Patent ID: 7194209
Filing Date: 2007-03-20
Classification: H04B

Abstract:
1. An interference resistant infrared extension system comprising: one or more infrared photodetectors configured to detect impinging infrared light having a signal frequency modulated by data; an amplifier in electrical communication with said one or more IR photodetectors, wherein said amplifier is tuned to amplify electrical signals generated by said one or more IR photodetectors; one or more infrared light emitters in electrical communication with said amplifier, wherein in said one or more infrared light emitters are configured to emit infrared light in response to electrical signals from said amplifier; and an infrared bandpass filter configured to filter light impinging on said one or more IR photodetectors, wherein said infrared bandpass filter is configured to have a center wavelength falling within the range of about 920 nm to about 980 nm; an 80 percent bandwidth of approximately 10 nm; and a 50 percent bandwidth of approximately 20 nm.