25” Diameter, 159.1” concave radius Mirror; 1/3 wave; telescope, blank - $2,500 - (Apex, NC)
Normal 0 This mirror was one of two custom-made in Dec. 2001 for an instrument. One was used and this one has been stored, unopened and unused. The original shipping box was just opened in order to take pictures for this posting, and to inspect for any damage. The mirror is in like new-condition, there are a handful of small surface coating contamination spots as shown in the pictures; these appear as a milky film-like spot on surface and are few in number and size. I did not attempt to clean the mirror, it is in as-shipped and received state. All original documentation and specs will be provided. The mirror cost was $8000 in 2001. Please ask any questions prior to bidding, as this item weighs 93 pounds, and returns will not be accepted unless for just cause. Buyer to pay shipping and insurance for 93 pounds per desired shipping method, US sales only. Specifications:25” dia, 159.1” concave spherical radius of curvature, 2” thick Precision annealed Pyrex , wavefront accuracy 1/3 wave or better @633 nm (see interferometry data) Coating 120nm aluminum, ½ wave SiO2 for 365 nn, 86-90% R; clear aperture better than 95% of 25” diameter. Manufactured by Galaxy Optics in Dec. 2001.
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