Optical imaging systems, modules and electronic devices

Abstract

The present invention discloses an optical imaging system, a module and an electronic device, which sequentially include, along the optical axis from the object side to the image side: a first lens, a prism, a second lens, a third lens and a fourth lens. The first lens has a negative refractive power, and the object side surface of the first lens is convex near the optical axis, and the image side surface is concave near the optical axis. The prism deflects the optical path, and the prism has a reflecting surface. The second lens has a refractive power, and the object side surface of the second lens is convex near the optical axis. The third lens has a refractive power, and the object side surface of the third lens is convex near the optical axis. The fourth lens has a refractive power. The optical imaging system satisfies the following conditional formula: 0.1mm<supgt;‑1< / supgt; < EFL / (TTL21*TTL22) < 0.3mm<supgt;‑1< / supgt;. According to the optical imaging system of the embodiment of the present invention, while meeting the miniaturized design, it has a large light passing amount and a large field of view, meeting the needs of high-definition images and long-distance shooting.

Description

Technical Field

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

[0002] As the miniaturized and ultra-thin designs of mobile phones, drones, and tablet computers are popular among consumers, the accessories of electronic products are also further compressed to cater to the terminal products, so that the overall volume of optical lenses is compressed and various miniaturized lens design products appear. However, if higher-quality camera functions are to be achieved, excessive compression of the lens volume will sacrifice image quality. Therefore, periscope camera lenses came into being. Without changing the ultra-thin miniaturization of terminal products, it is possible to achieve high-definition image shooting effects without compressing the lens volume.

[0003] Currently, various types of periscope lenses dominate the camera of high-end mobile phones due to their length and zoom advantages, and are very popular among consumers. However, periscope camera lenses have a smaller light transmission and smaller field of view than ordinary lenses, which has become a technical difficulty that needs to be overcome. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an optical imaging system, which has a large light throughput and a large field of view while meeting the requirements of micro-design, so as to meet the needs of high-definition images and long-range shooting.

[0005] The present invention further provides a module having the optical imaging system.

[0006] The invention also provides an electronic device having the module.

[0007] According to the optical imaging system of the first aspect of the present invention, the optical imaging system includes, from the object side to the image side along the optical axis, a first lens, a prism, a second lens, a third lens and a fourth lens, wherein the first lens has a negative refractive power, and the object side surface of the first lens is a convex surface at the near optical axis, and the image side surface is a concave surface at the near optical axis, the prism deflects the light path, the prism has a reflecting surface, the second lens has a refractive power, and the object side surface of the second lens is a convex surface at the near optical axis, the third lens has a refractive power, and the object side surface of the third lens is a convex surface at the near optical axis, the fourth lens has a refractive power, and the optical imaging system satisfies the following conditional formula: 0.1mm -1 <EFL / (TTL21*TTL22)<0.3mm -1, where EFL is the effective focal length of the optical imaging system; TTL21 is the distance from the object side surface of the first lens to the reflection surface of the prism on the optical axis; TTL22 is the distance from the reflection surface of the prism to the imaging surface on the optical axis.

[0008] The optical imaging system according to the embodiment of the present invention is composed of four lenses, enabling the optical imaging system to meet the miniaturized design, so that the optical imaging system occupies a small space and has strong practicability. In addition, by providing the first lens at the object side surface of the prism, not only can the light transmission amount of the module with the optical imaging system be increased, but also the field of view range can be expanded, meeting the requirements of high-definition images and long-distance shooting.

[0009] In addition, through 0.1mm -1 <EFL / (TTL21*TTL22)<0.3mm -1 , enabling the module with the optical imaging system to balance the long focal length and miniaturized design, so that the module occupies a small space and has excellent imaging quality.

[0010] In addition, the optical imaging system according to the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the optical imaging system satisfies the following conditional formula: 1 < ETL3 / CTL3 < 2.5, where ETL3 is the edge thickness of the effective aperture of the third lens; CTL3 is the thickness of the third lens on the optical axis.

[0012] In some embodiments, the optical imaging system satisfies the following conditional formula: 0.2 < FNO / EFL < 0.5, where FNO is the aperture number of the optical imaging system; EFL is the effective focal length of the optical imaging system.

[0013] In some other embodiments, the optical imaging system satisfies the following conditional formula: 0.6 < RAD(AngleS1) / RAD(FOV) < 1.6, where RAD(AngleS1) is the radian value of the incident angle of the chief ray reaching the maximum field of view point passing through the object side surface of the first lens; RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system.

[0014] In still some other embodiments, the optical imaging system satisfies the following conditional formula: -40 < F1 / EFL < 0, where F1 is the effective focal length of the first lens; EFL is the effective focal length of the optical imaging system.

[0015] In some embodiments, the optical imaging system satisfies the following conditional expression: 3 < EFL / Imgh < 4, where EFL is the effective focal length of the optical imaging system; Imgh is the diagonal length of the effective photosensitive area on the imaging surface.

[0016] In some other embodiments, the optical imaging system satisfies the following conditional expression: FBL / TTL22 > 0.6, where FBL is the shortest distance from the image side surface of the fourth lens to the imaging surface; TTL22 is the distance from the reflecting surface of the prism to the imaging surface on the optical axis.

[0017] Optionally, the optical imaging system satisfies the following conditional expression: 16 mm < DL*FNO < 19 mm, where DL is the effective diameter of the aperture; FNO is the f-number of the optical imaging system.

[0018] In some embodiments, the optical imaging system satisfies the following conditional expression: 0.5 < DL / Imgh < 0.8, where DL is the effective diameter of the aperture; Imgh is the diagonal length of the effective photosensitive area on the imaging surface.

[0019] The present invention further provides a module having the optical imaging system of the above embodiments.

[0020] The module according to the embodiment of the second aspect of the present invention includes: an optical imaging system and an electronic photosensitive element, and the electronic photosensitive element is disposed on the image side of the optical imaging system.

[0021] For the module according to the embodiment of the present invention, by disposing the optical imaging system on the module, the module can meet the miniaturized design, and can also have a relatively large field of view, so that the practicality of the module is high.

