Solid-state monolithic electrochromic switchable visors and spectacles

Hulya Demiryont; Kenneth Shannon III

doi:10.1117/12.818730

6 May 2009 Solid-state monolithic electrochromic switchable visors and spectacles

Proceedings Volume 7326, Head- and Helmet-Mounted Displays XIV: Design and Applications; 73260K (2009) https://doi.org/10.1117/12.818730
Event: SPIE Defense, Security, and Sensing, 2009, Orlando, Florida, United States

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 (EclipseECD^TM) is well suited for these light modulation applications. The EclipseECD^TM 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. EclipseECD^TM 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.

Citation Download Citation

Hulya Demiryont and Kenneth Shannon III "Solid-state monolithic electrochromic switchable visors and spectacles", Proc. SPIE 7326, Head- and Helmet-Mounted Displays XIV: Design and Applications, 73260K (6 May 2009); https://doi.org/10.1117/12.818730

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