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Device for receiving and transmitting coded light signals and IFF system incorporating this device

  • US 4,249,265 A
  • Filed: 09/27/1979
  • Issued: 02/03/1981
  • Est. Priority Date: 10/06/1978
  • Status: Expired due to Term
First Claim
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1. A device adapted to receive coded light signals and to transmit modulated light signals in the direction of the incident signals, comprising an omnidirectional detection device composed of a plurality of radiation sensors, an optical device for reflecting the light signal in its own direction, a recognition and encoding circuit connected to said sensors and an optical modulator operable to prevent the reflection of the light signal, said modulator being controlled by said circuit, said modulator comprising a shutter rotatable about the axis of the detection device, a member for driving the shutter controlled by the recognition and encoding circuit and a second circuit connected to the outputs of the sensors to determine which one of the sensors receives the incident beam, said second circuit delivering to the drive member a control signal for setting the initial angular position of the shutter.

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