Image acquisition device, visible light light supplementing structure and manufacturing method thereof

Abstract

The application belongs to the technical field of image acquisition devices, and provides an image acquisition device, a visible light supplementing structure and a manufacturing method thereof. The visible light supplementing structure comprises a light-emitting module and a light conversion component. The light-emitting module comprises a light source for emitting outgoing light with a light-emitting peak wavelength between 450 nm and 470 nm and a fluorescent glue sealing layer covering the light source and used for emitting excitation light. The fluorescent glue sealing layer comprises encapsulating glue and fluorescent agent with a mass ratio of 4.95:1-7.15:1. The fluorescent agent comprises yellow fluorescent powder and green fluorescent powder with a mass ratio of 30:1-330:1. The light conversion component is arranged on the light path of the light-emitting module and is configured to add 1.6 g-3.6 g black coloring powder, 2.4 g-4.8 g blue coloring powder, 1.6 g-3.6 g red coloring powder, 1.6 g-3.6 g purple coloring powder and 153 g-209 g light scattering powder in every 25 kg first transparent resin. The visible light supplementing structure provided by the application has small color difference and high yield.

Description

Technical Field

[0001] This application relates to the field of image acquisition device technology, specifically to image acquisition devices, visible light supplementary lighting structures, and their manufacturing methods. Background Technology

[0002] In low-light environments such as at night, image acquisition devices typically employ visible light or infrared supplemental lighting structures. Currently, commercially available visible light supplemental lighting structures generally consist of a white light source and a white transparent element. The emitted light from the white light source passes through the white transparent element and illuminates the surface of the object to be imaged, thus increasing the light intensity on the object's surface. However, during the production and use of visible light supplemental lighting structures, it has been found that there are significant color differences in the white transparent elements between different batches, resulting in poor product consistency. Furthermore, when the image acquisition device uses different colored casings, the color difference between the white light supplemental element and the casing is substantial, leading to poor coordination. Summary of the Invention

[0003] The purpose of this application is to provide an image acquisition device, a visible light supplementary lighting structure and its manufacturing method, so as to solve the technical problems of large color difference and poor consistency of the visible light supplementary lighting structure in the prior art.

[0004] To achieve the above objectives, the technical solution adopted in this application is: to provide a visible light supplementation structure, the visible light supplementation structure comprising:

[0005] A light-emitting module includes a light source and a fluorescent adhesive encapsulation layer covering the light source. The light source is used to emit emitted light with a peak wavelength between 450 and 470 nm. The fluorescent adhesive encapsulation layer is used to emit excitation light when excited by the emitted light. The fluorescent adhesive encapsulation layer includes an encapsulating adhesive and a fluorescent agent with a mass ratio of 4.95:1 to 7.15:1. The fluorescent agent includes yellow phosphor and green phosphor with a mass ratio of 30:1 to 330:1.

[0006] A light conversion element is disposed in the optical path of the light-emitting module to absorb part of the excitation light and form white light emitted from the light conversion element. The light conversion element is configured to contain 1.6g-3.6g of black coloring powder, 2.4g-4.8g of blue coloring powder, 1.6g-3.6g of red coloring powder, 1.6g-3.6g of purple coloring powder, and 153g-209g of diffused light powder in every 25kg of first transparent resin.

[0007] In one embodiment, the yellow phosphor is a yellow rare-earth yttrium aluminum garnet phosphor; and / or, the green phosphor is a green rare-earth yttrium aluminum garnet phosphor; and / or, the first transparent resin is an acrylonitrile-butadiene-styrene copolymer.

[0008] To achieve the above objectives, this application also provides an image acquisition device, which includes an imaging unit and the aforementioned visible light supplementary lighting structure. The visible light supplementary lighting structure is used to supplement the imaging unit with light to improve the illumination intensity on the surface of the object to be imaged.

