Henricus M.M. Kessels,Jan G.M. Brassé,Christiaan H.F. Velzel
申请号：
US16071248
公开号：
US20200138286A1
申请日:
2017.01.20
申请国别(地区):
US
年份:
2020
代理人:
摘要：
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.
