Cooled transmissive mirrors, beam splitters, windows, and refrac

Details Cooled transmissive mirrors, beam splitters, windows, and refrac Cooled transmissive mirrors, beam splitters, windows, and refrac

1989-05-03

1991-12-17

Arnold, Bruce Y.

Optical: systems and elements

Mirror

Fluid cooled mirror

359883, G02B 508

Patent

active

050738313

ABSTRACT:
An optical element having a thin, transparent plate containing a plurality of shallow cooling channels, and a transparent substrate immediately behind the plate with a plurality of inlet and exhaust ducts underlying and in fluid communication with coolant being circulated through the cooling channels of the plate. In use, the optical element may be configured as a beam splitter, mirror, or aperture sharing device by applying a coating that is at least partially reflective to the face plate of the element. Alternatively, if used as a window or refractive element, the above cooling structure can be applied to both faces of the element. Optical distortion can be further reduced by using a coolant having a refractive index matching that of the substrate.

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