Patent · US Expired

Interferometer arrangement with adjustable optical path length difference for detecting a distance between different layers of an eye

US5719673A · kind A · utility

66Cited by

5References

10Claims

0Family size

Assignee

Carl Zeiss Jena GmbH · DE

Inventors

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

Key dates

Filing date	Feb 9, 1996
Grant date	Feb 17, 1998
Priority date	—
Expiry date	Feb 9, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01B9/02071
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

An interferometer arrangement has an adjustable optical path length difference in at least one interferometer arm and a photoelectric receiver for detecting the interference signals generated by the interferometer. An incremental grating transmitter is coupled to the arrangement with a device for changing the optical path length difference and for generating a reference signal which changes its frequency like that of the interference signal depending on the rate of change of the optical path difference.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.