System zur berührungslosen Vermessung der optischen Abbildungsqualität eines Auges

摘要

The invention relates to a system (1) which is used to measure the optical image quality of an eye (2) by means of an interferometer (3) in a contactless manner. At least one light impulse having a short coherence length is sent into the eye (2) from a light source (10) by means of said interferometer. The length of the optical path of at least one arm (17) of the interferometer (3) is varied in order to measure the length of the eye (2) until a typical interference model appears between a reflection of the cornea (4) and a reflection of the retina (6) of the eye in a detector (40). Said interference model, in conjunction with a known distance of the variation of the length of the optical path, enables the length of the eye (2) to be deduced. The length of the optical path is varied by introducing at least partially optically transparent elements (22), and by means of at least one definably moving element (19) of the interferometer (3) in respectively at least one of the light paths (17) of the interferometer (3).