Mirror foamed glass substrate and method of manufacture

Details Mirror foamed glass substrate and method of manufacture Mirror foamed glass substrate and method of manufacture

1985-12-18

1987-06-02

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

156297, 156299, 156300, 428 49, 428 54, 428 55, 4283148, 4283166, 4283171, 4283191, B32B 326, B32B 1706

Patent

active

046703381

ABSTRACT:
A mirror substrate, in particular for use in astronomical optics, comprises two symmetrical preformed plates of glass (10, 12) glued by their respective inside faces (26, 28) on either side of an intermediate structure (14), the outside face (38) of one of the plates (10) being suitable for subsequently receiving a reflecting coating. The intermediate structure (14) is a composite structure made of glass foam which is substantially uniform in nature, and in the preferred embodiments it comprises a central core (16) of glass foam together with two sets (18 and 20) of blocks of glass foam.

REFERENCES:
patent: 1748587 (1930-02-01), Smedley
patent: 3184371 (1965-05-01), Seidl
patent: 3912380 (1975-10-01), Klein
patent: 4035065 (1977-07-01), Fletcher et al.
patent: 4422893 (1983-12-01), Duchateau et al.

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