Laser projection using generalized phase contrast.
We demonstrate experimental laser projection of a gray-level photographic image with 74% light efficiency using the generalized phase contrast (GPC) method. In contrast with a previously proposed technique [Alonzo, New J. Phys. 9, 132 (2007)], a new approach to image construction via GPC is introduced. An arbitrary phase shift filter eliminates the need for high-frequency modulation and conjugate phase encoding. This lowers device performance requirements and allows practical implementation with currently available dynamic spatial light modulators.
Glückstad
Jesper
J
Optics and Plasma Research Department, Risø National Laboratory, Technical University of Denmark, DK-4000 Roskilde, Denmark. jesper.gluckstad@risoe.dk
Palima
Darwin
D
Rodrigo
Peter John
PJ
Alonzo
Carlo Amadeo
CA