Daniel Bublitz,Günter Rudolph,Martin Hacker,Tobias Bühren,Roland Bergner,Burkhard Wagner,Rico Fuchs
申请号：
US14119367
公开号：
US20140078468A1
申请日:
2012.05.22
申请国别(地区):
US
年份:
2014
代理人:
摘要：
A system for determining the surface shape of the cornea of an eye by analyzing the reflection of a spatially distributed ring pattern. The system includes an element for generating a ring pattern, an illuminating unit, an image capturing unit, and a control and analyzing unit. The element for generating rings is a fresneled axicon with annular structures of different radii. Furthermore, an optical element for illuminating the entire surface of the fresneled axicon with plane waves and an optical element for separating the illuminating and detecting beam path are arranged between the illuminating unit and the fresneled axicon. Furthermore, the image capturing unit consisting of an imaging system and an image sensor is designed for a telecentric distance-independent image detection.