[0022] The present invention also provides an electronic device having the module of the above embodiments.

[0023] The electronic device according to the embodiment of the third aspect of the present invention includes: a module and a housing, and the module is disposed in the housing.

[0024] For the electronic device according to the embodiment of the present invention, by disposing the module in the electronic device, the photos or videos taken by the electronic device using the module have high quality, and after the module is disposed on an electronic device with a small volume and a thin thickness, it will not affect the overall shape of the electronic device.

[0025] The additional aspects and advantages of the present invention will be given in the following detailed description section, some of which will become obvious from the following description, or can be learned through the practice of the present invention. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic structural diagram of Embodiment 1 of an optical imaging system according to an embodiment of the present invention;

[0028] Figure 2 are the spherical chromatic aberration diagram (mm), the astigmatism diagram (mm), and the distortion diagram (%) in Example 1 of the optical imaging system according to the embodiment of the present invention;

[0029] Figure 3 is a schematic structural diagram of Embodiment 2 of an optical imaging system according to an embodiment of the present invention;

[0030] Figure 4 are the spherical chromatic aberration diagram (mm), the astigmatism diagram (mm), and the distortion diagram (%) in Example 2 of the optical imaging system according to the embodiment of the present invention;

[0031] Figure 5 is a schematic structural diagram of Embodiment 3 of an optical imaging system according to an embodiment of the present invention;

[0032] Figure 6 are the spherical chromatic aberration diagram (mm), the astigmatism diagram (mm), and the distortion diagram (%) in Example 3 of the optical imaging system according to the embodiment of the present invention;

[0033] Figure 7 is a schematic structural diagram of Embodiment 4 of an optical imaging system according to an embodiment of the present invention;

[0034] Figure 8 are the spherical chromatic aberration diagram (mm), the astigmatism diagram (mm), and the distortion diagram (%) in Example 4 of the optical imaging system according to the embodiment of the present invention;

[0035] Fig. 9 is a schematic structural diagram of Example 5 of an optical imaging system according to an embodiment of the present invention;

[0036] Fig.10 1 and 2 are the spherical chromatic aberration diagram (mm), astigmatism diagram (mm), and distortion diagram (%) in Example 5 of the optical imaging system according to the embodiment of the present invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it is to be understood that a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] Reference below Figure 1-Figure 10 The optical imaging system 100 according to an embodiment of the present invention is described. The optical imaging system 100 may be disposed on a module, so that an object passing through the optical imaging system 100 may be imaged in the module.

[0041] like Figure 1 , Figure 3 , Figure 5 , Figure 7 , Fig. 9 As shown, the optical imaging system 100 according to the embodiment of the present invention includes, in sequence from the object side to the image side along the optical axis OO', a first lens L1, a prism, a second lens L2, a third lens L3 and a fourth lens L4.

[0042] Specifically, the first lens L1 has negative refractive power, and the object side surface of the first lens L1 is convex at the near optical axis OO', the image side surface is concave at the near optical axis OO', the prism deflects the light path, and the prism has a reflecting surface, the second lens L2 has refractive power, and the object side surface of the second lens L2 is convex at the near optical axis OO', the third lens L3 has refractive power, and the object side surface of the third lens L3 is convex at the near optical axis OO', the fourth lens L4 has refractive power, and the optical imaging system 100 satisfies the following conditional formula: 0.1mm -1 <EFL / (TTL21*TTL22)<0.3mm -1 , where EFL is the effective focal length of the optical imaging system 100, TTL21 is the distance from the object side of the first lens L1 to the reflection surface of the prism on the optical axis OO', and TTL22 is the distance from the reflection surface of the prism to the imaging surface on the optical axis OO'.

[0043] For example Figure 1As shown, in the direction from the object side to the image side, the two side surfaces of the first lens L1 are respectively denoted as S1 and S2, the two side surfaces of the second lens L2 are respectively denoted as S7 and S8, the two side surfaces of the third lens L3 are respectively denoted as S9 and S10, the two side surfaces of the fourth lens L4 are respectively denoted as S11 and S12, the two side surfaces of the infrared cutoff filter are respectively denoted as S13 and S14, and the imaging surface is S15.

[0044] Optionally, a prism is disposed between the first lens L1 and the second lens L2, so that the light incident into the first lens L1 can change the path of the light after passing through the prism and be reflected onto the second lens L2, and the light incident into the first lens L1 and the light incident into the second lens L2 are perpendicular to each other, so that the optical imaging system 100 is ultra-thin and miniaturized, wherein the incident surface of the prism is S3, the reflection surface is S4, and the light emitting surface is S5. In addition, the aperture STO is disposed between the first lens L1 and the second lens L2, specifically, the aperture STO is disposed between the prism and the second lens L2.

[0045] In addition, by making the optical imaging system 100 satisfy the conditional expression: 0.1 mm -1 <EFL / (TTL21*TTL22)<0.3mm -1 , so that the module with the optical imaging system 100 can balance the design of telephoto and miniaturization, so that the module occupies a smaller space but has better imaging quality, thereby making the module can meet the current market needs.

[0046] It is understandable that if EFL / (TTL21*TTL22)≥0.3mm -1 , when the focal length remains unchanged, the transition compression module volume will cause the image quality to decline; if EFL / (TTL21*TTL22)≤0.1mm -1 , it will cause the volume to be too large and fail to meet the requirements of miniaturization design.

[0047] According to the optical imaging system 100 of the embodiment of the present invention, the optical imaging system 100 is composed of four lenses, so that the optical imaging system 100 can meet the requirements of miniature design, so that the optical imaging system 100 occupies a small space and has strong practicality. In addition, by providing the first lens L1 at the object side of the prism, not only the amount of light passing through the module having the optical imaging system 100 can be increased, but also the field of view can be expanded, which can meet the needs of high-definition images and long-range shooting.

[0048] In addition, by 0.1mm -1 <EFL / (TTL21*TTL22)<0.3mm -1 , so that the module with the optical imaging system 100 can balance the design of telephoto and miniaturization, so that the module occupies a smaller space and has better imaging quality.

