1. A laser lighting device, characterized by: the device comprises a power supply, a photoelectric conversion module, an optical fiber group and a laser excitation device;

the photoelectric conversion module comprises a laser chip and an optical system, wherein the laser chip is used for converting current into laser, and the optical system is used for converting divergent laser into parallel laser;

the optical fiber group is a transmission component, the photoelectric conversion module is connected with the laser excitation device, and parallel laser enters the optical fiber group and is transmitted to the output end of the optical fiber group through the optical fiber group; the output end of the optical fiber group is provided with an optical fiber connecting terminal, and the optical fiber group is connected with the laser excitation device through the optical fiber connecting terminal and transmits parallel laser to the laser excitation device;

the laser excitation device comprises a nut, a laser excitation device fixing piece, a diffusion lens, a lens compression ring, a fluorescent cap and a fluorescent cap compression ring;

a ceramic ferrule limiting hole is formed in one end of the laser excitation device fixing part and used for fixing the ceramic ferrule; the outer part of the ceramic core pressing ring is provided with a ceramic core pressing ring connecting thread which is used for connecting with the ceramic core pressing ring;

a lens limiting hole and a lens pressing ring limiting hole are formed in the other end of the laser excitation device fixing piece, the diffusion lens is fixed in the lens limiting hole of the laser excitation device fixing piece through the lens pressing ring limiting hole by the lens pressing ring, a fluorescent cap limiting step is arranged on the lens pressing ring, and the fluorescent cap is connected with the lens pressing ring through the fluorescent cap limiting step; a fluorescent cap pressing ring connecting thread and an excitation seat limiting ring are arranged outside the laser excitation device, and the fluorescent cap pressing ring is connected with the laser excitation device fixing piece through the fluorescent cap pressing ring connecting thread;

an inner cavity is formed in the middle of the laser excitation device fixing piece; the outer part of the nut is provided with an excitation seat fixing thread, and the nut is connected with the laser excitation device fixing part through the excitation seat fixing thread;

parallel laser enters the inner cavity of the laser excitation device, is converted by the diffusion lens and then irradiates the fluorescent cap and excites white light.

2. A laser lighting device as claimed in claim 1, wherein: the front end of the lamp is provided with a light reflecting cup for controlling light distribution.

3. A laser lighting device as claimed in claim 1, wherein: the photoelectric conversion module further comprises a constant current module and a fan, wherein the constant current module is used for stabilizing current, and the fan is used for heat dissipation of the laser chip.

4. A laser lighting device as claimed in claim 1, wherein: the optical system is a lens or a lens group.

5. A laser lighting device as claimed in claim 1, wherein: the optical fiber connecting terminal comprises an optical fiber, an optical fiber tail handle, a ceramic ferrule and a ceramic ferrule pressing 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 in a T-shaped cylinder or petal shape, one end of the optical fiber tail handle is inserted into the optical fiber armor and is tightly connected with the optical fiber armor; one end of the optical fiber armor is exposed, and a round hole matched with the ceramic ferrule is formed in the end, exposed out of the optical fiber armor; the optical fiber tail handle is fixedly connected with the ceramic ferrule through the round hole; the center of the optical fiber tail handle is provided with a first through hole along the length direction of the optical fiber tail handle, the center of the ceramic ferrule is provided with a second through hole along the length direction of the ceramic ferrule, and the first through hole and the second through hole are concentrically communicated; the bare optical fiber penetrates through the first through hole and the second through hole in sequence, and the optical fiber tight sleeve layer is wrapped outside the bare optical fiber penetrating through the first through hole; the ceramic core compression ring is fixedly sleeved on the optical fiber armor and is used for being connected with the laser excitation device fixing piece.

6. A laser lighting device as claimed in claim 1, wherein: the diffusion lens is a plano-concave lens, and the thickness of the diffusion lens is 3-5 mm.

7. A laser lighting device as claimed in claim 1, wherein: still be equipped with lens clamping ring connecting thread and lens clamping ring on the lens clamping ring and screw up the groove.

