All-optical and polarization-independent spatial filter based on a vertically-aligned polymerstabilized liquid crystal film with a photoconductive layer

Chia Yi Huang, Jia Ming Ma, Tin Shan Mo, Kuo Ching Lo, Kuang Yao Lo, Chia Rong Lee

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

An all-optical and polarization-independent spatial filter was developed in a vertically-aligned (VA) polymer-stabilized liquid crystal (PSLC) film with a photoconductive (PC) layer. This spatial filter is based on the effect of light on the conductivity of PC layer: high (low)-intensity light makes the conductivity of the PC layer high (low), resulting in a low (high) threshold voltage of the PC-coated VA PSLC cell. Experimental results indicate that this spatial filter is a high-pass filter with low opticalpower consumption (about 1.11 mW/cm2) in an optical Fourier transform system. The high-pass characteristic was confirmed by simulation. Accordingly, the all-optical and polarization-independent spatial filter can be used to enhance the edges of images.

Original languageEnglish
Pages (from-to)22386-22392
Number of pages7
JournalOptics Express
Volume17
Issue number25
DOIs
Publication statusPublished - 2009 Dec 7

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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