Popis

SSG Precision Optronics proposes the development and demonstration of a new optical fabrication process for the production of EUV quality Silicon Carbide (SiC) optics. The process combines three technologies to provide a cost and schedule effective solution for lightweight, thermally stable precision optics for EUV applications. First, near-net-shape cast SiC materials for monolithic lightweighted, SiC mirror substrates with minimal machining required. Second, a thin CVD SiC sputter deposition process applied to the mirror facesheet. This enables a low-scatter surface as well as high reflectance in the EUV band. Third, the application of Tinsley?s computer controlled optical surfacing (CCOS) grinding and polishing makes it possible to generate aspheres with extremely accurate surfaces. The manufacturing process proposed allows production of state-of-the-art SiC aspheric mirrors with numerous benefits compared to competing technologies and traditional processes: ?Excellent Surface Figure Accuracy (<0.01 waves RMS, over low and mid-spatial-frequency measurements); ?Ultra-low micro-roughness (<10 Angstroms RMS routine, <1 Angstrom RMS achievable); ?Improved yield; ?Very low areal densities (~10 kg/m2 at an aperture of 1 meter); ?Superior thermal stability (SiC bulk material properties); In Phase 2, SSGPO will demonstrate an optimized optical fabrication process by producing a SiC EUV flight-ready optic.

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  http://catalog.data.gov/dataset/high-quality-low-scatter-sic-optics-suitable-for-space-based-uv-amp-euv-applications-proje Do you think this data is incorrect? Let us know

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