Laser Projection System with Potassium Gadolinium Tungstate

摘要

An apparatus and method for enhancing light using stimulated Raman scattering in a potassium gadolinium tungstate (KGW) crystal. The stimulated Raman scattering is utilized to add wavelength diversity for reduced speckle and to change the color of the light to a more desirable combination of wavelengths. Digital projection is one application that may benefit from lower speckle and shifted color. Color-based stereoscopic projection is enabled by the addition of stimulated Raman bands at specific wavelengths.

主权项

1. An optical apparatus comprising:
a potassium gadolinium tungstate (KGW) crystal; a green laser; and a digital projector; wherein the green laser illuminates the KGW crystal; a stimulated Raman scattering in the KGW crystal enhances an aspect of a light output from the KGW crystal; and the light output of the KGW crystal illuminates the digital projector.