US 7,321,732 B2 | ||
Method and apparatus for improving noise immunity for low intensity optical communication | ||
Jurgis Astrauskas, Saint Charles, Ill. (US) | ||
Assigned to Emerson Electric Co., St. Louis, Mo. (US) | ||
Filed on Jul. 28, 2003, as Appl. No. 10/628,765. | ||
Prior Publication US 2005/0025494 A1, Feb. 03, 2005 | ||
Int. Cl. H04B 10/00 (2006.01) |
U.S. Cl. 398—138 [398/130; 398/164] | 9 Claims |
1. A probe for bi-directional optical communication with a device external to the probe, the probe comprising:
a housing;
an optical transmitter mounted within the housing that generates a light signal having a logical polarity that is the opposite
of the logical polarity of the light signal generated by an indicator light associated with an external device with which
the communication probe is communicating; and
an optical receiver mounted within the housing for receiving the light signal generated by the indicator light and generating
an electrical data signal from the received light signal.
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