1. A multi-tube laser conduction illumination system adopting echo infrared detection is characterized in that: the system comprises a multi-tube laser conduction lighting system, an infrared detection system, a control circuit and a power supply unit;

the multi-tube laser conduction illumination system comprises a plurality of blue light emitting units, a first filtering system, a coupling lens, a transmission optical fiber, a second collimating lens, a diffusion lens and a fluorescent cap; each blue light emitting unit comprises a blue LD, a shaping lens, a first collimating lens and a reflector; the transmission optical fiber comprises an incident end and an output end, wherein the incident end is provided with a ceramic ferrule APC, and the output end is provided with a ceramic ferrule PC; the blue light irradiated by each blue light LD enters the transmission optical fiber through the shaping lens, the first collimating lens, the reflector, the first filtering system and the coupling lens respectively and is transmitted to the output end of the transmission optical fiber through the transmission optical fiber; each reflector reflects the blue light of the corresponding blue LD to the first filtering system; the first light filtering system reflects the multiple blue light beams to the coupling lens; the inclination angle of the bevel edge of the blue light incident end of the ceramic ferrule APC is 7-9 degrees; the output end of the transmission optical fiber is provided with a second collimating lens, a third filtering system, a diffusion lens and a fluorescent cap, and the blue light output by the PC is converted by the diffusion lens through the second collimating lens and the third filtering system, then irradiates the fluorescent cap and excites white light;

the infrared detection system comprises an infrared LD, a third collimating lens, a second light filtering system, a third light filtering system and a photoelectric element PD, and red light irradiated by the infrared LD enters the transmission optical fiber through the third collimating lens, the second light filtering system, the first light filtering system and the coupling lens respectively and is transmitted to the output end of the transmission optical fiber through the transmission optical fiber; the second filter system reflects the red light of the infrared LD to the first filter system and transmits the first filter system; red light output by the output end of the transmission optical fiber passes through the second collimating lens and is reflected back by the third light filtering system, the reflected red light is transmitted to the photoelectric element PD, and the photoelectric element PD performs echo detection on the reflected red light;

the infrared detection system is used for transmitting a signal detected by the photoelectric element PD to the control circuit; the control circuit outputs a control signal to control the power supply unit to power off and supply the blue LD after judging according to the red light echo detection of the infrared detection system; when the photoelectric element PD cannot receive the red light reflected by the third light filtering system, the power supply is controlled to be switched off;

the first light filtering system can reflect blue light and can also transmit red light; the second light filtering system can reflect red light and can also transmit the red light; the third filter system can reflect red light and transmit blue light.

2. A multi-tube laser conduction illumination system using echo infrared detection according to claim 1, characterized in that: the diffusion lens is a plano-concave lens, and the thickness of the diffusion lens is 3-5 mm.

3. A multi-tube laser conduction illumination system using echo infrared detection according to claim 1, characterized in that: 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.

4. A multi-tube laser conduction illumination system using echo infrared detection according to claim 1, characterized in that: the blue light wavelength of the blue light LD is 450nm +/-50 nm.

Background

The traditional illumination mainly adopts the mode that electricity is arranged in an area needing illumination, electric energy is converted into light through a photoelectric conversion chip, illumination is carried out after photoelectric conversion is achieved, safety accidents are easily caused due to the fact that photoelectric conversion is carried out in the illumination area, laser light conducts illumination, after the photoelectric conversion is achieved remotely, light with specific wavelength is transmitted to a place needing to be applied through optical fibers, the light with the specific wavelength is converted into needed white light through a fluorescent powder technology, and therefore electricity is not used in a use area, and photoelectric separation is achieved.

The laser light conduction illumination mainly uses light conduction, as the optical fiber adopts a quartz optical fiber, the fiber core is small, the optical fiber can be broken under the action of external force, after the optical fiber is broken, the whole illumination is in a non-illumination state, if a power supply is not cut off in time, light with specific wavelength can be lightened for a long time at the breaking position, the breaking position is in a closed state, energy can not be completely released, the overheating is easily caused under the long-time state, the heat reaches a certain level, the whole illumination system can be damaged, and under the condition of overhigh heat, a fire disaster can be caused or peripheral substances can be damaged.

Disclosure of Invention

The present invention is directed to a multi-tube laser conduction illumination system using echo infrared detection, so as to solve the technical problems in the prior art.

