Method for changing the cross section of a laser beam

Optical: systems and elements – Mirror – With mirror surface of varied radius

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359846, 359868, 372 99, G02B 508

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active

054734754

ABSTRACT:
A technique is disclosed herein in which a circular optical beam, for example a copper vapor laser (CVL) beam, is converted to a beam having a profile other than circular, e.g. square or triangular. This is accomplished by utilizing a single optical mirror having a reflecting surface designed in accordance with a specifically derived formula in order to make the necessary transformation, without any substantial light loss and without changing substantially the intensity profile of the circular beam which has a substantially uniform intensity profile. In this way, the output beam can be readily directed into the dye cell of a dye laser.

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Carl C. Ajeksoff, et al. "Holographic Conversion of a Gaussian Beam to a Near-Field Uniform Beam" Optical Engineering, May 1991, vol. 30 No. 5, pp. 537-540.
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