[0049] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional formula: 1 < ETL3 / CTL3 < 2.5, where ETL3 is the edge thickness of the effective aperture of the third lens L3; CTL3 is the thickness of the third lens L3 on the optical axis OO'.

[0050] Thus, the third lens L3 can effectively balance the optical path difference of the optical imaging system 100 and achieve the function of correcting field curvature, while ensuring a good molding yield. Therefore, the ratio of the edge thickness to the center thickness needs to be within a certain range. In addition, if ETL3 / CTL3 is too large or too small, it will affect the molding yield, and if the center is too thin or too thick, it will be difficult for the central light rays and the edge light rays to converge near the image plane, resulting in excessive field curvature. Therefore, by ensuring a certain proportional relationship between the center and edge thicknesses of the third lens L3, the processability and molding yield can be guaranteed, and the imaging stability can be ensured.

[0051] In addition, if ETL3 / CTL3 < 1, the center will be too thick relative to the edge, resulting in excessive field curvature of the image plane. If ETL3 / CTL3 > 2.5, the center will be too thin, which will reduce the molding yield of production and processing.

[0052] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional formula: 0.2 < FNO / EFL < 0.5, where FNO is the f-number of the optical imaging system 100; EFL is the effective focal length of the optical imaging system 100.

[0053] Thus, by making the optical imaging system 100 satisfy the conditional formula 0.2 < FNO / EFL < 0.5, the module with the optical imaging system 100 can take into account the long focal length performance and miniaturization design requirements of the module system, and can also provide sufficient light transmission for camera shooting to meet the needs of high-quality and high-definition shooting. In addition, if FNO / EFL ≥ 0.5, the focal length will be sacrificed on the premise of taking into account the light transmission, affecting the professional shooting effect; if FNO / EFL ≤ 0.2, the light transmission of the optical imaging system 100 will be insufficient, and the clarity of the captured image will decrease.

[0054] In some embodiments, the optical imaging system 100 satisfies the conditional formula: 0.6 < RAD(AngleS1) / RAD(FOV) < 1.6, where RAD(AngleS1) is the radian value of the incident angle of the chief ray reaching the maximum field of view point passing through the object side surface of the first lens L1; RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system 100.

[0055] It can be understood that the periscope camera module is prone to having a smaller light throughput compared to ordinary lenses. In this lens system, the field of view angle of the telephoto optical imaging system 100 is not large relative to that of an ordinary module. Therefore, the amount of incident light is limited. The first lens L1 is arranged in front of the prism to change the originally parallel vertically incident light into light incident on the optical imaging system 100 at a certain angle, thereby increasing the amount of incident light on the optical imaging system 100. However, if the angle is too large, light leakage will occur during prism reflection. Therefore, through reasonable cooperation between the two, it can ensure that light information within a sufficient range enters the optical imaging system 100 for imaging.

[0056] In addition, if RAD(AngleS1) / RAD(FOV)≥1.6, the angle of incidence on the prism will be too large, resulting in light leakage, a reduced field of view angle, and a decreased light intensity; if RAD(AngleS1) / RAD(FOV)≤0.6, the light information entering the first lens L1 will become less, which is not conducive to the imaging range. At the same time, it will cause the field of view angle to become larger and the depth of focus to become shorter, sacrificing the telephoto performance.

[0057] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional formula: -40 < F1 / EFL < 0, where F1 is the optical effective focal length of the first lens L1; EFL is the effective focal length of the optical imaging system 100.

[0058] It can be understood that the periscope camera module is prone to having a smaller light transmission amount compared to ordinary lenses. In this lens system, the first lens L1 is arranged in front of the prism to change the originally parallel vertically incident light into light incident on the optical imaging system 100 at a certain angle, increasing the light throughput of the system. By reasonably controlling the focal length of the first lens L1 and the effective focal length of the optical imaging system 100, it can not only ensure better convergence of light on the imaging surface S15 but also ensure good light throughput. In addition, if F1 / EFL≤-40, the optical length of the lens group is too short, which will increase the sensitivity of the imaging system 100 and is not conducive to the convergence of light on the imaging surface S15; if F1 / EFL≥0, it is not conducive to the first lens L1 collecting light information, resulting in a decrease in light throughput.

[0059] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional formula: 3 < EFL / Imgh < 4, where EFL is the effective focal length of the optical imaging system 100, and Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15.

[0060] Since the focal length of the optical imaging system 100 of the present application is relatively large, the total length of the optical imaging system 100 is larger than that of a general module. Therefore, satisfying the relational expression 3 < EFL / Imgh < 4 can take into account miniaturization and high-definition shooting at the same time. If EFL / Imgh ≥ 4, while ensuring a high-definition imaging effect, the focal length increases, resulting in an overly long length of the optical imaging system 100 and an increased assembly space, which is not conducive to miniaturization design; if EFL / Imgh ≤ 3, it will cause the depth of focus to shorten, which is not conducive to the convergence of light on the imaging surface S15.

[0061] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional expression: FBL / TTL22 > 0.6, where FBL is the shortest distance from the image side surface of the fourth lens L4 to the imaging surface S15; TTL22 is the distance from the reflecting surface of the prism to the imaging surface S15 on the optical axis OO'. That is to say, FBL is the shortest distance from S12 to S15, and TTL22 is the distance from S4 to S15 on the optical axis OO'.

[0062] Thus, while the optical imaging system 100 satisfies miniaturization, it can ensure that the system has a sufficient focusing range, improve the module assembly yield of the optical imaging system 100 of the present invention, and at the same time ensure that the optical imaging system 100 has a relatively large depth of focus, capable of obtaining more depth information of the object side. If FBL / TTL2 < 0.6, the process tolerance during the module assembly process is too small, resulting in too low a yield and increasing the production process difficulty, and at the same time, it cannot ensure the depth of focus of the optical imaging system 100, leading to poor imaging quality.

[0063] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional expression: 16 mm < DL*FNO < 19 mm, where DL is the effective diameter of the diaphragm STO; FNO is the f-number of the optical imaging system 100.

