Variable-focus illumination structure and light supplement lamp

Abstract

The utility model discloses a variable-focus illumination structure and a light supplement lamp, and relates to the field of illumination, a driving device can change the distance between a variable-focus lens and a light source, light rays emitted by the light source are transmitted to the edge direction of the variable-focus lens under refraction of the variable-focus lens, the variable-focus lens collimates the light rays emitted by the light source, and the light rays emitted by the variable-focus lens are transmitted to the light supplement lamp. The light rays are irradiated at the edge position of the zoom lens in a state of being approximately parallel to the main optical axis of the zoom lens, so that scattering of the light rays in the process of irradiating a target area is reduced; the light supplementing lamp with the variable-focus illumination structure can converge in a target area to form an obvious annular light spot in a boundary area, and the shooting effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a variable-focus lighting structure capable of adjusting the size of a lighting area and a fill light comprising the variable-focus lighting structure. Background Art

[0002] With the continuous development of technology, camera equipment needs to shoot in different scenes, and different shooting fields of view are required in different scenes, that is, different shooting ranges are selected according to different shooting scenes. Especially when shooting in an environment with poor brightness, a lighting structure matched with the camera equipment is needed to illuminate the range to be shot. Current camera equipment is generally only equipped with one lighting structure, and its field of view angle is fixed. Therefore, it cannot meet the needs of different shooting ranges, and the edge boundary of the annular light spot formed by the lighting structure is not clear, the lighting effect is poor, and the shooting effect is reduced. Utility Model Content

[0003] One of the purposes of the present invention is to provide a variable-focus lighting structure to solve the problems existing in the above-mentioned prior art, so that the size of the lighting area can be changed with the size of the shooting field angle, and at the same time, the clarity of the boundary of the lighting area is improved, thereby improving the lighting and shooting effects.

[0004] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a variable focus lighting structure, comprising a light source, a zoom lens, and a driving device; the driving device can change the axial distance between the light source and the zoom lens along the main optical axis;

[0005] The zoom lens includes: an incident surface, a first reflection surface, a second reflection surface, and a light-emitting surface; the incident surface, the first reflection surface, and the light-emitting surface are arranged in sequence along the main optical axis direction of the zoom lens, a second reflection surface is arranged between the incident surface and the first reflection surface, and can reflect light to the light-emitting surface; a light source is arranged on one side of the incident surface of the zoom lens, and the center of the light source coincides with the main optical axis of the zoom lens.

[0006] Furthermore, it also includes a light-blocking plate arranged at intervals from the light-emitting surface, the light-blocking plate is arranged on the light-emitting side of the light-emitting surface of the zoom lens, and the center of the light-blocking plate coincides with the main optical axis of the zoom lens; the light-blocking plate includes an inner light-blocking structure and an outer light-blocking structure, the inner light-blocking structure is arranged on the inner side of the outer light-blocking structure, and a light-transmitting area is formed between the inner light-blocking structure and the outer light-blocking structure.

[0007] Furthermore, a covering layer for shielding the outgoing light is provided on the light-emitting surface of the zoom lens, so that a light-transmitting area is formed on the zoom lens.

[0008] Furthermore, the driving device is connected to the zoom lens to drive the zoom lens to move along the direction of the main optical axis of the zoom lens.

[0009] Furthermore, the driving device is connected to the light source to drive the light source to move along the main optical axis direction of the zoom lens.

[0010] Furthermore, the light emitting surface is a smooth surface.

[0011] Furthermore, it also includes a PCB circuit board, which is arranged on a side of the light source away from the zoom lens, and the PCB circuit board is connected to the light source and an external power supply through a wire.

[0012] Another purpose of the present invention is to provide a fill light, wherein the lighting part in the fill light is the above-mentioned variable-focus lighting structure.

