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Proceedings Paper

Kinoform apodization by using of programmable diffractive optical elements
Author(s): Zbigniew Jaroszewicz; Grazyna Adamkiewicz; Vicente Duran-Bosch; Ari T. Friberg; Andrzej Kolodziejczyk; Andrzej Kowalik; Jesus Saez Lancis; Sergei Yu. Popov; Enrique Tajahuerce
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Paper Abstract

The apodization of diffractive optical elements can be realized by a local change of their diffraction efficiency. In the case of lithographic elements with step-like structure of the period, the variable diffraction efficiency can be achieved by a gradual transformation of the 2m step kinoform into its conjugate counterpart across the apodization region. In the present contribution we show experimental results confirming this idea, which until now was verified only by simulations. The apodized quaternary grating with locally varying diffraction efficiency was obtained on a SLM device as a programmable diffractive optical element by changing gradually the period's profile. Knowledge of the phase heights of the SLM's pixels is required for successful implementation of the apodization function. It was determined from Fresnel images of the binary phase gratings with different phase step height programmed on the SLM. The Fresnel images become then binary and their visibility depends on the phase height of the grating in a known way, what makes possible to calibrate the SLM.

Paper Details

Date Published: 1 September 2004
PDF: 4 pages
Proc. SPIE 5456, Photon Management, (1 September 2004); doi: 10.1117/12.566071
Show Author Affiliations
Zbigniew Jaroszewicz, Institute of Applied Optics (Poland)
Grazyna Adamkiewicz, Institute of Electronic Materials Technology (Poland)
Vicente Duran-Bosch, Univ. Jaume I (Spain)
Ari T. Friberg, Royal Institute of Technology (Sweden)
Andrzej Kolodziejczyk, Warsaw Univ. of Technology (Poland)
Andrzej Kowalik, Institute of Electronic Materials Technology (Poland)
Jesus Saez Lancis, Univ. Jaume I (Spain)
Sergei Yu. Popov, Royal Institute of Technology (Sweden)
Enrique Tajahuerce, Univ. Jaume I (Spain)

Published in SPIE Proceedings Vol. 5456:
Photon Management
Frank Wyrowski, Editor(s)

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