infrared heterodyne detector

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infrared heterodyne detector [¦in·frə¦red ¦hed·ə·rə‚dīn di′tek·tər]

(electronics)

A heterodyne detector in which both the incoming signal and the local oscillator signal frequencies are in the infrared range and are combined in a photodetector to give an intermediate frequency in the kilohertz or megahertz range for conventional amplification.

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