A light homogenizing assembly, light supplementing unit and photographing device

Abstract

The utility model relates to a kind of light uniformity assembly, light supplement unit and photographic device, including reflecting lens and light uniformity plate, the reflecting lens has first light exit surface, one side of the light uniformity plate is second light exit surface, the other side of the light uniformity plate is provided with several light uniformity protrusions, the light uniformity plate is installed on the reflecting lens, to make the light uniformity protrusion be set towards the first light exit surface.

Description

Technical Field

[0001] This utility model relates to the field of fill lights, and in particular to a light-diffusing component, a fill light unit, and a shooting device. Background Technology

[0002] With the increasing prevalence of security equipment, the requirements for image clarity and operating environment of cameras are becoming more stringent. To ensure higher image clarity when cameras capture images at night, additional lighting devices are often required. However, these devices often suffer from glare, failing to meet the operational needs of cameras. Utility Model Content

[0003] Therefore, it is necessary to provide a light-diffusing component, a light-filling unit, and a shooting device to address the problem of glaring light emitted by the lighting devices in existing cameras.

[0004] A light-diffusing assembly includes a reflective lens and a light-diffusing plate. The reflective lens has a first light-emitting surface, one side of the light-diffusing plate is a second light-emitting surface, and the other side of the light-diffusing plate is provided with a plurality of light-diffusing protrusions. The light-diffusing plate is mounted on the reflective lens such that the light-diffusing protrusions are oriented toward the first light-emitting surface.

[0005] In one embodiment, at least a portion of the outer wall surface of the light-uniforming protrusion is a first light-uniforming surface, and the shape of the first light-uniforming surface is curved.

[0006] In one embodiment, the shape of the first uniform surface is a parabola, a truncated ellipsoid, a spherical cap, or a hemisphere.

[0007] In one embodiment, at least a portion of the outer wall surface of the light-uniforming protrusion is a second light-uniforming surface, the second light-uniforming surface is located at the edge of the first light-uniforming surface and is on the side of the first light-uniforming surface closer to the second light-emitting surface, the shape of the second light-uniforming surface is curved, and the edge of the first light-uniforming surface and the edge of the second light-uniforming surface are smoothly transitioned.

[0008] In one embodiment, there are multiple light-uniforming protrusions, and the edges of the second light-uniforming surfaces of two adjacent light-uniforming protrusions overlap and transition smoothly.

[0009] In one embodiment, the projection shape of the uniform light protrusion on the second light-emitting surface is a rectangle with an aspect ratio of 16:9-12:9, a length of 0.6mm-0.8mm, a height of 0.44mm-0.55mm, and a distance of 2mm-2.5mm between the vertex of the first uniform light surface and the second light-emitting surface.

[0010] In one embodiment, the shape of the first homogenizing surface satisfies the equation .

[0011] In one embodiment, the light-uniforming protrusion and the first light-emitting surface are spaced apart, and a gas medium is filled between the light-uniforming protrusion and the first light-emitting surface.

[0012] A supplementary lighting unit includes a light source and the light-uniforming component, wherein the light source is located at the incident surface of the reflective lens.

[0013] A shooting device includes a camera and the aforementioned supplementary lighting unit.

[0014] The beneficial effects of this utility model are as follows:

[0015] The light emitted by the light source of the supplementary lighting unit passes sequentially through the incident surface of the reflective lens, the first light-emitting surface, the light-uniforming protrusion, and the second light-emitting surface. Before the light is emitted from the first light-emitting surface, it is subjected to the first light-uniforming effect of the reflective lens. The light will be subjected to the second light-uniforming effect on the surface of the light-uniforming protrusion. Through the two light-uniforming effects, the light uniformity at the second light-emitting surface is fully improved, and the glare of the light is reduced. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the supplementary lighting unit in an embodiment of the present invention;

[0017] Figure 2 This is a light intensity distribution diagram at the first light-emitting surface in an embodiment of this utility model;

[0018] Figure 3 This is a top view of the first light-emitting surface in an embodiment of the present invention;

[0019] Figure 4 This is a side view of the uniform light plate in an embodiment of the present invention.

[0020] Figure 5 for Figure 4 A magnified schematic diagram of the central part of the structure;

[0021] Figure 6 This is an optical path diagram at the light-diffusing plate in an embodiment of this utility model;

[0022] Figure 7 The shape of the light spot formed by a single uniform light protrusion at the second light-emitting surface in this embodiment of the present invention;

[0023] Figure 8 This refers to the shape of the light spot formed across the entire second light-emitting surface in this embodiment of the invention.

[0024] Figure 9 This is a brightness test diagram at different positions on one of the diameters of the first light-emitting surface in this embodiment of the present invention.