8. A laser lighting device as claimed in claim 1, wherein: the fluorescent cap is made of silica gel and yellow fluorescent powder, the length of the fluorescent cap is 15-30mm, and the diameter of the fluorescent cap is 10-20 mm.

9. A laser lighting device as claimed in claim 1, wherein: the laser wavelength is 450nm +/-50 nm.

10. A laser lighting device as claimed in claim 1, wherein: the length of the inner cavity is 10-18mm, and the inner wall of the inner cavity is coated with a nickel layer or an aluminum layer.

Background

The traditional LED optical fiber illumination generally adopts white light and plastic optical fibers, because the plastic optical fibers have large light loss and short transmission distance, and because the white light is formed by mixing light with various wavelengths, the light color is shifted after the application end due to different loss of each wavelength in the optical fibers in the transmission process, and the development of the optical fiber illumination is limited to a certain extent.

Patent document No. CN105222021B discloses a laser electroless lighting system, in which although a laser LD is implemented by a quartz fiber, the light emitting portion is excited by reflection, and the excitation device uses ceramic phosphor, so that the obtained light efficiency is low, and the light reflected by the ceramic phosphor to the inside of the fiber may damage the laser LD to some extent, and the service life of the laser LD is reduced.

Disclosure of Invention

The invention aims to provide a laser lighting device, which adopts a quartz optical fiber to improve the transmission distance of optical fiber conduction lighting; transmission type excitation is adopted, so that the light emitting efficiency and the service life of the laser LD are improved; meanwhile, the light-emitting end adopts a diffusion lens to expand light, so that a silica gel type fluorescent cap can be adopted, and the safety is improved.

In order to achieve the purpose, the technical scheme of the invention is as follows: a laser lighting device comprises a power supply, a photoelectric conversion module, an optical fiber group and a laser excitation device;

the photoelectric conversion module comprises a laser chip and an optical system, wherein the laser chip is used for converting current into laser, and the optical system is used for converting divergent laser into parallel laser;

the optical fiber group is a transmission component, the photoelectric conversion module is connected with the laser excitation device, and parallel laser enters the optical fiber group and is transmitted to the output end of the optical fiber group through the optical fiber group; the output end of the optical fiber group is provided with an optical fiber connecting terminal, and the optical fiber group is connected with the laser excitation device through the optical fiber connecting terminal and transmits parallel laser to the laser excitation device;

the laser excitation device comprises a nut, a laser excitation device fixing piece, a diffusion lens, a lens compression ring, a fluorescent cap and a fluorescent cap compression ring;

a ceramic ferrule limiting hole is formed in one end of the laser excitation device fixing part and used for fixing the ceramic ferrule; the outer part of the ceramic core pressing ring is provided with a ceramic core pressing ring connecting thread which is used for connecting with the ceramic core pressing ring;

a lens limiting hole and a lens pressing ring limiting hole are formed in the other end of the laser excitation device fixing piece, the diffusion lens is fixed in the lens limiting hole of the laser excitation device fixing piece through the lens pressing ring limiting hole by the lens pressing ring, a fluorescent cap limiting step is arranged on the lens pressing ring, and the fluorescent cap is connected with the lens pressing ring through the fluorescent cap limiting step; a fluorescent cap pressing ring connecting thread and an excitation seat limiting ring are arranged outside the laser excitation device, and the fluorescent cap pressing ring is connected with the laser excitation device fixing piece through the fluorescent cap pressing ring connecting thread;

an inner cavity is formed in the middle of the laser excitation device fixing piece; the outer part of the nut is provided with an excitation seat fixing thread, and the nut is connected with the laser excitation device fixing part through the excitation seat fixing thread;

parallel laser enters the inner cavity of the laser excitation device, is converted by the diffusion lens and then irradiates the fluorescent cap and excites white light.

Furthermore, the light-emitting device also comprises a light-reflecting cup arranged at the front end and used for controlling light distribution.

