Laser lighting device

Abstract

The present invention belongs to the field of lighting technology, and specifically discloses a laser lighting device, including a power supply, a photoelectric conversion module, an optical fiber group, and a laser excitation device; the photoelectric conversion module converts current into laser; the optical fiber group is a transmission component, and the output end of the optical fiber group is provided with an optical fiber connection terminal, through which the laser is transmitted to the laser excitation device; the laser excitation device includes a nut, a laser excitation device firmware, a diffusion lens, a lens pressure ring, a fluorescent cap, and a fluorescent cap pressure ring; the laser enters the inner cavity of the laser excitation device firmware, and after being converted by the diffusion lens, it irradiates the fluorescent cap and excites white light. The laser lighting device of the present invention has the advantages of high light output efficiency, long service life, and high safety.

Description

Technical Field

[0001] The invention belongs to the technical field of lighting, and in particular relates to a laser lighting device. Background Art

[0002] Traditional LED fiber optic lighting usually uses white light and plastic optical fiber. Since plastic optical fiber has large light loss and short transmission distance, and since white light is a mixture of multiple wavelengths, the loss of each wavelength in the optical fiber is different during the transmission process, resulting in light color shift after reaching the application end, which to a certain extent limits the development of fiber optic lighting.

[0003] The patent document with authorization announcement number CN105222021B discloses a laser non-electric lighting system. Although the laser LD is implemented through quartz optical fiber, the light output part adopts reflective excitation, and the excitation device uses ceramic phosphors. The light efficiency obtained is low, and the light reflected by the ceramic phosphors into the optical fiber will cause certain damage to the laser LD, thereby reducing the service life of the laser LD. Summary of the invention

[0004] The purpose of the present invention is to provide a laser lighting device, which adopts quartz optical fiber to increase the transmission distance of optical fiber-conducted lighting; adopts transmission excitation to improve the light output efficiency and laser LD life; at the same time, a diffusion lens is used at the light output end to expand the light, so that a silicone fluorescent cap can be used to improve safety.

[0005] In order to achieve the above-mentioned object, the technical solution of the present invention is: a laser lighting device, including a power supply, a photoelectric conversion module, an optical fiber group, and a laser excitation device;

[0006] The photoelectric conversion module includes a laser chip and an optical system, wherein the laser chip is used to convert electric current into laser light, and the optical system is used to convert divergent laser light into parallel laser light;

[0007] The optical fiber group is a transmission component, which connects the photoelectric conversion module and the laser excitation device. The parallel laser enters the optical fiber group and is transmitted to its output end through the optical fiber group. The output end of the optical fiber group is provided with an optical fiber connection terminal. The optical fiber group is connected to the laser excitation device through the optical fiber connection terminal and transmits the parallel laser to the laser excitation device.

[0008] The laser excitation device comprises a nut, a laser excitation device firmware, a diffusion lens, a lens pressure ring, a fluorescent cap, and a fluorescent cap pressure ring;

[0009] A ceramic core limiting hole is provided inside one end of the laser excitation device firmware for fixing the ceramic core; a ceramic core pressing ring connecting thread is provided outside for connecting with the ceramic core pressing ring;

[0010] A lens limiting hole and a lens pressure ring limiting hole are provided inside the other end of the laser excitation device firmware, and the lens pressure ring fixes the diffusion lens in the lens limiting hole of the laser excitation device firmware through the lens pressure ring limiting hole, and a fluorescent cap limiting step is provided on the lens pressure ring, and the fluorescent cap is connected to the lens pressure ring through the fluorescent cap limiting step; a fluorescent cap pressure ring connecting thread and an excitation seat limiting ring are provided on the outside, and the fluorescent cap pressure ring is connected to the laser excitation device firmware through the fluorescent cap pressure ring connecting thread;

[0011] An inner cavity is provided in the middle of the laser excitation device firmware; an excitation seat fixing thread is provided on the outside, and the nut is connected to the laser excitation device firmware through the excitation seat fixing thread;

[0012] The parallel laser light enters the inner cavity of the firmware of the laser excitation device, is converted by the diffusion lens, and is irradiated on the fluorescent cap to excite white light.