[0009] In one embodiment, the image acquisition device further includes a housing with a mounting port, the light-emitting module is disposed inside the housing and corresponds to the position of the mounting port, the light conversion element is covered at the mounting port, and the imaging unit is disposed on the side of the housing with the mounting port.

[0010] In one embodiment, the mounting port is arranged around the imaging unit in a semi-closed ring shape, and there are multiple light-emitting modules, which are evenly distributed in a direction parallel to the extension direction of the mounting port.

[0011] In one embodiment, the number of light-emitting modules is 35-45, and the illumination intensity of the visible light supplementary lighting structure is 10-15 lux.

[0012] In one embodiment, the outer shell is configured to contain 17g-18g of black coloring powder, 3.25g-4.25g of blue coloring powder, 2g-3g of purple coloring powder, and 1g-1.4g of red coloring powder in every 25kg of the second transparent resin.

[0013] In one embodiment, the second transparent resin is an acrylonitrile-butadiene-styrene copolymer.

[0014] In one embodiment, the image acquisition device further includes a heat dissipation unit disposed within the housing for cooling the visible light supplementary lighting structure.

[0015] To achieve the above objectives, this embodiment also provides a method for manufacturing a visible light supplementary lighting structure. The method is used to manufacture the aforementioned visible light supplementary lighting structure and includes:

[0016] Prepare the light source, the first transparent resin, the black coloring powder, the blue coloring powder, the red coloring powder, the purple coloring powder, the diffuser powder, the encapsulating adhesive, the green phosphor, and the yellow phosphor;

[0017] The first transparent resin, the black coloring powder, the blue coloring powder, the red coloring powder, the purple coloring powder, and the diffuser powder are mixed in a ratio of 1.6g-3.6g of the black coloring powder, 2.4g-4.8g of the blue coloring powder, 1.6g-3.6g of the red coloring powder, 1.6g-3.6g of the purple coloring powder, and 153g-209g of the diffuser powder to form a first mixture, and the first mixture is injection molded to form the light conversion element.

[0018] The encapsulating adhesive and the phosphor are mixed in a mass ratio of 4.95:1 to 7.15:1, and the yellow phosphor and the green phosphor are mixed in a mass ratio of 30:1 to 330:1 to form a second mixture. The second mixture is then uniformly coated onto the light source to obtain the light-emitting module.

[0019] The light conversion element is placed in the optical path of the light-emitting module to obtain the visible light supplementary light structure.

[0020] The beneficial effects of the visible light supplementation structure provided in this application are as follows: Compared with the prior art, the visible light supplementation structure of this application firstly rationally designs the composition and content of the light conversion element, so that the light conversion element has low visible light reflectivity and suitable visible light transmittance. Then, a suitable light source is selected, and the composition and content of the fluorescent adhesive layer are rationally designed so that the fluorescent adhesive layer generates excitation light with a relative color temperature of 6150K-6750K under the excitation of the emitted light with a peak wavelength between 450 and 470nm. Moreover, the excitation light can finally form white light after passing through the light conversion element, providing white light supplementation effect for the image acquisition device. The visible light supplementation structure using the above structure not only has a good supplementation effect, but also has low light reflectivity of the light conversion element, which is visually confirmed to be black. During production, the color difference between different batches of light conversion elements is small, the product consistency is good, and the yield is high. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the visible light supplementary lighting structure provided in the embodiments of this application;

[0023] Figure 2 for Figure 1The diagram shows a partial structure of the visible light supplementary lighting structure after being cut along the AA direction.

[0024] Figure 3 for Figure 2 A magnified schematic diagram of the visible light supplementary lighting structure at point B;

[0025] Figure 4 This is an exploded structural diagram of the visible light supplementary lighting structure provided in the embodiments of this application;

[0026] The following are the labeling elements in the figure:

[0027] 100 - Visible light supplementary lighting structure; 110 - Light emission module; 111 - Light source; 112 - Phosphor adhesive encapsulation layer; 120 - Light conversion element;

[0028] 200 - Image acquisition device; 210 - Imaging unit; 220 - Housing; 221 - Mounting port. Detailed Implementation

[0029] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0030] In the description of this application, 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, and 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, and therefore should not be construed as a limitation of this application.

