SiC optics for Earth observing applications

Joseph Robichaud; James J. Guregian; Mark Schwalm

doi:10.1117/12.505701

10 November 2003 SiC optics for Earth observing applications

Joseph Robichaud, James J. Guregian, Mark Schwalm

Proceedings Volume 5151, Earth Observing Systems VIII; (2003) https://doi.org/10.1117/12.505701
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

An overview of silicon carbide (SiC) materials is provided, focusing on the optical properties required for space-based earth observing applications. NASA’s SiC Advanced Land Imager (ALI), produced by SSGPO and flown under the New Millennium Program, is described in order to illustrate the suitability of SiC to provide high-quality optics for these critical applications. The manufacturing processes used to produce SiC optics are described and recent improvements in the surface figure, surface finish, and stray light performance associated with SiC optics are reported. The two critical optical properties associated with the ALI instrument are surface figure and Bi-directional Reflectance Distribution Function (BRDF). In the results reported here, we demonstrate the ability to exceed these requirements by an order of magnitude using mature and repeatable processes.

Citation Download Citation

Joseph Robichaud, James J. Guregian, and Mark Schwalm "SiC optics for Earth observing applications", Proc. SPIE 5151, Earth Observing Systems VIII, (10 November 2003); https://doi.org/10.1117/12.505701

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