Shadowless lamp

Abstract

The utility model relates to the field of lamps, in particular to a shadowless lamp which comprises a lamp holder, a laser light source, light transmission assemblies and light condensation structures, one end face of the lamp holder is a light emitting face, a plurality of light condensation structures are arranged on the light emitting face, and the light transmission assemblies and the light condensation structures are arranged in a one-to-one correspondence mode. The light transmission assembly comprises a fluorescent powder carrier and an optical fiber, one end of the optical fiber corresponds to a light outlet of the laser light source, and the other end of the optical fiber extends to the lamp holder and corresponds to the light condensation structure. And the fluorescent powder carrier is arranged on the lamp holder and is arranged between the optical fiber and the light condensing structure. The shadowless lamp is small in size, small in heat productivity and good in shadowless effect.

Description

Technical Field

[0001] This utility model relates to the field of lamps, and in particular to a shadowless lamp. Background Technology

[0002] In the field of emergency medical care, shadowless lamps are indispensable equipment during surgery and emergency procedures. However, traditional shadowless lamps use xenon lamps, which are relatively large in size. Furthermore, as they are thermal light sources, they generate high temperatures, requiring large heat sinks, further increasing the lamp's overall size. Halogen or incandescent lamps are also used, but these sources not only consume a lot of energy and generate a lot of heat, but also have relatively short lifespans.

[0003] To reduce the size of lamps, a type of shadowless lamp using LEDs as the light source has emerged on the market. LEDs are Lambertian light emitters, and they distribute light through reflection. However, their central beam angle is too large, which does not meet the requirements of shadowless lamps. Moreover, LED light sources present heat dissipation challenges in small-volume lamps. Using a large heat sink would make the lamp too thick and heavy. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a shadowless lamp that is small in size, generates little heat, and has a good shadowless effect.

[0005] To solve the above-mentioned technical problems, this utility model provides a shadowless lamp, including a lamp head, a laser light source, a light transmission component and a light focusing structure. One end face of the lamp head is a light emitting surface, and a plurality of light focusing structures are provided on the light emitting surface. The light transmission component and the light focusing structure are arranged in a one-to-one correspondence.

[0006] The light transmission component includes a phosphor carrier and an optical fiber. One end of the optical fiber is positioned corresponding to the light outlet of the laser source, and the other end extends to the lamp head and is positioned corresponding to the focusing structure. The phosphor carrier is positioned on the lamp head and between the optical fiber and the focusing structure.

[0007] As an improvement to the above solution, the light-emitting surface is an arc-shaped surface that is concave into the lamp head.

[0008] As an improvement to the above scheme, the radius of the sphere containing the light-emitting surface is 100-200mm.

[0009] As an improvement to the above solution, the phosphor carrier includes a fluorescent carrier and phosphor, wherein the fluorescent carrier is made of a transparent material and the phosphor is coated on the fluorescent carrier.

[0010] As an improvement to the above solution, the light-concentrating structure includes a reflector and a deflecting component. The reflector is disposed on the light-emitting surface, and the light-transmitting component is positioned above the reflector via the deflecting component.

[0011] As an improvement to the above solution, the lamp head is provided with a first light transmission channel that runs through both ends of the lamp head;

[0012] The steering assembly includes a steering conduit and a steering element. The steering conduit is disposed within the first light transmission channel and extends out of the first light transmission channel to be positioned above the light-emitting surface. The optical fiber passes through the steering conduit. The steering element and the phosphor carrier are disposed within the steering conduit and positioned above the reflector. The other end of the optical fiber faces the steering element so that the light emitted from the optical fiber is reflected toward the phosphor carrier.

[0013] As an improvement to the above solution, the steering component is provided with a steering arc surface, and the other end of the optical fiber faces the steering arc surface.

[0014] As an improvement to the above scheme, the radius of curvature of the center curve of the reflector cup is 2-10mm, and the curvature is 0.1-0.5; the radius of curvature of the curves at both ends of the reflector cup is 20-30mm, and the curvature is 0.033-0.05.