Further, the photoelectric conversion module further comprises a constant current module and a fan, wherein the constant current module is used for stabilizing current, and the fan is used for radiating the laser chip.

Further, the optical system is a lens or a lens group.

Furthermore, the optical fiber connecting terminal comprises an optical fiber, an optical fiber tail handle, a ceramic ferrule and a ceramic ferrule pressing 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 in a T-shaped cylinder or petal shape, one end of the optical fiber tail handle is inserted into the optical fiber armor and is tightly connected with the optical fiber armor; one end of the optical fiber armor is exposed, and a round hole matched with the ceramic ferrule is formed in the end, exposed out of the optical fiber armor; the optical fiber tail handle is fixedly connected with the ceramic ferrule through the round hole; the center of the optical fiber tail handle is provided with a first through hole along the length direction of the optical fiber tail handle, the center of the ceramic ferrule is provided with a second through hole along the length direction of the ceramic ferrule, and the first through hole and the second through hole are concentrically communicated; the bare optical fiber penetrates through the first through hole and the second through hole in sequence, and the optical fiber tight sleeve layer is wrapped outside the bare optical fiber penetrating through the first through hole; the ceramic core compression ring is fixedly sleeved on the optical fiber armor and is used for being connected with the laser excitation device fixing piece.

Further, the diffusion lens is a plano-concave lens, and the thickness of the diffusion lens is 3-5 mm.

Further, still be equipped with lens clamping ring connecting thread and lens clamping ring on the lens clamping ring and screw up the groove.

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

Further, the laser wavelength is 450nm +/-50 nm.

Further, the length of the inner cavity is 10-18mm, and the inner wall of the inner cavity is coated with a nickel layer or an aluminum layer.

The working principle of the technical scheme is as follows: the power supply converts electricity into parallel laser through the photoelectric conversion module, wherein the current forms stable current through the constant current module, the stable current is converted into divergent laser through the laser chip, the fan is used for heat dissipation of the laser chip, and the divergent laser is converted into the parallel laser through the optical system; parallel laser is transmitted to the laser excitation device through the optical fiber group, enters the inner cavity of the laser excitation device, is converted by the diffusion lens, irradiates the fluorescent cap and excites white light to illuminate.

The laser lighting device has the advantages that:

1. the laser wavelength is 450nm +/-50 nm, the power is high, and quartz optical fiber is adopted for transmission, so that the transmission can be carried out at a longer distance. The laser wavelength is 450nm +/-50 nm, and the single power can reach about 3-5W; the quartz fiber has a small loss value for light with a wavelength of 450nm +/-50 nm, and the loss of the quartz fiber is only about 6% of that of the plastic fiber, so that the quartz fiber can transmit a longer distance.

2. And by adopting transmission type excitation, the light-emitting efficiency and the service life of the laser LD are improved, and the safety is also improved. The light-emitting end adopts the diffusion lens to expand light, on one hand, the light can not be reflected into the optical fiber, and the light-emitting efficiency and the service life of the laser LD are improved; on the other hand, the light can be dispersed at various angles, so that the energy is dispersed in the space angle, the energy received by each unit point is small, the temperature is low, and the silica gel fluorescent cap can be adopted for excitation; in addition, the light diffusion by adopting the diffusion lens can improve the safety, and potential safety hazards can not be caused even if the fluorescent cap falls off due to low unit energy.

3. By adopting the ceramic ferrule, laser loss is small and luminous efficiency is high when laser is transmitted.

4. When the length of the inner cavity of the laser excitation device is 10-18mm and the thickness of the diffusion lens is 3-5mm, the laser excitation efficiency is highest; meanwhile, the inner wall of the inner cavity is coated with a nickel layer or an aluminum layer, so that the laser excitation efficiency can be improved.

5. By adopting the optical fiber group to separate the power supply part from the illumination part, the power supply can be completely isolated in the production and storage areas of dangerous goods, and the illumination safety problem is improved.