[0013] Furthermore, the photoelectric conversion module also includes a constant current module and a fan, wherein the constant current module is used to stabilize the current, and the fan is used to dissipate heat from the laser chip.

[0014] Furthermore, the optical system is a lens or a lens group.

[0015] Furthermore, the optical fiber connection terminal includes an optical fiber, an optical fiber tail handle, a ceramic ferrule, and a ceramic core pressure ring; the optical fiber includes an optical fiber armor, an optical fiber tight sleeve layer, and a bare optical fiber; the optical fiber tail handle is a T-shaped cylinder or petal-shaped, one end of which is inserted into the optical fiber armor and tightly connected to the optical fiber armor; one end exposes the optical fiber armor, and the end exposed from the optical fiber armor is provided with a circular hole that cooperates with the ceramic ferrule; the optical fiber tail handle is fixedly connected to the ceramic ferrule through the circular hole; the center of the optical fiber tail handle is provided with a first through hole along its length direction, and the center of the ceramic ferrule is provided with a second through hole along its length direction, and the first through hole is concentrically connected to the second through hole; the bare optical fiber is inserted into the first through hole and the second through hole in sequence, and the bare optical fiber passing through the first through hole is wrapped with the optical fiber tight sleeve layer; the ceramic core pressure ring is fixedly sleeved on the optical fiber armor for being connected with the firmware of the laser excitation device.

[0016] Furthermore, the diffusion lens is a plano-concave lens with a thickness of 3-5 mm.

[0017] Furthermore, the lens pressing ring is also provided with a lens pressing ring connecting thread and a lens pressing ring tightening groove.

[0018] Furthermore, the fluorescent cap is made of silica gel and yellow fluorescent powder, and the length of the fluorescent cap is 15-30 mm and the diameter is 10-20 mm.

[0019] Furthermore, the laser wavelength is 450nm±50nm.

[0020] Furthermore, the inner cavity has a length of 10-18 mm, and the inner wall of the inner cavity is coated with a nickel layer or an aluminum layer.

[0021] The working principle of this technical solution is: the power supply converts electricity into parallel laser through the photoelectric conversion module, wherein the current passes through the constant current module to form a stable current, the stable current is converted into divergent laser through the laser chip, the fan is used to dissipate heat from the laser chip, and the divergent laser is converted into parallel laser through the optical system; the parallel laser is transmitted to the laser excitation device through the optical fiber group, the parallel laser enters the inner cavity of the laser excitation device firmware, and after conversion by the diffusion lens, it is irradiated on the fluorescent cap and excites white light for illumination.

[0022] The advantages of a laser lighting device of the present invention are as follows:

[0023] 1. The laser wavelength is 450nm±50nm, its power is large, and it uses quartz optical fiber for transmission, which can transmit over a longer distance. The laser wavelength is 450nm±50nm, and the power of a single laser can reach about 3-5W; the loss value of quartz optical fiber for light with a wavelength of 450nm±50nm is small, and its loss is only about 6% of that of plastic optical fiber, so it can transmit over a longer distance.

[0024] 2. Adopting transmission excitation improves the light extraction efficiency and laser LD life, and also improves safety. The light output end uses a diffusion lens to expand the light. On the one hand, the light will not be reflected into the optical fiber, which improves the light extraction efficiency and laser LD life; on the other hand, the light can be dispersed at various angles, thereby dispersing the energy in the spatial angle. The energy received by each unit point is small and the temperature is low, so a silicone fluorescent cap can be used for excitation; in addition, the use of a diffusion lens to expand the light can improve safety. Due to the low unit energy, even if the fluorescent cap falls off, it will not cause safety hazards.

[0025] 3. The ceramic ferrule is used, so the laser loss is small and the luminous efficiency is high during the transmission.

[0026] 4. When the inner cavity length of the laser excitation device firmware is 10-18mm and the thickness of the diffusion lens is 3-5mm, the laser excitation efficiency is the highest; at the same time, coating the inner wall of the inner cavity with a nickel layer or an aluminum layer can improve the laser excitation efficiency.

