An adjustable light beam angle camera auxiliary lighting distribution structure and mobile terminal

Abstract

The application belongs to the technical field of optical equipment, and discloses a camera auxiliary lighting distribution structure capable of adjusting the angle of a light beam and a mobile terminal, wherein the camera auxiliary lighting distribution structure capable of adjusting the angle of the light beam comprises: a light source assembly comprising at least one emitting light source for emitting a first light beam; a first lens group arranged on one side of the light source assembly along an optical axis direction, the first lens group being used for converging the first light beam and emitting a second light beam; a second lens group arranged on one side of the first lens group away from the light source assembly along the optical axis direction, the second lens group being used for refracting the second light beam and emitting a third light beam; and a zoom control assembly connected to the second lens group and driving the second lens group to move along the optical axis direction so as to change the beam angle of the third light beam, and / or the zoom control assembly being connected to the first lens group and driving the first lens group to move along the optical axis direction so as to change the beam angle of the third light beam; and the application can solve the technical problem of a large volume of a light source on a mobile phone in the prior art.

Description

Technical Field

[0001] This application belongs to the field of optical equipment technology, specifically relating to a camera auxiliary lighting light distribution structure and mobile terminal with adjustable beam angle. Background Technology

[0002] Currently, most mobile phones and smart terminals use a single-angle illumination source, generally based on the maximum field of view of the camera lens. However, as new mobile phones increasingly utilize wide-angle and telephoto zoom capabilities, achieving zoom levels 3-10 times that of traditional digital cameras, a single-angle light source is insufficient for most applications. Some manufacturers combine multiple LED illumination modules with different angles, selecting different modules for illumination when the camera zooms. However, combining multiple modules increases the overall size of the light source. Utility Model Content

[0003] The purpose of this application is to provide a camera auxiliary lighting light distribution structure and mobile terminal with adjustable beam angle, so as to solve the technical problem of large light source volume on mobile phones in the prior art.

[0004] To achieve the above objectives, an embodiment of the first aspect of this application provides a camera-assisted lighting light distribution structure with adjustable beam angle, comprising: a light source assembly, the light source assembly including at least one emitting light source for emitting a first beam; a first lens group disposed on one side of the light source assembly along the optical axis, the first lens group for converging the first beam and emitting a second beam; a second lens group disposed on the side of the first lens group away from the light source assembly along the optical axis, the second lens group for refracting the second beam and emitting a third beam; a zoom control assembly connected to the second lens group and for driving the second lens group to move along the optical axis to change the beam angle of the third beam; and / or, connected to the first lens group, the zoom control assembly for driving the first lens group to move along the optical axis to change the beam angle of the third beam.

[0005] In some embodiments, the camera-assisted lighting light distribution structure with adjustable beam angle further includes a collimating lens disposed between the light source assembly and the first lens group, and the collimating lens is used to collimate the first beam and direct it toward the first lens group.

[0006] In some embodiments, the collimating lens is a total internal reflection collimating lens. The side of the total internal reflection collimating lens away from the light source assembly along the optical axis is a plane. The side of the total internal reflection collimating lens close to the light source assembly along the optical axis is provided with a refractive body and a plurality of annular reflecting prisms. The axis of the refractive body coincides with the center line of the emitted light source, and the plurality of reflecting prisms are arranged around the refractive body. Alternatively, the collimating lens is one of an aspherical collimating lens, a superlens, and a diffractive optical element.

[0007] In some embodiments, the first lens group includes a plurality of first lens units, which are arranged in an array on a plane perpendicular to the optical axis; the second lens group includes a plurality of second lens units corresponding to the first lens units, which are arranged in an array on a plane perpendicular to the optical axis.

[0008] In some embodiments, the first lens unit is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens; and / or, the second lens unit is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens.

[0009] In some embodiments, a plurality of first lens units are arranged in a rectangular array; a plurality of second lens units are arranged in a rectangular array.

[0010] In some embodiments, a zoom control component is connected to a second lens group, and the zoom control component is used to drive the second lens group to move between a first position and a second position along the optical axis. The distance between the first position and the first lens group is less than the distance between the second position and the first lens group. In the optical axis direction, when the second lens group moves to the first position, the focal length of the first lens group is greater than the distance between the optical center of the first lens group and the second lens group. In the optical axis direction, when the second lens group moves to the second position, the focal length of the first lens group is less than the distance between the optical center of the first lens group and the second lens group.

[0011] In some embodiments, the zoom control assembly includes a voice coil motor and / or a linear motor.

[0012] In some embodiments, the camera-assisted lighting light distribution structure with adjustable beam angle further includes a light-blocking plate disposed between the first lens group and the second lens group. The light-blocking plate is provided with a plurality of light-transmitting holes, each of which corresponds to a plurality of first lens units and a plurality of second lens units.

[0013] In some embodiments, the light-blocking plate is made of black material, and the thickness of the light-blocking plate along the optical axis is less than or equal to 0.2 mm; and / or, the aperture of the light-transmitting hole is less than or equal to 0.3 mm.

[0014] In some embodiments, the light source assembly includes two emitting light sources; the camera-assisted illumination light distribution structure with adjustable beam angle includes two spliced ​​collimating lenses, each corresponding to one of the two emitting light sources.

[0015] The second aspect of this application also provides a mobile terminal, including a camera-assisted lighting light distribution structure with an adjustable beam angle as described in any of the first aspect embodiments.

[0016] The beneficial effects of the adjustable beam angle camera auxiliary lighting distribution structure and mobile terminal provided in this application are as follows: By setting a zoom control component to control the movement of the first lens group and the second lens group along the optical axis, the distance between the first lens group and the second lens group can be changed, thus changing the beam angle of the emitted third beam. This allows for changing the area illuminated by the third beam according to actual needs. The adjustable beam angle camera auxiliary lighting distribution structure can function as a mobile phone flash. During the process of the mobile phone lens zooming to capture different areas, the adjustable beam angle camera auxiliary lighting distribution structure enables the third beam to illuminate the corresponding shooting area. This application uses a single light source to meet the lighting needs of both wide-angle and telephoto lenses in mobile phones, solving the technical problem of large light source size in mobile phones and improving the utilization efficiency of the light source. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a camera-assisted illumination light distribution structure with an adjustable beam angle provided in some embodiments of this application;

[0019] Figure 2 Exploded state isometric view of a camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application;

[0020] Figure 3 An exploded side view of a camera-assisted illumination light distribution structure with an adjustable beam angle provided in some embodiments of this application;

[0021] Figure 4 A schematic diagram of the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application, emitting a light beam. Figure 1 ;

[0022] Figure 5 A schematic diagram of the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application, emitting a light beam. Figure 2 ;

[0023] Figure 6 A schematic diagram of the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application, emitting a light beam. Figure 3 ;

[0024] Figure 7A schematic diagram of the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application, emitting a light beam. Figure 4 ;

[0025] Figure 8 Schematic diagram of a collimating lens provided for some embodiments of this application Figure 1 ;

[0026] Figure 9 This is a schematic diagram of the optical path of light passing through a total internal reflection collimating lens, provided in some embodiments of this application;

[0027] Figure 10 A schematic diagram of a total internal reflection collimating lens provided for some embodiments of this application;

[0028] Figure 11 Schematic diagram of a collimating lens provided for some embodiments of this application Figure 2 ;

[0029] Figure 12 The parameter values ​​of the collimating lens in the lighting device provided in some embodiments of this application are as follows:

[0030] Figure 13 Schematic diagram of a collimating lens provided for some embodiments of this application Figure 3 ;

[0031] Figure 14 for Figure 13 Axonometric view of the collimating lens;

[0032] Figure 15 The parameter value of the collimating lens in the lighting device provided in some embodiments of this application is two;

[0033] Figure 16 Schematic diagram of a collimating lens provided for some embodiments of this application Figure 3 ;

[0034] Figure 17 The parameter values ​​of the collimating lens in the lighting device provided in some embodiments of this application are three;

[0035] Figure 18 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 1 ;

[0036] Figure 19 For light to pass through Figure 18 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0037] Figure 20 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 2 ;

[0038] Figure 21 For light to pass through Figure 20 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0039] Figure 22 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 3 ;

[0040] Figure 23 For light to pass through Figure 22 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0041] Figure 24 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 4 ;

[0042] Figure 25 For light to pass through Figure 24 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0043] Figure 26 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 5 ;

[0044] Figure 27 For light to pass through Figure 26 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0045] Figure 28 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 6 ;

[0046] Figure 29 For light to pass through Figure 28 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0047] Figure 30 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 7 ;

[0048] Figure 31 For light to pass through Figure 30 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0049] Figure 32 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 8 ;

[0050] Figure 33 For light to pass through Figure 32Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0051] Figure 34 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 9 ;

[0052] Figure 35 For light to pass through Figure 34 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0053] Figure 36 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 10 ;

[0054] Figure 37 For light to pass through Figure 36 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0055] Figure 38 Schematic diagram of a first lens unit and a second lens unit provided for some embodiments of this application Figure 10 one;

[0056] Figure 39 For light to pass through Figure 38 Schematic diagram of the optical path of the first lens unit and the second lens unit in the diagram;

[0057] Figure 40 A schematic diagram of a first lens group provided for some embodiments of this application;

[0058] Figure 41 Schematic diagrams of the optical path design of the first lens unit and the second lens unit provided for some embodiments of this application;

[0059] Figure 42 The parameter values ​​of the components in the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application are as follows:

[0060] Figure 43 The parameter values ​​of the components in the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application are as follows:

[0061] Figure 44 The simulation effect of light refraction by the first and second lens groups provided in some embodiments of this application Figure 1 ;

[0062] Figure 45 A schematic diagram of the illuminance of a spot formed by a third beam emitted by a camera-assisted illumination light distribution structure with an adjustable beam angle, provided in some embodiments of this application;

[0063] Figure 46 The simulation effect of light refraction by the first and second lens groups provided in some embodiments of this application Figure 2 ;

[0064] Figure 47 A schematic diagram of the illuminance of a spot formed by a third beam emitted by a camera-assisted illumination light distribution structure with an adjustable beam angle, provided in some embodiments of this application;

[0065] Figure 48 The parameter values ​​of the components in the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application are as follows:

[0066] Figure 49 The parameter values ​​of the components in the camera-assisted illumination light distribution structure with adjustable beam angle provided in some embodiments of this application are as follows:

[0067] Figure 50 A schematic diagram of a collimating lens and light source assembly provided in some embodiments of this application;

[0068] Figure 51 A schematic diagram of two collimating lenses spliced ​​together, provided for some embodiments of this application. Figure 1 ;

[0069] Figure 52 A schematic diagram of the splicing of three collimating lenses provided for some embodiments of this application. Figure 2 .

