We have developed a prototype high-definition imaging system using polymer-dispersed liquid-crystal (PDLC) light valves, which can modulate unpolarized light with high spatial resolution and exhibit a high optical efficiency, based on the light-scattering effect. We fabricated high-definition light valves with a fine polymer-matrix structure in a PDLC film by controlling the curing conditions used during the photopolymerization-induced phase separation and formation process. This device has excellent characteristics, such as a high resolution, with 50 lp/mm for a limiting resolution and greater than 20 lp/mm at the 50% modulation transfer function point, and a reflectivity of greater than 60%. An optically addressable full-color projection display was designed, consisting of three PDLC light valves, a schlieren optical system based on shift-decentralization optics with a xenon lamp illumination and input-image sources with 1.5 million pixels, including electrical image compensation of the gamma characteristics. We succeeded in displaying pictures on a 110-inch screen with a resolution of 810 TV lines and a luminous flux of 1900–2100 American National Standards Institute lumens.
© 2004 Optical Society of America
(120.2040) Instrumentation, measurement, and metrology : Displays
(220.4830) Optical design and fabrication : Systems design
(230.3720) Optical devices : Liquid-crystal devices
(230.6120) Optical devices : Spatial light modulators
Hiroshi Kikuchi, Takanori Fujii, Masahiro Kawakita, Yoshiyuki Hirano, Hideo Fujikake, Fumio Sato, and Kuniharu Takizawa, "High-Definition Imaging System Based on Spatial Light Modulators with Light-Scattering Mode," Appl. Opt. 43, 132-142 (2004)