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Coherence and polarization effects of light diffraction by microlens arrays
Author(s): N. I. Petrov
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Paper Abstract

Influence of incident light beam coherence on the uniformity in the intensity distribution of diffracted beam by microlens array is investigated. Optical efficiency is calculated for different polarizations. It is shown that the intensity profile and radiation pattern of LED source beam diffracted by periodic micro-lens array are highly uniform and insensitive to the wavelength of incident beam. The spreading angle and output efficiency of the diffracted beam is more sensitive to the aspect ratio of microlens array (MLA). The bigger aspect ratio the higher spreading angle and lower the output efficiency. For a given spreading angle the aspect ratio can be decreased substantially if high-index material is used. Significant influence of wave-front curvature and polarization of incident beam on the reflectance and transmittance is shown.

Paper Details

Date Published: 24 June 2019
PDF: 9 pages
Proc. SPIE 11146, Optical Technologies for Telecommunications 2018, 111460J (24 June 2019); doi: 10.1117/12.2527262
Show Author Affiliations
N. I. Petrov, Scientific and Technological Ctr. of Unique Instrumentation RAS (Russian Federation)


Published in SPIE Proceedings Vol. 11146:
Optical Technologies for Telecommunications 2018
Vladimir A. Andreev; Anton V. Bourdine; Vladimir A. Burdin; Oleg G. Morozov; Albert H. Sultanov, Editor(s)

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