Dewar Design for Optical Noise Reduction in Very Low Signal Applications

摘要

This paper describes design features that are being implemented in a purpose-built IR camera system to supportthe study of the solar corona during the 2019 Chile total eclipse. This mission is challenged by the relatively low, inbandflux signal conditions present during the eclipse, and the larger system’s need to identify the specific, verynarrow spectral bands of interest. With the features implemented within the dewar, the required improvement inscene contrast and detector sensitivity was achieved.