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Proceedings Paper

Imaging properties of the light sword optical element
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Paper Abstract

The Light Sword Optical Element (LSOE) is a diffractive structure focusing light into a fragment of the optical axis. An interesting property of the LSOE is its ability for imaging with extended depth of field. Optical Transfer Function (OTF) and Point Spread Function (PSF) are usually applied for description of imaging arrangements. During our investigations several binary phase LSOE structures were fabricated. The structures differ each other with their modulation factor and apertures. A typical main focal length was equal to 74 mm in a case of coherent He-Ne laser illumination of LSOEs. Aperture diameter belonged to the range [2.8 mm, 5.5 mm], the modulation factor varied from 10% to 40% of the main focal length. Each structure was analyzed in the optical system as well as by computer simulation. PSFs of LSOE structures were measured in the optical system and were calculated numerically. Modulated Transfer Functions (MTFs) were calculated on the base of calculated and measured PSFs. Theoretical and experimental results were compared and discussed. Moreover, the experimental and numerical analysis of the Siemens star imaging was performed.

Paper Details

Date Published: 12 October 1994
PDF: 11 pages
Proc. SPIE 2169, Nonconventional Optical Imaging Elements, (12 October 1994); doi: 10.1117/12.190232
Show Author Affiliations
P. Zemlo, Warsaw Univ. of Technology (Poland)
Maciej Sypek, Warsaw Univ. of Technology (Poland)
Andrzej Kolodziejczyk, Warsaw Univ. of Technology (Poland)
Zbigniew Jaroszewicz, Central Lab. of Optics (Poland)

Published in SPIE Proceedings Vol. 2169:
Nonconventional Optical Imaging Elements
Jerzy Nowak; Marek Zajac, Editor(s)

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