[0031] 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.

[0032] Please see Figures 1 to 3The visible light supplementary lighting structure 100 provided in this application embodiment will now be described. The visible light supplementary lighting structure 100 includes a light-emitting module 110 and a light conversion element 120. The light-emitting module 110 includes a light source 111 and a fluorescent adhesive encapsulation layer 112 covering the light source 111. The light source 111 is used to emit emitted light with a peak wavelength between 450nm and 470nm. The fluorescent adhesive encapsulation layer 112 is used to emit excitation light under the excitation of the emitted light. The fluorescent adhesive encapsulation layer 112 includes an encapsulating adhesive and a fluorescent agent. The fluorescent agent includes yellow phosphor and green phosphor. The mass ratio of the encapsulating adhesive to the fluorescent agent is 4.95:1-7.15:1, and the mass ratio of the yellow phosphor to the green phosphor is 30:1-330:1. The light conversion element 120 is disposed in the optical path of the light-emitting module 110, and is used to absorb part of the excitation light and form white light emitted from the light conversion element 120. The light conversion element 120 is configured to add 1.6g-3.6g of black coloring powder, 2.4g-4.8g of blue coloring powder, 1.6g-3.6g of red coloring powder, 1.6g-3.6g of purple coloring powder and 153g-209g of diffused light powder to every 25kg of the first transparent resin.

[0033] Specifically, the light source 111 can be set as a dual-chip blue LED, which is beneficial for heat dissipation of the visible light supplement structure 100.

[0034] Specifically, the mass ratio of encapsulating adhesive to fluorescent agent can be 7.15:1, 7:1, 6.9:1, 6.8:1, 6.7:1, 6.6:1, 6.5:1, 6.4:1, 6.3:1, 6.2:1, 6:1, 5.9:1, 5.8:1, 5.7:1, 5.6:1, 5.5:1, 5.4:1, 5.3:1, 5.2:1, 5.1:1, 5:1, 4.95:1, etc., and can be set as needed. The mass ratio of yellow phosphor to green phosphor can be 30:1, 75:2, 300:7, 50:1, 60:1, 75:1, 100:1, 150:1, 300:1, or 330:1, etc., and can be set as needed. Both yellow and green phosphors can be purchased directly from the market. Preferably, the encapsulating adhesive can be AB silicone, which is obtained by combining type A silicone and type B silicone made from monomers such as vinyl and additives such as silica. This type of silicone has excellent mechanical strength and light transmittance, which can fix the phosphor well on the light source 111 without affecting the performance of the phosphor.

[0035] It should be noted that the excitation light emitted by the fluorescent adhesive sealing layer 112 with the above structure under the excitation of the emitted light has coordinates (X1, Y1) on the CIE chromaticity diagram, where the value of X1 ranges from 0.3088 to 0.322 and the value of Y1 ranges from 0.3299 to 0.3495.

[0036] Specifically, the light conversion element 120 can be configured with 1.6g of black coloring powder, 2.4g of blue coloring powder, 1.6g of red coloring powder, 1.6g of purple coloring powder, and 153g of diffuser powder per 25kg of first transparent resin; or, with 2g of black coloring powder, 3g of blue coloring powder, 2g of red coloring powder, 2g of purple coloring powder, and 163g of diffuser powder per 25kg of first transparent resin; or, with 2.5g of black coloring powder, 3.5g of blue coloring powder, 2.5g of red coloring powder, 2.5g of purple coloring powder, and 180g of diffuser powder per 25kg of first transparent resin; or, with 2.3g of black coloring powder, 3.3g of blue coloring powder, 2g of red coloring powder, 2g of purple coloring powder, and 153g of diffuser powder per 25kg of first transparent resin. The following formulations can be prepared: 1. 2.3g blue coloring powder, 2.3g red coloring powder, 2.3g purple coloring powder, and 175g diffuser powder per 25kg of first transparent resin; 2. 3g black coloring powder, 3.8g blue coloring powder, 2.8g red coloring powder, 2.8g purple coloring powder, and 185g diffuser powder per 25kg of first transparent resin; 3. 3g black coloring powder, 4g blue coloring powder, 3g red coloring powder, 3g purple coloring powder, and 195g diffuser powder per 25kg of first transparent resin; 3. 3. 6g black coloring powder, 4.8g blue coloring powder, 3.6g red coloring powder, 3.6g purple coloring powder, and 209g diffuser powder per 25kg of first transparent resin. All the aforementioned black, blue, red, and purple coloring powders are commercially available.