[0070] The following are the labeling elements in the figure:

[0071] 100. Camera auxiliary lighting light distribution structure with adjustable beam angle;

[0072] 10. Light source assembly; 11. Emitting light source; 12. Support component;

[0073] 20. Collimating lens; 21. Refracting body; 22. Reflecting prism; 221. Incident surface; 222. Reflecting surface; 23. Fifth surface; 24. Sixth surface;

[0074] 30. First lens group; 31. First lens unit; 311. First surface; 312. Second surface;

[0075] 40. Light-blocking plate; 41. Light-transmitting hole;

[0076] 50. Second lens group; 51. Second lens unit; 511. Third surface; 512. Fourth surface;

[0077] 61. First beam; 62. Second beam; 63. Third beam; 64. Projected light field;

[0078] 70. Zoom control assembly; 71. Coil; 72. Permanent magnet; 73. Housing. Detailed Implementation

[0079] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0080] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0081] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0083] The first aspect of this application provides an adjustable beam angle camera auxiliary lighting light distribution structure for use in devices such as mobile phones or cameras. This application uses the adjustable beam angle camera auxiliary lighting light distribution structure for mobile phone flashlights as an example for illustration. It can be understood that the adjustable beam angle camera auxiliary lighting light distribution structure can also be used in camera auxiliary lighting devices for artificial intelligence devices, camera auxiliary lighting devices for AR glasses (Augmented Reality Goggles) and VR glasses (Virtual Reality Glasses), camera auxiliary lighting devices for tablet computers, camera auxiliary lighting devices for autonomous driving in automobiles, camera auxiliary lighting devices for robots, and other devices with light sources.

[0084] An embodiment of the first aspect of this application provides a camera auxiliary illumination light distribution structure 100 with an adjustable beam angle. Please refer to [reference needed]. Figures 1 to 4An adjustable beam angle camera-assisted illumination light distribution structure 100 includes a light source assembly 10, a first lens group 30, a second lens group 50, and a zoom control assembly 70. The light source assembly 10 includes at least one emitting light source 11 for emitting a first beam 61; the first lens group 30 is disposed on one side of the light source assembly 10 along the optical axis X, and is used to converge the first beam 61 and emit a second beam 62; the second lens group 50 is disposed on the side of the first lens group 30 away from the light source assembly 10 along the optical axis X, and is used to refract the second beam 62 and emit a third beam 63; the zoom control assembly 70 is connected to the second lens group 50 and is used to drive the second lens group 50 to move along the optical axis X to change the beam angle of the third beam 63; and / or, the zoom control assembly 70 is connected to the first lens group 30, and is used to drive the first lens group 30 to move along the optical axis X to change the beam angle of the third beam 63.

[0085] The emitting light source 11 is used to emit a first beam 61 into the first lens group 30. The light source assembly 10 may include one or more emitting light sources 11. Optionally, the emitting light source 11 may include a light-emitting diode or a surface-mount light-emitting diode, etc., which has high luminous efficiency. Optionally, the emitting light source 11 may also be a laser light source, etc., which has high brightness.

[0086] The first lens group 30 has a real focal point, which is the intersection point of incident light rays parallel to the principal optical axis of the first lens group 30 after refraction by the first lens group 30. The first lens group 30 is used to converge the first beam 61 and emit the second beam 62, such that the beam angle of the second beam 62 is smaller than the beam angle of the first beam 61. For example, the first lens group 30 can be a convex lens. Optionally, the material of the first lens group 30 can include optical resin materials such as polycarbonate (PC resin), polymethyl methacrylate (PMMA resin), polymethyl methacrylimide (PMMI resin), cycloolefin copolymer (COC resin), polyamide 12 (PA12 transparent resin), or polysulfone resin, which have high light transmittance and are relatively lightweight. Optionally, the first lens group 30 can also include optical silicone material, which has good temperature resistance. Optionally, the first lens group 30 may also include a nano-imprinted UV adhesive material, which facilitates the fabrication of high-precision lenses.

[0087] Optionally, the second lens group 50 may have a virtual focal point, which is the intersection of the backward extensions of incident light rays parallel to the principal axis of the second lens group 50 after refraction by the second lens group 50. The second lens group 50 is used to diverge the second beam 62 and emit a third beam 63, making the beam angle of the third beam 63 larger than that of the second beam 62. The light rays of the third beam 63 are more dispersed, enabling it to illuminate a larger area at close range. For example, the second lens group 50 may be a concave lens.

[0088] Optionally, the second lens group 50 may also have a real focal point. The second lens group 50 is used to converge the second beam 62 and emit the third beam 63, so that the beam angle of the third beam 63 is smaller than that of the second beam 62. The light from the third beam 63 is more concentrated, and it can illuminate a farther distance. For example, the second lens group 50 may be a convex lens.

[0089] Optionally, the material of the second lens group 50 may include optical resins such as polycarbonate (PC resin), polymethyl methacrylate (PMMA resin), polymethyl methacrylimide (PMMI resin), cycloolefin copolymer (COC resin), polyamide 12 (PA12 transparent resin), or polysulfone resin, which offer high light transmittance and are relatively lightweight. Optionally, the second lens group 50 may also include optical silicone material, which has good temperature resistance. Optionally, the second lens group 50 may also include nano-imprinted UV adhesive material, facilitating the fabrication of high-precision lenses.

[0090] The third beam 63 emitted from the second lens group 50 is a diverging beam at the end furthest from the second lens group 50. Optionally, the third beam 63 can be a diverging beam, with its diameter gradually increasing from the second lens group 50 towards the direction away from the first lens group 30 along the optical axis X. Optionally, the third beam 63 can also first converge to a point and then diverge, with its diameter first decreasing and then gradually increasing from the second lens group 50 towards the direction away from the first lens group 30 along the optical axis X.

[0091] Optionally, the zoom control assembly 70 can be used to drive the first lens group 30 to move along the optical axis direction X, thereby changing the distance between the first lens group 30 and the second lens group 50.

[0092] Optionally, the zoom control assembly 70 can also be used to drive the second lens group 50 to move along the optical axis direction X, thereby changing the distance between the first lens group 30 and the second lens group 50.

[0093] Optionally, the zoom control assembly 70 can also be used to drive the first lens group 30 and the second lens group 50 to move along the optical axis direction X, thereby changing the distance between the first lens group 30 and the second lens group 50.

[0094] Optionally, the zoom control assembly 70 can be a voice coil motor or an electric actuator, etc. The zoom control assembly 70 can be connected to a controller to automatically control its operation.

[0095] Please refer to Figures 4 to 7 After the distance between the first lens group 30 and the second lens group 50 changes, the position of the light in the second beam 62 on the side of the second lens group 50 closest to the first lens group 30 changes, and the angle of incidence of the light in the second beam 62 on the side of the second lens group 50 closest to the first lens group 30 changes, thereby changing the beam angle of the third beam 63. The camera auxiliary illumination light distribution structure 100 with adjustable beam angle can be used as a mobile phone flash. When the mobile phone camera is switched to a short focal length for close-up shooting, the beam angle of the third beam 63 is increased, so that the third beam 63 can illuminate a larger area at close range and adapt to the shooting area; when the mobile phone camera is switched to a long focal length for distant shooting, the beam angle of the third beam 63 is decreased, so that the third beam 63 can illuminate a more distant area at close range and adapt to the shooting area.

[0096] The beneficial effects of this application embodiment are as follows: The zoom control component 70 controls the first lens group 30 and the second lens group 50 to move along the optical axis X, which can change the distance between the first lens group 30 and the second lens group 50, thereby changing the beam angle of the third beam 63. This allows for adjustments to the illuminated area and illuminance of the third beam 63 according to actual needs. The camera auxiliary lighting distribution structure 100, which adjusts the beam angle, can function as a mobile phone flash. During zooming to capture different areas, the camera auxiliary lighting distribution structure 100 allows the third beam 63 to illuminate the corresponding shooting area. This application embodiment uses a single light source to meet the lighting needs of both wide-angle and telephoto lenses on mobile phones, solving the technical problem of large light source size on mobile phones and improving the utilization efficiency of the light source.

[0097] In some embodiments, please refer to Figure 2 The light source assembly 10 also includes a support member 12 connected to the emitting light source 11, through which the emitting light source 11 can be conveniently connected to an external structure.

[0098] In some embodiments, please refer to Figures 1 to 4The camera-assisted lighting light distribution structure 100 with adjustable beam angle also includes a collimating lens 20, which is disposed between the light source assembly 10 and the first lens group 30. The collimating lens 20 is used to collimate the first beam 61 and direct it toward the first lens group 30.

[0099] Optionally, the number of collimating lenses 20 is the same as the number of emitting light sources 11, with each collimating lens 20 corresponding to one emitting light source 11, which can effectively collimate the first beam 61.

[0100] The collimating lens 20 is used to collimate the first beam 61, making the light rays in the beam incident on the first lens group 30 parallel or nearly parallel. Optionally, the collimating lens 20 may include optical resin materials such as polycarbonate (PC resin), polymethyl methacrylate (PMMA resin), polymethyl methacrylimide (PMMI resin), cycloolefin copolymer (COC resin), polyamide 12 (PA12 transparent resin), or polysulfone resin, which have high light transmittance and are relatively lightweight. Optionally, the collimating lens 20 may also include optical silicone material, which has good temperature resistance. Optionally, the collimating lens 20 may also include nano-imprinted UV adhesive material, which facilitates the manufacture of high-precision lenses.

[0101] The beneficial effects of this application embodiment are as follows: the collimating lens 20 is set to collimate the first beam 61, so that the first beam 61 can be uniformly projected onto the side of the first lens group 30 near the collimating lens 20. When the zoom control component 70 controls the first lens group 30 to move along the optical axis direction X, the first beam 61 can still be uniformly projected onto the side of the first lens group 30 near the collimating lens 20, so that the energy in the first beam 61 is fully utilized.

[0102] In some embodiments, please refer to Figure 1 , Figure 4 and Figure 8 The collimating lens 20 is a total internal reflection collimating lens. The side of the total internal reflection collimating lens away from the light source assembly 10 along the optical axis X is a plane. The side of the total internal reflection collimating lens close to the light source assembly 10 along the optical axis X is provided with a refractive body 21 and multiple annular reflecting prisms 22. The axis of the refractive body 21 coincides with the center line of the emitting light source 11. The multiple reflecting prisms 22 are all arranged around the refractive body 21.

[0103] The refractive element 21 is used to refract and collimate the light rays at the center of the first beam 61. The side of the refractive element 21 facing the light source assembly 10 along the optical axis X is convex and is positioned directly opposite the center of the emitting light source 11 in the light source assembly 10. The light-receiving angle θ1 of the refractive element 21 is greater than or equal to 40° and less than or equal to 80°. Optionally, the side of the refractive element 21 facing the light source assembly 10 along the optical axis X is aspherical, which has a stronger ability to converge light rays.

[0104] All the reflecting prisms 22 are annular structures with their axes coinciding with the optical axis. Multiple annular reflecting prisms 22 are nested coaxially. On the projection plane perpendicular to the optical axis, from the direction close to the optical axis to the direction away from the optical axis, the diameter of the orthographic projection of the multiple reflecting prisms 22 gradually increases, and the axis of the reflecting prisms 22 coincides with the optical axis.

[0105] The reflecting prism 22 includes an annular incident surface 221 and an annular reflecting surface 222. The incident surface 221 is located on the side of the reflecting prism 22 near the refractor 21. The incident surface 221 refracts the first beam 61 toward the reflecting surface 222, and the reflecting surface 222 reflects the first beam 61 toward the first lens group 30, making the light rays in the first beam 61 parallel or nearly parallel. Both the incident surface 221 and the reflecting surface 222 are conical surfaces whose axes coincide with the optical axis. Optionally, the angle C between the incident surface 221 and the optical axis is greater than or equal to 2° and less than or equal to 18°, which allows the reflecting prism 22 to be set to a smaller size and to collimate the first beam 61, thereby reducing the volume of the camera-assisted illumination light distribution structure 100 with adjustable beam angle.

