APPARATUS FOR GENERATING IMPROVED LASER BEAM

摘要

A selective reflector (10), for selectively preventing reflection of light passing therethrough. The selective reflector (10) comprising at least one layer characterized by an angle-dependent reflectivity function. The angle-dependent reflectivity function being decreasing upon at least one interval of increasing impinging angle of the light on a surface of the at least one layer, such that when said impinging angle is within a predetermined range, the reflection of light is substantially prevented.