Detector apparatus for detecting coherent point-source radiation
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United States of America Patent
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Feb 7, 1995
Grant Date -
N/A
app pub date -
Dec 18, 1984
filing date -
Dec 23, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Detector apparatus includes a diffraction grating (11) having a period such that the incidence of coherent point-source radiation upon it produces a number of spaced self-images of the grating behind it. A Moire grating (12) is placed to coincide with one of these self-images and a detector array (13-16) is placed behind the Moire grating to detect the resulting interference fringes.
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