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Optical Engineering

New coding technique to obtain multilevel computer-generated holograms in one step
Author(s): Guylain Lemelin; Roger A. Lessard
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Paper Abstract

We used a binary coding scheme based on optical density inside a basic cell to produce a smooth multilevel phase pattern on a photoresist film. This technique, which is as simple as a contact copy, is very easy to control for our type of computer-generated holograms. Preliminary results show that a good blazed profile can be obtained with minimum equipment at low cost. Specialized transmission holograms produced with this technique showed a 40% diffraction efficiency and good quality for 632.8-nm radiation.

Paper Details

Date Published: 1 September 1993
PDF: 6 pages
Opt. Eng. 32(9) doi: 10.1117/12.145065
Published in: Optical Engineering Volume 32, Issue 9
Show Author Affiliations
Guylain Lemelin, Univ. Laval (Canada)
Roger A. Lessard, Univ. Laval (Canada)

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