Electrochromic variable transmission optical combiner

Russell S. Draper; Michael V. Wood; Bijan Radmard; Ken Mahmud; Peter Schuler; Gregory A. Sotzing; Venkataraman Seshadri; Warren Mino; Javier Padilla; Tobibio F. Otero

doi:10.1117/12.609036

25 May 2005 Electrochromic variable transmission optical combiner

Russell S. Draper, Michael V. Wood, Bijan Radmard, Ken Mahmud, Peter Schuler, Gregory A. Sotzing, Venkataraman Seshadri, Warren Mino, Javier Padilla, Tobibio F. Otero

Author Affiliations +

Proceedings Volume 5801, Cockpit and Future Displays for Defense and Security; (2005) https://doi.org/10.1117/12.609036
Event: Defense and Security, 2005, Orlando, Florida, United States

Abstract

Complementary coloring conducting polymer based electrochromic devices have been designed, fabricated and tested for possible application as a variable attenuation combiner element for a see-through head mounted display or a variable trasnsmissive sand wind dust goggle lens. Electrochromic cells fabricated on both glass and polycarbonate substrates have been demonstrated to meet closely the desired goals of low power consumption, wide transmission range, fast switching speeds and long lifetime. Photopic transmissions of 34% in colored state and 67% in bleached state were achieved in a reproducible manner. The measured switching times are 0.6 sec (colored to bleached state) and 1.9 sec (bleached to colored state). The life cycle testing showed stability up to 92,000 switches. The measured power consumption of the fabricated devices was < 1 mW/cm . The electrochromic technology design effort has identified processes for obtaining the optimum layer thickness and selecting polymers and gel electrolytes necessary to obtain the widest transmission range, fastest switching speed and longest lifetime. Early environmental testing has been performed by subjecting prototype electrochromic cells to temperatures varying from -30°C to + 40°C with the results reported herein. Follow on work includes further optimization of electronic drive schemes as well as field testing of electrochromic lens equipped sand, wind dust goggles.

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Russell S. Draper, Michael V. Wood, Bijan Radmard, Ken Mahmud, Peter Schuler, Gregory A. Sotzing, Venkataraman Seshadri, Warren Mino, Javier Padilla, and Tobibio F. Otero "Electrochromic variable transmission optical combiner", Proc. SPIE 5801, Cockpit and Future Displays for Defense and Security, (25 May 2005); https://doi.org/10.1117/12.609036

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