Concentration of diffuse linear light sources with continuous optical elements.
A new technique for geometric transformation of a diffuse linear light source into a two-dimensional symmetric virtual source is proposed and demonstrated. It involves two cylindrical lenses and a single holographic element that is optically recorded with a simple and single step. The results for a specific arrangement that transforms a 40 mm x 0.4 mm source, with diffusive angle of 0.1 rad, into a 1 mm x 1.2 mm nearly symmetric spot are presented. The lack of sharp boundaries in either the beam or the optical elements suppresses any diffraction losses, relaxes alignment tolerances, and improves stability.
Davidson
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Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot 76100, Israel. fedavid@wis.weizmann.ac.il
Khaykovich
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