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Appl Opt. 2002 Mar 1;41(7):1236-40.

Compact beam expander with linear gratings.

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  • 1Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel.


Novel compact beam expanders that could be useful for applications such as providing light to flat panel displays are presented. They are based on a planar configuration in which three spatially linear gratings are recorded on one transparent substrate, so as to expand a narrow incoming beam in two dimensions. We present the design and recording procedures along with results, showing a relatively uniform intensity of the wide output beam. Such expanders can serve for illuminating flat panel displays.

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