Multi‐spectral flare designs using both red‐ and green‐light emitters: Progress towards wavelength selectable signals

• DOI: 10.1002/prep.202200224
• Publication Date: 2023-05-17T11:55:26Z
• Authors: Lance N. Kotter; Richard H. B. Bouma; Lori J. Groven
• Keywords: Standard illuminant; Reflector (photography); Flare; SIGNAL (programming language)

Abstract Pyrotechnic flares are used extensively, with each color relating to specific information such as landing zone, enemy location, medical evacuation, or submarine location. While all current military restricted a single illumination color, progress towards wavelength selectable signal and/or multispectral is of interest. In this effort, we use additive manufacturing, via direct ink write approach, print three unique configurations green/red light emitter compositions (GLE/RLE). Varying the infill design provides opportunity fire either base colors individually (red‐ green‐light illuminant) them simultaneously achieve result. work, architecture shown play critical role, and when GLE composition approx. 70 wt% overall, then reasonable multi‐spectral result achieved. early, work demonstrates that there significant promise optimize signals achievable manufacturing.