Patent ID: 7084986
Filing Date: 2006-08-01
Classification: A61B,G01B

Abstract:
1. A system for contactless measurement of the optical imaging quality of an eye comprising: a light source; an interferometer by which at least one light pulse with a short coherence length is coupled into the eye from said light source; a detector; the optical path length of at least one arm of the interferometer being varied for measuring the length (L) of the eye until a typical interference pattern between a reflection of the cornea and a reflection of the retina of the eye occurs in said detector; said interference pattern together with a known path segment of the variation (Δs) of the optical path length allowing conclusions to be made about the length (L) of the eye; and the variation (Δs) of the optical path length is determined by introducing at least one partially optically transparent elements and at least one element of the interferometer which is movable in a defined manner in the at least one arm of the interferometer.