Photographic light source transfer device based on light guide fiber

Abstract

The photographing light source transfer device comprises a light source main body and a light control accessory which are arranged in a split mode, and a light emitting unit is arranged in the light source main body; the light guide optical fiber is a flexible optical fiber cable, the two ends of the light guide optical fiber are connected with assembling blocks with optical interfaces, and the two assembling blocks are assembled with the light output end of the light source main body and the light input end of the light control accessory through detachable connecting structures respectively; the wire diameter of the light guide optical fiber is not larger than the minimum outer diameter of the light control accessory, and the light guide optical fiber transmits light emitted by the light source body to the light control accessory based on the total reflection principle. In this way, the light control accessory becomes the only part needing to be placed in the shooting environment, only the weight and the size of the light control accessory need to be considered, and the overall equivalent weight and the equivalent occupied space of the photoflood lamp are remarkably reduced. The light control accessory can go deep into narrow areas, other rooms, underwater or cliffs and other places where conventional lamps are difficult to reach, and light distribution is carried out.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of photographic lamps, and particularly to a light source transfer device for photography based on a light guide fiber. BACKGROUND

[0002] The existing photographic lamps are generally designed in a mode of combination of a light-emitting light source body and a light control accessory in a rigid mechanical structure. Some photographic lamps are externally provided with support rods or tripods below. The rigid connection of the light source body and the light control accessory such as a light cover leads to a relatively large volume of the entire photographic lamp and a relatively long axial dimension. Although this can meet the lighting requirements of most photographic scenes, the volume disadvantage of the existing photographic lamps is exposed when the photographic lighting is required for some non-standard scenes such as narrow indoor scenes, scenes with many obstacles or scenes requiring dynamic lighting for film and television shooting.

[0003] These problems lead to poor performance of the existing photographic lamps in narrow and complex scenes, and there is an urgent need for a more flexible and compact photographic lamp to meet such lighting requirements. CONTENT OF THE INVENTION

[0004] The present application is made in view of the above state of the art. The purpose of the present application is to provide a light source transfer device for photography based on a light guide fiber.

[0005] The technical solution adopted by the present application comprises: a light source body and a light control accessory which are arranged separately from each other, and a light-emitting unit is arranged in the light source body; a light guide fiber which is a flexible fiber cable, two ends of the light guide fiber are connected with assembly blocks provided with optical interfaces, and the two assembly blocks are assembled with a light output end of the light source body and a light input end of the light control accessory through detachable connection structures; wherein the wire diameter of the light guide fiber is not greater than the minimum outer diameter of the light control accessory, and the light guide fiber transmits the light emitted by the light source body to the light control accessory based on the principle of total reflection.

[0006] As a further improvement of the present application, the light source body and the light control accessory are directly assembled or indirectly assembled with the help of the light guide fiber; when the light source body and the light control accessory are directly assembled, the assembly form of the light source body and the light control accessory is a direct disassembly structure, and the direct disassembly structure and the detachable connection structure are the same specifications of interface shapes.

[0007] As a further improvement of the present application, the detachable connection structure is one of a buckle connection, a threaded connection and a magnetic attraction connection; the detachable connection structure in the form of the buckle connection comprises a receiving ring and a locking ring, the receiving ring is provided with a plurality of L-shaped slots in the circumferential direction, the locking ring is provided with a plurality of protrusions in the circumferential direction, and the protrusions and the L-shaped slots are mechanically interlocked by axial docking and circumferential rotation.

[0008] As a further improvement of the present application, the light source body is connected with a support frame, and the assembly block directly assembled with the light control accessory is also connected with a support frame.

[0009] As a further improvement of the present application, the support frame comprises a U-shaped frame, the bottom of the U-shaped frame is provided with a downward extending column, the two ends of the top of the U-shaped frame are connected with the light source body or the two sides of the assembly block through a shaft, and the top of the U-shaped frame is also provided with a handle bolt, which can lock the rotation freedom degree of the support frame and the light source body or the assembly block.

[0010] As a further improvement of the present application, the assembly block comprises a rear assembly block capable of being directly assembled with the light source body, and a front assembly block capable of being directly assembled with the light control accessory, and the local detachable connection structure of the rear assembly block and the front assembly block can be complementarily assembled.

