Methods and systems for detecting proximity of an object

Details Methods and systems for detecting proximity of an object Methods and systems for detecting proximity of an object

2006-02-03

2008-03-25

Epps, Georgia (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

Reexamination Certificate

active

07348538

ABSTRACT:
Methods and systems for detecting a proximity of an object are provided. The method includes receiving a first beam of radiation from a first field of view directed onto a first detector and a second beam of radiation from a second field of view directed onto a second detector wherein the second beam is angularly displaced from the first beam by a predetermined amount, generating a first output signal from the first detector correlative to the energy received from the first beam and a second output signal from the second detector correlative to the energy received from the second beam, and outputting a proximity signal indicative of the proximity of an object when a differential between the first and second output signals exceeds a predetermined threshold.

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