[0106] For the reflecting prism 22, the geometric focusing ratio is a key factor limiting the uniformity of the light spot, and the ring spacing is the core parameter for calculating the geometric focusing ratio. The range of the ring spacing is determined through calculation and simulation. Optionally, the ring spacing D of the reflecting prism 22 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. A smaller ring spacing D allows multiple reflecting prisms 22 to be placed in a smaller space, improving the collimation effect. On the projection plane perpendicular to the optical axis, the difference between the outer diameter and inner diameter of the orthographic projection of the reflecting prism 22 is twice the ring spacing D of that reflecting prism 22. Optionally, different reflecting prisms 22 can have the same ring spacing. Optionally, the ring spacing D of the reflecting prism 22 is 0.18 mm. Optionally, different reflecting prisms 22 can also have different ring spacings. Optionally, the total internal reflection collimating lens has a light-receiving angle A of 160°, meaning that the light-receiving angle of the reflecting prism 22, which is furthest from the refractor 21 along the radial direction of the refractor 21, is 160°, enabling it to receive and collimate more light rays from the first beam 61. Optionally, the total internal reflection collimating lens can be a Fresnel lens, etc.

[0107] The beneficial effects of this application embodiment are as follows: the total internal reflection collimating lens has strong light focusing ability. By using the total internal reflection collimating lens to collimate the first beam 61, the total internal reflection collimating lens can be set to a smaller diameter, reducing the space occupied by the collimating lens 20, which is more suitable for small-sized camera auxiliary lighting light distribution structures 100 with adjustable beam angles, such as mobile phone flashlights.

[0108] In some embodiments, the parameters of the total internal reflection collimating lens are calculated using reverse tracing during design and evaluation. The following are the calculation and evaluation formulas:

[0109]

[0110] This formula is used to evaluate the size of the focused spot when tracing the beam backwards from the first spherical surface. Here, f is the focal length of the total internal reflection collimating lens; n is the refractive index of the total internal reflection collimating lens; r1 is the spherical radius of the refractive body 21; h is the thickness of the total internal reflection collimating lens; and x1 is the radius of the focal spot formed after the total internal reflection collimating lens converges the parallel beam. When x1 is moderate, the light-gathering efficiency of the refractive body 21 is highest. If x1 is too high, it may lead to poor manufacturability of the refractive body 21 or reduced light-gathering efficiency. If x1 is too small, it may lead to incomplete light gathering or reduced light-gathering efficiency. From this formula, it can be seen that when the refractive index n, height h, and focal length f of the material are known, the minimum value of r1 can be obtained when x1 is minimized. After numerical calculations with boundary conditions including the refractive index n, thickness h, and focal length f of the material, the optimal range is found to be between 2.0 mm ≤ r1 ≤ 23.8 mm. Optionally, a value of r1 of 8.3 mm is suitable, as it facilitates the fabrication of the refractive body 21 and results in high light-gathering efficiency.

[0111] The following boundary conditions must also be followed when designing a total internal reflection collimating lens:

[0112]

[0113] In the formula: n is the refractive index of the total internal reflection collimating lens; θ7 is the prism height angle, which is half of the light-receiving angle θ1 of the refractor 21; r refers to the focal spot radius formed by the total internal reflection collimating lens after converging the parallel beam when the incident beam parallel to the optical axis is incident on the incident surface 221 from the plane of the total internal reflection collimating lens; f is the focal length of the total internal reflection collimating lens; i is the ring number of the reflecting prism 22, which increases sequentially from the direction closer to the refractor 21 to the direction farther away from the refractor 21 (i is a positive integer); please refer to Figure 8 ΔR is the radius of the torus, which is half the difference between the outer diameter and the inner diameter of the incident surface 221 of the i-th reflecting prism 22; please refer to... Figure 9 x iLet x be the position of the incident light on the i-th ring. In the design, when an incident ray parallel to the optical axis travels from the plane of the total internal reflection collimating lens to the incident surface 221, the distance between the point where the incident ray exits from the incident surface 221 of the i-th reflecting prism 22 and the point on the incident surface 221 furthest from the plane of the total internal reflection collimating lens is x. i R is the aperture of the concentrator, which is the outer diameter of the i-th reflecting prism 22; K i Let θ1 be the edge height of the i-th reflecting prism 22, which is the dimension of the i-th reflecting prism 22 along its axial direction; β refers to the exit angle of a ray parallel to the axis of the total internal reflection collimating lens, which enters from the plane of the total internal reflection collimating lens and exits from the incident surface 221 of the i-th reflecting prism 22 (before exiting the reflecting prism 22). The edge height angle θ1 is related to the optical path configuration of the entire system. After adding boundary conditions using the finite-difference time-domain method, electromagnetic simulations were performed, and θ1 was calculated multiple times using multiple sets of parameters to finally determine the range of θ1.

[0114] In some embodiments, the side of the total internal reflection collimating lens furthest from the light source along the optical axis X is a frosted surface. The frosted surface can scatter light in different directions, thereby reducing the number of reflections inside the total internal reflection collimating lens, so that even if the number of reflecting prisms 22 is small, uniform distribution and collimation of the first beam 61 can be achieved.

[0115] In some embodiments, please refer to Figure 10 The total internal reflection collimating lens 20 includes five reflecting prisms 22. The five reflecting prisms 22 are designated as the first reflecting prism, the second reflecting prism, the third reflecting prism, the fourth reflecting prism, and the fifth reflecting prism from the direction closest to the optical axis to the direction furthest from the optical axis. The diameters of the first reflecting prism, the second reflecting prism, the third reflecting prism, the fourth reflecting prism, and the fifth reflecting prism gradually increase. The light-receiving angle θ2 of the first reflecting prism is 80°±4°, the light-receiving angle θ3 of the second reflecting prism is 100°±4°, the light-receiving angle θ4 of the third reflecting prism is 120°±4°, the light-receiving angle θ5 of the fourth reflecting prism is 140°±4°, and the light-receiving angle θ6 of the fifth reflecting prism is 160°±4°. It can receive more light rays from the first beam 61 and can ensure the collimation effect of the light rays.

[0116] In some embodiments, the collimating lens 20 is one of a superlens, an aspherical collimating lens, and a diffractive optical element (DOE collimating lens), each of which has a good collimating effect.

[0117] For example, please refer to Figure 1 , Figure 11 and Figure 12 The collimating lens 20 is a diffractive optical element, and its binary phase profile parameters are as follows: Figure 12 As shown, the collimating lens 20 is made of polycarbonate (POLYCARB) material.

[0118] The surface of the collimating lens 20 closest to the emitting light source 11 along the optical axis X is defined as the fifth surface 23, and the surface of the collimating lens 20 furthest from the emitting light source 11 along the optical axis X is defined as the sixth surface 24. The distance between the emitting light source 11 and the fifth surface 23 is 0.5 mm. The fifth surface 23 is a convex binary phase surface. The phase structure of the fifth surface 23 is used to converge light rays. The radius of curvature of the fifth surface 23 is 0.43638412 mm. The thickness of the collimating lens 20 is 0.1 mm. The optical radius of the fifth surface 23 is 0.3 mm. The normalized radius of the fifth surface 23 is 0.3. The phase of the second term of the fifth surface 23 is -423.6268344, the phase of the fourth term of the fifth surface 23 is 42.76540204, the phase of the sixth term of the fifth surface 23 is -5.504421491, and the phase of the eighth term of the fifth surface 23 is -0.213234342.

[0119] The sixth surface 24 is a planar binary phase surface. The distance between the sixth surface 24 and the projected light field 64 is 0.4 mm, and the optical radius of both the sixth surface 24 and the projected light field 64 is 0.3 mm. The projected light field 64 refers to the position of the imaging surfaces of the first lens group 30 and the second lens group 50 when a light beam from the side of the second lens group 50 away from the first lens group 30 is incident from the second lens group 50 onto the first lens group 30.

[0120] For example, please refer to Figures 13 to 15 Collimating lens 20 is an aspherical collimating lens, and its parameters are as follows: Figure 15 As shown, the collimating lens 20 is made of polycarbonate (POLYCARB) material.

[0121] Both the fifth surface 23 and the sixth surface 24 are even-order aspherical surfaces. The distance between the emitting light source 11 and the fifth surface 23 is 0.5 mm. The fifth surface 23 is convex, with a radius of curvature of 0.3756528 mm. The collimating lens 20 has a thickness of 0.1 mm, an optical radius of 0.3 mm, a normalized radius of 0.3, a quadratic aspherical term of -6.7145413, and a quartic aspherical term of 0.1456355.

[0122] The sixth surface 24 is convex, with a radius of curvature of 2.5432892 mm. The distance between the sixth surface 24 and the projected light field 64 is 0.4 mm, and the optical radius of the sixth surface 24 is 0.3 mm. The aspherical quadratic term of the sixth surface 24 is 3.1265672. The optical radius of the projected light field 64 is 0.3 mm.

[0123] For example, please refer to Figure 16 and Figure 17 Collimating lens 20 is a superlens, and the binary phase surface profile parameters of collimating lens 20 are as follows: Figure 14 As shown, the collimating lens 20 is made of polycarbonate (POLYCARB) material.

[0124] The distance between the emitting light source 11 and the fifth surface 23 is 0.5 mm. The fifth surface 23 is a convex binary phase surface. The phase structure of the fifth surface 23 is used to converge light rays. The radius of curvature of the fifth surface 23 is 1.9889453 mm. The thickness of the collimating lens 20 is 0.1 mm. The optical radius of the fifth surface 23 is 0.3 mm. The normalized radius of the fifth surface 23 is 0.3. The quadratic phase of the fifth surface 23 is -410.6543543. The quartic phase of the fifth surface 23 is 12.2154123.

[0125] The sixth surface 24 is a planar binary phase surface. The distance between the sixth surface 24 and the projected light field 64 is 0.4 mm, and the optical radius of the sixth surface 24 is 0.3 mm. The optical radius of the projected light field 64 is 0.3 mm.

[0126] In some embodiments, please refer to Figure 1 The first lens group 30 includes a plurality of first lens units 31, which are arranged in an array on a plane perpendicular to the optical axis direction X; the second lens group 50 includes a plurality of second lens units 51 corresponding to the first lens units 31, which are arranged in an array on a plane perpendicular to the optical axis direction X.

[0127] Each first lens unit 31 has a real focal point and is used to converge the first beam 61. Optionally, the first lens unit 31 can be an aspherical lens or a spherical lens, etc. Optionally, the first lens units 31 can be arranged in a polygonal array such as a rectangular array, a circular array, or a triangular array. Optionally, the diameter of the first lens unit 31 is 0.01mm-1mm. If the size of the first lens unit 31 is small, a smaller first lens group 30 can be arrayed, which can reduce the volume of the camera auxiliary illumination light distribution structure 100 with adjustable beam angle.

[0128] Each first lens unit 31 has a coaxially corresponding second lens unit 51. Optionally, each second lens unit 51 has a real focal point and is used to converge the second beam 62. Optionally, each second lens unit 51 has a virtual focal point and is used to diverge the second beam 62. Optionally, the second lens unit 51 can be an aspherical lens or a spherical lens, etc. The second lens units 51 can be arranged in a polygonal array such as a rectangular array, a circular array, or a triangular array. Optionally, the diameter of the second lens unit 51 is 0.01mm-1mm. A smaller size of the second lens unit 51 allows for the formation of a smaller second lens group 50, which can reduce the volume of the adjustable beam angle camera-assisted illumination light distribution structure 100.