[0011] As a further improvement of the present application, the light guide fiber comprises a fiber bundle composed of a plurality of fiber filaments, and the fiber bundle is wrapped with a sheath, the sheath limits the minimum limit bending radius of the light guide fiber through the elastic force, and the light guide fiber under the minimum limit bending radius satisfies the critical angle condition of total reflection of light.

[0012] As a further improvement of the present application, the light guide column is provided at both ends of the light guide fiber, the assembly block is provided with an axial through cavity for accommodating the light guide column, and the diameter of the light guide column gradually decreases in the direction close to the light guide fiber; the shape of the light guide column is a circular truncated cone or a prismatic truncated cone.

[0013] As a further improvement of the present application, the light guide column comprises a rear light guide column capable of being connected with the light source body, and a front light guide column capable of being connected with the light control accessory; the light source body is provided with an emission lens, one side of the rear light guide column is provided with a concave surface capable of being matched with the emission lens, and the rear light guide column and the emission lens are seamlessly matched through refractive index matching glue; and / or one side of the front light guide column away from the rear light guide column is provided with a texture.

[0014] As a further improvement of the present application, the control of light by the light control accessory comprises at least one or a combination of multiple of reflection, refraction, scattering, absorption and transmission; the light control accessory comprises at least one or a combination of multiple of an adapter, a parallel light cover, an imaging lens, a Fresnel lens, a light returning lamp cover, a soft light box, a light beam cylinder and a honeycomb grid.

[0015] The beneficial effects of the light source transfer device for photography based on the light guide fiber of the present application include:

[0016] Firstly, the light source body and the light control accessory are arranged separately, and the flexible light guide fiber is used to connect the two, so that the light control accessory can be the only component placed in the shooting environment, and only the weight and volume of the light control accessory need to be considered, thereby significantly reducing the equivalent weight and equivalent space occupied by the overall photographic lamp. In this way, the light control accessory can be placed in narrow areas, other rooms, underwater or cliffs, and other places where conventional lamps cannot reach, and lighting can be performed. The light source body is arranged remotely through the light guide fiber, and the relatively slender shape of the light guide fiber also facilitates passing through various complex photographic environments. The light control accessory of the present application does not have an independent light source, but only defines a specific lighting area. The final light emitting surface is changed, and the actual use effect is equivalent to transferring the final light source.

[0017] Secondly, the light guide fiber is used to guide the light emitted by the light source body from one end to the other end, and the total reflection transmission mechanism of the light guide fiber can maintain the transmission efficiency of the light.

[0018] Thirdly, the detachable connection structure realizes the modular and rapid assembly of the light source body, the light guide fiber and the light control accessory, which is convenient for transportation and maintenance.

[0019] In addition, compared with using a point light source such as a micro-LED light source or a micro light source, which has a small size, to meet the lighting needs of narrow scenes, although the micro light source has a small size, it is also limited in its light emitting performance due to its small size. It cannot match professional photographic lamps in terms of brightness, power adjustment, color rendering performance, heat dissipation capacity and other aspects. The light source body of the present application can not enter the actual shooting scene, so it does not need to be designed to be small, and can still use high-power, high-color-rendering professional light source components, breaking through the performance bottleneck of traditional micro light sources in brightness, heat dissipation and light quality. It can also be modified using existing photographic lamps, making full use of existing resources and controlling the overall cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments, the following will briefly introduce the drawings of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a perspective view of an embodiment of the light source transfer device for photography based on the light guide fiber of the present application;

[0022] Figure 2 is a perspective view of an embodiment of the light source transfer device for photography based on the light guide fiber of the present application;

[0023] Figure 3is an exploded view of one embodiment of the light source transfer device for photography based on light guide fiber of the present application;

[0024] Figure 4 is a perspective view of the light source body of one embodiment of the light source transfer device for photography based on light guide fiber of the present application;

[0025] Figure 5 is a perspective view of the rear assembly block of one embodiment of the light source transfer device for photography based on light guide fiber of the present application;

[0026] Figure 6 is an application schematic view of one embodiment of the light source transfer device for photography based on light guide fiber of the present application;