[0015] As an improvement to the above solution, the lamp head is provided with a second light transmission channel that runs through both ends of the lamp head;

[0016] The light-gathering structure is a lens, with an exit surface at one end and an entrance port at the other end; the exit surface and the exit surface are arranged correspondingly, and the lens, phosphor carrier, and optical fiber are arranged sequentially in the second light transmission channel; the other end of the optical fiber is arranged correspondingly to the entrance port, and the phosphor carrier is arranged in the entrance port.

[0017] As an improvement to the above solution, the lens is a TIR lens.

[0018] Implementing this utility model has the following beneficial effects:

[0019] This novel shadowless lamp employs a laser light source and a light transmission component. The light transmission component includes an optical fiber and a phosphor carrier. The optical fiber transmits the laser light emitted from the laser source to the lamp head, where it is focused by a focusing structure before being emitted. Since laser light is typically a single color, such as blue laser light, it requires the excitation of specific yellow phosphors to produce white light, meeting the requirements for medical use.

[0020] This invention eliminates the need for a light source in the lamp head, reducing its size and consequently the overall size of the shadowless lamp. Furthermore, the use of fiber optic laser transmission results in minimal heat generation, eliminating the need for heat sinks and other structural elements, further reducing the lamp's size. Compared to traditional xenon lamps, shadowless lamps eliminate the need for bulb replacements, lowering maintenance costs and extending their lifespan.

[0021] Finally, the light-emitting surface of the lamp head is equipped with several focusing structures. The light transmission components and focusing structures are set one-to-one. The light transmission components and focusing structures work together to form multiple collimated beams that illuminate the same point, effectively eliminating shadows during surgery and emergency treatment, resulting in a good shadowless effect. Attached Figure Description

[0022] Figure 1 This is a front view of the lamp holder of this utility model;

[0023] Figure 2 yes Figure 1 Top view;

[0024] Figure 3 This is the first embodiment of the shadowless lamp of this utility model. Figure 1 Sectional view along line AA;

[0025] Figure 4 yes Figure 3 Enlarged view of point B;

[0026] Figure 5 This is the second embodiment of the shadowless lamp of this utility model. Figure 1 Sectional view along line AA;

[0027] Figure 6 yes Figure 5 Enlarged view of point C. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, a further detailed description of this utility model will be provided below in conjunction with the accompanying drawings. It is hereby declared that any use of terms such as "up," "down," "left," "right," "front," "back," "inner," and "outer" in this document is based solely on the accompanying drawings and is not intended to specifically limit the scope of this utility model.

[0029] See Figure 1-6 This utility model discloses a shadowless lamp, including a lamp head 1, a laser light source (not shown in the figure), a light transmission component, and a focusing structure 2. One end face of the lamp head 1 is a light-emitting surface 11, and a plurality of focusing structures 2 are provided on the light-emitting surface 11. The light transmission component and the focusing structure 2 are arranged in a one-to-one correspondence. The laser light source is preferably a laser.

[0030] The light transmission component includes a phosphor carrier 3 and an optical fiber 4. One end of the optical fiber 4 is positioned corresponding to the light outlet of the laser source, and the other end extends to the lamp head 1 and is positioned corresponding to the focusing structure 2. The phosphor carrier 3 is disposed on the lamp head 1 and is placed between the optical fiber 4 and the focusing structure 2.

[0031] This novel shadowless lamp employs a laser light source and a light transmission component. The light transmission component includes an optical fiber and a phosphor carrier. The optical fiber transmits the laser light emitted from the laser source to the lamp head, where it is focused by a focusing structure before being emitted. Since laser light is typically a single color, such as blue laser light, it requires the excitation of specific yellow phosphors to produce white light, meeting the requirements for medical use.

[0032] This invention eliminates the need for a light source in the lamp head, reducing its size and consequently the overall size of the shadowless lamp. Furthermore, the use of fiber optic laser transmission results in minimal heat generation, eliminating the need for heat sinks and other structural elements, further reducing the lamp's size. Compared to traditional xenon lamps, shadowless lamps eliminate the need for bulb replacements, lowering maintenance costs and extending their lifespan.

