IMPROVED EYE SURFACE TOPOGRAPHER

The invention concerns a system for determining the topography of a diffusely reflecting curved surface, that comprises two telecentric projection branches that project fringe images of a Ronchi grating on the diffusely reflecting curved surface, and a viewing branch of which the optical system proj...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BRASSÉ, Jan G. M, VELZEL, Christiaan H. F, KESSELS, Henricus M. M
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	DIAGNOSIS HUMAN NECESSITIES HYGIENE IDENTIFICATION MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEDICAL OR VETERINARY SCIENCE PHYSICS SURGERY TESTING
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Beschreibung
Zusammenfassung:	The invention concerns a system for determining the topography of a diffusely reflecting curved surface, that comprises two telecentric projection branches that project fringe images of a Ronchi grating on the diffusely reflecting curved surface, and a viewing branch of which the optical system projects an image of the illuminated surface on its camera target, and comprises further a computer that receives the fringe images recorded by the camera target and calculates from these the topography of the anterior eye surfaces, in which system the projection sources are semiconductor diodes and the optical system of the viewing branch is two-sided telecentric.