Electrochromic Laminates For Advanced Spacesuit Visors

NASA#39;s Extravehicular Mobility Unit, or EMU, is a personal mini-spacecraft that comprises the space suit assembly and life support systems. The current EMU has a manually operated extravehicular visor assembly (EVVA) that provides protection from micrometeoroids and from solar ultraviolet and infrared radiation. For the integration of EVVA with NASArsquo;s next generation space suits helmet bubble, dynamically switching technologies are needed to provide tint-ability, radiation protection, and optimized transmittance. Giner proposes to develop an electrochromic space suit helmet bubble that would provide high optical contrast between its clear (transparent) and dark (opaque) states, tunable switching, and a control module that would allow for both user and ambient light control. This electrochromic visor will provide gt;55% contrast at 550 nm, rapid (~ 1 sec) switching, and low power requirements. Taking advantage of flexible transparent electrodes, a new generation of solution processable electrochromic polymers, and robotic coating on doubly-curved surfaces, Giner will develop and thoroughly test a prototype visor that meets or exceeds the performance and durability requirements listed by NASA. At the end of the program, a full size (10rdquo; 13rdquo; hemi-ellipsoid dome), self-powered prototype visor will be delivered.