Curved reflector with adjustable focal length

Details Curved reflector with adjustable focal length Curved reflector with adjustable focal length

1980-05-14

1981-09-08

Evans, F. L.

G02B 510

Patent

active

042881463

ABSTRACT:
A curved reflector of electro-magnetic radiation formed of an elastic, reflective membrane which utilizes a partial vacuum to provide the curvature to the membrane and an adjustable valve to vary such curvature, and therefore the focal length of the reflector. The valve comprises a central aperture in the membrane and a body adjustably mounted above the aperture with a flow restricting surface thereon which overlies the aperture.

REFERENCES:
patent: 4179193 (1979-12-01), Gillette et al.

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