Current science projections for future earth-imaging instruments indicate the need for as many as 25 spectral bands, with bandwidths as narrow as 20 nanometers. The desire for a multiplicity of bands has led researchers to study various spectrally dispersive instrument designs as a means of providing the desired future capability. These instrument designs, however, are costly, complex, and of high technical risk. This paper describes a "multiband selection device" containing several spectral filters that can be placed at the exit faces of a broadband multiport beam splitter and thereby provide a multiplicity of spectral bands with a high degree of spatial coregistration while utilizing state-of-the-art linear array detectors. Fabrication of the multiband selection device has been successfully accomplished, and the design and test results are described.
Herbert L. Richard,
Aram M. Mika,
Roland O. Davis,
"Multiband Selection Device", Proc. SPIE 0481, Recent Advances in Civil Space Remote Sensing, (1 August 1984); doi: 10.1117/12.943062; https://doi.org/10.1117/12.943062