An optical beam homogenizer divides and redirects an incident beam to provide uniform irradiation to a plane surface. The beam homogenizer is particularly useful in an apparatus and method for uniform laser irradiation of materials. The apparatus comprises a laser, a beam homogenizer, and a support for...http://www.google.ca/patents/US4475027?utm_source=gb-gplus-sharePatent US4475027 - Optical beam homogenizer