[0033] Finally, the light-emitting surface of the lamp head is equipped with several focusing structures. The light transmission components and focusing structures are set one-to-one. The light transmission components and focusing structures work together to form multiple collimated beams that illuminate the same point, effectively eliminating shadows during surgery and emergency treatment, resulting in a good shadowless effect.

[0034] Preferably, such as Figure 2 As shown, the light-emitting surface 11 is an arc-shaped surface concave inwards towards the lamp head, which is beneficial for focusing light. More preferably, the radius of the sphere containing the light-emitting surface 11 is 100-200 mm. Specifically, the radius of the sphere containing the light-emitting surface 11 can be 100, 110, 120, 130, 140, 150, 160, 170, 180, 190, or 200 mm. This design of the light-emitting surface causes the light to be slightly deflected inwards, allowing multiple light spots to overlap, achieving a shadowless effect and enhancing the illuminance of the illuminated surface.

[0035] Specifically, the phosphor carrier 3 includes a fluorescent support and phosphor. The fluorescent support is made of a transparent material, and the phosphor is coated on the fluorescent support. The laser source emits a blue laser, and the phosphor is a yellow phosphor. The blue laser excites the yellow phosphor to produce white light, which is then focused and reflected by the focusing structure to form collimated light. The transparent material is preferably acrylic, but is not limited to this.

[0036] Furthermore, this utility model also includes a lamp body (not shown in the figure) and a power supply (not shown in the figure), with the laser light source and the power supply electrically connected. The lamp body can be made of a lightweight material such as aluminum, which has good heat dissipation performance and high reliability. The lamp head and the lamp body can be movably connected through an adjustment mechanism, which is used to adjust the light illumination range and direction of the lamp head to adapt to different surgical and emergency needs. This adjustment mechanism can adopt existing technology structures, which will not be described in detail here. The laser light source and the power supply can be located inside the lamp body or outside the lamp body.

[0037] It should be noted that this utility model includes two embodiments, the difference between which lies in the focusing structure and the lamp head structure.

[0038] First embodiment: as follows Figure 1-4 As shown, the focusing structure 2 includes a reflector 21 and a steering assembly. The reflector 21 is disposed on the light-emitting surface 11, and the light-transmitting assembly is positioned above the reflector 21 via the steering assembly. Guided by the fiber optic steering assembly, the laser light is transmitted to the light-emitting surface, i.e., above the reflector, and then into the reflector. After being reflected by the reflector, the light is emitted, forming collimated light. Multiple collimated beams illuminate the same point, effectively eliminating shadows during surgery and emergency procedures, resulting in a good shadowless effect.

[0039] Specifically, the lamp head 1 has a first light transmission channel 12 that runs through both ends of the lamp head 1; the steering assembly includes a steering guide 5 and a steering element 6. The steering guide 5 is located within the first light transmission channel 12 and extends out of the first light transmission channel 12 to be positioned above the light-emitting surface 11; the optical fiber 4 passes through the steering guide 5; the steering element 6 and the phosphor carrier 3 are located within the steering guide 5 and positioned above the reflector cup 21; the other end of the optical fiber 4 faces the steering element 6 so that the light emitted from the optical fiber 4 is reflected towards the phosphor carrier 3. Preferably, the phosphor carrier 3 is located directly above the center of the reflector cup 21. It should be noted that the bottom surface of the steering guide 5 has an opening, and the phosphor carrier 3 is located in this opening to ensure that the light passing through the phosphor carrier can reach the reflector cup.

