The Perkin-elmer Corporation

Perkinelmer International C.v.

David J Cutler

An infra-red radiation detector having a Dewar type vessel is provided with a coupler which is coupled to the wall of the vessel. The coupler includes a fiber which can transmit infra red radiation and which terminates close to a detector provided in the Dewar type vessel. No special optical arrangement is required in order to couple an external fiber to the detector and the arrangement is inherently aligned.

Fibre optic coupler detector

An interferometer comprises a source of radiation (10) and a beam splitter (12) for forming two beams. The beams travel along different optical paths and the optical path difference of the paths can be varies by rotatable mirror pairs M2/M3 and M4/M5. One of the paths includes an adjustable mirror M6 which is tiltable in orthogonal directions. A control unit (18) can be automatically initiate periodically an alignment procedure for aligning the interferometer.

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Nr Amersham, United Kingdom

David J Cutler