[0025] Figure label:

[0026] 1. Reflecting lens; 11. First light-emitting surface; 12. Incident surface; 2. Beam homogenizer; 21. Second light-emitting surface; 22. Beam homogenizer protrusion; 221. First beam homogenizer surface; 222. Second beam homogenizer surface; 3. Gas medium; 4. Light source. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Example:

[0034] like Figure 1 As shown, this embodiment provides a supplementary lighting unit, including a light source 4 and a light-diffusing assembly. The light-diffusing assembly includes a reflective lens 1 and a light-diffusing plate 2.

[0035] Specifically, the reflecting lens 1 can be a TIR lens, which has at least a first light-emitting surface 11 and an incident surface 12. The light source 4 is located at the incident surface 12 of the reflecting lens 1. The light emitted by the light source 4 enters the reflecting lens 1 through the incident surface 12 and then exits from the first light-emitting surface 11. Based on the shape characteristics of the reflecting lens 1, the reflecting lens 1 can perform initial light homogenization on the light emitted by the light source 4.

[0036] like Figure 3 As shown, the first light-emitting surface 11 is generally circular in shape, and its radius is [missing information]. The center of the circle is point O. N (N≥2) concentric circular boundary lines are defined on the first light-emitting surface 11. The boundary lines of each concentric circle are all centered at point O. The concentric circle boundary lines divide the first light-emitting surface 11 into Each area, from the inside out, is... The radius of the concentric circles , The boundary line of the Nth concentric circle is the outer perimeter of the first light-emitting surface 11.

[0037] like Figure 2 As shown, A iThe distance between point A and point O is R, A i The angle between the line connecting point O and point O and the central axis of the first light-emitting surface 11 is . A i The projection of the point on the central axis of the first light-emitting surface 11 falls on the aforementioned radius. On the concentric circle boundary line, the light intensity at a point R away from point O on the central axis of the first light-emitting surface 11 is... Correspondingly, A i Light intensity at point .

[0038] Preferably, the first light-emitting surface 11 can be set as a light surface, and the structural parameters of the reflecting lens 1 can further satisfy the following relationship: , .

[0039] Specifically, in this embodiment, the shape of the incident surface 12 satisfies the equation , , , Based on this relationship, the light emission uniformity at the first light-emitting surface 11 can be further improved (≥50%), and the light emission angle at the first light-emitting surface 11 can be limited to between 0° and 5°.

[0040] In this embodiment, the lens aperture (i.e., the diameter of the first light-emitting surface 11) is not less than 12mm, and the height of the reflecting lens 1 is not less than 8.5mm.

[0041] See Figure 1 and Figure 4 One side of the light-diffusing plate 2 is the second light-emitting surface 21, and the other side of the light-diffusing plate 2 is provided with a plurality of light-diffusing protrusions 22. The light-diffusing plate 2 is mounted on the reflecting lens 1 so that the light-diffusing protrusions 22 are oriented toward the first light-emitting surface 11.

[0042] like Figure 6 As shown, the light emitted from the first light-emitting surface 11 will be incident on the surface of the light-uniforming protrusion 22. After being subjected to the secondary light-uniforming effect of the light-uniforming protrusion 22, it will be emitted from the second light-emitting surface 21. In other words, the light emitted from the second light-emitting surface 21 has been subjected to at least two light-uniforming effects, and the uniformity has been greatly improved, which can effectively reduce the glare of the light.

[0043] like Figure 5 As shown, at least part of the outer wall surface of the light-uniforming protrusion 22 is a first light-uniforming surface 221, which can achieve the effect of light uniformity.

[0044] Preferably, the first uniform surface 221 is curved. More preferably, the first uniform surface 221 is parabolic, truncated ellipsoid, spherical cap, or hemispherical. A truncated ellipsoid refers to the curved surface obtained by cutting the ellipsoid with a plane parallel to its central axis.

[0045] Furthermore, at least a portion of the outer wall surface of the light-uniforming protrusion 22 is a second light-uniforming surface 222, which is also curved to achieve a certain degree of light uniformity. The second light-uniforming surface 222 is located at the edge of the first light-uniforming surface 221, and the edge of the first light-uniforming surface 221 and the edge of the second light-uniforming surface 222 transition smoothly. The second light-uniforming surface 222 is located on the side of the first light-uniforming surface 221 closer to the second light-emitting surface 21, thereby appropriately improving the light-gathering and cutoff effect while ensuring the uniformity of light emission at the second light-emitting surface 21.

[0046] Further preferably, there are multiple light-uniforming protrusions 22, which are arranged in a rectangular array on the surface of the light-uniforming plate 2. For two adjacent light-uniforming protrusions 22, the edge of the second light-uniforming surface 222 of one light-uniforming protrusion 22 coincides with the edge of the second light-uniforming surface 222 of the other light-uniforming protrusion 22, and the two second light-uniforming surfaces 222 are smoothly transitioned to further improve the light-uniforming effect of the light-uniforming protrusions 22.

