Optical modules, cameras and electronic devices

Abstract

This application discloses an optical module, a camera, and an electronic device, relating to the field of electronic products. An optical module includes: a lens assembly, a reflective element, and a photosensitive element; the lens assembly has a first light-incident end and a first light-exit end disposed opposite to each other along the optical axis; the reflective element has a second light-incident end, a second light-exit end, and a reflective surface, the second light-incident end being disposed opposite to the first light-exit end, the reflective surface reflecting light incident from the second light-incident end to the second light-exit end, the second light-exit end being disposed opposite to the photosensitive element, and the light-exit direction of the second light-exit end deviating from the optical axis. This application can solve problems such as the increased size of the camera in the Y-direction encroaching on the main display area of ​​the screen.

Description

Technical Field

[0001] This application belongs to the technical field of electronic products, specifically relating to an optical module, a camera, and an electronic device. Background Technology

[0002] With the widespread use of electronic devices (such as smartphones), photography functions have become increasingly important and have become a key factor for consumers when making purchasing decisions.

[0003] To further improve image quality, the imaging surface of cameras has become increasingly larger, leading to a corresponding increase in the size of the image sensor. This further increases the space occupied by the camera within electronic devices, especially in the Y-axis (i.e., the vertical direction of the electronic device). Consequently, the display opening corresponding to the camera is shifted downwards, causing it to gradually move down from the top bezel and encroach on the main display area, ultimately affecting the normal display effect. Summary of the Invention

[0004] The purpose of this application is to provide an optical module, camera, and electronic device that can solve problems such as the increased size of the camera in the Y direction encroaching on the main display area of ​​the screen.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides an optical module, including: a lens assembly, a reflective element, and a photosensitive element; The lens assembly has a first light-incident end and a first light-outcident end arranged opposite to each other along the optical axis. The reflective element has a second light-incident end, a second light-outcident end, and a reflective surface. The second light-incident end is disposed opposite to the first light-outcident end. The reflective surface is used to reflect the light incident from the second light-incident end to the second light-outcident end. The second light-outcident end is disposed opposite to the photosensitive element, and the light-outcident direction of the second light-outcident end is deviated from the optical axis direction.

[0006] This application also provides a camera, including the optical module described above.

[0007] This application also provides an electronic device, including: a device body, and the aforementioned optical module or the aforementioned camera; The main body of the device includes a display screen, and an opening is provided on the edge area of ​​one end of the display screen; The optical module is located inside the main body of the device, and the first light-incident end is positioned opposite to the opening.

[0008] In this embodiment, external light enters the lens assembly through the first light-incident end and then enters the second light-incident end through the first light-outcident end. The light then enters the reflective element, is reflected by the reflective surface, and propagates to the second light-outcident end. From there, it propagates to the photosensitive element, achieving an imaging effect. Therefore, in this embodiment, the light-out direction of the second light-outcident end of the reflective element deviates from the optical axis, changing the direction of light propagation after reflection and preventing it from traveling along the optical axis. Compared to related technologies where the photosensitive element is positioned perpendicular to the optical axis, this embodiment changes the position of the photosensitive element, allowing its edge to move further away from the edge of the electronic device's display screen. This further allows the optical module to be closer to the edge of the display screen, mitigating the problem of increased distance between the optical module and the display screen edge due to the larger photosensitive element occupying space near the screen edge. Therefore, it effectively alleviates the problem of the opening on the display screen opposite the optical module encroaching on the main display area and affecting the display effect. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of the optical module disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the optical module in Embodiment 1 disclosed in this application; Figure 3 This is a schematic diagram of the axial chromatic difference corresponding to the optical module in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the defocus MTF corresponding to the optical module in Embodiment 1 disclosed in this application; Figure 5 This is a schematic diagram of the optical module in Embodiment 2 disclosed in this application; Figure 6 This is a schematic diagram of the axial chromatic difference corresponding to the optical module in Embodiment 2 of this application; Figure 7 This is a schematic diagram of the defocus MTF corresponding to the optical module in Embodiment 2 disclosed in this application; Figure 8 This is a schematic diagram of the optical module in Embodiment 3 disclosed in this application; Figure 9 This is a schematic diagram of the axial chromatic difference corresponding to the optical module in Embodiment 3 of this application; Figure 10 This is a schematic diagram of the defocus MTF corresponding to the optical module in Embodiment 3 of this application; Figure 11This is a schematic diagram of an electronic device disclosed in an embodiment of this application.

[0010] Explanation of reference numerals in the attached figures: 01-Optical Module; 10-Lens assembly; 10a-First light-incident end; 10b-First light-outceasing end; 11-First lens; 12-Second lens; 13-Third lens; 14-Fourth lens; 15-Fifth lens; 16-Sixth lens; 20-Reflective element; 20a-Second light-incident end; 20b-Second light-out end; 20c-Reflective surface; 21-First light-incident surface; 22-First reflective surface; 23-First light-out surface; 24-Second light-incident surface; 25-Second reflective surface; 26-Third reflective surface; 27-Second light-out surface; 30 - Photosensitive element; 40 - Filter element; 02-Main body of the equipment; 021-Display screen; 0211-Opening. Detailed Implementation

[0011] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0012] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0013] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0014] In some related technologies, cameras increase the size of their photosensitive chip (i.e., photosensitive element) to improve image quality. Since the camera lens is positioned at the top edge of the display screen, and the light-receiving surface of the photosensitive chip is perpendicular to the optical axis of the lens, increasing the photosensitive chip size necessitates moving the camera away from the top edge (i.e., in the Y direction) to avoid assembly interference. This increases the distance between the lens and the top edge. Consequently, the opening at the top of the display screen opposite the lens needs to be moved downwards, causing the opening to encroach on the main display area and affecting the display's performance.

