Patent ID: 6301284
Filing Date: 2001-10-09
Classification: G02B,G03F,H01S

Abstract:
A visible light alignment system for a line narrowed UV laser defining a UV output beam direction and having (i) a laser chamber containing a gain medium and (ii) a line narrowing module located outside said chamber, said module containing a prism beam expander including a first prism defining an illumination surface for receiving UV illumination from said chamber in a direction defining an angle with a normal to said illumination surface said alignment system comprising:A) a multi-axis alignment platform mounted on said line narrowing module;B) a visible light laser mounted on said multi-axis alignment platform;C) beam directing optics for directing a visible light laser beam from said visible light laser to reflect off the illuminating surface of said first prism and to pass through said gain medium in a direction collinear with the UV output beam direction.