Interferometer arrangement with adjustable optical path length difference for detecting a distance between different layers of an eye
AssigneeCarl Zeiss Jena GmbH
InventorsAndreas Dorsel, Karl-Heinz Donnerhacke, Beate Moeller, Guenter Maschke
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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.
Claims10
In an interferometer arrangement with adjustable optical path length difference for detecting a distance between different layers of the eye by means of a short-coherent light source, with a displaceable or adjustable optical path length difference in at least one interferometer arm and a first photoelectric receiver for detecting the interference signals generated by the interferometer, wherein an incremental transmitter is coupled with means for changing the optical path length difference and generates a reference signal which changes its frequency like that of the interference signal depending on the rate of change of the optical path length difference.
Dependencies are inferred from the claim text.