Light-weight mirror blank for astronomical purposes and method o

Details Light-weight mirror blank for astronomical purposes and method o Light-weight mirror blank for astronomical purposes and method o

1982-04-07

1984-05-08

Epstein, Henry F.

Stock material or miscellaneous articles

Composite

Of bituminous or tarry residue

52806, 428116, 4289122, B32B 312, G02B 508

Patent

active

044471300

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.

REFERENCES:
patent: 1888341 (1932-11-01), Winckler
patent: 2988959 (1961-06-01), Pelkey et al.
patent: 3728186 (1973-04-01), Mohn
patent: 3754812 (1973-08-01), Mohn
patent: 4331383 (1982-05-01), Christiansen

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