Alternatively, these systems may have exterior tracking devices or marks that can be detected by external ultrasound, optical receivers or electromagnetic sensors.

The main component of an optical receiver is a photodetector, which converts light into electricity using the photoelectric effect.

The optical receiver is like the sailor on the deck of the receiving ship.

I leaned my head back to look up to the wide screens of the optical receiver.

A complete RONJA system is made up of 2 transceivers: 2 optical transmitters and 2 optical receivers.

The optical receiver itself behaves as a weak retroreflector because it contains a large, precisely focused lens that detects illuminated objects in its focal plane.

The first is a twelve channel system consisting of an optical transmitter and an optical receiver.

Construction of the optical receiver.

It was a gossamer-thin array of optical and microwave receivers, flung out like a fishing net.

Missiles with small optical receivers on their tail can beam ride on lasers with similar ease as earlier radar beam systems, but will be inherently more accurate.