[0047] The projection shape of the uniform light protrusion 22 onto the second light-emitting surface 21 along the normal of the second light-emitting surface 21 is rectangular. The aspect ratio of the rectangle is 16:9-12:9, the length of the rectangle is 0.6mm-0.8mm, the height of the uniform light protrusion 22 is 0.44mm-0.55mm, and the distance between the vertex of the first uniform light surface 221 and the second light-emitting surface 21 is 2mm-2.5mm.

[0048] Preferably, in this embodiment, the light-uniforming protrusion 22 and the first light-emitting surface 11 are spaced apart, and a gas medium 3 is filled between the light-uniforming protrusion 22 and the first light-emitting surface 11. During the process of light emanating from the first light-emitting surface 11 and incident on the surface of the light-uniforming protrusion 22, the gas medium 3 can also play a light-uniforming effect, thereby further increasing the light emission uniformity at the second light-emitting surface 21.

[0049] For example, in this embodiment, the aspect ratio of the rectangle is 16:9, the length of the rectangle is 0.75mm, the height of the uniform light protrusion 22 is 0.55mm, and the distance between the vertex of the first uniform light surface 221 and the second light-emitting surface 21 is 2.46mm. The shape of the first uniform light surface 221 satisfies the equation z1=3.556y1. 2 +4.498x1 2 ,in , The second uniform light surface 222 has a saddle-shaped surface. The gas medium 3 is air, and its thickness (equal to the distance between the vertex of the first uniform light surface 221 and the first light-emitting surface 11) is 0.55 mm. Figure 7 As shown, in this embodiment, the shape of the light spot formed by each uniform light protrusion 22 at the second light-emitting surface 21 can well match the projection shape of the uniform light protrusion 22 on the second light-emitting surface 21, and the light spot uniformity is good. Further combined with... Figure 8 and Figure 9 It can be seen that the overall light emission uniformity at the second light-emitting surface 21 in this embodiment is relatively high. Figure 9 The horizontal axis represents the distance between a point on the diameter of the first light-emitting surface 11 and point O, and the vertical axis represents the brightness of that point.

[0050] Furthermore, this embodiment also provides a shooting device, including a camera and a supplementary light unit, which can provide illumination to the subject, thereby improving the imaging quality of the camera.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A light-uniforming component, characterized in that, The device includes a reflective lens (1) and a light-diffusing plate (2). The reflective lens (1) has a first light-emitting surface (11). One side of the light-diffusing plate (2) is a second light-emitting surface (21). The other side of the light-diffusing plate (2) is provided with a plurality of light-diffusing protrusions (22). The light-diffusing plate (2) is mounted on the reflective lens (1) so that the light-diffusing protrusions (22) are arranged facing the first light-emitting surface (11).

2. The light-diffusing component according to claim 1, characterized in that, At least part of the outer wall surface of the uniform light protrusion (22) is a first uniform light surface (221), and the first uniform light surface (221) is curved.

3. The light-diffusing component according to claim 2, characterized in that, The first uniform surface (221) is in the shape of a parabola, a truncated ellipsoid, a spherical cap, or a hemispherical surface.

4. The light-diffusing component according to claim 3, characterized in that, At least part of the outer wall surface of the uniform light protrusion (22) is a second uniform light surface (222). The second uniform light surface (222) is located at the edge of the first uniform light surface (221) and is on the side of the first uniform light surface (221) close to the second light-emitting surface (21). The shape of the second uniform light surface (222) is curved, and the edge of the first uniform light surface (221) and the edge of the second uniform light surface (222) are smoothly transitioned.

5. The light-diffusing component according to claim 4, characterized in that, There are multiple uniform light protrusions (22), and the edges of the second uniform light surface (222) of two adjacent uniform light protrusions (22) overlap and transition smoothly.

6. The light-diffusing component according to claim 5, characterized in that, The projection shape of the uniform light protrusion (22) on the second light-emitting surface (21) is a rectangle with an aspect ratio of 16:9-12:9, a length of 0.6mm-0.8mm, a height of 0.44mm-0.55mm, and a distance of 2mm-2.5mm between the vertex of the first uniform light surface (221) and the second light-emitting surface (21).

7. The light-diffusing component according to claim 2, characterized in that, The shape of the first uniform surface (221) satisfies the equation .

8. The light-diffusing component according to claim 1, characterized in that, The light-uniforming protrusion (22) and the first light-emitting surface (11) are spaced apart, and the space between the light-uniforming protrusion (22) and the first light-emitting surface (11) is filled with a gas medium (3).

9. A supplementary lighting unit, characterized in that, Includes a light source (4) and a light-diffusing assembly as described in any one of claims 1-8, wherein the light source (4) is located at the incident surface (12) of the reflecting lens (1).

10. A shooting device, characterized in that, It includes a camera and the supplementary lighting unit as described in claim 9.

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