Process and apparatus for measuring density fluctuations occurring with pulsed irradiation of a material
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United States of America Patent
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Dec 30, 2003
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N/A
app pub date -
Jul 12, 2000
filing date -
Jul 12, 1999
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Abstract
A process and an apparatus preferably used during the photocagulation of the fundus of human eyes or animals measures density fluctuations caused by pulsed irradiation, such as a laser irradiation source, on a material. A wherein a measuring signal is acoustically or optically detected. The change of the intensity and/or of the time slope of the measuring signal resulting from the irradiation of a specific material point is detected. A linear thermo-elastic signal fraction is removed from the measuring signal.
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