A source discriminator comprises a diffusing surface (10) provided to receive radiant energy over a wide field of view. Radiant energy received is transmitted from the diffusing surface (10) along an optical fiber (12) of a preselected numerical aperture to a radiant energy filter or grating (18). The numerical aperture of the optical fiber is preselected to provide an acceptable half-cone of arrival of radiant energy at the filter or grating (18). From the radiant energy filter or grating (18), the radiant energy passes to photosensors, the output signals of which are used; is the source discriminator system.
Richard H. Laughlin - Richardson TX Peter Sorensen - Garland TX
Assignee:
Varo, Inc. - Garland TX
International Classification:
H04B 900 H04N 704
US Classification:
250199
Abstract:
The specification discloses a wireless optical communications link which includes a transmitter housing having circuitry for receiving electrical audio and video signals. A light emitting diode is mounted in the transmitter housing for generating a directional beam of light. Circuitry modulates the beam of light in accordance with the audio and video signals. A receiver housing is adapted to be located remote from the transmitter housing and includes an aspheric Fresnel lens for receiving and focusing the beam of light. A photodiode is mounted in the receiver housing for generating electrical output signals in response to the received beam of light. Circuitry is responsive to the electrical output signals for reconstructing the audio and video signals at the remote location.