The E-O curve and phase shift of LCoS panel at different temperature and wavelength

Sylvia Hong, Engle Liao, Mike Stover, Li Yuan Liao, Cheng-Huan Chen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Liquid crystal on silicon (LCoS) can be devised as a pure phase type spatial light modulator (SLM) with proper arrangement of incident light polarization and choice of liquid crystal mode. The applications include digital holography, optical switching and adaptive optics etc. The phase retardation at each pixel on the LCoS SLM can be controlled by driving voltage, but the relationship is dependent of temperature and wavelength. In this paper, a vertical aligned nematics (VAN) mode LCoS has been used for investigation. Consideration the application environment, temperature range was set in between 30 to 70°, and the selected wavelength was 623 nm, 526 nm and 462 nm. We measured the E-O curve and converted into phase shift by equation. The result shows that the phase retardation decreases with both the increase of temperature and wavelength. The dynamic behavior of LC material is also reported in this paper, and a digital hologram from a digital-drive LCoS SLM with 6.4 μm pixel is demonstrated.

Original languageEnglish
Title of host publicationInternational Symposium on Photoelectronic Detection and Imaging 2013
Subtitle of host publicationOptical Storage and Display Technology
DOIs
StatePublished - 17 Sep 2013
EventFifth International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013 - Beijing, China
Duration: 25 Jun 201327 Jun 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8913
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceFifth International Symposium on Photoelectronic Detection and Imaging, ISPDI 2013
CountryChina
CityBeijing
Period25/06/1327/06/13

Keywords

  • birefringence
  • digital modulation
  • liquid crystal on silicon (LCoS)
  • phase shift
  • Spatial light modulator (SLM)

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