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- W2067352283 abstract "A program to fabricate a large, optically fast, aspheric lightweight Be mirror has demonstrated state-of-the-art technology. The mirror blank was fabricated as a 1.0-m diameter, f/0.58 ellipse, directly from IP-70 grade powder, using near-net-shape HIPing as well as a patented tooling approach that produced a closed back, honeycomb-cored mirror weighing less than 18 kg. Details of the mirror design and of the assembly for HIPing are given. The blank was HIPed, leached and machined to final shape with all design goals met; as-HIPed, the blank was within +/- 0.5-mm in all dimensions, and the radius of curvature was within 0.2 percent of target. The mirror was loose-abrasive ground using plunge grinding with a full-size tool, then rough polished using a full-size flexible pitch lap. In-process metrology used a special swing-arm profilometer with demonstrated accuracy and repeatability below one micron." @default.
- W2067352283 created "2016-06-24" @default.
- W2067352283 creator A5020202551 @default.
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- W2067352283 date "1991-09-01" @default.
- W2067352283 modified "2023-09-23" @default.
- W2067352283 title "Fabrication of a fast, aspheric beryllium mirror" @default.
- W2067352283 doi "https://doi.org/10.1117/12.46520" @default.
- W2067352283 hasPublicationYear "1991" @default.
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