Laser light source

Abstract

The invention relates to a laser light source which comprises a blue laser light source assembly used for generating parallel linear polarization blue laser, a dichroic polarizing beam splitter, a quarter-wave plate, a reflecting piece and a wavelength converter, wherein an angle theta is formed between the polarization direction of the blue laser and the Y axis of an XOY plane; the blue laser is respectively reflected and transmitted by the dichroic polarizing beam splitter to form reflected blue light and transmitted blue light, and the reflected blue light is converged on the wavelength converter to generate excited yellow light; the transmitted blue light is subjected to wavelength conversion by the quarter-wave plate and then is reflected by the reflecting piece to pass through the quarter-wave plate again to be subjected to secondary wavelength conversion to form S polarized blue light, and the S polarized blue light and the excited yellow light are mixed to generate output white light; and the angle theta is set based on a preset light energy ratio of the S polarized blue light to the excited yellow light. The requirements of stable color temperature, simple and convenient manufacturing and energy loss reduction can be met at the same time.

Description

technical field [0001] The present invention relates to the field of laser light sources, and more particularly, to a laser light source. Background technique [0002] Laser has the characteristics of concentrated energy and good collimation, which makes laser as a new type of light source widely used in various lighting fields, such as laser projection, stage lighting, etc. The application of laser light source in the field of lighting is often not simple monochromatic light illumination but multi-color light mixing. [0003] figure 1 A laser light source of the prior art is shown. The blue laser light 101 emitted by the laser 1 becomes blue light 201 after passing through the half-wave plate 2 . The blue light 201 is divided into S-polarized blue light 301 and P-polarized blue light 401 after passing through the dichroic polarization beam splitter 3 . The dichroic polarizing beam splitter 3 totally reflects the S-polarized blue light 301, totally transmits the P-polari...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a laser light source that can reduce energy loss and has a simple structural design for the existing laser light sources that are prone to color temperature fluctuations, complex structures, high design costs, and energy loss. Laser light source with stable color temperature

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