The laser lighting device has the advantages of high light emitting efficiency, long service life, high safety and the like.

Drawings

FIG. 1 is a schematic structural diagram of a laser lighting device according to the present invention;

FIG. 2 is a schematic structural diagram of an optical fiber connection terminal according to the present invention;

FIG. 3 is a schematic diagram of a laser excitation device firmware according to the present invention;

fig. 4 is a schematic structural diagram of the lens compression ring of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: 1. a power source; 2. a photoelectric conversion module; 21. a laser chip; 22. an optical system; 3. a group of optical fibers; 4. an optical fiber connection terminal; 41. an optical fiber; 411. an optical fiber armor; 412. an optical fiber tight-buffered layer; 413. a bare optical fiber; 42. a fiber pigtail handle; 43. a ceramic ferrule; 44. a ceramic core compression ring; 5. a nut; 6. laser excitation device firmware; 61. a ceramic ferrule limit hole; 62. the ceramic core compression ring is connected with threads; 63. a lens limiting hole; 64. limiting holes of the lens compression ring; 65. the fluorescent cap compression ring is connected with the thread; 66. an excitation seat limiting ring; 67. an inner cavity; 68. exciting seat fixing threads; 7. a diffusion lens; 8. a lens compression ring; 81. a fluorescent cap limiting step; 82. the lens compression ring is connected with the thread; 83. the lens compression ring screwing groove; 9. a fluorescent cap; 10. and a fluorescent cap pressing ring.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiments are substantially as shown in figures 1 to 4 of the accompanying drawings: a laser lighting device comprises a power supply 1, a photoelectric conversion module 2, an optical fiber group 3 and a laser excitation device; the photoelectric conversion module 2 comprises a laser chip 21 and an optical system 22, wherein the laser chip 21 is used for converting current into laser, the laser is blue light, the laser wavelength is 450nm +/-50 nm, and the optical system 22 is a lens or a lens group and is used for converting divergent laser into parallel laser; the optical fiber group 3 is a transmission component, the photoelectric conversion module 2 is connected with the laser excitation device, and parallel laser enters the optical fiber group 3 and is transmitted to the output end of the optical fiber group 3; the output end of the optical fiber group 3 is provided with an optical fiber connecting terminal 4, and the optical fiber group 3 is connected with the laser excitation device through the optical fiber connecting terminal 4 and transmits parallel laser to the laser excitation device. The optical fiber connecting terminal 4 comprises an optical fiber 41, an optical fiber tail handle 42, a ceramic ferrule 43 and a ceramic ferrule pressing ring 44; the optical fiber 41 is a quartz optical fiber and comprises 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 in a T-shaped cylinder or petal shape, one end of the optical fiber tail handle is inserted into the optical fiber armor 411 and is tightly connected with the optical fiber armor 411; one end of the optical fiber armor 411 is exposed, and a round hole matched with the ceramic ferrule 43 is formed in the end, exposed out of the optical fiber armor 411; the optical fiber tail handle 42 is fixedly connected with the ceramic ferrule 43 through a circular hole, and the ceramic ferrule 43 is adopted, so that the laser loss is small, and the luminous efficiency is high; the center of the optical fiber tail handle 42 is provided with a first through hole along the length direction, the center of the ceramic ferrule 43 is provided with a second through hole along the length direction, and the first through hole and the second through hole are concentrically communicated; the bare fiber 413 sequentially penetrates through the first through hole and the second through hole, and an optical fiber tight sleeve layer 412 is wrapped outside the bare fiber 413 penetrating through the first through hole; the ceramic core press ring 44 is fixedly sleeved on the optical fiber armor 411 and is used for being connected with the laser excitation device fixing piece 6.

