Scanning method and system for a multiple light beam system

Details Scanning method and system for a multiple light beam system Scanning method and system for a multiple light beam system

2011-06-14

2011-06-14

Ko, Tony (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S222100

Reexamination Certificate

active

07960681

ABSTRACT:
A method and system for scanning a multiple light beam system, such as a safety light curtain, uses a plurality of transmission signals including two or more synchronization signals for synchronizing a beam receiver module with a beam transmission module. The system has transmitter circuitry which generates the transmission signals for driving light sources of the transmission module and receiver circuitry which receives corresponding transmitted signals. The receiver circuitry generates a scanning initialization signal using an uninterrupted synchronization signal among the reception signals for synchronizing the receiver module with the transmission module and scans the receiver module in response to generation of the scanning initialization signal.

REFERENCES:
patent: 6167991 (2001-01-01), Full et al.
patent: 6779760 (2004-08-01), Chang et al.
patent: 6872932 (2005-03-01), Emmanuel
patent: 7126144 (2006-10-01), De Coi
patent: 2005/0211883 (2005-09-01), Lohmann

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