Patent ID: 9643367
Date: 2017-05-09
CPC Classifications: B29D,G02B

Claim:
1. A method for producing a composite mirror for an observation satellite, comprising the steps of: providing a glass blank with a low coefficient of expansion; machining a convex shape in the glass blank; laying a front skin impregnated with resin over the convex shape of the glass blank; machining, in a rear supporting structure, a concave shape matching the convex shape machined in the glass blank; gluing the concave shape of the supporting structure onto the convex shape of the glass blank; machining a convex shape in the supporting structure; laying a rear skin impregnated with resin in a mould with a low coefficient of expansion whose shape matches the convex shape of the supporting structure; gluing the rear skin onto the convex shape of the supporting structure, turning over the assembly formed by the glass blank, the front skin, the supporting structure and the rear skin so that the blank lies in the upper portion of the assembly; and machining and polishing a mirror in the glass blank.