LASER DISPERSED SPOT OPTICAL PATH, TWO-COLOR LASER LIGHT SOURCE AND THREE COLOR LASER LIGHT SOURCE

摘要

A laser dispersed spot optical path. A first conical lens (3, 23), a diffusing member (4, 24) and a second conical lens (5, 25) are sequentially provided in a laser output optical path, thereby enabling homogenization and shaping of a Gaussian laser beam, and combined with a diffusing effect of the diffusing member (4, 24), a variety of laser beam divergence angles are formed, then the diverged laser beams are collected using a second conical lens (5, 25) so as to finally form an even distribution of beams having an optical axis near 0 degrees and a diversity of divergence angles. By using a diversity of beam divergence angles, the invention can reduce laser space coherence; moreover, the even distribution at 0 degrees and diversity of diverging angles can prevent optical loss upon entering an optical collecting member resulting from an excessively high energy ratio of a beam diverging with a large angle, thereby increasing laser light source brightness. The laser dispersed spot optical path can increase the brightness of both a laser dispersed spot and laser light source. The invention is applicable to the technical field of laser display.