[0064] Thus, by reasonably controlling the ratio relationship between the effective aperture diameter of the diaphragm STO and the f-number, the imaging system 100 can have the best light transmission amount and picture clarity. If DL*FNO < 16 mm, it is not conducive to the convergence of light on the imaging surface S15, and a large amount of stray light is generated, resulting in a decline in shooting quality. If DL*FNO > 19 mm, it will cause the aperture of the diaphragm STO to be too large, and the marginal rays cannot be reasonably intercepted, resulting in an increase in field curvature and the formation of marginal distortion images.

[0065] In some embodiments of the present invention, the optical imaging system 100 satisfies the following conditional expression: 0.5 < DL / Imgh < 0.8, where DL is the effective diameter of the diaphragm STO; Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15.

[0066] It is understandable that the effective diameter of the aperture STO in the optical imaging system 100 determines the light flux of the entire optical imaging system 100, and the size of the photosensitive surface determines the image clarity and pixel size of the entire camera system. The reasonable coordination of the two can ensure sufficient light flux and image clarity. If DL / Imgh>0.8, it will cause overexposure and too high brightness, affecting the image quality; if DL / Imgh<0.5, it will cause insufficient light flux, and when the relative brightness of the light is not enough, the image sensitivity will decrease.

[0067] The present invention will be described in detail through the following specific embodiments with reference to the accompanying drawings.

[0068] Example 1

[0069] See also Figure 1-Figure 2 As shown, the optical imaging system 100 of this embodiment meets the conditions of the following Tables 1 and 2.

[0070] Table 1

[0071]

[0072]

[0073] Wherein, EFL is the effective focal length of the optical imaging system 100, FNO is the aperture number of the optical imaging system 100, TTL21 is the distance from the object side surface of the first lens L1 to the reflecting surface of the prism on the optical axis OO', TTL22 is the distance from the center of the reflecting surface of the prism to the imaging surface S15 on the optical axis OO', ETL3 is the edge thickness of the effective aperture of the third lens L3, CTL3 is the thickness of the third lens L3 on the optical axis OO', RAD(AngleS1) is the radian value of the incident angle of the main light reaching the maximum field of view point passing through the object side surface of the first lens L1, RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system 100, F1 is the effective focal length of the first lens L1, Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15, FBL is the shortest distance from the image side surface of the fourth lens L4 to the imaging surface S15, and DL is the effective diameter of the aperture STO.

[0074] In Table 1, S3 represents the incident light surface of the prism, S4 represents the light reflecting surface of the prism, and S5 represents the light emitting surface.

[0075] The first lens L1 has negative refractive power. The object-side surface S1 of the first lens L1 is convex at the near optical axis OO', and the image-side surface S2 is concave at the near optical axis OO'. The object-side surface S1 of the first lens L1 is convex at the circumference, and the image-side surface S2 is concave at the circumference, and both surfaces of the first lens L1 are aspherical.

[0076] The second lens L2 has positive refractive power. The object-side surface S7 of the second lens L2 is convex at the near optical axis OO', and the image-side surface S8 is concave at the near optical axis OO'. The object-side surface S7 of the second lens L2 is convex at the circumference, and the image-side surface S8 is concave at the circumference, and both surfaces of the second lens L2 are aspherical.

[0077] The third lens L3 has negative refractive power. The object-side surface S9 of the third lens L3 is convex at the near optical axis OO', and the image-side surface S10 is concave at the near optical axis OO'. The object-side surface S9 of the third lens L3 is convex at the circumference, and the image-side surface S10 is concave at the circumference, and both surfaces of the third lens L3 are aspherical.

[0078] The fourth lens L4 has positive refractive power. The object-side surface S11 of the fourth lens L4 is concave at the near optical axis OO', and the image-side surface S12 is convex at the near optical axis OO'. The object-side surface S11 of the fourth lens L4 is concave at the circumference, and the image-side surface S12 is convex at the circumference, and both surfaces of the fourth lens L4 are aspherical.

[0079] The lens surface on the near optical axis OO' indicates that the portion of the lens surface on the near optical axis OO' is convex, concave or flat, and the lens surface on the circumference indicates that the portion of the lens surface on the circumferential edge is convex, concave or flat.

[0080] The following table shows the aspheric high-order coefficients of aspheric lenses: A4, A6, A8, A10, A12, A14, A16, A18, A20:

[0081] Table 2

[0082] Surface number S1 S2 S7 S8 S9 S10 S11 S12 k 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 -5.18E-05 -2.19E-04 -3.89E-03 -2.02E-02 3.43E-03 2.53E-02 -5.68E-03 -7.40E-04 A6 -4.94E-06 5.30E-06 -7.20E-04 4.05E-03 8.50E-03 1.21E-02 2.89E-03 5.10E-04 A8 2.10E-06 1.43E-06 1.00E-04 -2.21E-03 -2.71E-03 -3.05E-03 1.70E-04 0.00E+00 A10 -3.17E-07 -8.35E-07 0.00E+00 4.40E-04 4.20E-04 4.10E-04 -7.00E-05 -1.00E-05 A12 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A20 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0083] Figure 2 (a) is a diagram of the longitudinal spherical aberration of Example 1, which indicates the deviation of the convergence focus of light of different wavelengths after passing through the optical imaging system 100. The ordinate of the diagram indicates the normalized pupil coordinate from the center of the pupil to the edge of the pupil, and the abscissa of the diagram indicates the distance from the imaging plane S15 to the intersection of the light and the optical axis OO' (in mm). Figure 2The wavelengths of the light used in (a) are 470.000nm, 510.000nm, 587.56nm, 610.000nm, and 650.000nm, respectively. The focus offset of the five light rays after being converged by the optical imaging system 100 is in the range of -0.05mm to 0.05mm. It can be seen from the longitudinal spherical aberration diagram of Example 1 that the convergence focus deviation of the light rays of each wavelength in Example 1 tends to be consistent, and the diffuse spots or color halos in the imaging picture are effectively suppressed.

