Optical beam expander
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United States of America Patent
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-
Nov 12, 1996
Grant Date -
N/A
app pub date -
Oct 14, 1994
filing date -
Oct 16, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A beam expander suitable for use with laser machining apparatus comprises a convex paraboloidal surface 7 and a concave paraboloidal surface 8 formed from a single metal element 10. The expander has an optional zoom facility provided by a plane mirror 12, moveable along an input-output axis, for altering the position of an incident beam on the convex surface 7 thereby altering the magnification of the system.
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