[0015] Based on the above, this application discloses an optical module 01, with reference to... Figures 1 to 11 The disclosed optical module 01 includes a lens assembly 10, a reflective element 20, and a photosensitive element 30.

[0016] The lens assembly 10 is used to receive and transmit ambient light, enabling the light to propagate towards the photosensitive element 30. The lens assembly 10 may have a first light-incident end 10a and a first light-exit end 10b, which are arranged opposite to each other along the optical axis of the optical module 01. This allows ambient light to enter the lens assembly 10 through the first light-incident end 10a, propagate within the lens assembly 10, and finally exit the lens assembly 10 through the first light-exit end 10b. Furthermore, the lens assembly 10 can process the incoming light, such as by converging or diverging it, to ensure that the light emitted through the first light-exit end 10b meets the subsequent imaging requirements.

[0017] The reflective element 20 is located at the first light-emitting end 10b of the lens assembly 10. It is used to receive light emitted from the lens assembly 10 and reflect the light to change the direction and path of light propagation.

[0018] The reflective element 20 includes a second light-incident end 20a, a second light-outcident end 20b, and a reflective surface 20c. The second light-incident end 20a is disposed opposite to the first light-outcident end 10b to receive light rays transmitted from the first light-outcident end 10b and to transmit the light rays into the reflective element 20 via the second light-incident end 20a. The reflective surface 20c is used to reflect the light rays incident on the second light-incident end 20a to the second light-outcident end 20b, so that the light rays change their propagation direction and propagation path under the reflection of the reflective surface 20c. The second light-outcident end 20b is disposed opposite to the photosensitive element 30 so that the light rays transmitted through the second light-outcident end 20b reach the photosensitive element 30, thereby enabling imaging under the action of the photosensitive element 30.

[0019] Considering that the propagation direction and path of the light after reflection by the reflective surface 20c are changed, the light output direction of the second light output end 20b is deviated from the optical axis direction, so that the light with changed propagation direction and path after reflection can be transmitted through the second light output end 20b.

[0020] Optionally, the optical module 01 may also include a filter element 40, which is disposed between the second light-emitting end 20b of the reflective element 20 and the photosensitive element 30 to perform a filtering function.

[0021] Based on the above configuration, in this embodiment, external light can enter the lens assembly 10 through the first light-incident end 10a, and then enter the second light-incident end 20a via the first light-outcident end 10b. This light then enters the reflective element 20, is reflected by the reflective surface 20c, and propagates to the second light-outcident end 20b. From there, it propagates to the photosensitive element 30, achieving an imaging effect under the action of the photosensitive element 30. Therefore, in this embodiment, the light-out direction of the second light-outcident end 20b of the reflective element 20 deviates from the optical axis, changing the direction of light propagation after reflection by the reflective element 20, preventing the light from propagating along the optical axis.

[0022] Compared to related technologies where the photosensitive element 30 is positioned perpendicular to the optical axis, this embodiment can change the position of the photosensitive element 30. This allows the edge of the photosensitive element 30 to be moved away from the edge of the electronic device display screen 021, and further allows the optical module 01 to be moved closer to the edge of the display screen 021. This alleviates the problem of the increased distance between the optical module 01 and the edge of the display screen 021 due to the increased size of the photosensitive element 30 occupying space near the edge of the display screen 021 inside the electronic device. Therefore, it can effectively alleviate the problem of the opening 0211 on the display screen 021, which is opposite to the optical module 01, moving down and encroaching on the main display area of ​​the display screen 021, thus affecting the display effect.

[0023] Optionally, the reflecting element 20 can be a prism, which includes at least a triangular prism. For example, the triangular prism can be an isosceles right-angled triangular prism or a non-isosceles right-angled triangular prism. In addition, the triangular prism can also be a non-right-angled triangular prism, etc. The specific form of the reflecting element 20 is not limited as long as it can achieve the propagation and reflection of light.

[0024] refer to Figure 2 and Figure 5In some embodiments, the reflective element 20 may include a first light-incident surface 21, a first reflective surface 22, and a first light-emitting surface 23. The first light-incident surface 21 is disposed opposite to the second light-incident end 20a, so that light rays transmitted via the second light-incident end 20a can enter the first light-incident surface 21 and then be transmitted to the reflective element 20 via the first light-incident surface 21. Of course, in other embodiments, the first light-incident surface 21 may also be considered as the second light-incident end 20a.

[0025] Furthermore, the first light-incident surface 21 is perpendicular to the optical axis direction so that the light emitted from the lens assembly 10 can enter the first light-incident surface 21 perpendicularly.

[0026] The first reflecting surface 22 can serve as the reflecting surface 20c. Considering that the first reflecting surface 22 can reflect light, it alters the direction and path of light propagation. In this embodiment, the angle between the incident light direction and the emitting light direction of the first reflecting surface 22 can be equal to 90°. The incident light direction of the first reflecting surface 22 is parallel to the optical axis. Thus, the direction and path of light propagation can be perpendicularly changed through the first reflecting surface 22.

