Materials Chemistry

Thermal imaging and clandestine surveillance using low-cost polymers with long-wave infrared transparency

Authors

Abstract

With increasing use of infrared imaging in medical diagnostics, military and civilian surveillance, and navigation of autonomous vehicles, there is a need for low-cost alternatives to traditional materials used in infrared optics such as germanium. Sulfur-rich copolymers hold promise, as they are made from low-cost feedstocks and have a high refractive index. In this report, cyclopentadiene was copolymerized with sulfur to provide a plastic with the highest long-wave infrared transparency reported to date for this class of materials. Diverse lens architectures were accessible through melt casting or reactive injection molding. The featured copolymer was black, which enabled its use as an infrared-transparent blind for protection of thermal imaging equipment and clandestine surveillance. These findings portend expanded use of sulfur copolymers in infrared optics.

Content

Thumbnail image of Manuscript.pdf

Supplementary material

Thumbnail image of Supplementary Materials.pdf
Supplementary Materials
Part 1: Materials and Methods (Experimental Studies) Part 2: Methods and Analysis (Computational Studies)
Thumbnail image of Data 1 - cad files.zip
Data 1
CAD files for 3D printing
Thumbnail image of Integrating_with_matlab.m
Data 1
Matlab script for IR spectrum integration