Methods and apparatus for optical imaging
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United States of America Patent
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Feb 25, 2003
Grant Date -
Mar 21, 2002
app pub date -
Feb 8, 2001
filing date -
Oct 30, 1996
priority date (Note) -
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Abstract
Methods and apparatus directed to using modulation to substantially improve detection limits in optical imaging, and to substantially improve the performance of various optical imaging systems. In an illustrative embodiment, such modulation is achieved using a modulated light source, a modulation frequency reference, a detector, and a demodulator. The modulated light source may comprise a light source emitting an inherently modulated output; alternately, this modulated light source may comprise a separate optical modulator and a continuous wave, modulated, or pulsed light source configured so as to impose a modulation in the output of light source. Methods for imaging using such modulation are also disclosed.
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