Maintenance of uniform optical window properties

Details Maintenance of uniform optical window properties Maintenance of uniform optical window properties

1985-12-23

1989-05-09

Goldberg, E. A.

Electric heating

Heating devices

With heater-unit housing, casing, or support means

219200, 219201, 219203, 219219, 219483, 219486, 219543, 219547, 244134D, 244134E, 52171, H05B 306, B64D 1500, B24B 2300

Patent

active

048291625

ABSTRACT:
Uniform electrical heating of a circular, single crystal germanium window (18) uses its bulk resistance and pairs of electrodes (20) equally spaced about the window's periphery. The electrode pairs are sequentially switched at a rate high enough to avoid thermal switching transients.

REFERENCES:
patent: 3982092 (1976-09-01), Marriott
patent: 4036457 (1977-07-01), Volhner et al.
patent: 4039246 (1977-08-01), Voight
patent: 4346286 (1982-08-01), Romp
patent: 4443691 (1984-04-01), Sauer

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