[0037] It should be noted that the white light obtained using the aforementioned light-emitting module 110 and light conversion element 120 has coordinates (X2, Y2) on the CIE chromaticity diagram, where X2 ranges from 0.28 to 0.30, Y2 ranges from 0.29 to 0.31, and the relative color temperature of the white light is 8000K-9000K. Preferably, the coordinates of the white light on the CIE chromaticity diagram are (0.2889, 0.2968), and the relative color temperature of the white light is 8773K.

[0038] The visible light supplementary lighting structure 100 provided in this embodiment, compared with the prior art, firstly, rationally designs the composition and content of the light conversion element 120, so that the light conversion element 120 has low visible light reflectivity and suitable light transmittance. Then, a suitable light source 111 is selected, and the composition and content of the fluorescent adhesive encapsulation layer 112 are rationally designed so that the fluorescent adhesive encapsulation layer 112 generates excitation light with a relative color temperature of 6150K-6750K under the excitation of the emitted light with a peak wavelength between 450 and 470 nm emitted by the light source 111. Moreover, the excitation light, after passing through the light conversion element 120, can finally form white light. Thus, from the user's perspective, when the light source 111 emits emitted light, the visible light supplementary lighting structure 100 provides white light supplementary lighting for the image acquisition device 200. When the light source 111 does not emit emitted light, the visible light supplementary lighting structure 100 appears black to the human eye. Since the human eye is most sensitive to color differences in white but not in black, color difference is a core technical indicator for quality management. In this embodiment, the color difference of black light conversion components 120 produced in different batches is small, the product consistency is good, the yield is high, and it can provide white supplementary light effect when powered on, thus meeting the usage requirements.

[0039] In another embodiment of this application, the yellow phosphor is a yellow rare earth yttrium aluminum garnet phosphor.

[0040] Furthermore, the green phosphor is a green rare-earth yttrium aluminum garnet phosphor.

[0041] Fluorescent agents using yttrium aluminum garnet (YAG) series phosphors are water-resistant, acid and alkali-resistant, chemically stable, safe, non-toxic, and have high safety performance. They also exhibit better luminescence intensity and stability, making them highly suitable for use in the fluorescent adhesive sealing layer 112 of this invention. All of the aforementioned phosphors are commercially available.

[0042] In another embodiment of this application, the first transparent resin is acrylonitrile-butadiene-styrene copolymer (ABS). ABS is resistant to chemical corrosion and heat, has a certain surface hardness, and has the processing and molding characteristics of thermoplastic plastics. Using ABS to make the light conversion component 120 is beneficial to the processing of the light conversion component 120 and to improving the structural stability and service life of the light-emitting module 110.

[0043] Please see Figure 3 and Figure 4 This embodiment also provides an image acquisition device 200, which includes an imaging unit 210 and the aforementioned visible light supplementary lighting structure 100. The visible light supplementary lighting structure 100 is used to supplement the imaging unit 210 with light to improve the illumination intensity on the surface of the object being photographed.

[0044] It should be noted that the imaging unit 210 may include a camera, a touch screen, etc., and can be configured as needed, without being limited to a single device.

[0045] Since the image acquisition unit provided in this embodiment includes all embodiments of the above-described visible light supplementary lighting structure 100, it has at least all the beneficial effects of the above-described visible light supplementary lighting structure 100, which will not be described in detail here.

