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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 17 — Jun. 10, 2012
  • pp: 3744–3754

Investigation of five types of switchable retroreflector films for enhanced visible and infrared conspicuity applications

P. Schultz, B. Cumby, and J. Heikenfeld  »View Author Affiliations


Applied Optics, Vol. 51, Issue 17, pp. 3744-3754 (2012)
http://dx.doi.org/10.1364/AO.51.003744


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Abstract

We report on the physics, design, characterization, and demonstration of five viable techniques for switchable retroreflectors, including integrated electrowetting scattering, integrated and external electrowetting light valves, external liquid crystal light valve, and external liquid crystal scattering. All techniques were evaluated for use in conspicuity applications spanning wavelengths in the visible and IR (night vision). Achieved performance includes high optical efficiencies up to nearly 30% (out of a maximum 35%), visibly fast switching speeds of <100ms, low to moderate operating voltages ranging from 5 to 60 V, more than ±45deg of operation angle, and implementation with pressure-sensitive, adhesive-backed films of 0.7 to 1 mm thickness for flexibility and impact resistance. Each approach has unique strengths and weaknesses, which will also be discussed for applications ranging from commercial to military conspicuity.

© 2012 Optical Society of America

OCIS Codes
(230.0230) Optical devices : Optical devices
(230.2090) Optical devices : Electro-optical devices
(230.4000) Optical devices : Microstructure fabrication
(230.4110) Optical devices : Modulators
(260.3060) Physical optics : Infrared

ToC Category:
Optical Devices

History
Original Manuscript: February 7, 2012
Revised Manuscript: March 26, 2012
Manuscript Accepted: March 28, 2012
Published: June 4, 2012

Citation
P. Schultz, B. Cumby, and J. Heikenfeld, "Investigation of five types of switchable retroreflector films for enhanced visible and infrared conspicuity applications," Appl. Opt. 51, 3744-3754 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-17-3744

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