[0027] Of course, the angle between the incident light direction and the emitting light direction of the first reflecting surface 22 can also be greater than 90°. This method can also change the propagation direction and path of light. For example, the above-mentioned angle can be 100°, 120°, etc., and of course, it can also be other degrees, which can be set according to the imaging requirements.

[0028] The first light-emitting surface 23 and the second light-emitting end 20b are disposed opposite to each other so that light emitted through the second light-emitting surface 27 can propagate to the photosensitive element 30 through the second light-emitting end 20b. Of course, in other embodiments, the first light-emitting surface 23 can also be regarded as the second light-emitting end 20b.

[0029] Furthermore, the angle between the light-emitting directions of the first light-emitting surface 23 and the first reflective surface 22 can be less than or equal to 90°. For example, the light-emitting directions of the first light-emitting surface 23 and the first reflective surface 22 can be perpendicular, so that the light reflected by the first reflective surface 22 can be transmitted perpendicularly through the first light-emitting surface 23.

[0030] In some more specific embodiments, the reflective element 20 can be an isosceles right-angled triangular prism. In this case, the face containing one right-angled side is the first light-incident surface 21, the face containing the other right-angled side is the first light-outcrystal surface 23, and the face containing the hypotenuse is the first reflective surface 22. Thus, the angle between the light-incident direction and the light-outcrystal direction of the first reflective surface 22 can be 90° to vertically change the propagation direction and propagation path of the light.

[0031] In the above embodiment, the reflecting element 20 is an isosceles right-angled triangular prism. After the light enters the isosceles right-angled triangular prism along the optical axis, it is reflected once at the first reflecting surface 22 and then emitted. In this case, the image plane is parallel to the plane containing the other right-angled side of the isosceles right-angled triangular prism.

[0032] refer to Figure 8 In other embodiments, the reflective element 20 may further include a second light-incident surface 24, a second reflective surface 25, a third reflective surface 26, and a second light-emitting surface 27. The second light-incident surface 24 is disposed opposite to the second light-incident end 20a, so that light transmitted via the second light-incident end 20a can enter the second light-incident surface 24 and be transmitted to the reflective element 20 via the second light-incident surface 24. Of course, in other embodiments, the second light-incident surface 24 can also be considered as the second light-incident end 20a.

[0033] Furthermore, the second light-incident surface 24 is perpendicular to the optical axis direction so that the light emitted from the lens assembly 10 can enter the second light-incident surface 24 perpendicularly.

[0034] The second reflecting surface 25 and the third reflecting surface 26 together form a reflecting surface 20c, so that light entering the reflecting element 20 can be reflected twice by the second reflecting surface 25 and the third reflecting surface 26. The angle between the incident light direction and the emitting light direction of the second reflecting surface 25 can be greater than 90°, and the incident light direction of the second reflecting surface 25 is parallel to the optical axis. The angle between the emitting light direction of the third reflecting surface 26 and the emitting light direction of the second reflecting surface 25 can be less than 90°, and the emitting light direction of the second emitting surface 27 is perpendicular to the emitting light direction of the third reflecting surface 26.

[0035] Based on the above configuration, the light emitted from the lens assembly 10 can be vertically transmitted to the reflective element 20 via the second light-incident surface 24, and then reflected by the second reflective surface 25. The reflected light propagates to the third reflective surface 26, and is reflected by the third reflective surface 26, and then propagates to the second light-out surface 27. After exiting the second light-out surface 27, it reaches the photosensitive element 30, so as to achieve imaging under the action of the photosensitive element 30.

[0036] For example, the angle between the incident light direction and the emitting light direction of the second reflecting surface 25 can be 100°, 120°, 135°, etc., and of course, it can also be other degrees, which is not specifically limited here; the angle between the incident light direction and the emitting light direction of the third reflecting surface 26 can be 80°, 75°, 60°, etc., and of course, it can also be other degrees, which is not specifically limited here.

[0037] The second light-emitting surface 27 is disposed opposite to the second light-emitting end 20b, so that light emitted through the second light-emitting surface 27 can propagate to the photosensitive element 30 through the second light-emitting end 20b. Of course, in other embodiments, the second light-emitting surface 27 can also be regarded as the second light-emitting end 20b.

[0038] In some more specific embodiments, the reflective element 20 can be a non-isosceles right-angled triangular prism, wherein the face containing the shorter right-angled side is the second light-incident surface 24, the face containing the longer right-angled side is the third reflective surface 26, a portion of the face containing the hypotenuse is the second reflective surface 25, and another portion of the face containing the hypotenuse is the second light-emitting surface 27. In this case, the photosensitive element 30 is positioned opposite to the other portion of the face containing the hypotenuse to receive light.

[0039] In the above embodiment, the reflecting element 20 is a non-isosceles right-angled triangular prism. After the light enters the non-isosceles right-angled triangular prism along the optical axis, it undergoes a first reflection at the second reflecting surface 25 and a second reflection at the third reflecting surface 26 before being transmitted out. In this case, the image plane is parallel to the plane containing the hypotenuse of the non-isosceles right-angled triangular prism.

[0040] In some embodiments, the lens assembly 10 may include a plurality of lenses arranged sequentially along the optical axis to transmit light through each lens and thereby change the propagation characteristics of the light accordingly. Exemplarily, the number of lenses may be two, three, five, six, eight, etc., and can be set according to actual needs.

[0041] The lens located at the end furthest from the reflecting element 20 can have a negative optical power. In this way, when light passes through the lens, the lens can diverge the light, thereby increasing the light propagation area and improving the uniformity of light distribution.

