eighth lens (8) is f8 and 13mm < f8 < 15mm; And / or the focal length of the ninth lens (9) is f9 and -6mm < f9 < -4mm; And / or the focal length of the second combined lens is f89 and -10mm < f89 < 17mm; And / or the focal length of the tenth lens (10) is f10 and 16mm < f10 < 18mm.

3. The optical system for adapting to high-pixel panoramic imaging of large target surfaces according to claim 1, characterized in that... The focal length of the optical system is f, and the focal length of the first lens (1) is f1, and -4.5 < f1 / f < -3.5; And / or the focal length of the second lens (2) is f2 and -3 < f2 / f < -2.5; And / or the focal length of the third lens (3) is f3 and 9 < f3 / f < 11; And / or the focal length of the fourth lens (4) is f4 and 6 < f4 / f < 7; And / or the focal length of the first combined lens is f34 and 5.5 < f34 / f < 7; And / or the focal length of the sixth lens (6) is f6 and 2.5 < f6 / f < 3.5; And / or the focal length of the seventh lens (7) is f7 and 5 < f7 / f < 6; And / or the focal length of the eighth lens (8) is f8 and 4 < f8 / f < 5; And / or the focal length of the ninth lens (9) is f9 and -2 < f9 / f < -1; And / or the focal length of the second combined lens is f89 and -3.5 < f89 / f < 6; And / or the focal length of the tenth lens (10) is f10 and 5 < f10 / f < 6.

4. An optical system for adapting to high-pixel panoramic imaging of large target surfaces according to any one of claims 1 to 3, characterized in that... The focal length of the optical system is f, the axial distance from the first object side surface S1 of the first lens (1) to the imaging surface of the optical system is TTL, half the diagonal length of the effective pixel area on the imaging surface of the optical system is ImgH, and 0.2 < (f × ImgH) / TTL < 0.

50.

5. An optical system adapted for large target surface high-pixel panoramic imaging according to any one of claims 1 to 3, characterized in that... The first lens (1) has a refractive index of Nd1 and an Abbe number of Vd1, and 1.50 < Nd1 < 2.00 and 30.00 < Vd1 < 45.00; And / or the refractive index of the second lens (2) is Nd2, the Abbe number is Vd2, and 1.50 < Nd2 < 2.00, 40.00 < Vd2 < 60.00; And / or the refractive index of the third lens (3) is Nd3, the Abbe number is Vd3, and 1.20 < Nd3 < 2.00, 30.00 < Vd3 < 95.00; And / or the fourth lens (4) has a refractive index of Nd4, an Abbe number of Vd4, and 1.50 < Nd4 < 2.00, 30.00 < Vd4 < 40.00; And / or the refractive index of the fifth reflective element (5) is Nd5, the Abbe number is Vd5, and 1.70 < Nd5 < 2.30, 20.00 < Vd5 < 30.00; And / or the refractive index of the sixth lens (6) is Nd6, the Abbe number is Vd6, and 1.20 < Nd6 < 2.00, 60.00 < Vd6 < 90.00; And / or the refractive index of the seventh lens (7) is Nd7, the Abbe number is Vd7, and 1.20 < Nd7 < 2.00, 60.00 < Vd7 < 100.00; And / or the refractive index of the eighth lens (8) is Nd8, the Abbe number is Vd8, and 1.50 < Nd8 < 2.00, 40.00 < Vd8 < 90.00; And / or the refractive index of the ninth lens (9) is Nd9, the Abbe number is Vd9, and 1.70 < Nd9 < 2.30, 20.00 < Vd9 < 50.00; And / or the refractive index of the tenth lens (10) is Nd10, the Abbe number is Vd10, and 1.30 < Nd10 < 1.60, 70.00 < Vd10 < 100.

00.

6. An optical system for adapting to high-pixel panoramic imaging of large target surfaces according to any one of claims 1 to 3, characterized in that... The full field of view of the optical system is between 180° and 220°.

7. An optical system adapted for large target surface high-pixel panoramic imaging according to any one of claims 1 to 3, characterized in that... The aperture Fno of the optical system has a value range of 1.9 ≤ Fno ≤ 2.

2.

8. An optical system adapted for large target surface high-pixel panoramic imaging according to any one of claims 1 to 3, characterized in that... The first combined lens is a cemented lens; And / or the second combined lens is a cemented lens; And / or the first lens (1), the third lens (3), the fourth lens (4), the eighth lens (8) and the ninth lens (9) are all spherical lenses, and the second lens (2), the sixth lens (6), the seventh lens (7) and the tenth lens (10) are all aspherical lenses.

9. An optical system adapted for large target surface high-pixel panoramic imaging according to any one of claims 1 to 3, characterized in that... The optical system also includes an aperture stop STO (11) disposed between the sixth lens (6) and the seventh lens (7).

10. A camera module, comprising an optical lens, characterized in that... The optical lens is equipped with the optical system according to any one of claims 1 to 9.

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