Folding laser mirror
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United States of America Patent
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-
Apr 28, 1981
Grant Date -
N/A
app pub date -
Jan 14, 1980
filing date -
Jan 14, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A laser mirror adapted to prevent astigmatism of reflected laser beams where the mirror is used for 'folding' the laser beam such that the incident laser beam direction is not normal to the reflective surface of the mirror. This is accomplished by the provision of slots of specified dimensions in the rear surface of the mirror that in use are disposed parallel to the major axis of the laser beam's image on the mirror. In this manner, the mirror is provided with two bending stiffnesses, one in the direction of the major axis that is greater than that in the direction of the minor axis such that the bending due to heating of the mirror in the direction of both axes is made at least substantially equal.
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