[0027] Figure 7 is a structural schematic view of the light guide fiber and the light guide column of one embodiment of the light source transfer device for photography based on light guide fiber of the present application;

[0028] Figure 8 is a structural schematic view of the detachable connection structure of one embodiment of the light source transfer device for photography based on light guide fiber of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1 - light source body; 101 - light exit lens; 102 - heat dissipation hole; 103 - interactive display screen; 104 - docking interface; 2 - light control accessory; 201 - light entry hole; 202 - light exit port; 3 - light guide fiber; 301 - fiber bundle; 302 - sheath; 4 - rear assembly block; 5 - front assembly block; 6 - rear light guide column; 601 - concave curved surface; 602 - refractive index matching glue; 7 - front light guide column; 701 - texture; 8 - support frame; 801 - U-shaped frame; 802 - stand; 803 - handle bolt; 9 - receiving interface ring; 901 - L-shaped slot; 10 - locking ring; 910 - detachable connection structure; 1001 - protrusion; 11 - lug; 12 - axial through cavity DETAILED DESCRIPTION

[0031] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that the specific description is only for teaching the person skilled in the art how to implement the present application, and is not intended to exhaust all possible ways of the present application, nor to limit the scope of the present application.

[0032] Referring to Figure 1 and Figure 3 , the embodiments of the present application provide a light source transfer device for photography based on light guide fiber. Compared with the prior art, Figure 1 , Figure 3is the state of axial separation of each component. The photographic lamp comprises: a light source body 1, a light control accessory 2, and a light guide fiber 3. The light source body 1 and the light control accessory 2 are arranged separately from each other, and the light source body 1 is provided with a light emitting unit. The light guide fiber 3 is a flexible fiber cable, and the specific length of the light guide fiber 3 can be indefinite. The light guide fiber 3 is connected with an assembly block with an optical interface at both ends, and the two assembly blocks are assembled with the light output end of the light source body 1 and the light input end of the light control accessory 2 through a detachable connection structure 910 (see Figure 8 ). The diameter of the light guide fiber 3 is not greater than the minimum outer diameter of the light control accessory 2, and the light guide fiber 3 transmits the light emitted by the light source body 1 to the light control accessory 2 through the principle of total reflection.

[0033] By separating the light source body 1 and the light control accessory 2 and connecting them with the flexible light guide fiber 3, the volume of the photographic lamp is effectively reduced. Since the light control accessory 2 can be placed in the required photographic lighting environment, and the light source body 1 can be dragged behind by means of the long light guide fiber 3, only the volume of the light control accessory 2 needs to be considered. Therefore, the light control accessory 2 can be placed in some narrow environments for lighting. The light guide fiber 3 is relatively thin and is not easily affected by the external environment. The detachable connection structure 910 can realize modular and rapid assembly, and the principle of total reflection can maintain high-efficiency transmission of light energy during flexible transmission.

[0034] Compared with some point light sources such as micro-LED light sources, although the volume of the point light sources is small, the small volume limits the light emitting performance of the point light sources, and the point light sources cannot match professional photographic lamps in terms of brightness, power adjustment, color rendering performance, and heat dissipation capacity. The light source body 1 of the present application is not limited by volume, so it can still use professional high-performance photographic lamps.

[0035] In an embodiment, the light source body 1 can be directly assembled with the light control accessory 2, or the light source body 1 is indirectly assembled with the light control accessory 2 by means of the light guide fiber 3 as shown in Figure 1 , Figure 2 . When the light source body 1 is directly assembled with the light control accessory 2, the assembly form of the light source body 1 and the light control accessory 2 is a direct disassembly structure, and the detachable connection structure 910 of the direct disassembly structure and the assembly block is an interface with the same specification.

[0036] The beneficial effects of the above embodiment are that the direct assembly of the light source body 1 and the light control accessory 2 is the same as the existing photographic lamp, so the present application is compatible with the traditional existing photographic lamp, and only the light guide fiber 3 and the assembly block need to be added for modification, thereby controlling the cost. A new type of split connection double-mode design is formed. The user can freely switch the connection mode according to the scene requirements. The unified interface specification ensures the free switching of the two modes.