[0084] Figure 2 (b) is the Astigmatic Field Curves of the optical imaging system 100 of Example 1, where the S curve represents the sagittal field curvature at 587.56nm, and the T curve represents the meridional field curvature at 587.56nm. After the light with a wavelength of 587.56nm passes through the optical imaging system 100, the focus offset of the sagittal field curvature and the meridional field curvature is in the range of -0.08mm to 0.08mm. Figure 2 (b) It can be seen that the field curvature of the optical imaging system 100 of Example 1 is relatively small, the field curvature and astigmatism of each field of view (especially the edge field of view) are well corrected, and the center and edge of the field of view have clear images.

[0085] Figure 2 (c) is a distortion diagram of the optical imaging system 100 of Example 1, which shows that after the light with a wavelength of 587.56nm passes through the optical imaging system 100, its distortion rate is in the range of -1.0% to 1.0%. Figure 2 (c) It can be seen that the image deformation caused by the main light beam is small, and the imaging quality of the optical imaging system 100 is excellent.

[0086] In summary, from Figure 2 (a)-(c) reflect that the optical imaging system 100 of Example 1 has small overall aberration and excellent imaging quality.

[0087] Example 2

[0088] See also Figure 3-Figure 4 As shown, the optical imaging system 100 of this embodiment satisfies the conditions of the following Tables 3 and 4.

[0089] Table 3

[0090]

[0091] Wherein, EFL is the effective focal length of the optical imaging system 100, FNO is the aperture number of the optical imaging system 100, TTL21 is the distance from the object side surface of the first lens L1 to the reflecting surface of the prism on the optical axis OO', TTL22 is the distance from the center of the reflecting surface of the prism to the imaging surface S15 on the optical axis OO', ETL3 is the edge thickness of the effective aperture of the third lens L3, CTL3 is the thickness of the third lens L3 on the optical axis OO', RAD(AngleS1) is the radian value of the incident angle of the main light reaching the maximum field of view point passing through the object side surface of the first lens L1, RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system 100, F1 is the effective focal length of the first lens L1, Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15, FBL is the shortest distance from the image side surface of the fourth lens L4 to the imaging surface S15, and DL is the effective diameter of the aperture STO.

[0092] In Table 3, S3 represents the incident light surface of the prism, S4 represents the light reflecting surface of the prism, and S5 represents the light emitting surface.

[0093] The first lens L1 has negative refractive power. The object-side surface S1 of the first lens L1 is convex at the near optical axis OO', and the image-side surface S2 is concave at the near optical axis OO'. The object-side surface S1 of the first lens L1 is convex at the circumference, and the image-side surface S2 is concave at the circumference, and both surfaces of the first lens L1 are aspherical.

[0094] The second lens L2 has positive refractive power. The object-side surface S7 of the second lens L2 is convex at the near optical axis OO', and the image-side surface S8 is convex at the near optical axis OO'. The object-side surface S7 of the second lens L2 is convex at the circumference, and the image-side surface S8 is concave at the circumference, and both surfaces of the second lens L2 are aspherical.

[0095] The third lens L3 has negative refractive power. The object-side surface S9 of the third lens L3 is convex at the near optical axis OO', and the image-side surface S10 is concave at the near optical axis OO'. The object-side surface S9 of the third lens L3 is convex at the circumference, and the image-side surface S10 is concave at the circumference, and both surfaces of the third lens L3 are aspherical.

[0096] The fourth lens L4 has positive refractive power. The object-side surface S11 of the fourth lens L4 is convex at the near optical axis OO', and the image-side surface S12 is convex at the near optical axis OO'. The object-side surface S11 of the fourth lens L4 is convex at the circumference, and the image-side surface S12 is convex at the circumference, and both surfaces of the fourth lens L4 are aspherical.

[0097] The lens surface near the optical axis OO' indicates that the portion of the lens surface near the optical axis OO' is convex, concave or flat, and the lens surface on the circumference indicates that the portion of the lens surface at the circumferential edge is convex, concave or flat.

[0098] The following table shows the aspheric high-order coefficients of aspheric lenses: A4, A6, A8, A10, A12, A14, A16, A18, A20:

[0099] Table 4

[0100] Surface number S1 S2 S7 S8 S9 S10 S11 S12 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 -1.55E-04 -3.65E-04 -2.83E-03 -2.03E-02 1.99E-03 2.50E-02 -8.08E-03 -1.41E-03 A6 7.46E-06 3.65E-05 -9.92E-04 4.26E-03 8.44E-03 1.14E-02 2.72E-03 2.90E-04 A8 7.01E-06 2.05E-05 1.98E-04 -1.94E-03 -2.67E-03 -2.99E-03 1.30E-04 5.00E-05 A10 -8.64E-07 -3.68E-06 -7.78E-07 3.80E-04 3.80E-04 4.10E-04 -9.00E-05 -2.00E-05 A12 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A20 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0101] like Figure 4 The aberration curve diagram, specifically, Figure 4 (a)~ Figure 4 (c) respectively represent the longitudinal spherical aberration curve, astigmatism curve and distortion diagram of Example 2 of the optical imaging system 100, Figure 4 The wavelength of 587.5618nm is set as the aberration of the reference wavelength, and the aberrations of other wavelengths (such as 470.000nm, 510.000nm, 610.000nm, 650.000nm) are compared with the aberration of the reference wavelength. In the astigmatism diagram, the aberrations in the sagittal direction and the meridional direction are shown as solid lines and short dashed lines respectively. The distortion rate of the reference wavelength is shown as Figure 4 (c) is shown. Figure 4 It can be seen from the aberration diagram that the longitudinal spherical aberration, field curvature and distortion of the optical imaging system 100 are all well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

[0102] Example 3

[0103] See also Figure 5-Figure 6 As shown, the optical imaging system 100 of this embodiment satisfies the conditions of the following Tables 5 and 6.

[0104] Table 5

[0105]

[0106] Wherein, EFL is the effective focal length of the optical imaging system 100, FNO is the aperture number of the optical imaging system 100, TTL21 is the distance from the object side surface of the first lens L1 to the reflecting surface of the prism on the optical axis OO', TTL22 is the distance from the center of the reflecting surface of the prism to the imaging surface S15 on the optical axis OO', ETL3 is the edge thickness of the effective aperture of the third lens L3, CTL3 is the thickness of the third lens L3 on the optical axis OO', RAD(AngleS1) is the radian value of the incident angle of the main light reaching the maximum field of view point passing through the object side surface of the first lens L1, RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system 100, F1 is the effective focal length of the first lens L1, Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15, FBL is the shortest distance from the image side surface of the fourth lens L4 to the imaging surface S15, and DL is the effective diameter of the aperture.

