One-way optical highway communication system

Details One-way optical highway communication system One-way optical highway communication system

1996-07-18

1998-03-31

Hofsass, Jeffery

Communications: electrical

Vehicle detectors

Photoelectric

340937, 340928, 340556, G08G 104

Patent

active

057343438

ABSTRACT:
A one-way optical communication system adapted for vehicular use. A light-readable indicia (35) is embedded in a window or mounted on an exterior portion of a moving motor vehicle (10). The indicia (15) is transparent to visible light and is reflective to infrared or ultraviolet light, making it generally invisible to the unaided human eye. A beam (30) of infrared or ultraviolet light located in a fixed position remote from the moving vehicle illuminates the indicia and portions of the beam are reflected from the illuminated indicia in a representative pattern. The reflected beam is detected by a fixed sensor (25), which provides an electrical signal. The signal is analyzed to determine the identity of the motor vehicle.

REFERENCES:
patent: 3324301 (1967-06-01), Goldberg
patent: 3633158 (1972-01-01), Heibel
patent: 4368979 (1983-01-01), Ruell
patent: 4970389 (1990-11-01), Danforth et al.
patent: 5004908 (1991-04-01), Nakamura
patent: 5541762 (1996-07-01), Levy

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