[0037] AsFigure 4 , Figure 5 , Figure 8 As shown, in one embodiment, the detachable connection structure 910 is one of a snap-fit ​​connection, a threaded connection, or a magnetic connection. When the detachable connection structure 910 is a snap-fit ​​connection, the detachable connection structure 910 includes a receiving ring 9 and a locking ring 10. The receiving ring 9 is provided with a plurality of L-shaped notches 901 along the circumferential direction, and the locking ring 10 is provided with a plurality of protrusions 1001 along the circumferential direction. The protrusions 1001 and the L-shaped notches 901 are mechanically interlocked by axial docking and circumferential rotation.

[0038] The beneficial effects of adopting the above embodiments are: the snap-fit ​​structure achieves mechanical interlocking through a combination of axial insertion and circumferential rotation, enabling rapid assembly and disassembly within a limited operating space.

[0039] like Figure 1 , Figure 3 , Figure 4 As shown, in one embodiment, the light source body 1 is connected to a support frame 8, and the assembly block directly assembled with the light control accessory 2 is also connected to a support frame 8.

[0040] The advantages of using the above embodiments are: the support frame 8 is convenient for users to grip, or it is convenient to connect components such as tripods below. The light source body 1 is kept relatively stable for a relatively long time with the help of the support frame 8, and the assembly block directly assembled with the light control accessory 2 can be kept stable for a relatively short time with the help of the support frame 8, or the direction of the light control accessory 2 can be adjusted with the help of the support frame 8 adjacent to the light control accessory 2.

[0041] like Figure 4 As shown, in one embodiment, the support frame 8 includes a U-shaped frame 801. The bottom of the U-shaped frame 801 has a downwardly extending column 802. The top two ends of the U-shaped frame 801 are axially connected to the sides of the light source body 1 or the assembly block. The top of the U-shaped frame 801 also has a handle bolt 803, which can lock the rotational freedom of the support frame 8 and the light source body 1 or the assembly block. Figure 1 and Figure 5 As shown, the assembly block has lugs 11 on both sides that can be detached from the support frame 8.

[0042] The beneficial effects of the above embodiments are: the U-shaped frame 801 supports the light source body 1 or assembly block like a fork, the shaft connection mechanism can provide swing freedom, adjust the specific lighting direction of the light control accessory 2, and when the lighting direction meets the requirements, the handle bolt 803 can be locked to ensure the long-term stability of the lighting effect.

[0043] In an embodiment, the assembly block comprises a rear assembly block 4 capable of being directly assembled with the light source body 1, and a front assembly block 5 capable of being directly assembled with the light control accessory 2, the rear assembly block 4 and the front assembly block 5 are respectively complementary to each other in the partial detachable connection structure 910, that is, they are complementary to form a complete detachable connection structure 910.

[0044] The beneficial effect of the above embodiment is that the complementary design of the rear assembly block 4 and the front assembly block 5 can form a mechanical foolproof structure to avoid incorrect connection of the light guide fiber 3. At the same time, when not in use, the rear assembly block 4 and the front assembly block 5 can be assembled with each other to close the two ends of the light guide fiber 3, so as to prevent external impurities from entering and polluting the two ends of the light guide fiber 3.

[0045] As shown in Figure 7 In an embodiment, the light guide fiber 3 comprises a fiber bundle 301 composed of a plurality of fiber filaments, and the fiber bundle 301 is wrapped with a sheath 302, which is a protective sleeve. The sheath 302 restricts the light guide fiber 3 to have a minimum limit bending radius by its elasticity, and the light guide fiber 3 under the minimum limit bending radius satisfies the critical angle condition of total reflection of light.

[0046] The beneficial effect of the above embodiment is that the light guide fiber 3 needs to maintain stable optical performance, and the elastic sheath 302 restricts the overall minimum bending radius of the light guide fiber 3 while protecting the fiber bundle 301, so as to prevent the full reflection condition of the light transmission path from being damaged by excessive bending during use.

[0047] In a non-limiting example, the light guide fiber 3 is in a spiral winding state under natural non-tension condition, and when the light source body 1 and the light control accessory 2 are farther apart, the pitch of the light guide fiber 3 will be enlarged.

