infrared heterodyne detector

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.