Systems-level polarization modeling of multispectral space sensors

摘要

Abstract: The 2% polarization sensitivity specification in many of NASA's Earth Observing System sensors has motivated Santa Barbara Research Center (SBRC) to develop computer programs that model the polarization characteristics of optical systems. In support of the Moderate Resolution Imaging Spectroradiometer (MODIS) program, SBRC has developed an analytical tool which unites the completed 3-dimensional lens design and coating designs to accurately predict an optical system's polarization characteristics. The effects of an object space scanning mirror, parallel plate polarization compensators, non-normal incidence reflection and transmission from dichroic beam splitters and protected silver mirrors are analyzed without the need for proprietary coating prescriptions. The phenomenon of diattenuation and phase change are treated using the Jones matrix formalism. The only inputs to the Macintosh based spreadsheet are the S and P reflection components, and their phase differences as a function of wavelength, as well as the plane of incidence rotations. !2