Patent ID: 6794636
Filing Date: 2004-09-21
Classification: G01D

Abstract:
Opto-electronic system for measuring dimensions comprising:at least one photo-emitter, at least one photo-detector, a linear transparent rule comprising at least one graduated portion provided with a plurality of opaque graduations and capable of being displaced relative to an optical system, said optical system capable of concentrating a light beam or beams generated by said photo-emitter on said graduated portion and concentrating the light beam having crossed said rule on said photo-detector, said photo-emitter and said photo-detector being on the same side of said rule, wherein an imaginary straight line from said photo-emitter to said photo-detector does not intersect said rule, said optical system being constituted of an integrated transparent optical bloc having integral optical surfaces that are capable of reflecting and concentrating or focalizing the light beam, and wherein the rule is located between at least two of the optical surfaces of the optical bloc.