Patent ID: 6099125
Filing Date: 2000-08-08
Classification: A61B

Abstract:
A refractometer for determining the optimal wavefront at a measurement plane, said refractometer comprisinga first spatial light pattern generator disposed at a first plane, said first plane being optically conjugate to said measurement plane,a second spatial light pattern generator coaxial with said first spatial light pattern generator, said second spatial light pattern generator disposed at a second plane optically conjugate to a detector plane,control means coupled to said first and second spatial light pattern generators for operating said refractometer ina measurement interval during which a measurement pattern is projected through a selected measurement site on said measurement plane and onto a measurement pattern position on said detector plane, anda reference interval during which a reference pattern is projected through a selected reference site on said measurement plane and onto a reference pattern position on said detector plane, anddetector means in optical communication with said detector plane, said detector means providing an estimate of said measurement pattern position and said reference pattern position,automated alignment means in communication with said detector means for controlling an angle at which said measurement pattern is projected through said selected measurement site during said measurement interval, said angle being selected by said automatic alignment means on the basis of said estimate of said reference pattern position and said measurement pattern position.