[0129] Please refer to Figure 18 For ease of description, the side of the first lens unit 31 closest to the light source assembly 10 along the optical axis X is defined as the first surface 311; the side of the first lens unit 31 closest to the second lens unit 51 along the optical axis X is defined as the second surface 312; the side of the second lens unit 51 closest to the first lens unit 31 along the optical axis X is defined as the third surface 511; and the side of the second lens unit 51 facing away from the first lens unit 31 along the optical axis X is defined as the fourth surface 512. Please refer to... Figures 18 to 38 The first lens unit 31 and the second lens unit 51 can be combined in various ways.

[0130] For example, the first surface 311 is convex, the second surface 312 is convex, the third surface 511 is convex, and the fourth surface 512 is concave.

[0131] For example, please refer to Figure 28 The first surface 311 is convex, the second surface 312 is flat, the third surface 511 is convex, and the fourth surface 512 is concave.

[0132] For example, please refer to Figure 26 The first surface 311 is convex, the second surface 312 is concave, the third surface 511 is convex, and the fourth surface 512 is concave.

[0133] For example, please refer to Figure 18 The first surface 311 is convex, the second surface 312 is convex, the third surface 511 is concave, and the fourth surface 512 is concave.

[0134] For example, please refer to Figure 24 The first surface 311 is a plane, the second surface 312 is a convex surface, the third surface 511 is a convex surface, and the fourth surface 512 is a concave surface.

[0135] For example, please refer to Figure 22The first surface 311 is a plane, the second surface 312 is a convex surface, the third surface 511 is a plane, and the fourth surface 512 is a concave surface.

[0136] For example, please refer to Figure 20 The first surface 311 is a plane, the second surface 312 is a convex surface, the third surface 511 is a concave surface, and the fourth surface 512 is a concave surface.

[0137] For example, please refer to Figure 30 The first surface 311 is convex, the second surface 312 is concave, the third surface 511 is concave, and the fourth surface 512 is planar.

[0138] For example, please refer to Figure 32 The first surface 311 is convex, the second surface 312 is convex, the third surface 511 is convex, and the fourth surface 512 is flat.

[0139] For example, please refer to Figure 34 The first surface 311 is convex, the second surface 312 is flat, the third surface 511 is convex, and the fourth surface 512 is flat.

[0140] For example, please refer to Figure 36 The first surface 311 is concave, the second surface 312 is convex, the third surface 511 is convex, and the fourth surface 512 is planar.

[0141] For example, please refer to Figure 38 The first surface 311 is a plane, the second surface 312 is a convex surface, the third surface 511 is a convex surface, and the fourth surface 512 is a plane.

[0142] The beneficial effects of this application embodiment are as follows: the array arrangement of multiple first lens units 31 can focus the light in the first beam 61 separately, which can improve the light energy utilization rate; the multiple second lens units 51 are arranged corresponding to the first lens units 31, which can refract the multiple beams emitted by the multiple first lens units 31 separately, so that the light is uniformly mixed and uniform illumination is achieved.

[0143] In some embodiments, the first lens unit 31 is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens. That is, the first lens group 30 is any one of a spherical array, an aspherical array, a Fresnel lens array, a planar diffractive optical lens array, and a planar superlens array. This allows the first lens unit 31 to be set to a smaller size and to have a stronger ability to converge light. Consequently, the first lens group 30 formed by the array of the first lens units 31 can be set to a smaller size, making the first lens group 30 suitable for use in small-sized, adjustable beam angle camera auxiliary lighting distribution structures 100 such as mobile phone flashlights.

[0144] In some embodiments, the second lens unit 51 is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens. That is, the second lens group 50 is any one of a spherical array, an aspherical array, a Fresnel lens array, a planar diffractive optical lens array, and a planar superlens array. This allows the second lens unit 51 to be set to a smaller size and to have a stronger ability to refract light. Consequently, the second lens group 50 formed by the array of the second lens units 51 can be set to a smaller size, making the second lens group 50 suitable for use in small-sized, adjustable beam angle camera auxiliary lighting distribution structures 100 such as mobile phone flashlights.

[0145] In some embodiments, the first lens unit 31 is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens; and the second lens unit 51 is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens. The first lens unit 31 and the second lens unit 51 can be set to a smaller size, thereby enabling the formation of a small-sized first lens group 30 and a second lens group 50. This reduces the volume of the adjustable beam angle camera auxiliary illumination light distribution structure 100, making the adjustable beam angle camera auxiliary illumination light distribution structure 100 more suitable for mobile phones.

[0146] Optionally, the first lens unit 31 and the second lens unit 51 are lenses of the same type. The second beam 62 emitted from the first lens unit 31 is more evenly distributed on the second lens unit 51, and the light distribution in the final third beam 63 is more even.

[0147] In some embodiments, the first lens unit 31 and the second lens unit 51 are both aspherical lenses. The diameter of the aspherical lens is greater than or equal to 0.01 mm and less than or equal to 1 mm. The smaller diameter of the first lens unit 31 and the second lens unit 51 can reduce the volume of the adjustable beam angle camera auxiliary lighting distribution structure 100, making the adjustable beam angle camera auxiliary lighting distribution structure 100 more suitable for mobile phones.

[0148] In some embodiments, both the first lens unit 31 and the second lens unit 51 are planar superlenses, each containing a polarization-independent cylindrical nanopillar. Optionally, the period of the nanopillar is greater than or equal to 200 nm and less than or equal to 500 nm, exhibiting strong light refraction capabilities and a small planar superlens size, thereby reducing the volume of the camera-assisted illumination light distribution structure 100 with adjustable beam angle. Optionally, the height of the nanopillar is determined by the material of the planar superlens, and the height of the nanopillar is less than or equal to 1 μm, allowing it to be fabricated using various materials.

[0149] The beneficial effects of this application embodiment are that: the planar superlens is relatively thin and light. Since the first lens unit 31 and the second lens unit 51 are both planar superlenses, the first lens group 30 and the second lens can be set to a smaller size, making the camera auxiliary illumination light distribution structure 100 with adjustable beam angle smaller in size.

[0150] In some embodiments, both the first lens unit 31 and the second lens unit 51 are Fresnel lenses. Optionally, the sawtooth period of the Fresnel lens is greater than or equal to 5 μm and less than or equal to 0.2 μm. The Fresnel lens has a small size, which can reduce the volume of the camera-assisted illumination light distribution structure 100 with adjustable beam angle.

[0151] Optionally, the fourth surface 512 of the second lens group 50 is a concave polynomial Fresnel surface, which can maximize the beam angle. The third surface 511 is a concave spherical Fresnel surface, which is not sensitive to positional tolerances during zooming and provides a smoother beam pattern. Optionally, the second surface 312 of the second zoom group is a spherical convex Fresnel surface, which can focus light onto a position adjacent to the second surface 312. The first surface 311 is a convex polynomial Fresnel surface, which can effectively collect light collimated from the collimating lens 20.

[0152] The beneficial effects of this application embodiment are as follows: Fresnel lenses are relatively thin and light-reflecting and can refract light over a wide range. Since the first lens unit 31 and the second lens unit 51 are both Fresnel lenses, the first lens group 30 and the second lens can be set to a smaller size, making the camera auxiliary illumination light distribution structure 100 with adjustable beam angle smaller in size. Moreover, the third beam 63 emitted from the second lens group 50 can have a larger beam angle and a larger illumination range.

[0153] In some embodiments, please refer to Figure 40 Multiple first lens units 31 are arranged in a rectangular array; multiple second lens units 51 are arranged in a rectangular array, which is convenient for manufacturing.

[0154] Optionally, a plurality of first lens units 31 are arranged in an 8×8 rectangular array along the vertical optical axis. Optionally, a plurality of second lens units 51 are arranged in an 8×8 rectangular array.

[0155] In some embodiments, a plurality of first lens units 31 are arranged in a hexagonal array; a plurality of second lens units 51 are arranged in a hexagonal array. The hexagonal lens array can provide more uniform light coverage. Due to the close arrangement of the hexagons, the overlap and gaps of light can be minimized, making the distribution of light in the target area more uniform. Moreover, the close arrangement of the hexagonal array can capture and utilize light more effectively, reducing the loss of light energy.

[0156] In some embodiments, please refer to Figure 18 and Figure 19 The first lens group 30 has two surfaces along the optical axis X used to converge the light beam, meaning both surfaces along the optical axis X have a positive focal length. For example, when the first lens group 30 or the first lens unit 31 is an aspherical lens, both surfaces along the optical axis X are convex. For example, when the first lens group 30 or the first lens unit 31 is a planar superlens, both surfaces along the optical axis X of the planar superlens have a positive focal length and are binary phase. For example, when the first lens group 30 or the first lens unit 31 is a Fresnel lens, the Fresnel sawtooth on both surfaces along the optical axis X has a positive focal length, and both Fresnel sawtooth are used to converge the light beam.

[0157] The beneficial effects of this application embodiment are that: both sides of the first lens group 30 along the optical axis direction X are used to converge the light beam, which can enhance the light-gathering ability of the first lens group 30 and can stably direct the second light beam 62 to the second lens group 50.

[0158] In some embodiments, please refer to Figure 18 and Figure 19 The second lens group 50 has two surfaces along the optical axis X used for diverging light beams, meaning both surfaces along the optical axis X have negative focal lengths. For example, when the second lens group 50 or the second lens unit 51 is an aspherical lens, both surfaces along the optical axis X are concave. For example, when the second lens group 50 or the second lens unit 51 is a planar superlens, both surfaces along the optical axis X have negative focal lengths and binary phase. For example, when the second lens group 50 or the second lens unit 51 is a Fresnel lens, both surfaces along the optical axis X are provided with Fresnel serrations, the focal lengths of the Fresnel serrations on both surfaces are negative, and the Fresnel serrations are used for diverging light beams.

[0159] The beneficial effects of this embodiment are that both sides of the second lens group 50 along the optical axis direction X are used to diverge the light beam, which can enhance the ability of the second lens group 50 to diverge the light beam, and enable the third beam 63 to have a larger beam angle, thereby improving the illumination range of the third beam 63 at close range.

[0160] In some embodiments, please refer to Figure 18 and Figure 19 The first lens group 30 has two surfaces along the optical axis X used to converge the light beam, and the second lens group 50 has two surfaces along the optical axis X used to diverge the light beam.

[0161] In some embodiments, please refer to Figures 18 to 29The side of the second lens group 50 facing away from the first lens group 30 along the optical axis X is used to diffuse the second beam 62, which can enhance the ability of the second lens group 50 to diffuse light, and enable the third beam 63 to have a larger beam angle, thereby improving the illumination range of the third beam 63 at close range.

[0162] For example, when the second lens group 50 or the second lens unit 51 is an aspherical lens, the side of the aspherical lens facing away from the first lens group 30 along the optical axis X is concave. For example, when the second lens group 50 or the second lens unit 51 is a planar superlens, the side of the planar superlens facing away from the first lens group 30 along the optical axis X has a negative focal length and a binary phase. For example, when the second lens group 50 or the second lens unit 51 is a Fresnel lens, the Fresnel sawtooth on the side of the Fresnel lens facing away from the first lens group 30 along the optical axis X has a negative focal length, and this Fresnel sawtooth is used to diverge light rays.

