An apparatus and method for reducing speckle of a laser beam is disclosed. The apparatus includes a light guide, a highly reflective mirror at the input face of the light guide and a partially reflective mirror at the exit face of the light guide. A coherent laser beam is introduced into the light guide...http://www.google.com.tw/patents/US7379651?utm_source=gb-gplus-share專利 US7379651 - Method and apparatus for reducing laser speckle
