Interferometric arrangement with diffractive optical element for measuring intraocular distances

US5673096A · kind A · utility

Assignee

• Carl Zeiss Jena GmbH · DE

Inventors

• Andreas Dorsel · Menlo Park, US
• Karl-Heinz Donnerhacke · Jena, DE
• Beate Moeller · Jena, DE

Key dates

• Filing date: Dec 26, 1995
• Grant date: Sep 30, 1997
• Expiry date: Dec 26, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G01B11/14
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An arrangement for measuring intraocular distances between different optical boundary surfaces of the human eye by at least one interferometric measurement system is provided. The arrangement further comprises at least one diffractive optical element (DOE) for dividing the illumination beam path into partial beam paths for different boundary surfaces and/or for combination and mutual adaptation of the wavefronts of measurement light components proceeding from different boundary surfaces and/or for adaptation of the wavefronts of measurement light components proceeding from different boundary surfaces of the eye to the wavefront of the measurement light of at least one interferometric reference arm.