[0048] In an embodiment, the light guide fiber 3 is provided with a light guide column at both ends, the assembly block is provided with an axial through cavity 12 capable of accommodating the light guide column, and the diameter of the light guide column gradually decreases in the direction close to the light guide fiber 3. The diameter of the light guide fiber 3 is not greater than the minimum outer diameter of the light control accessory 2, because the diameter of the light guide fiber 3 can be controlled within a small size range. In addition, the diameter of the light guide fiber 3 can also be not greater than the minimum inner diameter of the light control accessory 2, specifically, the diameter of the light guide fiber 3 can be uniform, and the diameter of the light guide fiber 3 is not greater than the diameter of the minimum end face of the light guide column. The minimum inner diameter of the light control accessory 2 is the light inlet hole, and the minimum inner diameter of the light control accessory 2 matches the diameter of the maximum end face of the light guide column.

[0049] The beneficial effects of the above embodiments are as follows: the light guide column is tapered along the axial direction, and its main function is to diffuse or converge the light beam. First, the light emitted by the light source 1 has a certain diameter on its emitting surface, which is generally larger than the diameter of the optical fiber 3. Therefore, it needs to be converged using a light guide column. After the light beam has traveled through the optical fiber 3, it will reach the next light guide column, where it will then diffuse. The structure of the light guide column optimizes the coupling efficiency between the light source and the optical fiber, and the design of the axial through-cavity 12 ensures precise alignment of the optical path.

[0050] In a non-limiting example, the axial through cavity 12 of the assembly block is detachably assembled with the light guide post it assembles, and the light guide post can be quickly removed from the relatively large opening of the axial through cavity 12.

[0051] In one embodiment, the light guide post is shaped like a frustum or a truncated cone.

[0052] The beneficial effects of adopting the above embodiments are: both truncated cones and frustums are typical light guides with one large axial end and the other small axial end, and light guides with different geometric shapes can balance their optical performance and structural strength.

[0053] like Figure 7 As shown, Figure 7 The rear light guide post 6 and the front light guide post 7 are also cross-sectional views. In one embodiment, the light guide post includes a rear light guide post 6 that can dock with the light source body 1, and a front light guide post 7 that can dock with the light control accessory 2. The light source body 1 has a light-emitting lens 101, and one side of the axial end of the rear light guide post 6 has a concave curved surface 601 that can match the light-emitting lens 101. The axial end of the rear light guide post 6 and the light-emitting lens 101 are seamlessly bonded together by a refractive index matching adhesive 602. The hardness of the refractive index matching adhesive 602 is less than the hardness of the light guide post. In addition, the side of the front light guide post 7 facing away from the rear light guide post 6 has a texture 701, and the texture 701 is located within the space surrounded by the light control accessory 2. The side of the front light guide post 7 facing away from the rear light guide post 6 becomes the light-emitting surface within the light control accessory 2.

[0054] The beneficial effects of the above embodiments are as follows: the curvature of the end face of the rear light guide post 6 can be matched with the light-emitting lens 101, and the filler adhesive can also reduce interface light loss. This is because the refractive index matching adhesive 602 is an optical adhesive that adjusts its own refractive index to be similar to that of the bonding material (such as glass, polymer, optical fiber, etc.). Its core function is to reduce Fresnel reflection at the interface, thereby reducing light transmission loss, improving light transmittance, and increasing the efficiency of the optical system. In addition, the textured surface 701 can control the beam diffusion characteristics emitted into the air at the final end, such as achieving uniform divergence of the final light, and realizing end-to-end optical path optimization from the light source to the light control accessory 2.

[0055] In one non-limiting example, the diameters of the rear light guide post 6 and the front light guide post 7 at their facing ends (i.e. the respective smallest diameter ends) can be equal to the diameter of the fiber bundle 301. The diameter of the rear light guide post 6 at the end facing away from the front light guide post 7 can be equal to the diameter of the light exit lens 101.

[0056] As shown in Figure 6 and Figure 1 , the light guide fiber 3 in Figure 6 is in a more elongated state than the fiber rope in Figure 1 .

