Patent · US Expired

Lightweight mirror especially for astronomical purposes

US4466700A · kind A · utility

22Cited by

0References

13Claims

0Family size

Assignee

Heraeus Quarzschmelze GmbH · DE

Inventors

Uwe Christiansen · Gelnhausen, DE
Karlheinz Rau · Hanau, DE
Fritz Simmat · Gelnhausen, DE

Key dates

Filing date	May 1, 1981
Grant date	Aug 21, 1984
Priority date	—
Expiry date	May 1, 2001

Classification

Technology area (CPC G)Physics
CPC primaryG02B5/10
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

The lightweight mirror has a special core construction. The core consists of flat and/or tubular pieces which are joined together by means of a sintering composition. The sintering composition has open pores. In the production of the core, the sintering composition is poured into interstices between pairs of adjacent flat and/or tubular pieces and heated to the sintering temperature in a nonoxidizing atmosphere together with the flat and/or tubular pieces. A layer of sintering composition can be provided on the faces of the front and/or back plate of the lightweight mirror which confront the core. Stiffening rods can be embedded in the sintering composition.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.