[0027] 5. By using optical fiber groups to separate the power supply part from the lighting part, the power supply can be completely isolated in the production and storage areas of dangerous goods, improving lighting safety issues.

[0028] The laser lighting device of the present invention has the advantages of high light output efficiency, long service life, high safety and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a laser lighting device of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the optical fiber connection terminal of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the firmware of the laser excitation device of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the lens pressure ring of the present invention. DETAILED DESCRIPTION

[0033] The following is further described in detail through specific implementation methods:

[0034] The figure marks in the drawings of the specification include: 1. power supply; 2. photoelectric conversion module; 21. laser chip; 22. optical system; 3. optical fiber group; 4. optical fiber connection terminal; 41. optical fiber; 411. optical fiber armor; 412. optical fiber tight sleeve layer; 413. bare optical fiber; 42. optical fiber tail handle; 43. ceramic ferrule; 44. ceramic core pressure ring; 5. nut; 6. laser excitation device firmware; 61. ceramic ferrule limiting hole; 62. ceramic core pressure ring connecting thread; 63. lens limiting hole; 64. lens pressure ring limiting hole; 65. fluorescent cap pressure ring connecting thread; 66. excitation seat limiting ring; 67. inner cavity; 68. excitation seat fixing thread; 7. diffusion lens; 8. lens pressure ring; 81. fluorescent cap limiting step; 82. lens pressure ring connecting thread; 83. lens pressure ring tightening groove; 9. fluorescent cap; 10. fluorescent cap pressure ring.

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The embodiment is basically as shown in the attached Figure 1 To Attachment Figure 4As shown: a laser lighting device, including a power supply 1, a photoelectric conversion module 2, an optical fiber group 3, and a laser excitation device; the photoelectric conversion module 2 includes a laser chip 21 and an optical system 22, the laser chip 21 is used to convert current into laser, the laser is blue light, and the laser wavelength is 450nm±50nm, the optical system 22 is a lens or a lens group, which is used to convert divergent laser into parallel laser; the optical fiber group 3 is a transmission component, which connects the photoelectric conversion module 2 and the laser excitation device, and the parallel laser enters the optical fiber group 3 and is transmitted to its output end through the optical fiber group 3; the output end of the optical fiber group 3 is provided with an optical fiber connection terminal 4, the optical fiber group 3 is connected to the laser excitation device through the optical fiber connection terminal 4, and transmits the parallel laser to the laser excitation device. The optical fiber connection terminal 4 includes an optical fiber 41, an optical fiber tail handle 42, a ceramic ferrule 43, and a ceramic core pressure ring 44; the optical fiber 41 is a quartz optical fiber, including an optical fiber armor 411, an optical fiber tight sleeve layer 412, and a bare optical fiber 413; the optical fiber tail handle 42 is a T-shaped cylinder or petal-shaped, one end of which is inserted into the optical fiber armor 411 and is tightly connected to the optical fiber armor 411; one end of the optical fiber armor 411 is exposed, and the end of the optical fiber armor 411 exposed is provided with a round hole that matches the ceramic ferrule 43; the optical fiber tail handle 42 and the ceramic ferrule 43 are connected by The circular hole is fixedly connected and a ceramic ferrule 43 is used, so the laser loss is small and the luminous efficiency is high; a first through hole is provided at the center of the optical fiber tail handle 42 along its length direction, and a second through hole is provided at the center of the ceramic ferrule 43 along its length direction, and the first through hole is concentrically connected with the second through hole; the bare optical fiber 413 is inserted into the first through hole and the second through hole in sequence, and the bare optical fiber 413 passing through the first through hole is wrapped with an optical fiber tight sleeve layer 412; the ceramic core pressure ring 44 is fixedly sleeved on the optical fiber armor 411, and is used to connect with the laser excitation device firmware 6.