[0057] In one embodiment, the shape of the light guide post can be a circular truncated cone, i.e. the two ends of the light guide post are still large and small, but the generatrix slope of the light guide post is continuously and gradually changed along the axial direction, the intersection of the side surface of the light guide post and the two end surfaces is perpendicular and orthogonal, and the generatrix of the light guide post can be a quadratic curve. This can be more conducive to total reflection near the intersection between the light guide post and the light guide fiber 3, and near the intersection between the light guide post and the light source body 1. The end surface of the light guide post closely fits the end surface of the light guide fiber 3, ensuring that as many light rays as possible pass through the intersection between the light guide post and the light guide fiber 3 smoothly.

[0058] In one embodiment, the rear light guide post 6 and the front light guide post 7 in the light guide post can be different in color, and by replacing different light guide posts, the final lighting color temperature can be changed. Although in general the light source body 1 can directly adjust by virtue of its own ability, the replacement of different light guide posts also provides a feasible way.

[0059] In one embodiment, the light source body 1 and the light control accessory 2 each have a sensor that can sense the distance between the light source body 1 and the light control accessory 2, and can also sense the included angle of the respective axes of the two. The sensor is in signal connection with the light source body 1, such that when the distance between the light source body 1 and the light control accessory 2 is lengthened, the pitch of the light guide fiber 3 is lengthened, the curvature is reduced, and the light guide performance of the light guide fiber 3 is improved, and at this time the light source body 1 can even appropriately reduce the output brightness, and vice versa. For example, when the included angle of the respective axes of the light source body 1 and the light control accessory 2 is closer to 90°, it means that compared to the case where the respective axes are parallel, the light guide fiber 3 is more bent, so at this time the light source body 1 can appropriately increase the brightness. The light intensity of the light source body 1 is adjusted to offset the fiber loss, so that the final lighting effect reaches a dynamic balance.

[0060] The sensors of the light source body 1 and the light control accessory 2 can use ultra-wideband (UWB) sensors, and the light source body 1 and the light control accessory 2 each install a UWB module to directly measure the straight-line distance between the two points through wireless signals, and determine the relative angle based on the signal phase difference or antenna array.

[0061] As shown in Figure 6As shown in the embodiment, the shell of the light source body 1 is provided with heat dissipation holes 102 on the top and bottom surfaces of the light source body 1, which dissipate the waste heat generated by the light-emitting unit.

[0062] As shown in the embodiment, the light source body 1 further includes an interactive display screen 103 and a plurality of docking interfaces 104 which can be plugged with the ends of various wires. Figure 6

[0063] In combination with Figure 2 and Figure 3 , in an embodiment, the light control accessory 2 has a light inlet hole 201 and a light outlet hole 202 at both ends, the diameter of the light inlet hole 201 is smaller than that of the light outlet hole 202, and the light inlet hole 201 is used to expose the largest axial end surface of the front light guide column 7. The inner wall of the light control accessory 2 is also coated with a reflective layer.

[0064] In an embodiment, the light control accessory 2 for film and television lamps controls light at least including at least one or a combination of reflection, refraction, scattering, absorption, and transmission.

[0065] In an embodiment, the light control accessory 2 includes at least one or a combination of at least one or more of an adapter, a parallel light cover, an imaging lens, a Fresnel lens, a light return lamp cover, a soft light box, a light beam cylinder, and a honeycomb grid.

[0066] The adapter is a mechanical adapter, usually a standard industrial bayonet structure, used to compatible different brands or models of light sources with other light control accessories 2.

[0067] The parallel light cover is usually a long cylindrical structure with a high reflective coating or lens design inside. It provides a very narrow light outlet angle, reflects the light as a nearly parallel light beam, reduces scattering and improves projection distance.

[0068] The imaging lens is composed of multiple sets of precise optical lenses, which controls the direction and shape of light by refraction principle.

[0069] The Fresnel lens has concentric circular lines on its surface, which can reduce the weight of the Fresnel lens itself, and its main principle is refraction.

[0070] The light return lamp cover is a deep cylindrical structure with a high reflective material on the inner wall, suitable for long-distance lighting.

[0071] The soft light box is composed of a metal frame, a reflective lining and a soft light cloth. It uses internal reflection to homogenize light, and the external soft light cloth further diffuses it. Through diffuse reflection, the light is softened and the contrast is reduced.