[0013] Compared with the prior art, the utility model has achieved the following technical effects:

[0014] The zoom lens folds the light path of light emitted by the light source through the incident surface, the first reflective surface, the second reflective surface, and the light exiting surface, thereby collimating the light while reducing the thickness of the zoom lens, thereby reducing the overall thickness of the illumination structure. The driving device can change the distance between the zoom lens and the light source. The light emitted by the light source folds the light path through the zoom lens and transmits it toward the edge of the zoom lens. The zoom lens collimates the light emitted by the light source and emits it at the edge of the zoom lens in a state approximately parallel to the main optical axis of the zoom lens, reducing scattering of the light when it reaches the target area. The light converges at the target area to form a distinct annular light spot at the boundary, thereby improving the imaging effect. When the distance between the zoom lens and the light source is minimized, the light spot formed in the target area is minimized. As the driving device drives the zoom lens gradually away from the light source, the intersection point of the light emitted by the zoom illumination structure moves toward the zoom illumination structure. The light refracted by the exiting surface of the zoom lens converges at the intersection point and continues to transmit toward the target area. As the distance between the zoom lens and the light source increases, the diameter of the annular light spot in the target area gradually increases, and the illumination range gradually increases. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is an overall schematic diagram of the variable-focus lighting structure disclosed in Example 1 of the present utility model;

[0017] Figure 2Schematic diagram of light propagation when the distance between the zoom lens and the light source is at the shortest possible state in the variable-focus lighting structure disclosed in the first embodiment of the present invention;

[0018] Figure 3 Schematic diagram of light propagation in a state where the zoom lens gradually moves away from the light source in the variable-focus lighting structure disclosed in the first embodiment of the present invention;

[0019] Figure 4 Schematic diagram of light propagation in a state where the distance between the zoom lens and the light source is the farthest in the variable-focus lighting structure disclosed in the first embodiment of the present invention;

[0020] Figure 5 Schematic diagram of light propagation when the distance between the zoom lens and the light source is the shortest in the variable-focus lighting structure disclosed in the second embodiment of the present invention;

[0021] Figure 6 Schematic diagram of light propagation in a state where the light source gradually moves away from the zoom lens in the variable-focus lighting structure disclosed in the second embodiment of the present utility model;

[0022] Figure 7 Schematic diagram of light propagation when the distance between the light source and the zoom lens in the variable-focus lighting structure disclosed in the second embodiment of the present invention is the longest;

[0023] Figure 8 Schematic diagram of an annular light spot formed in a target area when the zoom lens and the light source are at their closest distance in the variable-focus lighting structure disclosed in Example 1 of the present utility model;

[0024] Figure 9 Schematic diagram of an annular light spot formed in a target area when the zoom lens gradually moves away from the light source in the variable-focus lighting structure disclosed in Example 1 of the present utility model;

[0025] Figure 10 This is a schematic diagram of an annular light spot formed in a target area when the distance between the zoom lens and the light source in the variable-focus lighting structure disclosed in the first embodiment of the present invention is the farthest.

[0026] Description of reference numerals:

[0027] 1. Light-blocking plate; 1-1. Internal light-blocking structure; 1-2. External light-blocking structure; 1-3. Light-transmitting area; 2. Zoom lens; 2-1. Incident surface; 2-2. First reflection surface; 2-3. Second reflection surface; 2-4. Light-emitting surface; 3. Light source; 4. PCB circuit board; 5. Light spot. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] The purpose of the utility model is to provide a variable-focus lighting structure to solve the problems existing in the prior art and to change the size of the annular light spot in the target area according to different needs.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0031] Please refer to Figure 1 The zoom lighting structure includes: a zoom lens 2 and a driving device. The manufacturing method of the zoom lens 2 includes but is not limited to a method of grinding and molding a whole piece of glass or injecting a molten resin material into a mold, and the zoom lens 2 is a rotating body formed with the main optical axis AA as the axis; the incident surface 2-1, the first reflection surface 2-2, and the light-emitting surface 2-4 in the zoom lens 2 are arranged in sequence on the main optical axis along the direction of the light emitted by the zoom lens 2. The driving device can adjust the distance between the zoom lens 2 and the light source 3. The light emitted by the light source 3 is collimated by the zoom lens 2, that is, the incident surface 2-1 in the zoom lens 2 refracts the divergent light from the light source 3, and then reflects it in sequence through the first reflection surface 2-2 and the second reflection surface 2-3, and finally emits it through the light-emitting surface 2-4 of the zoom lens 2, so as to maintain uniform light intensity in the illuminated area of ​​the target area and form a light spot 5 of a set shape in the target area. The light spot 5 is the illumination range of the target area.