[0163] In some embodiments, please refer to Figure 1 A zoom control assembly 70 is connected to the second lens group 50. The zoom control assembly 70 drives the second lens group 50 to move along the optical axis X between a first position and a second position. The distance between the first position and the first lens group 30 is less than the distance between the second position and the first lens group 30. In the optical axis X, when the second lens group 50 is moved to the first position, the focal length of the first lens group 30 is greater than the distance between the optical center of the first lens group 30 and the second lens group 50. In the optical axis X, when the second lens group 50 is moved to the second position, the focal length of the first lens group 30 is less than the distance between the optical center of the first lens group 30 and the second lens group 50.

[0164] When the second lens group 50 moves to the first position, the distance between the second lens group 50 and the first lens group 30 along the optical axis X is at its minimum. At this time, the focal length of the first lens group 30 is greater than the distance between the optical center of the first lens group 30 and the second lens group 50. That is, the focal point of the first lens group 30 is located within the second lens group 50, or the focal point of the first lens group 30 is located on the side of the second lens group 50 away from the first lens group 30 along the optical axis X. When the second beam 62 is projected onto the second lens group 50, the beam diameter is smaller and the beam convergence is higher. Optionally, the second lens group 50 is composed of thick lenses.

[0165] When the second lens group 50 moves to the second position, the distance between the second lens group 50 and the first lens group 30 in the optical axis direction X is at its maximum. At this time, the focal length of the first lens group 30 is less than the distance between the optical center of the first lens group 30 and the second lens group 50, meaning the focal point of the first lens group 30 is located between the first lens group 30 and the second lens group 50. The distance between the optical center of the first lens group 30 and the second lens group 50 refers to the distance between the optical center of the first lens group 30 and the side of the second lens group 50 closest to the first lens group 30 along the optical axis direction X. When the second beam 62 is projected onto the second lens group 50, the beam diameter is larger and the beam convergence is lower. Optionally, the zoom control component 70 can move the second lens group 50 a maximum distance along the optical axis direction X by 0.5 mm. The zoom control component 70 has a small stroke, which can reduce the size of the camera auxiliary illumination light distribution structure 100 with adjustable beam angle.

[0166] Please refer to Figures 18 to 25 , Figures 28 to 39 Different second lens units 51 in the second lens group 50 have different refraction effects on the second beam 62.

[0167] For example, please refer to Figure 24 , Figure 25 , Figure 28 and Figure 29 The third surface 511 is convex, and the fourth surface 512 is concave; Figure 25 From Figure (a) to Figure (e), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum; Figure 29 From Figure (a) to Figure (d), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum. When the second lens group 50 moves to the second position, the second beam 62 converges at a point between the second surface 312 and the third surface 511 and then diverges. The second beam 62 is in a divergent state when it is projected onto the third surface 511. The third surface 511 converges the second beam 62 and directs it toward the fourth surface 512. The fourth surface 512 diverges the second beam 62 and emits a third beam 63. The beam angle of the third beam 63 is the smallest. As the second lens group 50 moves closer to the first lens group 30, the beam angle of the third beam 63 gradually increases. When the second lens group 50 moves to the first position, the second beam 62 is in a converging state when it is projected onto the third surface 511. The third surface 511 converges the second beam 62, causing the second beam 62 to converge into a single point within the second lens group 50 and then diverge. After diverging, the second beam 62 is directed toward the fourth surface 512, which further diverges the second beam 62 and emits the third beam 63. The beam angle of the third beam 63 is the largest.

[0168] For example, please refer to Figure 22 and Figure 23 The third surface 511 is a plane, and the fourth surface 512 is a concave surface; in Figure 23 From Figure (a) to Figure (d), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum. When the second lens group 50 moves to the second position, the second beam 62 converges at a point between the second surface 312 and the third surface 511 and then diverges. The second beam 62 is in a divergent state when it is projected onto the third surface 511. The fourth surface 512 diverges the second beam 62 and emits a third beam 63, with the beam angle of the third beam 63 being the maximum. When the second lens group 50 moves towards the direction closer to the first lens group 30, the beam angle of the third beam 63 gradually decreases. When the second lens group 50 moves to the first position, the second beam 62 is in a convergent state when it is projected onto the third surface 511. The fourth surface 512 diverges the second beam 62 and emits a third beam 63, so that the third beam 63 converges at a point on the side of the second lens group 50 away from the first lens group 30 along the optical axis X to form a divergent beam, with the beam angle of the third beam 63 being the minimum.

[0169] For example, please refer to Figures 18 to 21 The third surface 511 is concave, and the fourth surface 512 is concave; Figure 19 From Figure (a) to Figure (e), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum; Figure 21 From Figure (a) to Figure (d), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum; when the second lens group 50 moves to the second position, the second beam 62 converges at a point between the second surface 312 and the third surface 511 and then diverges. The second beam 62 is in a divergent state when projected onto the third surface 511. The third surface 511 diverges the second beam 62 and directs it towards the fourth surface 512. The fourth surface 512 diverges the second beam 62 and emits the third beam 63. The beam angle of the third beam 63 is the largest. When the second lens group 50 moves closer to the first lens group 30, the beam angle of the third beam 63 gradually decreases. When the second lens group 50 moves to the first position, the second beam 62 is in a converging state when it is projected onto the third surface 511. The third surface 511 diverges the second beam 62. After the second beam 62 is diverged, it is directed toward the fourth surface 512. The fourth surface 512 further diverges the second beam 62 and emits the third beam 63. The beam angle of the third beam 63 is the smallest.

[0170] For example, please refer to Figure 30 The third surface 511 is concave, and the fourth surface 512 is flat; Figure 31From Figure (a) to Figure (c), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum; when the second lens group 50 moves to the second position, the second beam 62 converges at a point between the second surface 312 and the third surface 511 and then diverges. The second beam 62 is in a divergent state when projected onto the third surface 511. The third surface 511 diverges the second beam 62 and directs it towards the fourth surface 512. After passing the fourth surface 512, the second beam 62 continues to diverge and forms a third beam 63, with the third beam 63 having the largest beam angle; when the second lens group 50 moves closer to the first lens group 30, the third beam... The beam angle of beam 63 gradually decreases; when the second lens group 50 moves to the first position, the second beam 62 is in a converging state when it is projected onto the third surface 511. The third surface 511 diverges the second beam 62, and the second beam 62 continues to converge and is directed toward the fourth surface 512. After passing the fourth surface 512, the second beam 62 continues to converge and form the third beam 63. The third beam 63 converges into a point on the side of the fourth surface 512 away from the third surface 511 and then diverges, forming a diverging beam. The third beam 63 converges into a point on the side of the second lens group 50 along the optical axis direction X away from the first lens group 30 and forms a diverging beam. The beam angle of the third beam 63 is the smallest.

[0171] Please refer to Figures 32 to 39 The third surface 511 is convex, and the fourth surface 512 is flat. Figure 33 , Figure 35 , Figure 37 and Figure 39 From Figure (a) to Figure (c), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum. When the second lens group 50 moves to the second position, the second beam 62 converges at a point between the second surface 312 and the third surface 511 and then diverges. The second beam 62 is in a divergent state when it is projected onto the third surface 511. The third surface 511 converges the second beam 62 and directs it toward the fourth surface 512. After passing through the fourth surface 512, the second beam 62 continues to diverge and forms a third beam 63. The beam angle of the third beam 63 is the smallest. When the second lens group 50 moves closer to the first lens group 30, the beam angle of the third beam 63 gradually increases. When the second lens group 50 moves to the first position, the second beam 62 is in a converging state when it is projected onto the third surface 511. The third surface 511 converges the second beam 62. The second beam 62 converges into a point in the second lens group 50 and then diverges and shoots toward the fourth surface 512. After passing the fourth surface 512, the second beam 62 continues to diverge and forms the third beam 63. The beam angle of the third beam 63 is the smallest.

[0172] The beneficial effects of this application embodiment are as follows: by limiting the moving distance of the second lens group 50 to the above-mentioned range, when the third surface 511 is convex, when the second lens group 50 moves to the second position, the second beam 62 can form a diverging beam when projected onto the second lens group 50. After the second beam 62 is converged by the third surface 511, the beam angle becomes smaller. After the second beam 62 is diverged by the fourth surface 512, it can form a third beam 63 with a smaller beam angle. After the second lens group 50 moves closer to the first lens group 30, the second beam 62 can form a converging beam when projected onto the second lens group 50. The second beam 62 can converge into a point in the second lens group 50 and diverge again after passing through the third surface 511. After the second beam 62 is further diverged by the fourth surface 512, it can form a third beam 63 with a larger beam angle. The beam angle of the third beam 63 has a large range of variation. When the size of the camera auxiliary illumination light distribution structure 100 with adjustable beam angle is small, the beam angle of the third beam 63 can vary in the range of 15°-140°.

[0173] When the third surface 511 is flat or concave, when the second lens group 50 moves to the second position, the second beam 62 can form a diverging beam when projected onto the second lens group 50. The divergence of the second beam 62 after passing through the third surface 511 is still relatively large. After the second beam 62 is further diverged by the fourth surface 512, it can form a third beam 63 with a larger beam angle. After the second lens group 50 moves closer to the first lens group 30, the second beam 62 can form a converging beam when projected onto the second lens group 50. After passing through the third surface 511, the second beam 62 can converge in the second lens group 50, reducing the divergence of the second beam 62. After passing through the fourth surface 512, the second beam 62 can form a third beam 63 with a smaller beam angle. The beam angle of the third beam 63 has a large range of variation. When the size of the adjustable beam angle camera auxiliary illumination light distribution structure 100 is small, the beam angle of the third beam 63 can vary in the range of 15°-140°.

[0174] In some embodiments, please refer to Figure 1 , Figure 26 and Figure 27 A zoom control assembly 70 is connected to the second lens group 50. The zoom control assembly 70 drives the second lens group 50 to move along the optical axis X between a first position and a second position. The distance between the first position and the first lens group 30 is less than the distance between the second position and the first lens group 30. In the optical axis X, when the second lens group 50 is moved to the first position, the focal length of the first lens group 30 is greater than the distance between the optical center of the first lens group 30 and the second lens group 50. In the optical axis X, when the second lens group 50 is moved to the second position, the focal length of the first lens group 30 is greater than the distance between the optical center of the first lens group 30 and the second lens group 50.

[0175] For example, please refer to Figure 26 and Figure 27 The third surface 511 is convex, and the fourth surface 512 is concave; Figure 27 From Figure (a) to Figure (e), the distance between the second lens unit 51 and the first lens unit 31 gradually changes from maximum to minimum; when the second lens group 50 moves to the second position, the second beam 62 gradually converges between the second surface 312 and the third surface 511, and the second beam 62 is in a converging state when it is projected onto the third surface 511, so that the second beam 62 converges into a point within the second lens group 50 and then diverges. After diverging, the second beam 62 is directed toward the fourth surface 512, and the fourth surface 512 further diverges the second beam 62 and emits a third beam 63, with the beam angle of the third beam 63 being the smallest; when the second lens group 50 moves toward the direction closer to the first lens group 30, the beam angle of the third beam 63 gradually increases; when the second lens group 50 moves to the first position, the beam angle of the third beam 63 becomes the maximum.

