Visibly Transparent and Infrared Reflective Coatings for Personal Thermal Management and Thermal Camouflage

Thermal Properties of Reflective Helmet Exposed to Infrared Radiation

Minimax design of optically transparent and reflective coatings.

We consider the design problem of creating coatings that are either highly reflective or highly transparent. The goal is to create an optical element, consisting of planar dielectric layers, that reflects (or transmits) energy over a given range of wavelengths and angles of incidence. The approach that we take is to formulate the problem as a minimax optimization problem. We demonstrate that th...

Patternable PEDOT nanofilms with grid electrodes for transparent electrochromic devices targeting thermal camouflage

This paper reports a new type of transmitting mode electrochromic device that uses the high-contrast electrochromism of poly(3,4-ethylenedioxythiophene) (PEDOT) and operates at long-wavelength infrared (8-12 μm) . To maximize the transmittance contrast and transmittance contrast ratio of the device for thermal camouflage, we control the thickness of the thin PEDOT layer from 25 nm to 400 nm and...

Thermal Spray Coatings

THERMAL SPRAY is a generic term for a group of processes in which metallic, ceramic, cermet, and some polymeric materials in the form of powder, wire, or rod are fed to a torch or gun with which they are heated to near or somewhat above their melting point. The resulting molten or nearly molten droplets of material are accelerated in a gas stream and projected against the surface to be coated (...

Dust coatings on basaltic rocks and implications for thermal infrared spectroscopy of Mars

[1] Thin coatings of atmospherically deposited dust can mask the spectral characteristics of underlying surfaces on Mars from the visible to thermal infrared wavelengths, making identification of substrate and coating mineralogy difficult from lander and orbiter spectrometer data. To study the spectral effects of dust coatings, we acquired thermal emission and hemispherical reflectance spectra ...