
Proceedings Paper
Diffractive, aspheric, or spherical beam transformers: a comparison in manufacturabilityFormat | Member Price | Non-Member Price |
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Paper Abstract
Near field beam shaping optics, also called beam transformers, remap an input Gaussian profile to a top-hat profile.
The top-hat profile is created at some working distance away from the shaping element where a corrector element is
placed to "flatten" the phase of the top-hat profile to allow it to propagate some finite distance as a "collimated" beam.
Creating a top-hat profile requires the surface of the shaping element to be highly aberrated resulting in designs that are
typically either a diffractive surface or an aspheric surface each composed of many higher-order aspheric coefficients.
Diffractives and higher-order refractive designs offer several challenges and limitations in manufacturing. The design
space of using all spherical elements or even a combination of aspheric and spherical elements has not been completely
explored to see if there are any advantages of reducing the manufacturing tolerances or limitations for beam shaping
systems. This paper will explore the comparison of the number of elements required for diffractive, aspheric, and
spherical designs to meet the same beam shaping requirement and provide details related to the manufacturability of
each type of design.
Paper Details
Date Published: 12 September 2008
PDF: 7 pages
Proc. SPIE 7062, Laser Beam Shaping IX, 70620L (12 September 2008); doi: 10.1117/12.796073
Published in SPIE Proceedings Vol. 7062:
Laser Beam Shaping IX
Andrew Forbes; Todd E. Lizotte, Editor(s)
PDF: 7 pages
Proc. SPIE 7062, Laser Beam Shaping IX, 70620L (12 September 2008); doi: 10.1117/12.796073
Show Author Affiliations
John G. Smith, MEMS Optical, Inc. (United States)
Andrew Stockham, MEMS Optical, Inc. (United States)
Published in SPIE Proceedings Vol. 7062:
Laser Beam Shaping IX
Andrew Forbes; Todd E. Lizotte, Editor(s)
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