In order to achieve the purpose, the technical scheme of the invention is as follows: a multi-tube laser conduction lighting system adopting echo infrared detection comprises a multi-tube laser conduction lighting system, an infrared detection system, a control circuit and a power supply unit;

the multi-tube laser conduction illumination system comprises a plurality of blue light emitting units, a first filtering system, a coupling lens, a transmission optical fiber, a second collimating lens, a diffusion lens and a fluorescent cap; each blue light emitting unit comprises a blue LD, a shaping lens, a first collimating lens and a reflector; the transmission optical fiber comprises an incident end and an output end, wherein the incident end is provided with a ceramic ferrule APC, and the output end is provided with a ceramic ferrule PC; the blue light irradiated by each blue light LD enters the transmission optical fiber through the shaping lens, the first collimating lens, the reflector, the first filtering system and the coupling lens respectively and is transmitted to the output end of the transmission optical fiber through the transmission optical fiber; each reflector reflects the blue light of the corresponding blue LD to the first filtering system; the first light filtering system reflects the multiple blue light beams to the coupling lens; the inclination angle of the bevel edge of the blue light incident end of the ceramic ferrule APC is 7-9 degrees; the output end of the transmission optical fiber is provided with a second collimating lens, a third filtering system, a diffusion lens and a fluorescent cap, and the blue light output by the PC is converted by the diffusion lens through the second collimating lens and the third filtering system, then irradiates the fluorescent cap and excites white light;

the infrared detection system comprises an infrared LD, a third collimating lens, a second light filtering system, a third light filtering system and a photoelectric element PD, and red light irradiated by the infrared LD enters the transmission optical fiber through the third collimating lens, the second light filtering system, the first light filtering system and the coupling lens respectively and is transmitted to the output end of the transmission optical fiber through the transmission optical fiber; the second filter system reflects the red light of the infrared LD to the first filter system and transmits the first filter system; red light output by the output end of the transmission optical fiber passes through the second collimating lens and is reflected back by the third light filtering system, the reflected red light is transmitted to the photoelectric element PD, and the photoelectric element PD performs echo detection on the reflected red light;

the infrared detection system is used for transmitting a signal detected by the photoelectric element PD to the control circuit; the control circuit outputs a control signal to control the power supply unit to power off and supply the blue LD after judging according to the red light echo detection of the infrared detection system; when the photoelectric element PD cannot receive the red light reflected by the third light filtering system, the power supply is controlled to be switched off;

the first light filtering system can reflect blue light and can also transmit red light; the second light filtering system can reflect red light and can also transmit the red light; the third filter system can reflect red light and transmit blue light.

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

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 blue light wavelength of the blue light LD is 450nm +/-50 nm.

The infrared detection system adopts the independent infrared optical fiber, can monitor the light emitting condition in time, and if the transmission optical fiber is broken, the photoelectric element PD can not receive the red light reflected by the third light filtering system, thereby giving an instruction of cutting off the power supply.

The multi-tube laser conduction illumination system adopting the echo infrared detection has the advantages that:

1. and optical fiber conduction is adopted, so that photoelectric separation is realized, and the illumination safety problem is improved.

2. The blue light wavelength is 450nm +/-50 nm, the power is high, and the quartz optical fiber is adopted for transmission, so that the optical fiber transmission illumination transmission distance is increased. The wavelength of blue light 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.

3. And by adopting transmission excitation, the light-emitting efficiency and the service life of the blue light LD are improved, and the safety is also improved. The output end adopts a diffusion lens to expand light, so that the light can be dispersed at various angles, the energy is dispersed in a 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.

4. By adopting the ceramic ferrule APC and the ceramic ferrule PC, laser loss is small when laser is transmitted, the light emitting efficiency is high, and the light emitting efficiency is highest when the inclined angle of the inclined edge of the blue light incidence end of the ceramic ferrule APC is 7-9 degrees.

5. When the thickness of the diffusion lens is 3-5mm, the laser excitation efficiency is highest.

6. A plurality of blue light LDs are adopted, single fiber energy can be effectively improved, the number of optical fibers is reduced, and construction cost is saved.

7. And an infrared detection system is adopted, so that the light emitting condition can be monitored in time, and the safety is improved. Meanwhile, the infrared wavelength energy is higher, and a system is formed independently, so that the monitoring is more accurate.

The multi-tube laser conduction lighting system adopting the echo infrared detection has the advantages of high light emitting efficiency, high safety and the like.

