Patent ID: 6013911
Filing Date: 2000-01-11
Classification: G01J,G03F

Abstract:
A system for automatically and quickly adjusting the luminance and luminance distribution of a light source on the surface of an object, comprising:lighting means having a longitudinal axis, a first and a second axis, said lighting means projecting light on the surface and being capable of moving along said longitudinal, first and second axes,first control means connected to said lighting means for moving said lighting means in said first direction,second control means connected to said lighting means for moving said lighting means in said second lateral direction,third control means connected to said lighting means for moving said lighting means along its longitudinal axis;driver means for selectively powering either one or more of said first, second and third control means concurrently in response to control signals so as to change the position and intensity of said lighting means;means for receiving said light comprising means for scanning the surface and producing a signal which corresponds to the luminance of the scanned surface image;means to detect the luminance distribution of said light on the surface;means to analyze, capture and store individual optical signals connected to said receiving means, whereby said analyzing means measures and stores the value of the luminance and the luminance distribution on the surface;error correction means for modifying the stored values to correct for system errors,means for generating said control signals in response to the corrected values, whereby said control signals activate said first, second and third control means repeatedly as needed to adjust the position of said lighting means until optimal brightness and luminance distribution across the surface is achieved.