Thermally stabilized mirror

Details Thermally stabilized mirror Thermally stabilized mirror

1979-06-25

1980-09-09

Evans, F. L.

G02B 508

Patent

active

042214696

ABSTRACT:
An optical mirror having coolant means for compensating thermal tilt of the reflective surface is disclosed. The optical mirror has a laminated structure formed of a plurality of plates including a faceplate, a second plate, a third plate, a substrate plate and a back plate each having coolant means therein for passing a coolant therethrough. The plurality of plates are bonded together to form the laminated structure. Each of a plurality of first coolant channels disposed within the faceplate have a substantially parallel relationship with one another and a substantially vertical, parallel relationship with each of a plurality of second coolant channels disposed within the second plate. Counterflowing coolant within adjacent coolant channels in the faceplate and in the second plate and between vertically adjacent first and second coolant channels essentially eliminates tilt of the reflective surface resulting from the absorbed heat load and the frictional heating of the coolant flowing through the coolant channels. Heating channels disposed within the back plate are adapted for passing heated coolant therethrough for inducing a thermal stress within the back plate in a direction and magnitude to balance bending stress produced within the faceplate by the thermal growth of the faceplate in the radial direction resulting from heat generated by radiation incident thereon.

REFERENCES:
patent: 3708223 (1973-01-01), Sorensen et al.
patent: 3781094 (1973-12-01), Guest
patent: 3817800 (1974-06-01), Dunn et al.
patent: 3884558 (1975-05-01), Dunn et al.
patent: 3909118 (1975-09-01), Schmidt
patent: 4110013 (1978-08-01), Eitel

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