[0040] Guided by a diverting conduit, the optical fiber enters the lamp head from the other end and exits from the light-emitting surface. The end of the diverting conduit is positioned above the light-emitting surface, i.e., the reflector. One end of the optical fiber is positioned corresponding to the light-emitting port of the laser source, and the other end passes through the lamp head and is positioned above the reflector. The diverting element and the phosphor carrier are both located at the end of the diverting conduit and positioned above the reflector. The other end of the optical fiber faces the diverting element, directing the laser beam towards it. The diverting element then redirects the light beam to the phosphor carrier, exciting the phosphor to form white light, which then passes through the phosphor carrier and strikes the reflector, where it is reflected and emitted.

[0041] Preferably, such as Figure 4 As shown, the steering component 6 has a steering arc surface 61, and the other end of the optical fiber 4 faces the steering arc surface 61. The arrows in the figure indicate the direction of the light rays. It can be seen in the figure that the light in the optical fiber is deflected at a certain angle by the steering component and then strikes the phosphor carrier. The yellow phosphor is excited, causing the blue light emitted by the laser to be emitted as white light, transforming it into 4000-5000K light suitable for surgery, thus achieving the purpose of practical application. The surface of the steering arc surface 61 is coated with a highly reflective material, such as a metallic material.

[0042] The reflector cup is made of a high-reflectivity material, which can be a material with a metal coating. The reflector cup has an internal reflective surface with a specific curvature designed to receive and distribute the light emitted after being excited by the yellow phosphor.

[0043] Preferably, the radius of curvature of the center curve of the reflector cup 21 is 2-10 mm, and the curvature is 0.1-0.5; the radius of curvature of the curves at both ends of the reflector cup 21 is 20-30 mm, and the curvature is 0.033-0.05.

[0044] More preferably, the radius of curvature of the center curve of the reflector cup 21 is 3-8mm, and the curvature is 0.125-0.33; the radius of curvature of the curves at both ends of the reflector cup 21 is 22-28mm, and the curvature is 0.0357-0.0454.

[0045] More preferably, the radius of curvature of the center curve of the reflector cup 21 is 4-6 mm, and the curvature is 0.166-0.25; the radius of curvature of the curves at both ends of the reflector cup 21 is 24-26 mm, and the curvature is 0.0384-0.0416.

[0046] More preferably, the radius of curvature of the center curve of the reflector cup 21 is 5.83 mm, and the curvature is 0.17; the radius of curvature of the curves at both ends of the reflector cup 21 is 25.65 mm, and the curvature is 0.0389. The curvature decreases uniformly in between, forming this optical surface.

[0047] The first embodiment of this utility model employs a specially designed reflector cup, causing the light to be emitted in a nearly straight direction. This results in a light intensity of 50% at an angle of 9 degrees, corresponding to a spot diameter of 157mm at 1m. A light intensity of 10% at an angle of 16 degrees corresponds to a spot diameter of 281mm at 1m. Based on this data, we can determine that the main light beam accounts for more than 50% of the full angle. This aligns with the standard requirement that d50 is at least 50% of the spot diameter d10. Therefore, we can conclude that this light distribution meets the relevant standards for shadowless lamps.

[0048] Preferably, such as Figure 1 As shown, the reflector cups 21 are evenly arranged on the light-emitting surface of the lamp head 1.

[0049] Second embodiment: as follows Figure 1-2As shown in Figures 5-6, the lamp head 1 has a second light transmission channel 13 that runs through both ends of the lamp head 1; the focusing structure 2 is a lens 22, one end of the lens 22 has an exit surface 221, and the other end has an entrance port 222; the exit surface 221 and the exit surface 11 are correspondingly arranged; the lens 22, the phosphor carrier 3, and the optical fiber 4 are sequentially arranged in the second light transmission channel 13; the other end of the optical fiber 4 is correspondingly arranged in the entrance port 222, and the phosphor carrier 3 is arranged in the entrance port 222. The lens 22, the phosphor carrier 3, and the optical fiber 4 can be fixed in the second light transmission channel 13 by means of adhesive or other fixing methods.

[0050] Preferably, the lens 22 is a TIR lens. A TIR lens has a specific optical structure; white light is focused by the TIR lens to form collimated light, and multiple collimated beams illuminate the same point, effectively eliminating shadows during surgery and emergency procedures, resulting in a good shadowless effect. The TIR lens can utilize existing technology and will not be described in detail here.