[0107] In Table 5, S3 represents the incident light surface of the prism, S4 represents the light reflecting surface of the prism, and S5 represents the light emitting surface.

[0108] The first lens L1 has negative refractive power. The object-side surface S1 of the first lens L1 is convex at the near optical axis OO', and the image-side surface S2 is concave at the near optical axis OO'. The object-side surface S1 of the first lens L1 is convex at the circumference, and the image-side surface S2 is concave at the circumference, and both surfaces of the first lens L1 are aspherical.

[0109] The second lens L2 has positive refractive power. The object-side surface S7 of the second lens L2 is convex at the near optical axis OO', and the image-side surface S8 is convex at the near optical axis OO'. The object-side surface S7 of the second lens L2 is convex at the circumference, and the image-side surface S8 is convex at the circumference, and both surfaces of the second lens L2 are aspherical.

[0110] The third lens L3 has negative refractive power. The object-side surface S9 of the third lens L3 is convex at the near optical axis OO', and the image-side surface S10 is concave at the near optical axis OO'. The object-side surface S9 of the third lens L3 is concave at the circumference, and the image-side surface S10 is convex at the circumference, and both surfaces of the third lens L3 are aspherical.

[0111] The fourth lens L4 has negative refractive power. The object-side surface S11 of the fourth lens L4 is concave at the near optical axis OO', and the image-side surface S12 is convex at the near optical axis OO'. The object-side surface S11 of the fourth lens L4 is concave at the circumference, and the image-side surface S12 is convex at the circumference, and both surfaces of the fourth lens L4 are aspherical.

[0112] The lens surface near the optical axis OO' indicates that the portion of the lens surface near the optical axis OO' is convex, concave or flat, and the lens surface on the circumference indicates that the portion of the lens surface at the circumferential edge is convex, concave or flat.

[0113] The following table shows the aspheric high-order coefficients of aspheric lenses: A4, A6, A8, A10, A12, A14, A16, A18, A20:

[0114] Table 6

[0115] Surface number S1 S2 S7 S8 S9 S10 S11 S12 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 0.00E+00 0.00E+00 -2.65E-03 -1.60E-02 1.78E-02 3.64E-02 -1.97E-02 -6.59E-03 A6 0.00E+00 0.00E+00 -1.67E-03 2.26E-03 9.79E-03 1.33E-02 3.23E-03 4.70E-04 A8 0.00E+00 0.00E+00 -7.00E-05 -1.69E-03 -2.71E-03 -2.32E-03 9.00E-05 -1.90E-04 A10 0.00E+00 0.00E+00 2.00E-05 3.20E-04 5.10E-04 2.70E-04 -1.80E-04 -1.00E-05 A12 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A14 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A20 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0116] like Figure 6 The aberration curve diagram, specifically, as Figure 6 (a)~ Figure 6 (c) respectively represent the longitudinal spherical aberration curve, astigmatism curve and distortion diagram of Example 3 of the optical imaging system 100, Figure 6The wavelength of 587.5618nm is set as the aberration of the reference wavelength, and the aberrations of other wavelengths (such as 470.000nm, 510.000nm, 610.000nm, 650.000nm) are compared with the aberration of the reference wavelength. In the astigmatism diagram, the aberrations in the sagittal direction and the meridional direction are shown as solid lines and short dashed lines respectively. The distortion rate of the reference wavelength is shown as Figure 6 (c) is shown. Figure 6 It can be seen from the aberration diagram that the longitudinal spherical aberration, field curvature and distortion of the optical imaging system 100 are all well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

[0117] Example 4

[0118] See also Figure 7-Figure 8 As shown, the optical imaging system 100 of this embodiment satisfies the conditions of the following Tables 7 and 8.

[0119] Table 7

[0120]

[0121] Wherein, EFL is the effective focal length of the optical imaging system 100, FNO is the aperture number of the optical imaging system 100, TTL21 is the distance from the object side surface of the first lens L1 to the reflecting surface of the prism on the optical axis OO', TTL22 is the distance from the center of the reflecting surface of the prism to the imaging surface S15 on the optical axis OO', ETL3 is the edge thickness of the effective aperture of the third lens L3, CTL3 is the thickness of the third lens L3 on the optical axis OO', RAD(AngleS1) is the radian value of the incident angle of the main light reaching the maximum field of view point passing through the object side surface of the first lens L1, RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system 100, F1 is the effective focal length of the first lens L1, Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15, FBL is the shortest distance from the image side surface of the fourth lens L4 to the imaging surface S15, and DL is the effective diameter of the aperture.

[0122] In Table 7, S3 represents the incident light surface of the prism, S4 represents the light reflecting surface of the prism, and S5 represents the light emitting surface.

[0123] The first lens L1 has negative refractive power. The object-side surface S1 of the first lens L1 is convex at the near optical axis OO', and the image-side surface S2 is concave at the near optical axis OO'. The object-side surface S1 of the first lens L1 is convex at the circumference, and the image-side surface S2 is concave at the circumference, and both surfaces of the first lens L1 are aspherical.

[0124] The second lens L2 has negative refractive power. The object-side surface S7 of the second lens L2 is convex at the near optical axis OO', and the image-side surface S8 is concave at the near optical axis OO'. The object-side surface S7 of the second lens L2 is convex at the circumference, and the image-side surface S8 is concave at the circumference, and both surfaces of the second lens L2 are aspherical.

[0125] The third lens L3 has positive refractive power. The object-side surface S9 of the third lens L3 is convex at the near optical axis OO', and the image-side surface S10 is convex at the near optical axis OO'. The object-side surface S9 of the third lens L3 is convex at the circumference, and the image-side surface S10 is convex at the circumference, and both surfaces of the third lens L3 are aspherical.

