Distributed infrared communication system
First Claim
1. An infrared communication sensor for detecting modulated infrared carrier radiation, comprising:
- infrared detecting means for generating an electrical signal in response to modulated incident infrared radiation and representative of the modulation thereof;
an infrared transparent cover located over the infrared detecting means, andan infrared transparent Faraday shield located between the incident infrared radiation and the infrared detecting means and spaced therefrom to shield the latter against extraneous electric fields.
3 Assignments
0 Petitions
Accused Products
Abstract
A two way communication system is described wherein a base unit can transfer information with remotely-located unit such as a portable infrared communicator. The base unit produces carrier frequency signals to a plurality of distributed transmitter modules which expose different areas to infrared transmissions. A plurality of down-link or base unit associated infrared detection modules are distributed to receive infrared carrier frequency communications from one or more remote or portable units and convert these to electrical signals at the same carrier frequencies. The latter electrical signals are delivered to the base unit through a common cable. This cable also serves to deliver electrical power to the base unit to the latter modules. The electrical carrier frequency signals are combined at the base unit which uses this to provide the base unit with the information detected from the remote unit and produce a signal representative of the detected infrared energy. The latter signal may then be used to control the output power from the remote or portable units.
113 Citations
16 Claims
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1. An infrared communication sensor for detecting modulated infrared carrier radiation, comprising:
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infrared detecting means for generating an electrical signal in response to modulated incident infrared radiation and representative of the modulation thereof; an infrared transparent cover located over the infrared detecting means, and an infrared transparent Faraday shield located between the incident infrared radiation and the infrared detecting means and spaced therefrom to shield the latter against extraneous electric fields. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An infrared communication sensor for detecting modulated infrared carrier radiation, comprising:
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a plurality of photodetectors; an infrared transparent lens element having an externally curved surface to gather infrared light, said lens element being positioned to overly the photodetectors so as to effectively enlarge their optical viewing angle; and an infrared coupling material interposed between the photodetectors and the lens element to couple infrared light passing therethrough to the photodetectors and affix to the lens element. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification