Patent ID: 6222628
Filing Date: 2001-04-24
Classification: G01B

Abstract:
A surface characteristic measurement system for measuring a characteristic of a surface comprising:a processor;a light source adapted to provide a light beam on said surface in a manner that said light beam is diffused and reflected by said surface into a diffused light and a reflected light;a position sensing device adapted to sense a position and an intensity of said diffused light diffused by said surface, and to provide a position signal and a diffused light intensity signal to said processor indicative of said position and said intensity of said diffused light respectively; anda photodiode adapted to sense intensity of said reflected light reflected by said surface and to provide a reflected light intensity signal to said processor indicative of reflected light intensity;wherein said processor is adapted to determine said surface characteristic based on said position signal and said diffused light intensity signal received from said position sensing device, and said reflected light intensity signal received from said photodiode.