[0032] Example 1:

[0033] In this embodiment, the connection between the driving device and the zoom lens 2 can be either a fixed connection or a transmission connection, as long as it can drive the zoom lens 2 to move along the main optical axis AA; the driving device drives the zoom lens 2 to move along the main optical axis of the zoom lens 2 and thereby changes the distance between the zoom lens 2 and the light source 3, such as Figures 2 to 4 As shown;

[0034] When the driving device controls the zoom lens 2 to be in the initial position, the distance between the zoom lens 2 and the light source 3 is h1. At this time, the distance between the zoom lens 2 and the light source 3 is the smallest. The light passes through the incident surface 2-1 in the zoom lens 2, is reflected by the first reflection surface 2-2 and the second reflection surface 2-3, and is finally emitted by the light-emitting surface 2-4 of the zoom lens 2. Since the angle between the light-emitting light and the main optical axis AA is small, the light-emitting light emitted by the light-emitting surface 2-4 is close to the main optical axis AA at a position close to the light-emitting surface 2-4, that is, the angle between the light-emitting light and the main optical axis AA is close to 0°. Due to the short distance, the angle between the light-emitting light and the main optical axis AA cannot be clearly represented in the schematic diagram, as shown in FIG. Figure 2 As shown; in the target area farther away from the light emitting surface 2-4, the light spot 5 formed by the light emitting light converging in the target area is as shown Figure 8 As shown, the angle between the light ray and the main optical axis AA can be clearly observed, and the illumination range of the variable focus illumination structure is the smallest at this time;

[0035] The driving device drives the zoom lens 2 to gradually move away from the light source 3, so that the distance between the zoom lens 2 and the light source 3 is h2. Figure 3 As shown, after the light from the light source 3 is collimated by the zoom lens 2, the light emitted from the light-emitting surface 2-4 of the zoom lens 2 converges in the direction of the main optical axis of the zoom lens 2, so that the intersection point of the light rays moves toward the direction close to the zoom lens 2 and forms an angle of θ2 with the main optical axis AA. After converging at the intersection point, the light rays continue to propagate forward along the original path. The propagation path of the light rays is shown in FIG. Figure 9 As shown, a light spot 5 is finally formed in the target area. At this time, the illumination range of the variable-focus illumination structure is larger than the illumination range when the distance between the zoom lens 2 and the light source 3 is h1;

[0036] The driving device continues to drive the zoom lens 2 away from the light source 3, and the distance between the zoom lens 2 and the light source 3 reaches h3. Figure 4 As shown, at this time, the distance between the zoom lens 2 and the light source 3 reaches its maximum, and the point where the outgoing light rays intersect continues to approach the zoom lens 2. An angle θ3 is formed between the outgoing light rays and the main optical axis AA. After converging at the intersection point, the outgoing light rays continue to propagate forward along the original path. The outgoing light rays form a light spot 5 in the target area, as shown in FIG. Figure 10 As shown; at this time, the illumination range of the variable-focus illumination structure reaches its maximum.

[0037] The angle θ between the light emitting light of the light emitting surface 2-4 and the main optical axis AA varies in the range of 0° to 60°, preferably 0° to 46°. The boundary of the light spot 5 is clearest in this area, thereby ensuring the shooting effect.

