Methods and systems for detecting proximity of an object

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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Reexamination Certificate

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11347711

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.

REFERENCES:
patent: 3143588 (1964-08-01), Donald et al.
patent: 4251291 (1981-02-01), Gomez
patent: 4976543 (1990-12-01), Scheck et al.
patent: 5677529 (1997-10-01), Hofmann et al.
patent: 6184782 (2001-02-01), Oda et al.
patent: 6324008 (2001-11-01), Baldwin et al.
patent: 6470273 (2002-10-01), Halsted et al.
patent: 6820897 (2004-11-01), Breed et al.
patent: 7115871 (2006-10-01), Tracy et al.
patent: 2002/0140215 (2002-10-01), Breed et al.
patent: 2004/0058488 (2004-03-01), Arno
patent: 2004/0075544 (2004-04-01), Janssen
patent: 2006/0067378 (2006-03-01), Rege et al.

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