Light source system and laser light source

Patent metadata

Field	Value
Publication number	US-9819154-B2
Application number	US-201214351397-A
Country	US
Kind code	B2
Filing date	Aug 10, 2012
Priority date	Oct 11, 2011
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A light source system and a laser light source ( 300 ). The laser light source includes two groups of laser groups ( 20 a, 20 b ), wherein at least one group of laser groups includes at least two lasers ( 21 a, 21 b, 21 c, 21 d ), and the light beams (L 1 ) generated by the two groups of laser groups are in the same direction and parallel to each other. The first projections of the two groups of laser groups on the cross section of the light beams formed by the respective emergent light rays thereof are partially overlapped with the second projections in a first direction, which first direction is the connection direction of at least two laser centers of a group of laser groups.

First claim

What is claimed is:

1. A light source system, including at least one laser light source, the laser light source comprising:
two laser groups, at least one of the laser groups including at least two lasers, wherein light beams generated by each laser group are in the same direction and parallel to each other;
two reflector groups corresponding to the two laser groups, at least one of the reflector groups including at least two reflectors, each reflector being disposed on an optical axis of the corresponding laser; each reflector group reflecting the light beams generated by the corresponding laser group, wherein a spacing between light beams output from the reflector group is smaller than a spacing between the light beams inputted to the reflector group;
wherein the light beams generated by the two laser groups are parallel to each other, and the light beams output from the two reflector groups are in the same direction and parallel to each other;
wherein first projections of the two laser groups on a plane parallel to their respective light beam cross-sections are offset from each other and partially overlap with each other when projected in a first direction as second projections, the first direction being along a line connecting centers of the at least two lasers in the at least one laser group.

2. The light source system of claim 1 , wherein two adjacent reflects in the at least one reflector group that includes at least two reflectors are disposed in a step arrangement.

3. The light source system of claim 2 , wherein projections of the two adjacent reflectors in their respective light output directions are in contact with each other.

4. The light source system of claim 3 , wherein a width of a cross-sectional light spot of the output light beams of the lasers is equal to a projected size of the reflectors in their light incident direction, wherein adjacent light spots, formed by adjacent light beams from the same laser group and after reflection by the reflector, are in contact with each other in a width direction, wherein the width is a width of the light spot when projected in the second direction, the second direction being parallel to both a cross-section of the incident light onto the reflectors and a cross-section of the output light from the reflector.

5. The light source system of claim 4 , wherein the cross-sectional light spot has an elliptical, rectangular or round shape.

6. The light source system of claim 4 ,
wherein an incident angle of the incident light onto the reflector is 45 degrees, and
wherein a width of the cross-sectional light spot of the incident light is equal to a length of a side of the reflector that reflect the incident light, and wherein the adjacent light spots, formed by the adjacent light beams and after reflection by the reflector, are in contact with each other in their width direction.

7. The light source system of claim 1 , wherein light spots formed by adjacent light beams from the lasers of different laser groups and after reflection by the reflector are in contact with each other in a second direction, the second direction being parallel to both a cross-section of an incident light of the reflector and a cross-section of an output light of the reflector.

8. The light source system of claim 1 , wherein each laser group is arranged linearly, and the two laser groups are disposed in a same direction and in an offset manner.

9. The light source system of claim 8 , wherein two lines that the two laser groups are located respectively on are in a same sectional plane in an output light direction of the lasers, wherein adjacent lasers in one of the two laser groups are spaced from each other, wherein adjacent lasers in another one of the two laser groups are spaced from each other, and wherein the two laser groups are disposed on their respective lines in an offset and interleaved manner.

10. The light source system of claim 8 , wherein two lines that the two laser groups are located respectively on are in different sectional planes in an output light direction of the lasers, wherein adjacent lasers in one of the two laser groups are spaced from each other, wherein adjacent lasers in another one of the two laser groups are spaced from each other, and wherein projections of the two laser groups in their respective output direction are located on their respective lines in an offset and interleaved manner.

11. The light source system of claim 1 , wherein light beams from the two laser groups are in opposite directions.

12. The light source system of claim 11 , wherein each laser group is arranged linearly, wherein the two laser groups face against each other, and wherein projections of the two laser groups in their respective output direction partially overlap with each other.

13. The light source system of claim 12 , wherein light spots, formed by light beams generated by one of the two laser groups and adjacent light beams generated by the other one of the two laser groups and after reflection by the reflector, are in contact with each other in a second direction, the second direction being parallel to both a cross-section of an incident light of the reflector and a cross-section of an output light of the reflector.

14. The light source system of claim 1 , wherein the light source system includes two laser light sources;
the light source system further including a light combining device, wherein light beams from the two laser light sources are input on two sides of the light combining device, wherein the light combining device respectively transmits and reflects light beams incident on its two sides, and wherein light spots formed by the transmitted and reflected light beams partially overlap with each other.

15. The light source system of claim 14 , wherein the light spots formed by the transmitted and reflected light beams overlap in their center areas.

16. The light source system of claim 14 , further comprising a reflector for reflecting output light of one of the laser light sources to one side of the light combining device.

17. The light source system of claim 16 , wherein the light combining device reflects the light reflected by the reflector onto the light combining device.

18. The light source system of claim 16 , wherein a position of the reflector is adjustable, such that an incident angle of incident light onto the reflector is adjustable.

19. The light source system of claim 14 , wherein the light beams from the two laser light sources have polarization angles that are perpendicular to each other, and wherein the light combining device is a polarization-based light combining device.

20. The light source system of claim 14 , wherein the light beams from the two laser light sources have different wavelengths, and wherein the light combining device is a wavelength selection device.

21. The light source system of claim 1 , wherein the lasers are laser diodes.

22. A laser light source comprising:
two laser groups, at least one of the laser groups including at least two lasers, wherein light beams from each of the two laser groups are in the same direction and parallel to each other, and wherein the light beams from the two laser groups are in opposite directions and parallel to each other;
two reflector groups for respectively reflecting the light beams generated by the two laser groups, wherein reflected light of the two laser groups after reflection by the reflectors are in the same direction and parallel to each other;
wherein first p

Assignees

• Hu Fei
• Yang Jiayi
• Appotronics Corp Ltd

Inventors

• Hu Fei
• Yang Jiayi

Classifications

• H01S5/4012

  Beam combining, e.g. by the use of fibres, gratings, polarisers, prisms · CPC title

• H01S5/00

  Semiconductor lasers (superluminescent diodes H10H20/00) · CPC title

• G02B27/10

  Beam splitting or combining systems (polarising systems G02B27/28; mixing and splitting light signals using optical waveguides G02B6/28; {beam shaping, e.g. changing the cross-sectional area, by dividing or superposing multiple light beams G02B27/0905}) · CPC title

• G02B27/0916

  Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers (coupling into light guides using intermediate optical elements G02B6/4204; details of lighting devices in general F21V) · CPC title

• G02B27/09 Primary

  Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for {(adapting the beam shape of a laser diode G02B19/0052; adapting the beam shape of an LED G02B19/0061; coupling into light guides using intermediate optical elements G02B6/4204; beam shaping specially adapted for lasers H01S3/005)} · CPC title