[0176] In some embodiments, please refer to Figure 1 and Figure 18 The distance B between the first lens group 30 and the second lens group 50 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. The overall size of the first lens group 30 and the second lens group 50 along the optical axis X is small, which reduces the volume of the camera-assisted illumination light distribution structure 100 with adjustable beam angle. The distance B between the first lens group 30 and the second lens group 50 refers to the distance between the side of the first lens group 30 closest to the second lens group 50 along the optical axis X and the side of the second lens group 50 closest to the first lens group 30 along the optical axis X. For example, in the optical axis X, when the second lens group 50 is moved to a first position, the distance between the first lens group 30 and the second lens group 50 is greater than or equal to 0.1 mm. In the optical axis X, when the second lens group 50 is moved to a second position, the distance between the first lens group 30 and the second lens group 50 is less than or equal to 0.5 mm.

[0177] In some embodiments, the zoom control assembly 70 includes a voice coil motor and / or a linear motor. Optionally, the zoom control assembly 70 may include a voice coil motor, which can be used to drive the first lens group 30 or the second lens group 50 to move along the optical axis direction X. For example, please refer to... Figure 1The voice coil motor includes a coil 71, a permanent magnet 72, and a housing 73. The permanent magnet 72 is fixed to the housing 73, and the coil 71 is fixed to the second lens group 50. When energized, the coil 71 can move relative to the permanent magnet 72. Optionally, the zoom control assembly 70 may also include two voice coil motors, which can be used to drive the first lens group 30 and the second lens group 50 to move along the optical axis X, respectively, enabling precise control of the moving distance of the first lens group 30 and the second lens group 50. Optionally, the zoom control assembly 70 may also include a linear motor, which can be used to drive either the first lens group 30 or the second lens group 50 to move along the optical axis X, resulting in lower energy consumption. Optionally, the zoom control assembly 70 may also include two linear motors, which can be used to drive the first lens group 30 and the second lens group 50 to move along the optical axis X, respectively, resulting in higher operating efficiency. Optionally, the zoom control assembly 70 may include a voice coil motor and a linear motor, which can be used to drive the first lens group 30 and the second lens group 50 to move along the optical axis direction X, respectively.

[0178] The beneficial effects of this application embodiment are as follows: the voice coil motor and the linear motor are small in size, the zoom control component 70 can be reduced in size by using a voice coil motor and / or a linear motor, and the voice coil motor and the linear motor can respond quickly and have high positioning accuracy, which can accurately drive the first lens group 30 or the second lens group 50 to move to the designated position, thereby accurately controlling the beam angle change of the third beam 63 and accurately controlling the illumination area of ​​the camera auxiliary illumination light distribution structure 100 with adjustable beam angle.

[0179] In some embodiments, please refer to Figure 1 The camera auxiliary lighting light distribution structure 100 with adjustable beam angle also includes a light-blocking plate 40 disposed between the first lens group 30 and the second lens group 50. The light-blocking plate 40 is provided with a plurality of light-transmitting holes 41, which correspond to a plurality of first lens units 31 and a plurality of second lens units 51, respectively.

[0180] A light-blocking plate 40 is perpendicular to the optical axis X. The light-blocking plate 40 comprises an opaque material and is capable of blocking the second light beam 62. A light-transmitting hole 41 extends through the light-blocking plate 40 along the optical axis X, allowing the second light beam 62 to pass through and reach the second lens group 50. Optionally, the light-blocking plate 40 can be a metal light-blocking sheet with high strength. Optionally, the light-blocking plate 40 can be provided with light-blocking structures such as colored light-blocking ink, a light-blocking coating layer, or a resin light-blocking film.

[0181] Multiple light-transmitting holes 41 correspond to multiple first lens units 31, and multiple light-transmitting holes 41 also correspond to multiple second lens units 51. That is, for each first lens unit 31, there is a light-transmitting hole 41 and a second lens unit 51 coaxial with that first lens unit 31. Optionally, the aperture of the light-transmitting hole 41 is smaller than the diameter of the first lens unit 31. Optionally, the light-transmitting hole 41 can be a circular hole or an elliptical hole. Optionally, the light-transmitting hole 41 can also be a polygonal hole of various shapes such as quadrilateral, pentagon, hexagon, or octagon.

[0182] The beneficial effects of this application embodiment are as follows: the light-transmitting hole 41 enables the second beam 62 to be projected onto the second lens unit 51, the light-blocking plate 40 can block excess stray light in the second beam 62 from entering the second lens unit 51, and can block stray light that is particularly bright at certain angles due to higher-order diffraction, making the edge of the emitted light spot sharp, and making the shape of the light spot consistent with the shape of the light-transmitting hole 41 of the light-blocking layer.

[0183] In some embodiments, the light-blocking plate 40 is made of black material, and the thickness of the light-blocking plate 40 along the optical axis direction X is less than or equal to 0.2 mm, which makes it easy to install in a small space and can reduce the volume of the camera auxiliary lighting distribution structure 100 with adjustable beam angle.

[0184] Optionally, the light-blocking plate 40 can be made of black plastic, which is lightweight. Alternatively, the light-blocking plate 40 can also be made of a black metal material, which is strong.

[0185] Optionally, the thickness of the light-blocking plate 40 along the optical axis X can be 0.2 mm, resulting in higher strength. Alternatively, the thickness of the light-blocking plate 40 along the optical axis X can also be 0.1 mm, resulting in lower weight and smaller space occupation.

[0186] The beneficial effects of this application embodiment are as follows: the light-blocking plate 40 is made of black material, which has a stronger ability to block light and improves the effect of filtering stray light; the thickness of the light-blocking plate 40 is less than or equal to 0.2mm, so the light-blocking plate 40 occupies less space, and the camera auxiliary lighting light distribution structure 100 with adjustable beam angle is more suitable for smaller installation spaces.

[0187] In some embodiments, the light-blocking plate 40 is made of black material, and the aperture of the light-transmitting hole 41 is less than or equal to 0.3 mm, which can be adapted to the first lens unit 31 with a smaller diameter.

[0188] The aperture of the light-transmitting hole 41 is related to the diameter of the first lens unit 31 and the second lens unit 51. Optionally, the aperture of the light-transmitting hole 41 can be 0.3 mm. Optionally, the aperture of the light-transmitting hole 41 can also be 0.1 mm.

[0189] The beneficial effects of this application embodiment are that: the aperture of the light-transmitting hole 41 is less than or equal to 0.3mm, so the light-blocking plate 40 occupies less space, and the camera auxiliary lighting light distribution structure 100 with adjustable beam angle is more suitable for smaller installation spaces.

[0190] In some embodiments, both the first lens unit 31 and the second lens unit 51 are aspherical lenses, and the side of the total internal reflection collimating lens closest to the first surface 311 (the light-emitting surface) is a frosted surface. Please refer to... Figure 41 When designing the optical path for adjusting the beam angle of the third beam 63 of a first lens unit 31 and a second lens unit 51, and for adjusting the angle of the light field, if the projected light field 64 is taken as a fixed reference surface, then the first lens unit 31 and the second lens unit 51 need to be moved simultaneously to adjust the beam angle of the third beam 63. The projected light field 64 refers to the imaging surface position of the first lens group 30 and the second lens unit 51 when the beam on the side of the second lens unit 51 away from the first lens unit 31 is directed from the second lens group 50 to the first lens group 30. The beam on the side of the second lens unit 51 away from the first lens unit 31 is defined as the designed projected beam.

[0191] Optionally, with the second lens group 50 as the reference surface and its position fixed, the projected light field 64, where the beam angle of the designed projected beam is equal to the maximum beam angle of the third beam 63, is positioned at the output surface of the total internal reflection collimating lens. The zoom control component 70 drives the first lens group 30 to move closer to the second lens group 50, causing the projected light field 64 to move and reducing the beam angle of the designed projected beam. In actual use, the light at the position of the projected light field 64 is output from the total internal reflection collimating lens. The light, homogenized by the frosted surface and uniformly distributed with a certain diffusion angle, remains nearly parallel before and after the movement of the projected light field 64, and the uniformity of the light spot is almost unaffected. The projection light spot of the third beam 63 is formed by superimposing the projection light spots of multiple aspherical lens light distribution units, resulting in a very uniform projection light spot. The beam angle adjustment range of the third beam 63 emitted by a single first lens unit 31 and second lens unit 51 is 15°-140°, allowing the third beam 63 to illuminate a larger area.

[0192] For example, please refer to the parameters of the first lens unit 31 and the corresponding second lens unit 51. Figure 42 The first lens unit 31 and the second lens unit 51 are both made of polycarbonate (POLYCARB) material. The first surface 311, the second surface 312, the third surface 511 and the fourth surface 512 are all even-order aspherical surfaces. The distance between the object surface and the first surface 311 is 1 mm. The projected light field 64 is the image surface corresponding to the object surface.

[0193] The fourth surface 512 is convex, and the radius of curvature of the fourth surface 512 is 0.436386412 mm. The thickness of the second lens unit 51 is 0.28 mm. The aspherical quadratic term of the fourth surface 512 is 1.726438625, and the optical radius of the fourth surface 512 is 0.37 mm.

[0194] The third surface 511 is concave, with a radius of curvature of 0.359186859 mm. The distance between the third surface 511 and the light-blocking plate 40 is 0.326221686 mm. The aspherical quadratic term of the third surface 511 is 2.242217102, and the optical radius of the third surface 511 is 0.283 mm.

[0195] The distance between the light-blocking plate 40 and the second surface 312 is 0.093681681 mm, and the optical radius of the light-blocking plate 40 is 0.1 mm.

[0196] The second surface 312 is convex, with a radius of curvature of 0.386020963 mm. The thickness of the first lens unit 31 is 0.466868767 mm. The aspherical quadratic term of the second surface 312 is 2.635036113, and the optical radius of the second surface 312 is 0.34 mm.

[0197] The first surface 311 is convex, with a radius of curvature of 0.546648658 mm. The distance between the first surface 311 and the projected light field 64 is 0.283274127 mm. The aspherical quadratic term of the first surface 311 is -1.94581475, and its optical radius is 0.37 mm. The optical radius of the projected light field 64 is 0.32708523 mm.

[0198] In some embodiments, the first lens unit 31 and the second lens unit 51 are both Fresnel lenses. The collimating lens 20 collimates the first beam 61 emitted by the light source assembly 10. The collimated first beam 61 is converged by the first lens group 30 to form a second beam 62. The second beam 62 converges to the gap between the first lens group 30 and the second lens group 50 and then diverges. The second beam 62 is then expanded by the second lens group 50 to form a third beam 63.

[0199] In the optical path design for adjusting the beam angle and variable-angle light field of the third beam 63 of a first lens unit 31 and a second lens unit 51, the second lens group 50 is kept in a fixed position as a reference surface. The projected light field 64, where the beam angle of the designed projection beam is equal to the maximum beam angle of the third beam 63, is set at the position of the light-emitting surface of the total internal reflection collimating lens. By driving the first lens group 30 to move closer to the second lens group 50 through the zoom control component 70, the projected light field 64 moves closer to the second lens group 50, and the beam angle of the designed projection beam decreases. In actual use, the collimating lens 20 emits a parallel beam, and the projected light field 64 remains parallel before and after movement. Therefore, when the first lens group 30 and the projected light field 64 move, the uniformity of the light spot is hardly affected. By superimposing the projected light spots of multiple Fresnel lens light distribution units to form the projected light spot of the third beam 63, a very uniform projected light spot can be obtained.

