CRYOGENICALLY COOLED FARADAY ROTATOR ELEMENT

摘要

A semiconductive optical window of the type exhibiting a Faraday rotation in the presence of a magnetic field is cryogenically cooled in a dewar having flexure mounts for the element. The flexure mounts comprise metallic supports having a suitable aspect ratio (length to thickness) to guarantee adequate flexure, the supports being bonded to the element. The flexure mounts are disposed on opposite faces of the element and circumscribe a clear optical path through the element near the periphery of the element; this provides a fluid seal between the clear optical path through the element and the extreme periphery of the element, whereby the extreme periphery is immersed in cryogenic fluid. The element is disposed in an evacuated chamber for insulating purposes.