Coherent light generators – Particular resonant cavity – Folded cavity
Patent
1992-07-13
1994-08-30
Scott, Jr., Leon
Coherent light generators
Particular resonant cavity
Folded cavity
392700, 392108, H01S 308
Patent
active
053434897
ABSTRACT:
The invention is directed to an arrangement for shaping a laser beam and for reducing the coherence thereof. The arrangement has at least two approximately parallel mirrors arranged approximately perpendicular to the laser beam. One of the mirrors is fully reflective whereas the other mirror is partially reflective so that the exiting light beam comprises several mutually adjacent or partially overlapping component beams which are reflected a different number of times. The spacing of the mirrors is greater than half the coherence length of the laser. An advantageous embodiment provides the arrangement on a plane-parallel glass plate with the degree of reflection of the partially-reflective mirror being reduced in a stepwise manner and with a partial overlapping of the exiting component beams.
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patent: 5005969 (1991-04-01), Kataoka
Carl-Zeiss-Stiftung
Jr. Leon Scott
Ottesen Walter
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