[0037] The laser excitation device includes a nut 5, a laser excitation device firmware 6, a diffusion lens 7, a lens pressure ring 8, a fluorescent cap 9, and a fluorescent cap pressure ring 10; a ceramic core limiting hole 61 is provided inside one end of the laser excitation device firmware 6 for fixing the ceramic core 43, and the ceramic core 43 is inserted into the ceramic core limiting hole 61 and fixedly connected to the laser excitation device firmware 6; a ceramic core pressure ring connecting thread 62 is provided outside for connecting to the ceramic core pressure ring 44. A lens limiting hole 63 and a lens pressure ring limiting hole 64 are provided inside the other end of the laser excitation device firmware 6, and the lens limiting hole 63 is used to fix the diffusion lens 7, and the diffusion lens 7 is a plano-concave lens with a thickness of 3-5mm. The lens pressure ring limiting hole 64 is used to fix the lens pressure ring 8, and the lens pressure ring 8 fixes the diffusion lens 7 in the lens limiting hole 63 of the laser excitation device firmware 6 through the lens pressure ring limiting hole 64. The lens pressure ring 8 is provided with a fluorescent cap limiting step 81, a lens pressure ring connecting thread 82, and a lens pressure ring tightening groove 83, and the fluorescent cap 9 is connected to the laser excitation device firmware 6 through the fluorescent cap limiting platform. The step 81 is connected to the lens pressure ring 8, and the lens pressure ring 8 is connected to the lens pressure ring limiting hole 64 through the lens pressure ring connecting thread 82. The lens pressure ring tightening groove 83 is used to tighten the lens pressure ring 8. The fluorescent cap 9 is made of silicone and yellow fluorescent powder, and is made by a mold according to a certain ratio. The length of the fluorescent cap 9 is 15-30mm and the diameter is 10-20mm; the outside is provided with a fluorescent cap pressure ring connecting thread 65 and an excitation seat limiting ring 66, and the fluorescent cap pressure ring 10 is connected to the laser excitation device firmware 6 through the fluorescent cap pressure ring connecting thread 65. The middle of the laser excitation device firmware 6 is provided with an inner cavity 67 with a length of 10-18mm, and the inner wall of the inner cavity 67 is coated with a nickel layer or an aluminum layer, which can improve the laser excitation efficiency; the outside is provided with an excitation seat fixing thread 68, and the nut 5 is connected to the laser excitation device firmware 6 through the excitation seat fixing thread 68.

[0038] The parallel laser enters the inner cavity of the laser excitation device firmware 6, and after being converted by the diffusion lens 7, it irradiates the fluorescent cap 9 and excites white light. Specifically, when the inner cavity length of the laser excitation device firmware 6 is 10-18mm and the thickness of the diffusion lens 7 is 3-5mm, the laser excitation efficiency is the highest.

[0039] Specifically, the photoelectric conversion module 2 further includes a constant current module and a fan. The constant current module is used to stabilize the current, and the fan is used to dissipate heat from the laser chip 21 .

[0040] The present invention adopts quartz optical fiber for transmission, which can transmit over a longer distance; at the same time, the laser wavelength is 450nm±50nm, and the power of a single laser can reach about 3-5W; the loss value of quartz optical fiber for light with a wavelength of 450nm±50nm is small, and its loss is only about 6% of that of plastic optical fiber, so it can transmit over a longer distance.

[0041] The light output end uses a diffusion lens to expand the light. On the one hand, the light will not be reflected into the optical fiber, so it will not damage the laser LD, which improves the light output efficiency and the life of the laser LD; on the other hand, the light can be dispersed at various angles, thereby dispersing the energy in the spatial angle. The energy received by each unit point is small and the temperature is low, so a silicone fluorescent cap can be used for excitation; in addition, the use of lens expansion can improve safety. Due to the low unit energy, even if the fluorescent cap falls off, it will not cause safety hazards.

