System for directing a laser beam toward an active area
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United States of America Patent
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Jul 18, 2000
Grant Date -
N/A
app pub date -
May 11, 1998
filing date -
May 11, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
A device and method for aligning the focal point of a laser beam into coincidence with the active area of a detector includes an optical element for focusing the laser beam to the focal point at a location on the surface of the detector. Also included is a selectively activated light source and a camera which establishes a reference location for the active area within an x-y grid coordinate system whenever the surface of the detector is illuminated by the light source. Further, by using the light that is reflected from the focal point location through a beam splitter, the camera also establishes the location of the laser beam focal point in the same coordinate system. The optical element is then adjusted to move the focal point in the x and y directions, as required, to thereby bring the focal point location into coincidence with the active area.
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