Optical coherence tomography with dynamic coherent focus
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United States of America Patent
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May 2, 2000
Grant Date -
N/A
app pub date -
Mar 30, 1999
filing date -
Mar 30, 1998
priority date (Note) -
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Abstract
In coherence tomography, an interferometric measurement light beam scans the measurement object and is focused for improving the transverse resolution. In order to achieve a high transverse resolution over the entire object depth, the focal displacement and the change in path length in the measurement light beam for maintaining the coherence of the focus is achieved by one and the same moving optical element in the measurement light beam. The present invention achieves this by a particularly simple and easily adjustable arrangement which is characterized by especially low light loss in the measurement beam path.
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