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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 22, Iss. 18 — Sep. 15, 1997
  • pp: 1373–1375

Lossless light projection

J. Glückstad, L. Lading, H. Toyoda, and T. Hara  »View Author Affiliations


Optics Letters, Vol. 22, Issue 18, pp. 1373-1375 (1997)
http://dx.doi.org/10.1364/OL.22.001373


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Abstract

A new technique for energy-preserving phase-only light projection is demonstrated. The phase-only encoding is based on an extension of the Zernike phase-contrast method into the domain of full-range [0; 2π ] phase modulation, breaking the usual small-phase-angle limitation. Controlling the spatial average value of the input-phase pattern and choosing appropriate phase retardation at the phase-contrast filter yield pure-phase-based image formation. Experimental results demonstrate close to 90% energy efficiency. Output intensity levels with magnitudes more than 3.5times that of the input intensity level were measured in the brightest regions of the projected images.

© 1997 Optical Society of America

Citation
J. Glückstad, L. Lading, H. Toyoda, and T. Hara, "Lossless light projection," Opt. Lett. 22, 1373-1375 (1997)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-22-18-1373

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