[0042] By using optical fiber groups to separate the power supply part from the lighting part, the power supply can be completely isolated in the production and storage areas of dangerous goods, improving lighting safety issues.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A laser lighting device, characterized in that: It includes a power supply, a photoelectric conversion module, an optical fiber group, and a laser excitation device; The photoelectric conversion module includes a laser chip and an optical system, wherein the laser chip is used to convert electric current into laser light, and the optical system is used to convert divergent laser light into parallel laser light; The optical fiber group is a transmission component, which connects the photoelectric conversion module and the laser excitation device. The parallel laser enters the optical fiber group and is transmitted to its output end through the optical fiber group. The output end of the optical fiber group is provided with an optical fiber connection terminal. The optical fiber group is connected to the laser excitation device through the optical fiber connection terminal and transmits the parallel laser to the laser excitation device. The laser excitation device comprises a nut, a laser excitation device firmware, a diffusion lens, a lens pressure ring, a fluorescent cap, and a fluorescent cap pressure ring; A ceramic core limiting hole is provided inside one end of the laser excitation device firmware for fixing the ceramic core; a ceramic core pressing ring connecting thread is provided outside for connecting with the ceramic core pressing ring; A lens limiting hole and a lens pressure ring limiting hole are provided inside the other end of the laser excitation device firmware, and the lens pressure ring fixes the diffusion lens in the lens limiting hole of the laser excitation device firmware through the lens pressure ring limiting hole, and a fluorescent cap limiting step is provided on the lens pressure ring, and the fluorescent cap is connected to the lens pressure ring through the fluorescent cap limiting step; a fluorescent cap pressure ring connecting thread and an excitation seat limiting ring are provided on the outside, and the fluorescent cap pressure ring is connected to the laser excitation device firmware through the fluorescent cap pressure ring connecting thread; An inner cavity is provided in the middle of the laser excitation device firmware; an excitation seat fixing thread is provided on the outside, and the nut is connected to the laser excitation device firmware through the excitation seat fixing thread; The parallel laser light enters the inner cavity of the firmware of the laser excitation device, is converted by the diffusion lens, and is irradiated on the fluorescent cap to excite white light.

2. A laser lighting device according to claim 1, characterized in that: The photoelectric conversion module further comprises a constant current module and a fan, wherein the constant current module is used to stabilize the current, and the fan is used to dissipate the heat of the laser chip.

3. A laser lighting device according to claim 1, characterized in that: The optical system is a lens or a lens group.

4. A laser lighting device according to claim 1, characterized in that: The optical fiber connection terminal comprises an optical fiber, an optical fiber tail handle, a ceramic ferrule, and a ceramic core pressure ring; the optical fiber comprises an optical fiber armor, an optical fiber tight sleeve layer, and a bare optical fiber; the optical fiber tail handle is a T-shaped cylinder or petal-shaped, one end of which is inserted into the optical fiber armor and tightly connected to the optical fiber armor; one end exposes the optical fiber armor, and the end exposed from the optical fiber armor is provided with a circular hole matched with the ceramic ferrule; the optical fiber tail handle is fixedly connected to the ceramic ferrule through the circular hole; the center of the optical fiber tail handle is provided with a first through hole along its length direction, and the center of the ceramic ferrule is provided with a second through hole along its length direction, and the first through hole is concentrically connected with the second through hole; the bare optical fiber is sequentially inserted into the first through hole and the second through hole, and the bare optical fiber passing through the first through hole is wrapped with the optical fiber tight sleeve layer; the ceramic core pressure ring is fixedly sleeved on the optical fiber armor for being connected with the firmware of the laser excitation device.

5. The laser lighting device according to claim 1, characterized in that: The diffusion lens is a plano-concave lens with a thickness of 3-5 mm.

6. The laser lighting device according to claim 1, characterized in that: The lens pressing ring is also provided with a lens pressing ring connecting thread and a lens pressing ring tightening groove.

7. The laser lighting device according to claim 1, characterized in that: The fluorescent cap is made of silica gel and yellow fluorescent powder, and has a length of 15-30 mm and a diameter of 10-20 mm.

8. The laser lighting device according to claim 1, characterized in that: The laser wavelength is 450nm±50nm.

9. The laser lighting device according to claim 1, characterized in that: The length of the inner cavity is 10-18 mm, and the inner wall of the inner cavity is coated with a nickel layer or an aluminum layer.

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