Compact beam expander with linear gratings.
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.
Shechter
Revital
R
Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel. ferevita@wisemail.weizmann.ac.il
Amitai
Yaakov
Y
Friesem
Asher A
AA
D008962:Models, Theoretical; D055095:Optics and Photonics