[0072] The light beam cylinder is a long cylindrical metal cylinder that limits the diffusion range of light by a narrow cylinder body, forming a narrow light beam. ​

[0073] The honeycomb mesh consists of a honeycomb-shaped mesh made of multiple layers of metal blades. The honeycomb mesh only allows light in the vertical direction to pass through, thereby reducing diffuse reflection.

[0074] The above embodiments are only for illustrating the technical concept and features of this application. Their purpose is to enable those skilled in the art to understand the content of this application and implement it. They should not be used to limit the scope of protection of this application. All equivalent changes or modifications made in accordance with the spirit and essence of this application should be covered within the scope of protection of this application.

Claims

1. A photographic light source transfer device based on optical fiber, characterized in that, include: The light source body and light control accessories are arranged separately from each other, and the light source body is provided with a light-emitting unit; The optical fiber is a flexible optical fiber cable. Both ends of the optical fiber are connected to assembly blocks with optical interfaces. The two assembly blocks are respectively assembled to the light output end of the light source body and the light input end of the light control accessory through a detachable connection structure. The diameter of the light-guiding fiber is not greater than the minimum outer diameter of the light-controlling accessory, and the light-guiding fiber transmits the light emitted by the light source body to the light-controlling accessory based on the principle of total internal reflection.

2. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The light source body is directly assembled with the light control accessory or indirectly assembled with the light control accessory via the light guide fiber; When the light source body and the light control accessory are directly assembled, the assembly form of the light source body and the light control accessory is a direct disassembly structure, and the direct disassembly structure and the detachable connection structure have the same interface shape.

3. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The detachable connection structure is one of the following: snap-fit ​​connection, threaded connection, or magnetic connection; The detachable connection structure of the snap-fit ​​type includes a receiving ring and a locking ring. The receiving ring is provided with a plurality of L-shaped notches along the circumference, and the locking ring is provided with a plurality of protrusions along the circumference. The protrusions and the L-shaped notches are mechanically interlocked by axial docking and circumferential rotation.

4. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The main body of the light source is connected to a support frame, and the assembly block, which is directly assembled with the light control accessory, is also connected to a support frame.

5. The photographic light source transfer device based on optical fiber according to claim 4, characterized in that: The support frame includes a U-shaped frame with a downwardly extending column at the bottom. The top two ends of the U-shaped frame are axially connected to the two sides of the light source body or the assembly block. The top of the U-shaped frame also has a handle bolt, which can lock the rotational freedom of the support frame and the light source body or the assembly block.

6. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The assembly block includes a rear assembly block that can be directly assembled with the light source body, and a front assembly block that can be directly assembled with the light control accessory. The detachable connection structures of the rear assembly block and the front assembly block can be partially complementarily assembled.

7. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The optical fiber includes an optical fiber bundle composed of several optical fiber filaments. The optical fiber bundle is wrapped with a sheath. The sheath limits the optical fiber to have a minimum limiting bending radius through its elasticity. The optical fiber under the minimum limiting bending radius satisfies the critical angle condition for total internal reflection of light.

8. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The optical fiber is provided with light guide posts at both ends, and the assembly block has an axial through cavity to accommodate the light guide posts. The diameter of the light guide posts gradually decreases along the direction close to the optical fiber. The light guide post is shaped like a frustum or a truncated cone.

9. The photographic light source transfer device based on optical fiber according to claim 8, characterized in that: The light guide includes a rear light guide that can dock with the light source body, and a front light guide that can dock with the light control accessory; The light source body includes a light-emitting lens, and one side of the rear light guide post has a concave curved surface that can match the light-emitting lens. The one side of the rear light guide post and the light-emitting lens are seamlessly bonded together using refractive index matching adhesive; and / or The front light guide post has a textured surface on the side of its shaft opposite to the rear light guide post.

10. The photographic light source transfer device based on optical fiber according to claim 1, characterized in that: The light control accessory controls light through at least one or more combinations of reflection, refraction, scattering, absorption, and transmission. The light control accessories include at least one or more combinations of adapters, collimators, imaging lenses, Fresnel lenses, reflector lamps, softboxes, snoots, and honeycomb grids.

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