[0038] When the distance between the zoom lens 2 and the light source 3 changes continuously from h1 to h3, the angle θ between the light ray and the main optical axis AA will also change continuously within the range of 0° to 60°, so that a light spot 5 of any size can be formed in the target area to meet the needs of different shooting ranges.

[0039] A light blocking plate 1 is further provided on the other side of the zoom lens 2, i.e., on the opposite side of the light source 3, and the center of the light blocking plate 1 coincides with the main optical axis AA of the zoom lens 2. The light blocking plate 1 includes an inner light blocking structure 1-1 and an outer light blocking structure 1-2. The area between the inner light blocking structure 1-1 and the outer light blocking structure 1-2 forms a light-transmitting area 1-3. After the outgoing light is blocked by the inner light blocking structure 1-1 and the outer light blocking structure 1-2, it passes through the light-transmitting area 1-3 to form a light spot 5 of a set shape in the target area. According to actual needs, by replacing the light blocking plate 1 with a different light-transmitting area 1-3, light spots 5 of different shapes, such as circle, hexagon, rectangle, ellipse, etc., can be formed in the target area.

[0040] In order to reduce the overall thickness of the variable-focus lighting structure, a covering layer can be directly set on the surface of the light-emitting surface 2-4. The covering layer is used to block the outgoing light to form a light-transmitting area 1-3 of a set shape on the light-emitting surface 2-4. The methods of setting the covering layer on the surface of the light-emitting surface 2-4 include coating, spraying and other processes.

[0041] The power supply part of the zoom lighting structure can use a PCB circuit board 4. The external power supply is electrically connected to the light source 3 through the PCB circuit board 4. The PCB circuit board 4 replaces complex wiring, making it convenient to replace and repair the PCB circuit board 4 after damage. At the same time, the PCB circuit board 4 can also reduce the volume of the zoom lighting structure, reduce product costs, and improve the reliability and product quality of the electronic equipment.

[0042] In order to reduce stray light emitted from the light exit surface of the zoom lens 2, increase light energy utilization, and make the boundary of the light spot 5 in the target area more obvious, it is preferred that the light exit surface 2-4 of the zoom lens 2 is set to a smooth surface.

[0043] Example 2

[0044] The difference between this embodiment and the first embodiment is that the driving device is connected to the light source 3. The connection method is not limited. The driving device drives the light source 3 to move along the main optical axis of the zoom lens 2 to change the distance between the zoom lens 2 and the light source 3. Figures 5 to 7 As shown;

[0045] like Figure 5 As shown, the light source 3 is at the initial position, and the distance between the zoom lens 2 and the light source 3 is h11. At this time, the distance between the zoom lens 2 and the light source 3 is the smallest, the outgoing light beam is close to parallel to the main optical axis AA, and the angle between the outgoing light beam and the main optical axis AA is close to 0°. At this time, the fill light range is the smallest.

[0046] As the driving device drives the light source 3 to gradually move away from the zoom lens 2, as shown in FIG. Figure 6 As shown, the distance between the zoom lens 2 and the light source 3 is h22. At this time, the distance between the zoom lens 2 and the light source 3 gradually increases, and the angle θ between the outgoing light beam and the main optical axis AA gradually increases. At this time, the angle is θ22, and the point where the outgoing light beam converges in front of the zoom lens 2 approaches the direction of the zoom lens 2, and the fill light range gradually expands.

[0047] The driving device continues to drive the light source 3 away from the zoom lens 2, and the distance between the zoom lens 2 and the light source 3 reaches h33. At this time, the distance between the zoom lens 2 and the light source 3 reaches the maximum, and the angle formed by the light rays emitted from the light-emitting surface 2-4 of the zoom lens 2 and the main optical axis AA is θ33. The intersection point of the light rays continues to approach the direction of the zoom lens 2. After converging at the intersection point, the light rays continue to be transmitted along the original path and form a light spot 5 in the target area. At this time, the illumination range of the zoom lighting structure reaches the maximum.

