1990-08-03
1991-03-26
Arnold, Bruce Y.
350641, G02B 508
Patent
active
050023780
ABSTRACT:
A lightweight cooled mirror is disclosed in which cooling of the mirror's reflecting surface is provided by a two-phase fluid contained in an enclosed chamber behind the reflecting surface. The chamber includes an evaporator section in contact with the reflecting surface and a condenser section spaced apart from the reflecting section. The fluid is capable of existing in both liquid and gaseous states. When in a liquid state, the fluid can absorb heat from the reflecting surface which transforms the liquid into a gas. The gas is transported away from the reflecting surface to a section in the enclosed chamber where it gives up the absorbed heat by condensation and is converted back into a liquid which is reused to absorb additional heat from the reflecting surface. The liquid is transported back toward the reflecting surface by a wicking action to complete the closed loop fluid flow system.
REFERENCES:
patent: 4386825 (1983-06-01), Stalcup et al.
patent: 4433045 (1984-02-01), Gowan et al.
patent: 4435045 (1984-03-01), Fried
patent: 4770521 (1988-09-01), Thompson et al.
patent: 4772110 (1988-09-01), Roszhart
Colarusso Joseph M.
Houghton Charles D.
Arnold Bruce Y.
Litton Systems Inc.
Rotella Robert F.
Ryan J. P.
Wallach Michael H.
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