[0042] In addition, the lens located near the end of the reflective element 20 can have positive optical power. In this way, when light passes through the lens, the lens can converge the light to reduce the spot size and enhance the light quality. This is beneficial to improving the light collection efficiency of the subsequent photosensitive element 30, reducing background noise interference, and having a better effect on optimizing image clarity.

[0043] refer to Figure 2 , Figure 5 and Figure 8In some embodiments, the multiple lenses may include a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16, and the first lens 11, the second lens 12, the third lens 13, the fourth lens 14, the fifth lens 15, and the sixth lens 16 are arranged sequentially from the first light-incident end 10a to the first light-outceasing end 10b. In this way, light can be transmitted sequentially through the six lenses to change the propagation form of the light, thereby obtaining light with the desired characteristics.

[0044] The first lens 11 can have negative optical power, the second lens 12 can have positive optical power, the fifth lens 15 can have negative optical power, and the sixth lens 16 can have positive optical power. In this way, the first lens 11 can diverge the light, the second lens 12 can converge the light, the third lens 13 and the fourth lens 14 can transmit the light respectively, the fifth lens 15 can diverge the light, and the sixth lens 16 can converge the light, so that the desired form and characteristics of light can be obtained.

[0045] Furthermore, the light-emitting surface of the first lens 11 can be a concave surface that is recessed toward the first light-incident end 10a, the light-emitting surface of the fifth lens 15 can be a convex surface that is raised toward the first light-emitting end 10b, and the light-emitting surface of the sixth lens 16 is disposed opposite to the first light-emitting end 10b, and the light-emitting surface of the sixth lens 16 can be a convex surface that is raised away from the first light-incident end 10a.

[0046] Based on the above configuration, the light-emitting surface of the first lens 11 can diverge the light, the light-emitting surface of the fifth lens 15 can converge the light, and the light-emitting surface of the sixth lens 16 can converge the light.

[0047] refer to Figure 2In some more specific embodiments, the light-incident surface of the first lens 11 is disposed opposite to the first light-incident end 10a, and the light-incident surface of the first lens 11 can be a concave surface recessed towards the first light-outceasing end 10b; the light-incident surface of the second lens 12 can be a convex surface protruding towards the first light-incident end 10a, and the light-outceasing surface of the second lens 12 can be a concave surface recessed towards the first light-incident end 10a; the light-incident surface of the third lens 13 can be a concave surface recessed towards the first light-outceasing end 10b, and the light-outceasing surface of the third lens 13 can be a convex surface protruding towards the first light-outceasing end 10b. The light-incident surface of the fourth lens 14 can be a convex surface or a flat surface that protrudes towards the first light-incident end 10a, and the light-exiting surface of the fourth lens 14 can be a convex surface that protrudes towards the first light-exiting end 10b; the light-incident surface of the fifth lens 15 can be a concave surface that is recessed towards the first light-exiting end 10b, and the light-exiting surface of the fifth lens 15 can be a convex surface that protrudes towards the first light-exiting end 10b; the light-incident surface of the sixth lens 16 can be a convex surface that protrudes towards the first light-incident end 10a, and the light-exiting surface of the sixth lens 16 can be a convex surface that protrudes away from the first light-incident end 10a.

[0048] Based on the above configuration, light rays entering through the first light-incident end 10a diverge at the light-incident surface of the first lens 11 and enter the first lens 11, then diverge at the light-outcident surface of the first lens 11 and exit the first lens 11; subsequently, light rays converge at the light-incident surface of the second lens 12 and enter the second lens 12, then diverge at the light-outcident surface of the second lens 12 and exit the second lens 12; subsequently, light rays diverge at the light-incident surface of the third lens 13 and enter the third lens 13, then converge at the light-outcident surface of the third lens 13 and exit the third lens 13; subsequently, light rays enter through the fourth light-incident end 10a... The light rays converge or directly transmit at the incident surface of mirror 14 and enter the fourth lens 14, then converge at the exit surface of the fourth lens 14 and exit the fourth lens 14; subsequently, the light rays diverge at the incident surface of the fifth lens 15 and enter the fifth lens 15, then converge at the exit surface of the fifth lens 15 and exit the fifth lens 15; subsequently, the light rays converge at the incident surface of the sixth lens 16 and enter the sixth lens 16, then converge at the exit surface of the sixth lens 16 and exit the sixth lens 16, finally exiting through the first exit end 10b, so as to be subsequently transmitted to the reflective element 20.

[0049] refer to Figure 5In some more specific embodiments, the light-incident surface of the first lens 11 is disposed opposite to the first light-incident end 10a, and the light-incident surface of the first lens 11 can be a plane, and the light-exiting surface of the first lens 11 can be a concave surface recessed towards the first light-incident end 10a; the light-incident surface of the second lens 12 can be a concave surface recessed towards the first light-exiting end 10b, and the light-exiting surface of the second lens 12 can be a convex surface protruding towards the first light-exiting end 10b; the light-incident surface of the third lens 13 can be a concave surface recessed towards the first light-exiting end 10b, and the light-exiting surface of the third lens 13 can be a convex surface protruding towards the first light-incident end 10a. The light-emitting end 10b has a convex surface; the light-incident surface of the fourth lens 14 can be a convex surface or a flat surface that protrudes towards the first light-incident end 10a, and the light-emitting surface of the fourth lens 14 can be a convex surface that protrudes towards the first light-emitting end 10b; the light-incident surface of the fifth lens 15 can be a concave surface that is recessed towards the first light-emitting end 10b, and the light-emitting surface of the fifth lens 15 can be a convex surface that protrudes towards the first light-emitting end 10b; the light-incident surface of the sixth lens 16 can be a convex surface that protrudes towards the first light-incident end 10a, and the light-emitting surface of the sixth lens 16 can be a convex surface that protrudes towards the first light-emitting end 10b.

