title: High-definition imaging system based on spatial light modulators with light-scattering mode.
abstract: 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.
authors.affiliation: Science & Technical Research Laboratories, NHK (Japan Broadcasting Corporation), 1-10-11 Kinuta, Setagaya-ku, Tokyo 157-8510, Japan. kikuchi.h-co@nhk.or.jp
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kikuchi
authors.forename: Takanori
authors.initials: T
authors.lastname: Fujii
authors.forename: Masahiro
authors.initials: M
authors.lastname: Kawakita
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Hirano
authors.forename: Hideo
authors.initials: H
authors.lastname: Fujikake
authors.forename: Fumio
authors.initials: F
authors.lastname: Sato
authors.forename: Kuniharu
authors.initials: K
authors.lastname: Takizawa