Kinoform apodization by using of programmable diffractive optical elements
2004 (English)In: Proceedings of SPIE - The International Society for Optical Engineering: Volume 5456, 2004 / [ed] Frank Wyrowski, SPIE - International Society for Optical Engineering, 2004, 153-156 p.Conference paper (Refereed)
The apodizationof diffractiveopticalelementscan be realized by a local change of their diffraction efficiency. In the case of lithographic elementswith step-like structure of the period, the variable diffraction efficiency can be achieved by a gradual transformation of the 2m stepkinoform into its conjugate counterpart across theapodization region. In the present contribution we show experimental results confirming this idea, which until no was verified only by simulations. The apodized quaternary grating with locally varying diffraction efficiency was obtained on a SLM device as aprogrammablediffractiveopticalelement by changing gradually the period's profile. Knowledge of the phase heights of the SLM's pixels is required for successful implementation of theapodization 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.
Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2004. 153-156 p.
, SPIE Proceedings, 5456
Telecommunications Atom and Molecular Physics and Optics
IdentifiersURN: urn:nbn:se:kth:diva-82156DOI: 10.1117/12.566071ISI: 000224432600017ScopusID: 2-s2.0-12344292673ISBN: 9780819453839OAI: oai:DiVA.org:kth-82156DiVA: diva2:497992
Photon Management; Strasbourg; 27 April 2004 through 28 April 2004
QC 201202192012-02-112012-02-112012-02-19Bibliographically approved