Lightweight reflector assembly

Details Lightweight reflector assembly Lightweight reflector assembly

Filed on

1975-09-24

Date issued

1977-07-12

Examiner

Corbin, John K.

Other Related Categories

350288, 350320, G02B 508, B02B 718

Type

Patent

Status

active

Patent number

040350657

Description

ABSTRACT:
An inexpensive, lightweight reflective assembly member having good optical quality is provided. The reflective assembly is particularly adaptable to accommodating temperature variations without providing destructive thermal stresses and reflective slope errors. The reflective assembly may consist of a thin lamina reflective surface member and a lightweight substrate member of cellular structure. The respective materials may be chosen so that the coefficient of thermal expansion will be approximately the same. The substrate can comprise a cellular glass block while the reflective lamina member can be a thin sheet of glass with appropriate reflective coating. The lamina and cellular substrate member can be bonded together to form the reflective assembly. The method of fabrication includes abrading the cellular substrate with an abrasive master die to form an appropriate concave surface. An adhesive can be applied to the abraded surface and a lamina reflective surface can be placed under a uniform pressure to conform the reflective surface onto the desired abraded surface of the substrate.

REFERENCES:
patent: 1532002 (1925-03-01), Thomson
patent: 3661546 (1972-05-01), Busdiecker et al.
patent: 3754812 (1973-08-01), Mohn
patent: 3841737 (1974-10-01), Rambauske et al.
patent: 3856384 (1974-12-01), Kryzhanovsky
patent: 3912380 (1975-10-01), Klein

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