The laser excitation device comprises a nut 5, a laser excitation device fixing piece 6, a diffusion lens 7, a lens pressing ring 8, a fluorescent cap 9 and a fluorescent cap pressing ring 10; a ceramic ferrule limiting hole 61 is formed in one end of the laser excitation device fixing part 6 and used for fixing the ceramic ferrule 43, and the ceramic ferrule 43 is inserted into the ceramic ferrule limiting hole 61 and fixedly connected with the laser excitation device fixing part 6; and a ceramic core pressing ring connecting thread 62 is arranged outside and used for being connected with the ceramic core pressing ring 44. A lens limiting hole 63 and a lens press ring limiting hole 64 are arranged in the other end of the laser excitation device fixing piece 6, the lens limiting hole 63 is used for fixing the diffusion lens 7, the diffusion lens 7 is a plano-concave lens with the thickness of 3-5mm, the lens press ring limiting hole 64 is used for fixing the lens press ring 8, the lens press ring 8 fixes the diffusion lens 7 in the lens limiting hole 63 of the laser excitation device fixing piece 6 through the lens press ring limiting hole 64, a fluorescent cap limiting step 81, a lens press ring connecting thread 82 and a lens press ring screwing groove 83 are arranged on the lens press ring 8, the fluorescent cap 9 is connected with the lens press ring 8 through the fluorescent cap limiting step 81, the lens press ring 8 is connected with the lens press ring limiting hole 64 through the lens press ring connecting thread 82, the lens press ring screwing groove 83 is used for screwing the lens press ring 8, the fluorescent cap 9 is made of silica gel and yellow fluorescent powder, and the silica gel and the yellow fluorescent powder are proportioned according to a certain proportion, the fluorescent cap is manufactured by a die, the length of the fluorescent cap 9 is 15-30mm, and the diameter of the fluorescent cap is 10-20 mm; the outside is equipped with fluorescence cap clamping ring connecting thread 65 and arouses seat stop collar 66, and fluorescence cap clamping ring 10 passes through fluorescence cap clamping ring connecting thread 65 and is connected with laser excitation device firmware 6. An inner cavity 67 is formed in the middle of the laser excitation device fixing piece 6, the length of the inner cavity 67 is 10-18mm, and a nickel layer or an aluminum layer is coated on the inner wall of the inner cavity 67, so that the laser excitation efficiency can be improved; an excitation seat fixing thread 68 is arranged on the outer part, and the nut 5 is connected with the laser excitation device fixing part 6 through the excitation seat fixing thread 68.

The parallel laser enters the inner cavity of the laser excitation device fixing piece 6, is converted by the diffusion lens 7, then irradiates the fluorescent cap 9 and excites white light. Specifically, when the length of the inner cavity of the laser excitation device fixing piece 6 is 10-18mm and the thickness of the diffusion lens 7 is 3-5mm, the laser excitation efficiency is highest.

Specifically, the photoelectric conversion module 2 further includes a constant current module for stabilizing a current and a fan for dissipating heat of the laser chip 21.

Specifically, the laser lighting device further comprises a light reflecting cup arranged at the front end and used for controlling light distribution.

The invention adopts the quartz optical fiber for transmission, and can transmit a longer distance; meanwhile, the laser wavelength is 450nm +/-50 nm, and the single power can reach about 3-5W; the quartz fiber has a small loss value for light with a wavelength of 450nm +/-50 nm, and the loss of the quartz fiber is only about 6% of that of the plastic fiber, so that the quartz fiber can transmit a longer distance.

The light-emitting end adopts the diffusion lens to expand light, on one hand, the light can not be reflected into the optical fiber, so that the laser LD can not be damaged, the light-emitting efficiency is improved, and the service life of the laser LD is prolonged; on the other hand, the light can be dispersed at various angles, so that the energy is dispersed in the space angle, the energy received by each unit point is small, the temperature is low, and the silica gel fluorescent cap can be adopted for excitation; in addition, the safety can be improved by adopting the lens to expand light, and potential safety hazards can not be caused even if the fluorescent cap falls off due to low unit energy.

The power supply part and the illumination part are separated by adopting the optical fiber group, so that the power supply can be completely isolated in the production and storage areas of dangerous goods, and the illumination safety problem is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.