[0050] Based on the above configuration, light rays entering through the first light-incident end 10a are directly transmitted through and into the first lens 11 at the light-incident surface of the first lens 11, diverge at the light-outceasing surface of the first lens 11, and exit the first lens 11. Subsequently, light rays diverge at the light-incident surface of the second lens 12 and enter the second lens 12, converge at the light-outceasing surface of the second lens 12, and exit the second lens 12. Subsequently, light rays diverge at the light-incident surface of the third lens 13 and enter the third lens 13, converge at the light-outceasing surface of the third lens 13, and exit the third lens 13. Subsequently, light rays at the fourth light-incident surface... The light rays converge or directly transmit at the incident surface of lens 14 and enter the fourth lens 14, then converge at the exit surface of the fourth lens 14 and exit the fourth lens 14; subsequently, the light rays diverge at the incident surface of the fifth lens 15 and enter the fifth lens 15, then converge at the exit surface of the fifth lens 15 and exit the fifth lens 15; subsequently, the light rays converge at the incident surface of the sixth lens 16 and enter the sixth lens 16, then converge at the exit surface of the sixth lens 16 and exit the sixth lens 16, finally exiting through the first exit end 10b, so as to be subsequently transmitted to the reflective element 20.

[0051] refer to Figure 8In some other more specific embodiments, the light-incident surface of the first lens 11 is disposed opposite to the first light-incident end 10a, and the light-incident surface of the first lens 11 can be a convex surface protruding towards the first light-incident end 10a, and the light-exiting surface of the first lens 11 can be a concave surface recessed towards the first light-incident end 10a; the light-incident surface of the second lens 12 can be a concave surface recessed towards the first light-exiting end 10b, and the light-exiting surface of the second lens 12 can be a convex surface protruding towards the first light-exiting end 10b; the light-incident surface of the third lens 13 can be a concave surface recessed towards the first light-exiting end 10b, and the light-exiting surface of the third lens 13 can be a convex surface protruding towards the first light-exiting end 10b. The light-emitting surface can be a convex surface that protrudes towards the first light-emitting end 10b; the light-incident surface of the fourth lens 14 can be a concave surface that is recessed towards the first light-emitting end 10b, and the light-emitting surface of the fourth lens 14 can be a convex surface that protrudes towards the first light-emitting end 10b; the light-incident surface of the fifth lens 15 can be a concave surface that is recessed towards the first light-emitting end 10b, and the light-emitting surface of the fifth lens 15 can be a concave surface that is recessed towards the first light-incident end 10a; the light-incident surface of the sixth lens 16 can be a convex surface that protrudes towards the first light-incident end 10a, and the light-emitting surface of the sixth lens 16 can be a convex surface that protrudes towards the first light-emitting end 10b.

[0052] Based on the above configuration, light rays entering through the first light-incident end 10a converge at the light-incident surface of the first lens 11 and enter the first lens 11, then diverge at the light-outcident surface of the first lens 11 and exit the first lens 11; subsequently, light rays diverge at the light-incident surface of the second lens 12 and enter the second lens 12, then converge at the light-outcident surface of the second lens 12 and exit the second lens 12; subsequently, light rays diverge at the light-incident surface of the third lens 13 and enter the third lens 13, then converge at the light-outcident surface of the third lens 13 and exit the third lens 13; subsequently, light rays... The light diverges at the incident surface of the fourth lens 14 and enters the fourth lens 14, then converges at the exit surface of the fourth lens 14 and exits the fourth lens 14; subsequently, the light diverges at the incident surface of the fifth lens 15 and enters the fifth lens 15, then diverges at the exit surface of the fifth lens 15 and exits the fifth lens 15; subsequently, the light converges at the incident surface of the sixth lens 16 and enters the sixth lens 16, then converges at the exit surface of the sixth lens 16 and exits the sixth lens 16, finally exiting through the first exit end 10b, so as to be subsequently transmitted to the reflective element 20.

[0053] For ease of understanding, the technical terms used in the following embodiments of this application are explained as follows: Focal length (efl) is a measure of the ability of an optical system to focus or diverge light. It refers to the perpendicular distance from the optical center of a lens-lens or lens-lens group to the focal plane when a scene at infinity is imaged in sharp focus by a lens-lens or lens-lens group. From a practical perspective, it can be understood as the distance from the center of the lens (or lens assembly 10) to the image plane.

[0054] Optical power characterizes the ability of a lens to refract an incident parallel beam of light.

[0055] The field of view (FOV) is the angle between the two edges of the lens, representing the maximum area through which the image of the subject can be captured. The size of the FOV determines the range of the lens's field of view; a larger FOV results in a wider field of view. Half FOV (HFOV) refers to half the FOV.

[0056] Aperture is a device used to control the amount of light passing through the lens into an electronic device. It is usually expressed inside the lens using the F# value.

