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Proceedings Paper

Solid-state monolithic electrochromic switchable visors and spectacles
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Paper Abstract

There is a need for variable transmission technology for Goggles, Spectacles, and visors for Helmet-Mounted Displays (HMDs). At present, most HMDs do not allow the pilot to control the transmission level of a flight visor while transitioning from high to low light levels throughout flight. Sunglasses are often used for non-HMD conditions but become impractical for HMD use. For individuals moving from high to low brightness levels, momentary blindness is an issue in both recreational sports and military applications. A user-controlled or automatically controllable variabletransmittance lens is a possible solution. The Eclipse Visible Electrochromic Device (EclipseECDTM) is well suited for these light modulation applications. The EclipseECDTM modulates light intensity by changing the absorption level under an applied electric field. The optical density may be continuously changed by varying voltage allowing for analog instead of digital (on/off) light levels. EclipseECDTM is comprised of vacuum deposited layers of a transparent bottom electrode, an active element, and a transparent top electrode, incorporating an all, solid-state electrolyte. The solid-state electrolyte eliminates possible complications associated with gel-based or liquid crystal based technologies including lamination, and precludes the need for additional visor modifications. This all solid-state ECD system can be deposited on flexible substrates, eg. PET, PC, etc. The low-temperature deposition process enables direct application to polymer lenses and HMD flight visors. Additionally, the coating is easily manufactured; can be trimmed, has near spectral neutrality and fails in the clear (bleached) condition.

Paper Details

Date Published: 6 May 2009
PDF: 8 pages
Proc. SPIE 7326, Head- and Helmet-Mounted Displays XIV: Design and Applications, 73260K (6 May 2009); doi: 10.1117/12.818730
Show Author Affiliations
Hulya Demiryont, Eclipse Energy Systems, Inc. (United States)
Kenneth Shannon, Eclipse Energy Systems, Inc. (United States)


Published in SPIE Proceedings Vol. 7326:
Head- and Helmet-Mounted Displays XIV: Design and Applications
Peter L. Marasco; Paul R. Havig; Sion A. Jennings; Thomas H. Harding, Editor(s)

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