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9
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vol 64 / September, 2021
Article

DOI 10.17586/0021-3454-2016-59-2-143-149

UDC 535.317.2

MEASURING THE WAVE ABERRATION IN OPTICAL SYSTEMS BY THE DIGITAL SHADOW METHOD

M. E. Zatsepina
ITMO University; student


V. K. Kirillovsky
State Educational Establishment of High Professional Education “Saint-Petersburg State University of Information Technologies, Mechanics and Optics”; Professor


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Abstract. A digital method for quantitative control of wave aberrations in optical systems is proposed. The approach is based on the method of izophotometry and involves transformation of a pair of shadow images into geometric models of shadowgrams of a linear grating using transformation function (including the “wedge” function), and the further processing of the models with specially designed software. The analyzed optical system quality is assessed; wavefront deformation map and characteristics of the system image quality are presented.
Keywords: geometric model of a linear grating shadowgram, wavefront deformations, izophotometry, Foucault knife-edge, shadow method

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