This is an aluminized 8 inch diameter parabolic mirror. The mirror was figures from a blank of poured Pyrex glass. The focal length is 130 inches resulting in an f-ratio of 16.25. Condition of the mirror is excellent – just a couple of voids in the coating at the very margin where it was secured by a retaining ring. Thickness at the margin is 1.39 inches with a relief of about 0.125 inches on the back of the mirror.
Location OA 14C
Photo set 1074