[0048] When the driving device drives the zoom lens 2 or the light source 3, the change of the angle between the light ray and the main optical axis AA is the same. Therefore, in this embodiment, as the driving device drives the light source 3 to move along the main optical axis AA, the size of the light spot 5 changes. Figures 8 to 10 The same changes are shown in .

[0049] Similarly, the angle θ between the light emitting light of the light emitting surface 2-4 and the main optical axis AA varies in the range of 0° to 60°, preferably 0° to 46°. Figures 5 to 7 As shown, when the distance between the zoom lens 2 and the light source 3 changes infinitely from h11 to h33, the angle θ between the outgoing light and the main optical axis AA will also change infinitely from 0° to 60°, so that the size of the light spot 5 formed in the target area will also change infinitely from small to large.

[0050] Other structures not described in the second embodiment of the present invention can be set with reference to the first embodiment.

[0051] A fill light is provided with the above-mentioned variable focus lighting structure. The driving device causes the distance between the zoom lens 2 and the light source 3 to be infinitely changed, so that the size of the annular light spot 5 in the target area is infinitely changed.

[0052] Adaptive changes based on actual needs are all within the protection scope of this utility model.

[0053] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims, not the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A variable focus lighting structure, comprising a light source (3), a zoom lens (2), and a driving device; characterized in that: The driving device is capable of changing the axial distance between the light source (3) and the zoom lens (2) along the main optical axis; The zoom lens (2) comprises: an incident surface (2-1), a first reflection surface (2-2), a second reflection surface (2-3), and a light-emitting surface (2-4); the incident surface (2-1), the first reflection surface (2-2), and the light-emitting surface (2-4) are arranged in sequence along the main optical axis direction of the zoom lens (2); a second reflection surface (2-3) capable of reflecting light to the light-emitting surface (2-4) is arranged between the incident surface (2-1) and the first reflection surface (2-2); the light source (3) is arranged on the side of the zoom lens (2) where the incident surface (2-1) is arranged, and the center of the light source (3) coincides with the main optical axis of the zoom lens (2).

2. The variable focus lighting structure according to claim 1, characterized in that: The invention also includes a light blocking plate (1) spaced apart from the light emitting surface (2-4), wherein the light blocking plate (1) is arranged on the light emitting side of the light emitting surface (2-4) of the zoom lens (2), and the center of the light blocking plate (1) coincides with the main optical axis of the zoom lens (2); the light blocking plate (1) includes an inner light blocking structure (1-1) and an outer light blocking structure (1-2), wherein the inner light blocking structure (1-1) is arranged on the inner side of the outer light blocking structure (1-2), and a light-transmitting area (1-3) is formed between the inner light blocking structure (1-1) and the outer light blocking structure (1-2).

3. The variable focus lighting structure according to claim 1, characterized in that: A covering layer for shielding the outgoing light is provided on the light-emitting surface (2-4) of the zoom lens (2), so that a light-transmitting area (1-3) is formed on the zoom lens (2).

4. The variable focus lighting structure according to claim 1, characterized in that: The driving device is connected to the zoom lens (2) and drives the zoom lens (2) to move along the direction of the main optical axis of the zoom lens (2).

5. The variable focus lighting structure according to claim 1, characterized in that: The driving device is connected to the light source (3) and drives the light source (3) to move along the main optical axis direction of the zoom lens (2).

6. The variable focus lighting structure according to claim 1, characterized in that: The light-emitting surface (2-4) is a smooth surface.

7. The variable focus lighting structure according to claim 1, characterized in that: It also includes a PCB circuit board (4), which is arranged on a side of the light source (3) away from the zoom lens (2), and the PCB circuit board (4) is connected to the light source (3) and an external power supply via a wire.

8. A fill light, characterized in that: The lighting part in the fill light is provided with a variable-focus lighting structure as described in any one of claims 1-7.

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