Bistable spatial light modulator using guest-host liquid crystal and Bi12GeO20 layers

Hideo Fujikake, Kuniharu Takizawa, Hiroshi Kikuchi, Masakatsu Okada

研究成果: Conference article査読

1 被引用数 (Scopus)


Bistable spatial light modulators (BSLMs) composed of a liquid crystal (LC) cell and a photoconductor, which have two-dimensional optical nonlinear functions (hysteresis, differential gain and limiting), are useful for optical computing and image processing. This paper reports optical parallel logic operations using a new type of compact transmission-mode BSLM which has the advantages of spatial uniformity and a simple device structure. The BSLM consists of a guest-host (GH) LC layer which contains nematic LC and dichroic dye molecules twisted by 90° between two alignment layers, a Bi12GeO20 (BGO) crystal layer with a thickness of 1.7 mm, which is conductive under blue light illumination, and transparent indium tin oxide electrodes. The bistable properties of the BSLM can be used for various aspects of nonlinear image processing such as logic operations, intensity level thresholding and memory.

ジャーナルProceedings of SPIE - The International Society for Optical Engineering
出版ステータスPublished - 1990 12月 1
イベント1990 International Topical Meeting on Optical Computing - OC '90 - Kobe, Jpn
継続期間: 1990 4月 81990 4月 12

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学


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