Other
Scientific paper
Nov 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.5175..130b&link_type=abstract
Laser Beam Shaping IV. Edited by Dickey, Fred M.; Shealy, David L. Proceedings of the SPIE, Volume 5175, pp. 130-138 (2003).
Other
Scientific paper
An innovative multi-aperture beam integrator system producing a polygon pattern or other complex pattern on an image plane, which can be continuously varied in size, aspect ratio, or shape, is described in this paper. The multi-aperture function of the integrator system consists of three array elements, one stationary and the other two movable laterally. The first array element forms an array of Galilean telescopes which collect the light with 100% fill factor, segments the incoming beam into multiple beamlets, and reduces the diameter of each beamlet in order to prevent vignetting at the following movable arrays. The second and third array elements each contain a plurality of the anamorphic lenslets, not all the same, each lenslet pair of which forms one of the sides of the polygon or complex image. These array elements have a surface profile or phase function, which can be described as a general polynomial of the pupil coordinates. An aberration-free integrator lens overlaps the beamlets in the image plane to accomplish beam homogenization and produce a uniform intensity for all the sides of the polygon or segments of the complex image. Small lateral translations of the second and third array elements cause the image characteristics to change continuously.
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