[0057] Aperture number F# is a relative value derived from the lens's focal length and the lens's light-gathering diameter (the reciprocal of the relative aperture). The smaller the aperture number F#, the more light enters the lens in the same unit of time, resulting in a shallower depth of field. This will blur the background content in the photo, producing an effect similar to that of a telephoto lens.

[0058] The object side is the side of the lens where the object is being photographed, and the side of the lens facing the object side is the object side of the lens; the image side is the side of the lens where the image of the object is being photographed, and the side of the lens facing the image side is the image side.

[0059] The chip (i.e., the photosensitive element 30) has an imaging surface and acts as a light receiver. Object-side light rays are refracted by the imaging lens and imaged onto the chip.

[0060] Optionally, the surface shape of the above lens can be an even-order aspherical surface, satisfying the aspherical formula describing the aspherical surface:

[0061] Where c = 1 / R, i.e., the curvature corresponding to the radius; r is the perpendicular distance from a point on the optical surface to the optical axis; z represents the sag of the point along the optical axis; k is the quadratic curve coefficient of the surface; and Ai represents the i-th order aspherical coefficient.

[0062] Based on the constraints, some embodiments of the condition boundary are as follows: Example 1: refer to Figure 2 The lens assembly 10 includes six aspherical lenses, namely a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 arranged sequentially from the object side to the image side along the optical axis. The first lens 11 has negative optical power and its image-side surface is concave; the second lens 12 has positive optical power; the fifth lens 15 has negative optical power and its image-side surface is convex; and the sixth lens 16 has positive optical power and both its object-side and image-side surfaces are convex.

[0063] The reflecting element 20 is an isosceles right-angled triangular prism. After the light enters the isosceles right-angled triangular prism along the optical axis, it is reflected once by the isosceles right-angled triangular prism and then exits. The side of the image is parallel to the exiting right-angled surface of the isosceles right-angled triangular prism.

[0064] The basic specifications achieved in Example 1 are shown in Table 1-1.

[0065]

[0066] Where eFL is the system focal length, F# is the system aperture, and the total length is the length of the optical system (i.e., optical module 01) along the optical axis.

[0067] Table 1-2 shows the surface type, radius of curvature, thickness, refractive index, and Abbe number of each lens in optical module 01 in Example 1.

[0068]

[0069] Table 1-3 shows the aspherical higher-order coefficients of each lens surface in Example 1.

[0070]

[0071] In Example 1, the axial color difference is as follows: Figure 3 As shown, the out-of-focus MTF is as follows Figure 4 As shown in the diagram, the five curves in the axial chromatic aberration diagram represent wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, indicating that the axial chromatic aberration of the lens module in Example 1 is controlled within a very small range, with good chromatic aberration convergence. The defocus MTF diagram shows that at a spatial frequency of 89 lp / mm, the full-field MTF is greater than 0.4, indicating high resolution.

[0072] Example 2: refer to Figure 5 The lens assembly 10 includes six aspherical lenses, namely a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 arranged sequentially from the object side to the image side along the optical axis. The first lens 11 has negative optical power, its object side is flat (i.e., its curvature is 0), and its image side is concave. The second lens 12 has positive optical power. The fifth lens 15 has negative optical power, and its image side is convex. The sixth lens 16 has positive optical power, and both its object side and image side are convex.

[0073] The reflecting element 20 is an isosceles right-angled triangular prism. After light enters the isosceles right-angled triangular prism along the optical axis, it is reflected once by the isosceles right-angled triangular prism and then exits. The image side is parallel to the exit right-angled surface of the isosceles right-angled triangular prism. The main difference between Embodiment 2 and Embodiment 1 is that the object side of the first lens 11 in Embodiment 2 is a plane. This design allows the first lens 11 to fit against the plane inside the display screen 021, which is beneficial for further reducing the Z-axis dimension of the optical module 01.

[0074] The basic specifications achieved in Example 2 are shown in Table 2-1.

[0075]

[0076] Where eFL is the system focal length, F# is the system aperture, and the total length is the length of the optical system (i.e., optical module 01) along the optical axis.

[0077] Table 2-2 shows the surface type, radius of curvature, thickness, refractive index, and Abbe number of each lens in optical module 01 in Example 2.

[0078]

[0079] Table 2-3 shows the aspherical higher-order coefficients of each lens surface in Example 2.

[0080]

[0081] In Example 2, the axial color difference is as follows: Figure 6 As shown, the out-of-focus MTF is as follows Figure 7 As shown in the diagram, the five curves in the axial chromatic aberration diagram represent wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm, respectively. This indicates that the axial chromatic aberration of the lens module in Example 1 is controlled within a very small range, with good chromatic aberration convergence. The defocus MTF diagram shows that at a spatial frequency of 89 lp / mm, the full-field MTF is greater than 0.35, indicating high resolution.

[0082] Example 3: refer to Figure 8 The lens assembly 10 includes six aspherical lenses, namely a first lens 11, a second lens 12, a third lens 13, a fourth lens 14, a fifth lens 15, and a sixth lens 16 arranged sequentially from the object side to the image side along the optical axis. The first lens 11 has negative optical power and its image-side surface is concave; the second lens 12 has positive optical power; the fifth lens 15 has negative optical power and its image-side surface is convex; and the sixth lens 16 has positive optical power and both its object-side and image-side surfaces are convex.

[0083] The reflecting element 20 is a non-isosceles right-angled triangular prism. After the light enters the non-isosceles right-angled triangular prism along the optical axis, it is reflected twice by the non-isosceles right-angled triangular prism and then exits. The side of the image is parallel to the plane containing the hypotenuse of the non-isosceles right-angled triangular prism.