[0051] The light from the optical fiber is directed towards the phosphor carrier, exciting the yellow phosphor and causing the blue light emitted by the laser to be emitted as white light. This white light is then focused by a TIR lens before being emitted. After passing through the TIR lens, the angle at 50% intensity is 10 degrees, corresponding to a spot diameter of 175mm at 1m. The angle at 10% intensity is 16 degrees, corresponding to a spot diameter of 281mm at 1m. Based on this data, we can determine that the main light beam accounts for more than 50% of the full angle. This conforms to the standard requirement that d50 is at least 50% of the spot diameter d10. Therefore, we can conclude that this light distribution meets the relevant standards for shadowless lamps.

[0052] Preferably, such as Figure 1 As shown, the lenses 22 are evenly arranged on the light-emitting surface 11 of the lamp head 1.

[0053] In summary, this utility model provides a shadowless lamp that is small in size, generates little heat, and has a good shadowless effect.

[0054] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A shadowless lamp, characterized in that, It includes a lamp head, a laser light source, a light transmission component, and a light focusing structure. One end face of the lamp head is a light-emitting surface, and a plurality of light focusing structures are provided on the light-emitting surface. The light transmission component and the light focusing structure are arranged in a one-to-one correspondence. The light transmission component includes a phosphor carrier and an optical fiber. One end of the optical fiber is positioned corresponding to the light outlet of the laser source, and the other end extends to the lamp head and is positioned corresponding to the focusing structure. The phosphor carrier is positioned on the lamp head and between the optical fiber and the focusing structure.

2. The shadowless lamp as described in claim 1, characterized in that, The light-emitting surface is an arc-shaped surface that is concave inward towards the lamp head.

3. The shadowless lamp as described in claim 2, characterized in that, The radius of the sphere containing the light-emitting surface is 100-200mm.

4. The shadowless lamp as described in claim 1, characterized in that, The phosphor carrier includes a fluorescent carrier and phosphor, wherein the fluorescent carrier is made of a transparent material and the phosphor is coated on the fluorescent carrier.

5. The shadowless lamp as described in claim 1, characterized in that, The light-concentrating structure includes a reflector and a deflecting component. The reflector is disposed on the light-emitting surface, and the light-transmitting component is positioned above the reflector via the deflecting component.

6. The shadowless lamp as described in claim 5, characterized in that, The lamp head is provided with a first light transmission channel that runs through both ends of the lamp head; The steering assembly includes a steering guide tube and a steering component. The steering guide tube is disposed within the first light transmission channel and extends out of the first light transmission channel to be positioned above the light-emitting surface. The optical fiber is inserted into the steering guide tube; the steering element and the phosphor carrier are disposed in the steering guide tube and positioned above the reflector; the other end of the optical fiber faces the steering element so that the light emitted from the optical fiber is reflected toward the phosphor carrier.

7. The shadowless lamp as described in claim 6, characterized in that, The steering component has a steering arc surface, and the other end of the optical fiber faces the steering arc surface.

8. The shadowless lamp as described in claim 5, characterized in that, The center curve of the reflector cup has a radius of curvature of 2-10 mm and a curvature of 0.1-0.5; the two ends of the reflector cup have radii of curvature of 20-30 mm and curvatures of 0.033-0.

05.

9. The shadowless lamp as described in claim 1, characterized in that, The lamp head is provided with a second light transmission channel that runs through both ends of the lamp head; The light-gathering structure is a lens, with an exit surface at one end and an entrance port at the other end; the exit surface and the exit surface are arranged correspondingly, and the lens, phosphor carrier, and optical fiber are arranged sequentially in the second light transmission channel; the other end of the optical fiber is arranged correspondingly to the entrance port, and the phosphor carrier is arranged in the entrance port.

10. The shadowless lamp as described in claim 9, characterized in that, The lens is a TIR lens.

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