[0200] For example, please refer to the parameters of the first lens unit 31 and the corresponding second lens unit 51. Figure 43 Both the first lens unit 31 and the second lens unit 51 are made of polycarbonate (POLYCARB) material, and the distance between the object plane and the fourth surface 512 is 0.3 mm. The fourth surface 512 is a concave polynomial Fresnel surface used to diverge light. The radius of curvature of the fourth surface 512 is 0.603240197 mm. The thickness of the second lens unit 51 is 0.3 mm. The aspherical fourth term of the fourth surface 512 is 3.166431557, the aspherical sixth term is 11.07134051, the aspherical eighth term is -260.632956, and the optical radius of the fourth surface 512 is 0.28 mm.

[0201] The third surface 511 is a concave spherical Fresnel surface used to diffuse light. The radius of curvature of the third surface 511 is 0.60379257 mm. The distance between the third surface 511 and the light-blocking plate 40 is 0.191663418 mm. The optical radius of the third surface 511 is 0.28 mm.

[0202] The distance between the light-blocking plate 40 and the second surface 312 is 0.228315273 mm, and the optical radius of the light-blocking plate 40 is 0.090015 mm. The second surface 312 is a convex Fresnel surface of a spherical surface used to converge light rays, and the radius of curvature of the second surface 312 is 0.435222926 mm. The thickness of the first lens unit 31 is 0.3 mm, and the optical radius is 0.28 mm.

[0203] The first surface 311 is a convex polynomial Fresnel surface used to converge light rays. The radius of curvature of the first surface 311 is 0.298755982 mm. The distance between the first surface 311 and the projected light field 64 is 0.430035359 mm. The aspherical fourth-order term of the first surface 311 is 13.74320371, the aspherical sixth-order term is -154.5427719, and the aspherical eighth-order term is 2780.965794. The optical radius of the first surface 311 is 0.28 mm. The optical radius of the projected light field 64 is 0.252632 mm.

[0204] Please refer to the simulation diagram of the optical path at the maximum beam angle of the third beam 63. Figure 44 The light in the third beam 63 is uniformly distributed. For the shape of the light spot and illuminance (Lux) of the third beam 63 at a distance of one meter, please refer to [reference needed]. Figure 45 , Figure 45 Figure (a) shows the position of the light spot in the horizontal (X-axis) and vertical (Y-axis) directions. Figure 45 Figure (b) shows the illuminance of the light spot at different longitudinal positions in Figure (a). Figure 45 Figure (c) shows the illuminance of the light spot at different horizontal positions in Figure (a); Figure 45 Figure (d) shows the illuminance corresponding to the color in Figure (a). For a simulation diagram of the optical path at the minimum beam angle of the third beam 63, please refer to [the original text]. Figure 46 The light in the third beam 63 is uniformly distributed. For the shape of the light spot and illuminance (Lux) of the third beam 63 at a distance of one meter, please refer to [reference needed]. Figure 47 , Figure 47 Figure (a) shows the position of the light spot in the horizontal (X-axis) and vertical (Y-axis) directions. Figure 47 Figure (b) shows the illuminance of the light spot at different longitudinal positions in Figure (a). Figure 47 Figure (c) shows the illuminance of the light spot at different horizontal positions in Figure (a); Figure 47 Figure (d) shows the illuminance corresponding to the colors in Figure (a).

[0205] In some embodiments, both the first lens unit 31 and the second lens unit 51 are surface superlenses. When designing the optical path for adjusting the beam angle and variable-angle light field of the third beam 63 from a first lens unit 31 and a second lens unit 51, the second lens group 50 is kept in a fixed position as a reference surface. The projected light field 64, where the designed beam angle of the projected beam is equal to the maximum angle of the third beam 63, is positioned at the exit surface of the total internal reflection collimating lens. By driving the first lens group 30 closer to the second lens group 50 through the zoom control component 70, the projected light field 64 moves closer to the second lens group 50, thus reducing the beam angle of the designed projected beam. In actual use, the collimating lens 20 emits a parallel beam. Therefore, when the first lens group 30 and the projected light field 64 move, the projected light field 64 remains parallel before and after the movement, and the uniformity of the light spot is almost unaffected. By superimposing the projected light spots of multiple Fresnel lens light distribution units to form the projected light spot of the third beam 63, a very uniform projected light spot can be obtained. The beam angle adjustment range of the third beam 63 emitted by a single first lens unit 31 and second lens unit 51 is 15°-140°, and the third beam 63 can illuminate a larger area.

[0206] Please refer to the binary phase profile parameters of the first lens unit 31 and the corresponding second lens unit 51. Figure 48 Both the first lens unit 31 and the second lens unit 51 are made of polycarbonate (POLYCARB) material.

[0207] The fourth surface 512 is a planar binary phase surface. The phase structure of the fourth surface 512 is used to diverge light. The thickness of the second lens unit 51 is 0.3 mm. The optical radius of the fourth surface 512 is 0.35 mm. The diffraction order of the fourth surface 512 is 1. The maximum quadratic term of the fourth surface 512 is 3. The normalized radius of the fourth surface 512 is 1. The phase of the quadratic term of the fourth surface 512 is 8957.885844. The phase of the fourth fourth term of the fourth surface 512 is -40483.7. The phase of the sixth term of the fourth surface 512 is 424354.1. The maximum beam angle of the third beam 63 can be maximized.

[0208] The third surface 511 is a planar binary phase surface. The phase structure of the third surface 511 is used to diverge light. The distance between the third surface 511 and the light-blocking plate 40 is 0.413396241 mm. The optical radius of the third surface 511 is 0.35 mm. The diffraction order of the third surface 511 is 1. The maximum quadratic term of the third surface 511 is 1. The normalized radius of the third surface 511 is 1. The phase of the quadratic term of the third surface 511 is -8502.398651. The distance between the light-blocking plate 40 and the second surface 312 is 0.189996943 mm. The optical radius of the light-blocking plate 40 is 0.07364902 mm.

[0209] The second surface 312 is a planar binary phase surface. The phase structure of the second surface 312 is used to converge light rays. The thickness of the first lens unit 31 is 0.3 mm. The optical radius of the second surface 312 is 0.35 mm. The diffraction order of the second surface 312 is 1. The maximum quadratic term of the second surface 312 is 1. The normalized radius of the second surface 312 is 1. The phase of the quadratic term of the second surface 312 is -2574.12453.

[0210] The first surface 311 is a planar binary phase surface. The phase structure of the first surface 311 is used to converge light rays. The distance between the first surface 311 and the projected light field 64 is 0.246578895 mm. The optical radius of the first surface 311 is 0.35 mm. The diffraction order of the first surface 311 is 1. The largest quadratic term of the first surface 311 is 3. The normalized radius of the first surface 311 is 1. The phase of the quadratic term of the first surface 311 is -18509.40145, the phase of the fourth term of the first surface 311 is 92315.94, and the phase of the sixth term of the first surface 311 is -3250301. The optical radius of the projected wavefront is 0.33863354 mm.

[0211] In some embodiments, both the first lens unit 31 and the second lens unit 51 are planar diffractive optical lenses. Please refer to [reference needed] for the binary phase profile parameters of the first lens unit 31 and the corresponding second lens unit 51. Figure 49 Both the first lens unit 31 and the second lens unit 51 are made of polycarbonate (POLYCARB) material.

[0212] The fourth surface 512 is a planar binary phase surface. The phase structure of the fourth surface 512 is used to diverge light. The thickness of the second lens unit 51 is 0.35 mm. The optical radius of the fourth surface 512 is 0.35 mm. The normalized radius of the fourth surface 512 is 0.35. The phase of the quadratic term of the fourth surface 512 is 312.7821238. The phase of the fourth fourth term of the fourth surface 512 is 23.12336081. The phase of the sixth term of the fourth surface 512 is 1.50433421. The phase of the eighth term of the fourth surface 512 is 0.23276542.

[0213] The third surface 511 is a planar binary phase surface. The phase structure of the third surface 511 is used to diverge light. The distance between the third surface 511 and the light-blocking plate 40 is 0.432133212 mm. The optical radius of the third surface 511 is 0.35 mm, the normalized radius of the third surface 511 is 0.35, the phase of the second term of the third surface 511 is -433.6236544, the phase of the fourth term of the third surface 511 is 41.76531216, the phase of the sixth term of the third surface 511 is -0.504421491, and the phase of the eighth term of the third surface 511 is -0.232133334. The distance between the light-blocking plate 40 and the second surface 312 is 0.19 mm, and the optical radius of the light-blocking plate 40 is 0.07651646 mm.

[0214] The second surface 312 is a planar binary phase surface. The phase structure of the second surface 312 is used to converge light rays. The thickness of the first lens unit 31 is 0.3 mm. The optical radius of the second surface 312 is 0.35 mm. The normalized radius of the second surface 312 is 0.35. The phase of the second surface 312 is 233.8776887, the phase of the second surface 312 is 22.77621765, the phase of the second surface 312 is -0.442421421, and the phase of the second surface 312 is -0.231232321.

[0215] The first surface 311 is a planar binary phase surface. The phase structure of the first surface 311 is used to converge light rays. The distance between the first surface 311 and the projected light field 64 is 0.196321331 mm. The optical radius of the first surface 311 is 0.35 mm. The normalized radius of the first surface 311 is 0.35. The phase of the second term of the first surface 311 is 5431.659474, the phase of the fourth term of the first surface 311 is 32.78903897, the phase of the sixth term of the first surface 311 is 1.789008321, and the phase of the eighth term of the first surface 311 is 0.758156845. The optical radius of the projected light field 64 is 0.3484178 mm.

[0216] In some embodiments, the zoom control component 70 is connected to the first lens group 30 and is used to drive the first lens group 30 to move along the optical axis direction X, so that the projected light field 64 moves by a distance less than or equal to 1 mm.

[0217] In some embodiments, please refer to Figure 50 The light source assembly 10 includes two emitting light sources 11; the camera auxiliary lighting light distribution structure 100 with adjustable beam angle includes two spliced ​​collimating lenses 20, each of which corresponds to one of the two emitting light sources 11.

[0218] Optionally, the two emitting light sources 11 can be used to emit a first light beam 61 with the same color temperature. Alternatively, the two emitting light sources 11 can also be used to emit first light beams 61 with different color temperatures. For example, the two emitting light sources 11 can be used to emit white light. For example, the two emitting light sources 11 can also be used to emit near-infrared light. For example, the two emitting light sources 11 can be used to emit white light and near-infrared light respectively.

[0219] Two collimating lenses 20 are used to collimate the first beam 61 emitted by the two emission sources 11.

[0220] The beneficial effects of this application embodiment are as follows: the two emitting light sources 11 can enhance the energy of the first beam 61 emitted by the light source assembly 10, providing a better lighting effect. Moreover, the two emitting light sources 11 can emit light of different color temperatures, providing different lighting effects, which is convenient for use when taking pictures; the two collimating lenses 20 respectively collimate the light emitted by the two emitting light sources 11, and can receive and collimate more of the first beam 61.

