Patent · US Expired

Light-weight mirror blank for astronomical purposes and method of making a supporting framework for such blanks

US4447130A · kind A · utility

14Cited by

5References

7Claims

0Family size

Assignee

Heraeus Quarzschmelze GmbH · DE

Inventors

Uwe Christiansen · Gelnhausen, DE
Karlheinz Rau · Hanau, DE
Anton Steinkohl · Grundau, DE
Bruno Streb · Alzenau, DE

Key dates

Filing date	Apr 7, 1982
Grant date	May 8, 1984
Priority date	—
Expiry date	Apr 7, 2002

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24149
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A light-weight mirror for astronomical purposes is disclosed. The mirror consists of a mirror plate, a back plate and a supporting framework disposed between them and consisting of a plurality of rows of tubes. The rows of tubes are staggered one from the other. Each tube in a row has a line or strip of contact with two adjacently disposed tubes of the next row. The tubes are welded together along the contact line or strip. The thickness of the tube wall is reduced in the area of the contact line or strip.

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