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CN-116819787-B - Laser light source and laser light source system

CN116819787BCN 116819787 BCN116819787 BCN 116819787BCN-116819787-B

Abstract

The invention discloses a laser light source which comprises a laser device, wherein the laser device comprises at least one laser device and a light homogenizing rod, wherein the laser device is used for generating at least one light beam with different divergence angles along a first direction and a second direction, the light homogenizing rod comprises a light inlet end face and a light outlet end face, the light inlet end face and the light outlet end face are square, the light inlet end face receives the at least one light beam with different divergence angles along the first direction and the second direction, the light outlet end face outputs the light beam subjected to light homogenizing, and one diagonal line of the light inlet end face is parallel to the first direction or the second direction. So that the intensity and color distribution of the emergent light beam on the fluorescent light source surface are homogenized, and the required homogenizing rod has small size, thereby achieving the effects of low loss and low cost.

Inventors

  • CHEN BIN
  • CHEN XINGJIA

Assignees

  • 深圳市中光工业技术研究院

Dates

Publication Date
20260505
Application Date
20190829

Claims (12)

  1. 1. A laser light source, comprising: a laser device, including at least one laser, for generating at least one light beam with different divergence angles along a first direction and along a second direction; The light homogenizing rod comprises a light incident end face and a light emergent end face, wherein the light incident end face and the light emergent end face are square, the light incident end face receives at least one light beam with different divergence angles along a first direction and a second direction, the light emergent end face outputs a light beam subjected to light homogenizing, and a diagonal line of the light incident end face is parallel to the first direction or the second direction; The laser device comprises a plurality of lasers, wherein each laser respectively generates light beams with different divergence angles along a first direction and a second direction; and the first direction is perpendicular to the second direction.
  2. 2. The laser light source of claim 1, further comprising a lens disposed between the laser and the light rod for focusing at least one light beam generated by the laser device at the light entrance end surface of the light rod with different divergence angles along the first direction and along the second direction.
  3. 3. The laser light source of claim 1, wherein the light homogenizing rod is an optical fiber and comprises a square rod core and a wrapping layer wrapping the square rod core, and the square rod core comprises a light inlet end face and a light outlet end face.
  4. 4. A laser light source as claimed in claim 3, wherein the optical fiber further comprises a coating layer surrounding the cladding layer.
  5. 5. The laser light source according to claim 1, wherein the light homogenizing rod has a square shape, and an area of an incident end face of the light homogenizing rod is equal to an area of the emergent end face, or The light homogenizing rod is conical, and the area of the light incident end face of the light homogenizing rod is larger than the area of the light emergent end face, or the area of the light emergent end face of the light homogenizing rod is larger than the area of the light incident end face.
  6. 6. The laser light source of claim 1, wherein the light bar is hollow, and a square hole is formed along the light entrance end surface of the light bar and penetrates through the light bar until the light exit end surface, and the square hole and the light bar have the same central line.
  7. 7. The laser light source of claim 1, wherein the fast axes of the light beams generated by the plurality of lasers are all parallel to the first direction.
  8. 8. The laser light source of claim 1, wherein the fast axis of the beams generated by some of the plurality of lasers is parallel to the first direction and the fast axis of the beams generated by the remaining lasers is perpendicular to the first direction.
  9. 9. The laser light source of claim 1, wherein the plurality of lasers are arranged in an array along a first direction and along a second direction, the number and/or spacing of the lasers arranged along the first direction being different from the number and/or spacing of the lasers arranged along the second direction.
  10. 10. A laser light source system comprising the laser light source according to any one of claims 1 to 9 and a wavelength conversion device that outputs a dodging light beam to the wavelength conversion device, the wavelength conversion device receiving the dodging light beam and generating stimulated luminescence different from a wavelength range of the dodging light beam.
  11. 11. The laser light source system of claim 10, further comprising a lens and a light collection assembly; the lens is used for converging the uniform light beams output by the laser light source; the wavelength conversion device is used for receiving the converged uniform light beam from the lens to generate a fluorescent light beam, and The light collecting component is used for receiving the fluorescent light beam from the wavelength conversion device and outputting the fluorescent light beam after reflection.
  12. 12. The laser light source system according to claim 10, wherein the wavelength conversion device is a transmissive wavelength conversion device, and the wavelength conversion device is disposed on the light emitting end face of the light rod.

