Interferometric optical apparatus and method using wavefront division
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United States of America Patent
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Dec 18, 2007
Grant Date -
Mar 2, 2006
app pub date -
Aug 22, 2005
filing date -
Aug 30, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system and method of optical reflectometry and optical coherence tomography (OCT) is provided by using a wavefront-division interferometer where a beam is split into side-by-side beam portions. The interference is tuned by changing the phase difference between the beam portions. The interference contrast is adjusted by changing the ratio of the beam portions. The structure of the optical reflectometry and OCT is compact and insensitive to environmental changes. Methods are also provided for multi-level and multi-layer optical data storage systems.
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