[0084] The basic specifications achieved in Example 3 are shown in Table 3-1.

[0085]

[0086] Where eFL is the system focal length, F# is the system aperture, and the total length is the length of the optical system (i.e., optical module 01) along the optical axis.

[0087] Table 3-2 shows the surface type, radius of curvature, thickness, refractive index, and Abbe number of each lens in optical module 01 in Example 3.

[0088]

[0089] Table 3-3 shows the aspherical higher-order terms coefficients of each lens surface in Example 3.

[0090]

[0091] In Example 3, the axial color difference is as follows: Figure 9 As shown, the out-of-focus MTF is as follows Figure 10 As shown, the five curves in the axial chromatic aberration diagram, representing wavelengths of 650nm, 610nm, 555nm, 510nm, and 470nm respectively, indicate that the axial chromatic aberration of the lens module in Example 1 is controlled within a very small range, with good chromatic aberration convergence. The defocus MTF diagram shows that at a spatial frequency of 89 lp / mm, the full-field MTF is greater than 0.3, indicating basic resolution.

[0092] Based on the aforementioned optical module 01, this application also discloses a camera, which includes the aforementioned optical module 01. Optionally, the camera can be disposed on the front side of an electronic device; in this case, the camera can serve as a front-facing camera of the electronic device. For example, the camera can serve as a front-facing camera of electronic devices such as mobile phones, tablets, and game consoles.

[0093] Alternatively, the aforementioned camera can be a periscope camera.

[0094] Based on the aforementioned optical module 01, this application also discloses an electronic device, which includes a device body 02 and the aforementioned optical module 01, or includes the aforementioned camera. Optionally, the electronic device can be a mobile phone, tablet computer, game console, or other similar products.

[0095] The device body 02 may include a display screen 021, and an opening 0211 may be provided on the edge area of ​​one end of the display screen 021; the optical module 01 is disposed in the device body 02, and the first light-incident end 10a of the optical module 01 is disposed opposite to the opening 0211.

[0096] Based on the above settings, external light can enter the optical module 01 through the opening 0211, so that imaging can be achieved under the action of the optical module 01.

[0097] In this embodiment, by adding a reflective element 20, the direction and path of light propagation are changed, and the position of the photosensitive element 30 is adjusted accordingly. Even if a large-sized photosensitive element 30 is used, there will be no assembly interference at the edge of the photosensitive element 30. This allows the entire optical module 01 to be closer to the edge of one end of the display screen 021, which helps to reduce the distance between the opening 0211 corresponding to the optical module 01 and the edge of one end of the display screen 021. As a result, the opening 0211 no longer moves down and encroaches on the main display area, thus improving the display effect of the display screen 021.

[0098] In summary, by adding a reflective element 20, the embodiment of this application changes the direction and path of light propagation, which helps to reduce the size of the optical module 01 in the Y direction of the electronic device. This allows the position of the optical module 01 to be closer to one edge of the display screen 021, alleviating the problem of the opening 0211 corresponding to the optical module 01 moving down and encroaching on the main display area of ​​the display screen 021, thereby improving the display effect of the display screen 021.

[0099] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An optical module, characterized in that, include: Lens assembly (10), reflective element (20) and photosensitive element (30); The lens assembly (10) has a first light-incident end (10a) and a first light-outcident end (10b) arranged opposite to each other along the optical axis. The reflective element (20) has a second light-incident end (20a), a second light-outcident end (20b) and a reflective surface (20c). The second light-incident end (20a) is disposed opposite to the first light-outcident end (10b). The reflective surface (20c) is used to reflect the light incident from the second light-incident end (20a) to the second light-outcident end (20b). The second light-outcident end (20b) is disposed opposite to the photosensitive element (30), and the light-out direction of the second light-outcident end (20b) is deviated from the optical axis direction.

2. The optical module according to claim 1, characterized in that, The reflective element (20) includes a first light-incident surface (21), a first reflective surface (22), and a first light-exiting surface (23); The first light-incident surface (21) is disposed opposite to the second light-incident end (20a), and the first light-incident surface (21) is perpendicular to the optical axis direction; The first reflecting surface (22) is the reflecting surface (20c), and the angle between the incident light direction and the emitting light direction of the first reflecting surface (22) is greater than or equal to 90°, and the incident light direction is parallel to the optical axis direction; The first light-emitting surface (23) is disposed opposite to the second light-emitting end (20b), and the angle between the light-emitting direction of the first light-emitting surface (23) and the first reflective surface (22) is less than or equal to 90°.

3. The optical module according to claim 1, characterized in that, The reflective element (20) includes a second light-incident surface (24), a second reflective surface (25), a third reflective surface (26), and a second light-out surface (27); The second light-incident surface (24) is disposed opposite to the second light-incident end (20a), and the second light-incident surface (24) is perpendicular to the optical axis direction; The second reflective surface (25) and the third reflective surface (26) together form the reflective surface (20c). The angle between the incident light direction of the second reflective surface (25) and the light emitting direction of the second reflective surface (25) is greater than 90°. The incident light direction of the second reflective surface (25) is parallel to the optical axis direction. The angle between the light emitting direction of the third reflective surface (26) and the light emitting direction of the second reflective surface (25) is less than 90°. The second light emitting surface (27) is arranged opposite to the second light emitting end (20b), and the light emitting surface (27) is perpendicular to the light emitting direction of the third reflective surface (26).