[0046] In another embodiment of this application, please refer to Figure 4 The image acquisition device 200 also includes a housing 220 with a mounting port 221, a light-emitting module 110 disposed inside the housing 220 and corresponding to the position of the mounting port 221, a light conversion component 120 covering the mounting port 221, and an imaging unit 210 disposed on the side of the housing 220 with the mounting port 221.

[0047] This embodiment provides an image acquisition device 200. When in use, the light source 111 emits emitted light with a peak wavelength between 450nm and 470nm. The emitted light excites the fluorescent adhesive sealing layer 112 to generate excitation light with a correlated color temperature between 6150K and 6750K. The portion of the excitation light that passes through the light conversion element 120 forms white light, which can increase the illumination intensity on the surface of the object to be imaged.

[0048] In another embodiment of this application, please refer to Figure 4 The mounting port 221 surrounds the imaging unit 210 and is arranged in a semi-closed ring. There are multiple light-emitting modules 110, which are evenly distributed in a direction parallel to the extension direction of the mounting port 221.

[0049] It should be noted that the number of light-emitting modules 110 can be one, ten, forty, etc., and can be set according to the required light intensity and other parameters.

[0050] The image acquisition device 200 provided in this embodiment has multiple light-emitting modules 110 that are semi-enclosed and uniformly surround the imaging unit 210 along the extension direction of the mounting port 221, which can provide uniform supplementary light to the imaging unit 210.

[0051] In another embodiment of this application, the number of light-emitting modules 110 is 35-45, and the illumination intensity of the visible light supplementary lighting structure 100 is 10-15 lux. The image acquisition device 200 using the above structure can provide an appropriate illumination intensity for the imaging unit 210.

[0052] In another embodiment of this application, the outer casing 220 is configured to contain 17g-18g of black coloring powder, 3.25g-4.25g of blue coloring powder, 2g-3g of purple coloring powder, and 1g-1.4g of red coloring powder in every 25kg of the second transparent resin.

[0053] Specifically, the outer shell 220 can be prepared by adding 17.5g of black coloring powder, 3.75g of blue coloring powder, 2.5g of purple coloring powder and 1.25g of red coloring powder to every 25kg of second transparent resin; or, by adding 17.3g of black coloring powder, 3.5g of blue coloring powder, 2.3g of purple coloring powder and 1.1g of red coloring powder to every 25kg of second transparent resin; or, by adding 17.8g of black coloring powder, 4g of blue coloring powder, 2.8g of purple coloring powder and 1.3g of red coloring powder to every 25kg of second transparent resin.

[0054] The housing 220 provided in this embodiment has a light reflectivity of less than 3%, and is visually confirmed to be black. It is similar in color to the light conversion element 120, and the two are well coordinated, which can increase the overall aesthetics of the image acquisition device 200.

[0055] Specifically, the color difference between the outer casing 220 and the light conversion element 120 is measured using a gray card comparison or a colorimeter. The color difference between the two is small, and color difference is a core technical indicator for quality management, which is beneficial to improving the quality management technical indicators of the image acquisition device 200.

[0056] The colorimeter can be either the Datacolor from Datara or the ColorEye from X-Rite. Based on the CIELAB color space, the average color difference ΔE is used as the evaluation standard. The color difference between the housing 220 and the light conversion element 120 is calculated as follows: ΔL, Δa, and Δb represent the differences in L, a, and b between the housing 220 and the light conversion element 120, respectively, and ΔE represents the total color difference, i.e., the average color difference. Based on the CIELAB color difference formula: The relative color difference between the housing 220 and the light conversion element 120 was measured to be less than 8%.

[0057] It should be noted that the CIELAB color space uses a digital method to describe human visual perception. Among them, the L component is used to represent the brightness of a pixel, with a value range of [0, 100], representing pure black to pure white; a represents the range from red to green, with a value range of [127, -128]; b represents the range from yellow to blue, with a value range of [127, -128].

