High-definition imaging system based on spatial light modulators with light-scattering mode

Hiroshi Kikuchi, Takanori Fujii, Masahiro Kawakita, Yoshiyuki Hirano, Hideo Fujikake, Fumio Sato, Kuniharu Takizawa

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)132-142
Number of pages11
JournalApplied Optics
Issue number1
Publication statusPublished - 2004 Jan 1


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