Drawings

Fig. 1 is a schematic structural diagram of a multi-tube laser conduction illumination system using echo infrared detection according to 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 blue LD; 2. a shaping lens; 3. a first collimating lens; 4. a mirror; 5. a first filtering system; 6. a coupling lens; 7. a transmission optical fiber; 71. the ceramic ferrule APC; 72. a ceramic ferrule PC; 8. a second collimating lens; 9. a diffusion lens; 10. a fluorescent cap; 11. an infrared LD; 12. a third collimating lens; 13. a second filtering system; 14. a third filtering system; 15. a photoelectric element PD; 16. a control circuit; 17. a power supply unit.

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 embodiment is basically as shown in the attached figure 1: a multi-tube laser conduction lighting system adopting echo infrared detection comprises a multi-tube laser conduction lighting system, an infrared detection system, a control circuit 16 and a power supply unit 17;

the multi-tube laser conduction illumination system comprises a plurality of blue light emitting units, a first filtering system 5, a coupling lens 6, a transmission optical fiber 7, a second collimating lens 8, a diffusion lens 9 and a fluorescent cap 10; each blue light emitting unit includes a blue LD1, a shaping lens 2, a first collimating lens 3, and a reflecting mirror 4; the transmission optical fiber 7 is a quartz optical fiber and comprises an incident end and an output end, wherein the incident end is provided with a ceramic ferrule APC 71, and the output end is provided with a ceramic ferrule PC 72; blue light irradiated by each blue light LD1 enters a transmission optical fiber 7 through a shaping lens 2, a first collimating lens 3, a reflector 4, a first filtering system 5 and a coupling lens 6 respectively and is transmitted to the output end of the transmission optical fiber 7 through the transmission optical fiber 7, and the wavelength of the blue light is 450nm +/-50 nm; each mirror 4 reflects the blue light of the corresponding blue LD1 to the first filter system 5; the first filtering system 5 reflects the plurality of blue light beams to the coupling lens 6; the inclined angle of the inclined edge of the blue light incident end of the ceramic ferrule APC 71 is 7-9 degrees; the output end of the transmission optical fiber 7 is provided with a second collimating lens 8, a third filtering system 14, a diffusion lens 9 and a fluorescent cap 10, and blue light output by the ceramic ferrule PC 72 passes through the second collimating lens 8 and the third filtering system 14, is converted by the diffusion lens 9, then irradiates on the fluorescent cap 10 and excites white light; the diffusion lens 9 is a plano-concave lens with the thickness of 3-5 mm; the fluorescent cap 10 is made of silica gel and yellow fluorescent powder, and is made of the silica gel and the yellow fluorescent powder according to a certain proportion through a mould, and the length of the fluorescent cap 10 is 15-30mm, and the diameter of the fluorescent cap 10 is 10-20 mm.

The infrared detection system comprises an infrared LD 11, a third collimating lens 12, a second light filtering system 13, a third light filtering system 14 and a photoelectric element PD15, wherein red light irradiated by the infrared LD 11 enters the transmission optical fiber 7 through the third collimating lens 12, the second light filtering system 13, the first light filtering system 5 and the coupling lens 6 respectively, and is transmitted to the output end of the transmission optical fiber 7 through the transmission optical fiber 7; the second filter system 13 reflects the red light of the infrared LD 11 to the first filter system 5 and transmits the first filter system 5; the red light output by the output end of the transmission optical fiber 7 passes through the second collimating lens 8 and then is reflected back by the third optical filtering system 14, the reflected red light is transmitted to the photoelectric element PD15, and the photoelectric element PD15 performs echo detection on the reflected red light;

the infrared detection system is used for transmitting a signal detected by the photoelectric element PD15 to the control circuit 16; after the control circuit 16 determines according to the red light echo detection of the infrared detection system, it outputs a control signal to control the power supply unit 17 to power off and supply the blue light LD 1; when the photoelectric element PD15 does not receive the red light reflected by the third optical filter system 14, the power supply is controlled to be switched off;

the first light filtering system 5 can reflect blue light and can also transmit red light; the second filter system 13 can reflect red light and can also transmit red light; the third filter system 14 may reflect red light and may also transmit blue light.

Specifically, the blue LD1, the infrared LD 11, the photoelectric element PD15, and the power supply unit 17 are each connected to the control circuit 16.

The red light output by the output end of the transmission fiber 7 of the invention is reflected by the third optical filter system 14, passes through the second collimating lens 8, the transmission fiber 7, the coupling lens 6, the first optical filter system 5 and the second optical filter system 13, and is transmitted to the photoelectric element PD 15.

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.