[0058] In another embodiment of this application, the second transparent resin is an acrylonitrile-butadiene-styrene copolymer. ABS is chemically resistant, heat-resistant, has a certain surface hardness, and possesses the processing and molding characteristics of thermoplastics. Using ABS as the base material of the outer shell 220 is beneficial for the processing of the outer shell 220 and improves the structural stability and service life of the outer shell 220.

[0059] In another embodiment of this application, the image acquisition device 200 further includes a heat dissipation unit (not shown in the figure), which is disposed inside the housing 220 and is used to cool the visible light supplementary lighting structure 100.

[0060] Specifically, the heat dissipation unit can be a heat sink, a cooling fan, etc., and can be configured as needed, without being limited to a single one.

[0061] The image acquisition device 200 provided in this embodiment has a heat dissipation unit that can reduce the temperature inside the housing 220, extend the service life of various components of the image acquisition unit, and prevent the low transmittance of the optical conversion element from causing the internal temperature of the housing 220 to be too high and damaging the components.

[0062] Please see Figure 1 and Figure 2 This embodiment also provides a method for manufacturing a visible light supplementary lighting structure 100. The method is used to manufacture the above-mentioned visible light supplementary lighting structure 100, and includes:

[0063] Prepare light source 111, first transparent resin, black coloring powder, blue coloring powder, red coloring powder, purple coloring powder, diffuser powder, encapsulating glue, green phosphor and yellow phosphor;

[0064] According to the ratio of 1.6g-3.6g black coloring powder, 2.4g-4.8g blue coloring powder, 1.6g-3.6g red coloring powder, 1.6g-3.6g purple coloring powder and 153g-209g diffuser powder added to every 25kg of first transparent resin, the first transparent resin, black coloring powder, blue coloring powder, red coloring powder, blue coloring powder and diffuser powder are mixed to form a first mixture, and the first mixture is injection molded into a light conversion part 120;

[0065] According to the mass ratio of encapsulating adhesive to phosphor of 4.95:1-7.15:1 and the mass ratio of yellow phosphor to green phosphor of 30:1-330:1, the encapsulating adhesive, yellow phosphor and green phosphor are mixed to form a second mixture, and the second mixture is uniformly coated on the light source 111 to obtain the light-emitting module 110.

[0066] The light conversion element 120 is placed in the optical path of the light-emitting module 110 to obtain the visible light supplementary light structure 100.

[0067] The manufacturing method provided in this embodiment is simple and easy to implement, and can be mass-produced. The resulting visible light supplementary structure 100 can provide white light supplementary lighting for the image acquisition device 200. Moreover, the light conversion element 120 has low light reflectivity and is visually confirmed to be black. During production, the color difference between different batches of the light conversion element 120 is small, the product consistency is good, and the yield is high.

[0068] The above description is merely a preferred embodiment of this application and is 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. A visible light supplementing structure, characterized in that, The visible light supplementing structure comprises: The light-emitting module comprises a light source and a fluorescent glue sealing layer covering the light source, the light source is used for emitting outgoing light with a light-emitting peak wavelength between 450 nm and 470 nm, and the fluorescent glue sealing layer is used for emitting excitation light under excitation of the outgoing light, the fluorescent glue sealing layer comprises encapsulating glue and fluorescent agent with a mass ratio of 4.95:1-7.15:1, the fluorescent agent comprises yellow fluorescent powder and green fluorescent powder with a mass ratio of 30:1-330:1, the yellow fluorescent powder is yellow rare earth yttrium aluminum garnet fluorescent powder, the green fluorescent powder is green rare earth yttrium aluminum garnet fluorescent powder, and the components and contents of the fluorescent glue sealing layer are controlled so that the fluorescent glue sealing layer generates excitation light with a relative color temperature of 6150 K-6750 K under excitation of the outgoing light with a light-emitting peak wavelength between 450 nm and 470 nm emitted by the light source; The light conversion piece is arranged on the light path of the light-emitting module and is used for absorbing part of the excitation light and forming white light emitted from the light conversion piece, and the light conversion piece is configured to add 1.6 g-3.6 g of black coloring powder, 2.4 g-4.8 g of blue coloring powder, 1.6 g-3.6 g of red coloring powder, 1.6 g-3.6 g of purple coloring powder and 153 g-209 g of light scattering powder in every 25 kg of the first transparent resin.