4. The optical module according to any one of claims 1 to 3, characterized in that, The reflective element (20) is a prism, wherein the prism comprises at least a triangular prism.

5. The optical module according to claim 2 or 3, characterized in that, The lens assembly (10) includes a plurality of lenses, which are arranged sequentially along the optical axis. The lens located at the end furthest from the reflective element (20) has negative optical power; The lens located near one end of the reflective element (20) has positive optical power.

6. The optical module according to claim 5, characterized in that, The plurality of lenses include a first lens (11), a second lens (12), a third lens (13), a fourth lens (14), a fifth lens (15) and a sixth lens (16) arranged sequentially from the first light-incident end (10a) to the first light-outceasing end (10b). The first lens (11) has negative optical power, the second lens (12) has positive optical power, the fifth lens (15) has negative optical power, and the sixth lens (16) has positive optical power.

7. The optical module according to claim 6, characterized in that, The light-emitting surface of the first lens (11) is a concave surface that is recessed toward the first light-incident end (10a); The light-emitting surface of the fifth lens (15) is a convex surface that protrudes toward the first light-emitting end (10b); The light-emitting surface of the sixth lens (16) is disposed opposite to the first light-emitting end (10b), and the light-emitting surface of the sixth lens (16) is a convex surface that protrudes toward the first light-emitting end (10b).

8. The optical module according to claim 7, characterized in that, The light-incident surface of the first lens (11) is disposed opposite to the first light-incident end (10a), and the light-incident surface of the first lens (11) is a concave surface that is recessed toward the first light-outceasing end (10b), and the light-outceasing surface of the first lens (11) is a concave surface that is recessed toward the first light-incident end (10a). The light-incident surface of the second lens (12) is a convex surface that protrudes toward the first light-incident end (10a), and the light-exit surface of the second lens (12) is a concave surface that is recessed toward the first light-incident end (10a). The light-incident surface of the third lens (13) is a concave surface that is recessed toward the first light-out end (10b), and the light-out surface of the third lens (13) is a convex surface that is protruding toward the first light-out end (10b). The light-incident surface of the fourth lens (14) is a convex surface or a flat surface that protrudes toward the first light-incident end (10a), and the light-exiting surface of the fourth lens (14) is a convex surface that protrudes toward the first light-exiting end (10b). The light-incident surface of the fifth lens (15) is a concave surface that is recessed toward the first light-out end (10b); The light-incident surface of the sixth lens (16) is a convex surface that protrudes toward the first light-incident end (10a).

9. The optical module according to claim 7, characterized in that, The light-incident surface of the first lens (11) is disposed opposite to the first light-incident end (10a), and the light-incident surface of the first lens (11) is a plane, and the light-exit surface of the first lens (11) is a concave surface that is recessed toward the first light-incident end (10a). The light-incident surface of the second lens (12) is a concave surface that is recessed toward the first light-out end (10b), and the light-out surface of the second lens (12) is a convex surface that is protruding toward the first light-out end (10b). The light-incident surface of the third lens (13) is a concave surface that is recessed toward the first light-out end (10b), and the light-out surface of the third lens (13) is a convex surface that is protruding toward the first light-out end (10b). The light-incident surface of the fourth lens (14) is a convex surface or a flat surface that protrudes toward the first light-incident end (10a), and the light-exiting surface of the fourth lens (14) is a convex surface that protrudes toward the first light-exiting end (10b). The light-incident surface of the fifth lens (15) is a concave surface that is recessed toward the first light-outcrystal end (10b), and the light-outcrystal surface of the fifth lens (15) is a convex surface that is protruding toward the first light-outcrystal end (10b). The light-incident surface of the sixth lens (16) is a convex surface that protrudes toward the first light-incident end (10a), and the light-exiting surface of the sixth lens (16) is a convex surface that protrudes toward the first light-exiting end (10b).

10. The optical module according to claim 7, characterized in that, The light-incident surface of the first lens (11) is disposed opposite to the first light-incident end (10a), and the light-incident surface of the first lens (11) is a convex surface that protrudes toward the first light-incident end (10a). The light-incident surface of the second lens (12) is a concave surface that is recessed toward the first light-out end (10b), and the light-out surface of the second lens (12) is a convex surface that is protruding toward the first light-out end (10b). The light-incident surface of the third lens (13) is a concave surface that is recessed toward the first light-out end (10b), and the light-out surface of the third lens (13) is a convex surface that is protruding toward the first light-out end (10b). The light-incident surface of the fourth lens (14) is a concave surface that is recessed toward the first light-out end (10b), and the light-out surface of the fourth lens (14) is a convex surface that is protruding toward the first light-out end (10b). The light-incident surface of the fifth lens (15) is a concave surface that is recessed toward the first light-out end (10b); The light-incident surface of the sixth lens (16) is a convex surface that protrudes toward the first light-incident end (10a).

11. A camera, characterized in that, include: The optical module (01) according to any one of claims 1 to 10.

12. An electronic device, characterized in that, include: The device body (02), and the optical module (01) as described in any one of claims 1 to 10 or the camera as described in claim 11; The main body of the device (02) includes a display screen (021), and an opening (0211) is provided on the edge area of ​​one end of the display screen (021). The optical module (01) is located inside the main body (02) of the device, and the first light-incident end (10a) is arranged opposite to the opening (0211).

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