[0126] The fourth lens L4 has negative refractive power. The object-side surface S11 of the fourth lens L4 is convex at the near optical axis OO', and the image-side surface S12 is concave at the near optical axis OO'. The object-side surface S11 of the fourth lens L4 is convex at the circumference, and the image-side surface S12 is concave at the circumference, and both surfaces of the fourth lens L4 are aspherical.

[0127] The lens surface near the optical axis OO' indicates that the portion of the lens surface near the optical axis OO' is convex, concave or flat, and the lens surface on the circumference indicates that the portion of the lens surface at the circumferential edge is convex, concave or flat.

[0128] The following table shows the aspheric high-order coefficients of aspheric lenses: A4, A6, A8, A10, A12, A14, A16, A18, A20:

[0129] Table 8

[0130] Surface number S1 S2 S7 S8 S9 S10 S11 S12 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 0.00E+00 0.00E+00 3.80E-04 -1.66E-02 -1.90E-02 -8.97E-03 -4.94E-03 1.13E-02 A6 0.00E+00 0.00E+00 4.00E-04 2.45E-02 2.81E-02 8.64E-03 6.28E-03 -3.65E-03 A8 0.00E+00 0.00E+00 7.10E-04 -8.60E-03 -1.08E-02 -5.35E-03 -3.90E-03 4.54E-03 A10 0.00E+00 0.00E+00 -6.80E-04 -1.26E-03 -6.20E-04 1.49E-03 8.80E-04 -2.91E-03 A12 0.00E+00 0.00E+00 2.30E-04 1.20E-03 1.07E-03 -1.50E-04 4.00E-05 1.13E-03 A14 0.00E+00 0.00E+00 -3.00E-05 -1.70E-04 -1.50E-04 0.00E+00 -2.00E-05 -1.50E-04 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A20 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0131] like Figure 8 The aberration curve diagram, specifically, as Figure 8 (a)~ Figure 8 (c) respectively represent the longitudinal spherical aberration curve, astigmatism curve and distortion diagram of Example 4 of the optical imaging system 100, Figure 8 The wavelength of 587.5618nm is set as the aberration of the reference wavelength, and the aberrations of other wavelengths (such as 470.000nm, 510.000nm, 610.000nm, 650.000nm) are compared with the aberration of the reference wavelength. In the astigmatism diagram, the aberrations in the sagittal direction and the meridional direction are shown as solid lines and short dashed lines respectively. The distortion rate of the reference wavelength is shown as Figure 8 (c) is shown. Figure 8 It can be seen from the aberration diagram that the longitudinal spherical aberration, field curvature and distortion of the optical imaging system 100 are all well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

[0132] Example 5

[0133] See also Figure 9-10 As shown, the optical imaging system 100 of this embodiment satisfies the conditions of the following Tables 9 and 10.

[0134] Table 9

[0135]

[0136] Wherein, EFL is the effective focal length of the optical imaging system 100, FNO is the aperture number of the optical imaging system 100, TTL21 is the distance from the object side surface of the first lens L1 to the reflecting surface of the prism on the optical axis OO', TTL22 is the distance from the center of the reflecting surface of the prism to the imaging surface S15 on the optical axis OO', ETL3 is the edge thickness of the effective aperture of the third lens L3, CTL3 is the thickness of the third lens L3 on the optical axis OO', RAD(AngleS1) is the radian value of the incident angle of the main light reaching the maximum field of view point passing through the object side surface of the first lens L1, RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system 100, F1 is the effective focal length of the first lens L1, Imgh is the diagonal length of the effective photosensitive area on the imaging surface S15, FBL is the shortest distance from the image side surface of the fourth lens L4 to the imaging surface S15, and DL is the effective diameter of the aperture.

[0137] In Table 9, S3 represents the incident light surface of the prism, S4 represents the light reflecting surface of the prism, and S5 represents the light emitting surface.

[0138] The first lens L1 has negative refractive power. The object-side surface S1 of the first lens L1 is convex at the near optical axis OO', and the image-side surface S2 is concave at the near optical axis OO'. The object-side surface S1 of the first lens L1 is convex at the circumference, and the image-side surface S2 is concave at the circumference, and both surfaces of the first lens L1 are aspherical.

[0139] The second lens L2 has negative refractive power. The object-side surface S7 of the second lens L2 is convex at the near optical axis OO', and the image-side surface S8 is concave at the near optical axis OO'. The object-side surface S7 of the second lens L2 is convex at the circumference, and the image-side surface S8 is concave at the circumference, and both surfaces of the second lens L2 are aspherical.

[0140] The third lens L3 has positive refractive power. The object-side surface S9 of the third lens L3 is convex at the near optical axis OO', and the image-side surface S10 is concave at the near optical axis OO'. The object-side surface S9 of the third lens L3 is convex at the circumference, and the image-side surface S10 is convex at the circumference, and both surfaces of the third lens L3 are aspherical.

[0141] The fourth lens L4 has positive refractive power. The object-side surface S11 of the fourth lens L4 is convex at the near optical axis OO', and the image-side surface S12 is concave at the near optical axis OO'. The object-side surface S11 of the fourth lens L4 is convex at the circumference, and the image-side surface S12 is concave at the circumference, and both surfaces of the fourth lens L4 are aspherical.

[0142] The lens surface near the optical axis OO' indicates that the portion of the lens surface near the optical axis OO' is convex, concave or flat, and the lens surface on the circumference indicates that the portion of the lens surface at the circumferential edge is convex, concave or flat.

