Patent ID: 7321468
Filing Date: 2008-01-22
Classification: G02B,G03F

Abstract:
1. A method for beam guiding of a light beam generated by a light source to a target location along a path distance L S , comprising splitting said light beam on said path distance L guiding said first partial beam additionally at least once along a delay line, said first partial beam thereby covering an additional path distance L guiding said second partial beam only along said path distance L combining said first and second partial beams after said first partial beam having passed through said delay line and guiding the combined beam to said target location, wherein said light beam is guided along said path distance L expanding said light beam between said light source and said target location at least once to a beam width B′>B and compressing said light beam again at least once in such a way that said light beam has said predetermined beam width B at said target location.