2. The visible light supplementing structure according to claim 1, characterized in that: The first transparent resin is acrylonitrile-butadiene-styrene copolymer.

3. An image acquisition device, characterized by: The image acquisition device comprises an imaging unit and the visible light supplementing structure according to any one of claims 1-2, and the visible light supplementing structure is used for supplementing light for the imaging unit to improve the illumination intensity of the surface of the object to be imaged.

4. The image acquisition device of claim 3, wherein: The image acquisition device further comprises a housing provided with a mounting port, the light-emitting module is arranged in the housing and corresponds to the mounting port, the light conversion piece covers the mounting port, and the imaging unit is arranged on one side of the housing provided with the mounting port.

5. The image acquisition device of claim 4, wherein: The mounting port surrounds the imaging unit and is in a semi-closed ring shape, the number of the light-emitting modules is multiple, and the multiple light-emitting modules are uniformly distributed in a direction parallel to the extension direction of the mounting port.

6. The image acquisition device of claim 5, wherein: The number of the light-emitting modules is 35-45, and the illumination intensity of the visible light supplementing structure is 10-15 lux.

7. The image acquisition device of claim 4, wherein: The housing is configured to add 17 g-18 g of black coloring powder, 3.25 g-4.25 g of blue coloring powder, 2 g-3 g of purple coloring powder and 1 g-1.4 g of red coloring powder in every 25 kg of the second transparent resin.

8. The image acquisition device of claim 7, wherein: The second transparent resin is acrylonitrile-butadiene-styrene copolymer.

9. The image acquisition device of claim 4, wherein: The image acquisition device further comprises a heat dissipation unit arranged in the housing and used for cooling the visible light supplementing structure.

10. A method for manufacturing a visible light supplementing structure, characterized by: The method is used for manufacturing the visible light supplementing structure according to any one of claims 1-2, and the method comprises: Preparation of the light source, the first transparent resin, the black colorant powder, the blue colorant powder, the red colorant powder, the purple colorant powder, the light scattering powder, the encapsulating glue, the green fluorescent powder and the yellow fluorescent powder; According to the proportion of 1.6g-3.6g of the black colorant powder, 2.4g-4.8g of the blue colorant powder, 1.6g-3.6g of the red colorant powder, 1.6g-3.6g of the purple colorant powder and 153g-209g of the light scattering powder per 25kg of the first transparent resin, the first transparent resin, the black colorant powder, the blue colorant powder, the red colorant powder, the blue colorant powder and the light scattering powder are mixed to form a first mixture, and the first mixture is injection molded to form the light conversion component; According to the proportion of the mass ratio of the encapsulating glue and the fluorescent agent being 4.95:1-7.15:1, and the mass ratio of the yellow fluorescent powder and the green fluorescent powder being 30:1-330:1, the encapsulating glue, the yellow fluorescent powder and the green fluorescent powder are mixed to form a second mixture, and the second mixture is uniformly coated on the light source to obtain the light emitting module; wherein the yellow fluorescent powder is a yellow rare earth yttrium aluminum garnet fluorescent powder; the green fluorescent powder is a green rare earth yttrium aluminum garnet fluorescent powder; by controlling the components and contents of the fluorescent glue sealing layer, the fluorescent glue sealing layer generates excitation light with a relative color temperature of 6150K-6750K under the excitation of the emitted light with a peak wavelength of 450-470nm emitted by the light source; The light conversion component is arranged on the light path of the light emitting module to obtain the visible light supplementing structure.

Images