[0143] The following table shows the aspheric high-order coefficients of aspheric lenses: A4, A6, A8, A10, A12, A14, A16, A18, A20:

[0144] Table 10

[0145] Surface number S1 S2 S7 S8 S9 S10 S11 S12 K 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A4 -7.40E-05 -4.48E-05 2.98E-03 -1.31E-02 -2.03E-02 -3.80E-03 -3.80E-03 -5.15E-03 A6 4.63E-07 1.62E-05 4.50E-04 2.45E-02 2.78E-02 8.85E-03 8.42E-03 -2.14E-03 A8 1.06E-06 -2.60E-06 7.00E-04 -8.65E-03 -1.09E-02 -5.29E-03 -3.74E-03 5.70E-03 A10 -4.21E-07 -4.59E-07 -7.20E-04 -1.33E-03 -5.60E-04 1.56E-03 1.18E-03 -3.42E-03 A12 0.00E+00 0.00E+00 2.30E-04 1.23E-03 1.08E-03 -1.30E-04 -8.00E-05 1.38E-03 A14 0.00E+00 0.00E+00 -3.00E-05 -1.70E-04 -1.50E-04 0.00E+00 1.00E-05 -2.00E-04 A16 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A18 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 A20 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00 0.00E+00

[0146] like Fig.10 The aberration curve diagram, specifically, Fig.10 (a)~ Fig.10 (c) respectively represent the longitudinal spherical aberration curve, astigmatism curve and distortion diagram of Example 5 of the optical imaging system 100, Fig.10 The wavelength of 587.5618nm is set as the aberration of the reference wavelength, and the aberrations of other wavelengths (such as 470.000nm, 510.000nm, 610.000nm, 650.000nm) are compared with the aberration of the reference wavelength. In the astigmatism diagram, the aberrations in the sagittal direction and the meridional direction are shown as solid lines and short dashed lines respectively. The distortion rate of the reference wavelength is shown as Fig.10 (c) is shown. Fig.10 As can be seen from the aberration diagram in , the longitudinal spherical aberration, field curvature and distortion of the optical imaging system 100 are all well controlled, so that the optical imaging system 100 of this embodiment has good imaging quality.

[0147] Table 11 and Table 12 show parameter values ​​in the optical imaging system 100 of Examples 1 to 5.

[0148] Table 11

[0149]

[0150] Table 12

[0151]

[0152] The present invention further provides a module having the optical imaging system 100 of the above embodiment.

[0153] The module according to the second embodiment of the present invention includes: an optical imaging system 100 and an electronic photosensitive element, which is arranged on the image side of the optical imaging system 100. Therefore, by arranging the electronic photosensitive element on the image side of the optical imaging system 100, the light entering the imaging system 100 can be imaged on the electronic photosensitive element.

[0154] According to the module of the embodiment of the present invention, by setting the optical imaging system 100 on the module, the module can meet the requirements of miniature design and can also make the field of view of the module larger, thereby making the module highly practical.

[0155] The present invention also provides an electronic device having the module of the above embodiment.

[0156] An electronic device according to an embodiment of a third aspect of the present invention comprises: a module and a housing, wherein the module is disposed in the housing, and at least a portion of the module protrudes from the housing to acquire an image.

[0157] Thus, by placing the module in the housing, the housing can protect the module, so that the module can stably take pictures. In addition, by at least part of the module protruding from the housing, the module can better capture images, so that the image quality is high. It can be understood that the electronic device can be a mobile phone, an iPad, a tablet computer, etc., which is not limited here.

[0158] According to the electronic device of the embodiment of the present invention, by setting the module inside the electronic device, the photos or videos taken by the electronic device using the module have high quality, and after the module is set on the electronic device with a small volume and thin thickness, it will not affect the overall shape of the electronic device.

[0159] Other structures and operations of the optical imaging system 100, modules and electronic devices according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0160] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0161] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An optical imaging system, characterized in that: There are four lenses with refractive power, including: A first lens having negative refractive power, wherein an object-side surface of the first lens is convex at a near optical axis, and an image-side surface of the first lens is concave at the near optical axis; A prism for redirecting the light path, the prism having a reflecting surface; a second lens, the second lens having refractive power, and an object side surface of the second lens being a convex surface near the optical axis; a third lens having refractive power, and an object side surface of the third lens being a convex surface near the optical axis; a fourth lens having refractive power; The object side surfaces and image side surfaces of the first to fourth lenses are all aspherical surfaces; The optical imaging system satisfies the following conditional formula: 0.1mm -1 <EFL / (TTL21*TTL22)<0.3mm -1 ; Wherein, EFL is the effective focal length of the optical imaging system; TTL21 is the distance from the object side of the first lens to the reflection surface of the prism on the optical axis; TTL22 is the distance from the reflection surface of the prism to the imaging surface on the optical axis; The optical imaging system satisfies the following conditional formula: 0.5 <DL / Imgh<0.8; Wherein, DL is the effective diameter of the aperture; Imgh is the diagonal length of the effective photosensitive area on the imaging surface.

2. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 1 <ETL3 / CTL3<2.5; Wherein, ETL3 is the edge thickness of the effective aperture of the third lens; CTL3 is the thickness of the third lens on the optical axis.

3. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 0.2 <FNO / EFL<0.5; Wherein, FNO is the aperture number of the optical imaging system; EFL is the effective focal length of the optical imaging system.

4. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 0.6 <RAD(AngleS1) / RAD(FOV)<1.6; Among them, RAD(AngleS1) is the radian value of the incident angle of the main light reaching the maximum field of view point passing through the object side of the first lens; RAD(FOV) is the radian value of the maximum field of view angle of the optical imaging system.

5. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: -40 <F1 / EFL<-3.44; Wherein, F1 is the effective focal length of the first lens; EFL is the effective focal length of the optical imaging system.

6. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: 3 <EFL / Imgh<4; Wherein, EFL is the effective focal length of the optical imaging system; Imgh is the diagonal length of the effective photosensitive area on the imaging surface.

7. The optical imaging system according to claim 1, wherein: The optical imaging system satisfies the following conditional formula: FBL / TTL22>0.6; Wherein, FBL is the shortest distance from the image side surface of the fourth lens to the imaging surface; TTL22 is the distance from the reflection surface of the prism to the imaging surface on the optical axis.

8. The optical imaging system according to claim 1, wherein: The optical imaging system also includes an aperture, and the optical imaging system satisfies the following conditional formula: 16mm <DL*FNO<19mm; Wherein, DL is the effective diameter of the aperture; FNO is the aperture number of the optical imaging system.

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

10. An electronic device, characterized in that: The electronic device comprises: a module and a housing, the module is the module according to claim 9, and the module is arranged in the housing.

Images