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Proceedings Paper

Optical methods for measurements of surface shape in optical components for high power laser beam forming
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Paper Abstract

The paper presents modifications of full-field optical methods commonly used to test the surface quality of optical components used for forming a high power laser beam and tests of a final wavefront. The modifications in reference to surface measurements rely on implementation of the novel fringe pattern processing methods including the quality improvement of initial interferogram and analysis of a reconstructed phase based on Hilbert-Huang transform aided by the principal component analysis. Also the Point Diffraction Interferometer as the efficient tool for high quality measurements of elements with high NA is introduced. In reference to a wavefront quality measurements two solutions are discussed: the use of a lateral shear interferometer and the system employing Transport of Intensity Equation method. The pros and cons for both methods are discussed.

Paper Details

Date Published: 8 December 2016
PDF: 7 pages
Proc. SPIE 10159, Laser Technology 2016: Progress and Applications of Lasers, 1015915 (8 December 2016); doi: 10.1117/12.2263537
Show Author Affiliations
Michał Józwik, Warsaw Univ. of Technology (Poland)
Maciej Trusiak, Warsaw Univ. of Technology (Poland)
Kamil Liżewski, Warsaw Univ. of Technology (Poland)
Juan Martínez-Carranza, Warsaw Univ. of Technology (Poland)
Nikolay Voznesenskiy, Difrotec OÜ (Estonia)
Małgorzata Kujawińska, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10159:
Laser Technology 2016: Progress and Applications of Lasers
Ryszard S. Romaniuk; Krzysztof Kopczynski; Jan K. Jabczyński; Zygmunt Mierczyk, Editor(s)

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