Electric heating – Metal heating – By arc
Reexamination Certificate
2006-01-24
2006-01-24
Evans, Geoffrey S. (Department: 1725)
Electric heating
Metal heating
By arc
Reexamination Certificate
active
06989508
ABSTRACT:
A precision, laser-based method and system for high-speed, sequential processing of material of targets within a field are disclosed that control the irradiation distribution pattern of imaged spots. For each spot, a laser beam is incident on a first anamorphic optical device and a second anamorphic optical device so that the beam is controllably modified into an elliptical irradiance pattern. The modified beam is propagated through a scanning optical system with an objective lens to image a controlled elliptical spot on the target. In one embodiment, the relative orientations of the devices along an optical axis are controlled to modify the beam irradiance pattern to obtain an elliptical shape while the absolute orientation of the devices controls the orientation of the elliptical spot.
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Link Cutting/Making, Handbook of Laser Materials Processing, Chapter 19, pp. 595-615, ISBN 0-912035-15-3.
Cordingley James J.
Ehrmann Jonathan S.
Smart Donald V.
Svetkoff Donald J.
Brooks & Kushman P.C.
Evans Geoffrey S.
GSI Group Corporation
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