[0221] In some embodiments, please refer to Figure 50 and Figure 51The camera-assisted illumination light distribution structure 100 with adjustable beam angle includes two spliced ​​collimating lenses 20. Both collimating lenses 20 are total internal reflection collimating lenses. On the plane perpendicular to the optical axis X, the orthographic projection of the total internal reflection collimating lenses is a chamfer shape. The axes of the reflecting prisms 22 in the two total internal reflection collimating lenses pass through the centers of the two emitting light sources 11, respectively. Each total internal reflection collimating lens has a cross-section parallel to the optical axis X. The cross-sections of the two total internal reflection collimating lenses are connected and symmetrical about the cross-sections. By splicing the two total internal reflection collimating lenses together, light can be received between the two total internal reflection lenses, resulting in a more uniform distribution of the collimated first beam 61. Optionally, the ring spacing D of the reflecting prisms 22 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. A smaller ring spacing D allows for the placement of multiple reflecting prisms 22 within a smaller space, improving the collimation effect. For example, in the arrangement direction of the two total internal reflection collimating lenses, the distance between the two emitting light sources 11 is 1 mm.

[0222] In some embodiments, please refer to Figure 52 The camera-assisted illumination light distribution structure 100 with adjustable beam angle includes three spliced ​​collimating lenses 20, two of which are total internal reflection collimating lenses and the other is an intermediate collimating lens. The axes of the reflecting prisms 22 in the two total internal reflection collimating lenses pass through the centers of the two emitting light sources 11, respectively.

[0223] On the plane perpendicular to the optical axis X, the orthographic projection of the total internal reflection collimating lens is a semi-circle. The intermediate collimating lens is positioned between the two total internal reflection collimating lenses along the first direction P, which is perpendicular to the optical axis X. The side of the intermediate collimating lens away from the light source assembly 10 along the optical axis X is flush with the side of the total internal reflection collimating lens away from the light source assembly 10 along the optical axis X. An intermediate refractive body and multiple intermediate reflecting prisms are provided on the side of the intermediate collimating lens close to the light source assembly 10 along the optical axis X. The intermediate refractive body and multiple intermediate reflecting prisms all extend along the first direction P. The two sides of the intermediate refractive body along the first direction P are respectively connected to the refractive bodies 21 of the two total internal reflection collimating lenses. The two sides of the intermediate refractive body and the refractive bodies 21 in the total internal reflection collimating lens have the same shape and equal area along the first direction P. The cross sections of the intermediate refractive body perpendicular to the first direction P are all the same.

[0224] The two sides of the intermediate reflecting prism along the first direction P are respectively connected to the reflecting prisms 22 of the two total internal reflection collimating lenses. The two opposite sides of the intermediate reflecting prism and the reflecting prism 22 of the total internal reflection collimating lenses along the first direction P have the same shape and equal area; the cross-sections of the intermediate reflecting prism perpendicular to the first direction P are all the same. Optionally, the ring spacing D of the reflecting prism 22 is greater than or equal to 0.1 mm and less than or equal to 0.3 mm. A smaller ring spacing D allows multiple reflecting prisms 22 to be set in a smaller space, improving the collimation effect.

[0225] By splicing two total internal reflection collimating lenses together with an intermediate collimating lens, the distance between the two total internal reflection collimating lenses can be increased by changing the length of the intermediate collimating lens, making it convenient to adjust the distance between the two emitting light sources 11 corresponding to the total internal reflection collimating lenses.

[0226] In some embodiments, please refer to Figures 1 to 8 The camera-assisted illumination light distribution structure 100 with adjustable beam angle includes a light source assembly 10, a collimating lens 20, a first lens group 30, a light-blocking plate 40, a second lens group 50, and a zoom control assembly 70 arranged sequentially along the optical axis X. The light source assembly 10 is used to emit a first beam 61. The collimating lens 20 is a total internal reflection collimating lens. The side of the total internal reflection collimating lens away from the light source along the optical axis X is a plane. The side of the total internal reflection collimating lens close to the light source along the optical axis X is provided with a refractive body 21 and a plurality of annular reflecting prisms 22. The axis of the refractive body 21 coincides with the optical axis. The plurality of reflecting prisms 22 are arranged around the refractive body 21. The total internal reflection collimating lens is used to collimate the first beam 61 and direct it toward the first lens group 30. The first lens group 30 is used to converge the first beam 61 and emit the second beam 62. The first lens group 30 includes a plurality of first lens units 31. The plurality of first lens units 31 are arranged in an array on a plane perpendicular to the optical axis direction X. The first lens unit 31 is any one of an aspherical lens, a Fresnel lens, a planar diffractive optical lens, or a planar superlens.

[0227] The second lens group 50 is disposed on the side of the first lens group 30 away from the light source assembly 10 along the optical axis direction X. The second lens group 50 is used to refract the second beam 62 and emit a diverging third beam 63. The second lens group 50 includes a plurality of second lens units 51 corresponding to the first lens unit 31. The plurality of second lens units 51 are arranged in an array on a plane perpendicular to the optical axis direction X. The second lens units 51 are of the same type as the first lens unit 31. The zoom control component 70 is connected to the first lens group 30 and drives the first lens group 30 to move along the optical axis direction X to change the beam angle of the third beam 63; and / or, the zoom control component 70 is connected to the second lens group 50 and is used to drive the first lens group 30 and / or the second lens group 50 to move along the optical axis direction X to change the beam angle of the third beam 63.

[0228] The light-blocking plate 40 is provided with a plurality of light-transmitting holes 41, which correspond to a plurality of first lens units 31 and a plurality of second lens units 51 respectively.

[0229] A zoom control assembly 70 is connected to the second lens group 50. The zoom control assembly 70 drives the second lens group 50 to move along the optical axis X between a first position and a second position. The distance between the first position and the first lens group 30 is less than the distance between the second position and the first lens group 30. In the optical axis X, when the second lens group 50 is moved to the first position, the focal length of the first lens group 30 is greater than the distance between the optical center of the first lens group 30 and the second lens group 50. In the optical axis X, when the second lens group 50 is moved to the second position, the focal length of the first lens group 30 is less than the distance between the optical center of the first lens group 30 and the second lens group 50.

[0230] The second aspect of this application also provides a mobile terminal, which includes the adjustable beam angle camera-assisted lighting distribution structure 100 of any of the embodiments in the first aspect. The mobile terminal includes mobile phones, tablets, artificial intelligence devices, AR glasses (Augmented Reality Goggles), VR glasses (Virtual Reality Glasses), automobiles, robots, etc. Optionally, the zoom control component 70 in the adjustable beam angle camera-assisted lighting distribution structure 100 is electrically connected to the controller in the mobile terminal to facilitate automatic control of the zoom control component 70.

[0231] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application include the camera auxiliary lighting light distribution structure 100 with adjustable beam angle in the first aspect embodiment, which can change the area illuminated by the third beam 63 emitted by the mobile terminal according to actual needs. It can use a single light source to meet the lighting needs of wide-angle and telephoto photography of mobile phones, solve the technical problem of large light source volume on mobile phones, and improve the utilization efficiency of the light source. It has all the advantages of the camera auxiliary lighting light distribution structure 100 with adjustable beam angle.

[0232] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An auxiliary light distribution structure for video recording which is capable of adjusting the angle of a light beam, characterized in that, include: A light source assembly, the light source assembly including at least one emitting light source, the emitting light source being used to emit a first light beam; The first lens group is disposed on one side of the light source assembly along the optical axis, and the first lens group is used to converge the first beam and emit the second beam. The second lens group is disposed on the side of the first lens group away from the light source assembly along the optical axis. The second lens group is used to refract the second beam and emit the third beam. A zoom control assembly is connected to the second lens group and is used to drive the second lens group to move along the optical axis direction to change the beam angle of the third beam. And / or, Connected to the first lens group, the zoom control component is used to drive the first lens group to move along the optical axis direction to change the beam angle of the third beam.

2. The camera-assisted lighting distribution structure of claim 1, wherein, The adjustable beam angle camera-assisted lighting light distribution structure also includes a collimating lens, which is disposed between the light source assembly and the first lens group. The collimating lens is used to collimate the first beam and direct it toward the first lens group.

3. The camera-assisted lighting distribution structure of claim 2, wherein the light beam angle is adjustable by adjusting the angle of the light beam. The collimating lens is a total internal reflection collimating lens. The side of the total internal reflection collimating lens away from the light source assembly along the optical axis is a plane. A refractive element and multiple annular reflecting prisms are provided on the side of the total internal reflection collimating lens closer to the light source assembly along the optical axis. The axis of the refractive element coincides with the center line of the emitted light source, and the multiple reflecting prisms are arranged around the refractive element; or... The collimating lens is one of the following: an aspherical collimating lens, a superlens, and a diffractive optical element.

4. The camera-assisted illumination light distribution structure with adjustable beam angle as described in claim 1, characterized in that, The first lens group includes a plurality of first lens units, which are arranged in an array on a plane perpendicular to the optical axis. The second lens group includes a plurality of second lens units corresponding to the first lens unit, and the plurality of second lens units are arranged in an array on a plane perpendicular to the optical axis.

5. The camera-assisted illumination light distribution structure with adjustable beam angle as described in claim 4, characterized in that, The first lens unit is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens; And / or, the second lens unit is any one of a spherical lens, an aspherical lens, a Fresnel lens, a planar diffractive optical lens, and a planar superlens.

6. The camera-assisted illumination light distribution structure with adjustable beam angle as described in claim 4, characterized in that, Multiple first lens units are arranged in a rectangular array; multiple second lens units are arranged in a rectangular array.

7. The camera auxiliary illumination light distribution structure with adjustable beam angle as described in any one of claims 1-6, characterized in that, The zoom control component is connected to the second lens group, and the zoom control component is used to drive the second lens group to move between a first position and a second position along the optical axis direction, wherein the distance between the first position and the first lens group is less than the distance between the second position and the first lens group; In the optical axis direction, when the second lens group moves to the first position, the focal length of the first lens group is greater than the distance between the optical center of the first lens group and the second lens group; In the direction of the optical axis, when the second lens group moves to the second position, the focal length of the first lens group is less than the distance between the optical center of the first lens group and the second lens group.

8. The camera auxiliary illumination light distribution structure with adjustable beam angle as described in claim 7, characterized in that, The zoom control assembly includes a voice coil motor and / or a linear motor.

9. The camera auxiliary illumination light distribution structure with adjustable beam angle as described in any one of claims 4-6, characterized in that, The adjustable beam angle camera auxiliary lighting light distribution structure further includes a light-blocking plate disposed between the first lens group and the second lens group. The light-blocking plate is provided with a plurality of light-transmitting holes, each of which corresponds to a plurality of the first lens units and a plurality of the second lens units.

10. The camera-assisted illumination light distribution structure with adjustable beam angle as described in claim 9, characterized in that, The light-blocking plate is made of black material, and the thickness of the light-blocking plate along the optical axis is less than or equal to 0.2 mm; and / or, The aperture of the light-transmitting hole is less than or equal to 0.3 mm.

11. The camera-aided illumination light distribution structure with adjustable beam angle as described in any one of claims 2-6, characterized in that, The light source assembly includes two emitting light sources; the camera-assisted illumination light distribution structure with adjustable beam angle includes two spliced ​​collimating lenses, each of which corresponds to one of the two emitting light sources.

12. A mobile terminal, characterized in that, Includes a camera-assisted illumination light distribution structure with an adjustable beam angle as described in any one of claims 1-11.

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