Description

Laser light source and laser light source system The application relates to a divisional application of 'laser light source and laser light source system' with the application number 201910807941.9, the application date of 2019, and the application date of 08 and 29. Technical Field The invention relates to the field of light sources, in particular to a laser light source and a laser light source system. Background The laser has the advantages of small chip, high brightness, concentrated emitting direction, high power, good quality of laser beam and the like, and when the laser irradiates the wavelength conversion device, an illumination light source with small light spot and high brightness can be obtained. However, since the light beam emitted by the laser is gaussian, the power density of the center is very high, and when the light beam is incident on the wavelength conversion element, the local heat is very high in the center, so that the overall brightness of the light is limited, the conversion efficiency of the laser fluorescence is reduced, and in addition, the light intensity and the color are not uniform on the fluorescent light source surface. Therefore, in order to obtain a light source with high brightness, high efficiency and uniform light beam intensity and color, the laser beam is generally subjected to light homogenizing treatment and then enters and irradiates the wavelength conversion element to be converted into a fluorescent light source, and the conventional light homogenizing mode mostly adopts a square rod or a compound eye and is arranged beside a laser, so that the laser beam is converged on the light incident end surface of the square rod or the compound eye, and then the light is emitted on the light emitting end surface to obtain uniform light beams. However, when the square bar is adopted for homogenizing light, the more the light beam is reflected, the more uniform the light beam is, the longer the length of the square bar is needed, and the defects of large light loss, high cost, large product size and the like caused by the fact that the square bar is too long are overcome. Disclosure of Invention The invention mainly solves the technical problems of providing a laser light source and a laser light source system so as to homogenize the intensity and color distribution of an emergent light beam on a fluorescent light source surface, and the required light homogenizing rod has small size, thereby achieving the effects of low loss and low cost. In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a laser light source comprising: a laser device, including at least one laser, for generating at least one light beam with different divergence angles along a first direction and along a second direction; The light homogenizing rod comprises a light incident end face and a light emergent end face, wherein the light incident end face and the light emergent end face are square, the light incident end face receives at least one light beam with different divergence angles along a first direction and a second direction, the light emergent end face outputs a light beam subjected to light homogenizing, and a diagonal line of the light incident end face is parallel to the first direction or the second direction; The laser device comprises a plurality of lasers, wherein each laser respectively generates light beams with different divergence angles along a first direction and a second direction; and the first direction is perpendicular to the second direction. In order to solve the technical problems, the invention adopts another technical scheme that: The laser light source outputs a uniform light beam to the wavelength conversion device, and the wavelength conversion device receives the uniform light beam and generates stimulated luminescence with a wavelength range different from that of the uniform light beam. The invention has the beneficial effects that compared with the prior art, the invention shortens the length of the light homogenizing rod and homogenizes the emergent light beam by arranging the diagonal line of the light homogenizing rod and the first direction or the second direction of the emergent light beam of the laser in a parallel mode, thereby realizing low loss and low cost. Drawings FIGS. 1 a-1 c are schematic diagrams of structures in which the fast and slow axes of laser beams are parallel to the edges of a light homogenizing rod; FIGS. 2 a-2 b are schematic diagrams of the structures of the laser beam fast and slow axes and the diagonal lines of the dodging rods; FIG. 3 is a schematic view of the structure of a laser light source of the present invention; FIG. 4a is a schematic view of a first embodiment of a light homogenizing rod of the laser light source of the present invention; FIGS. 4b and 4c are schematic structural views of a second embodiment of a light homogenizing rod in the laser light source of the present