Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-10-10
2006-10-10
Allen, Stephone B. (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C250S208100, C345S163000, C345S165000
Reexamination Certificate
active
07119323
ABSTRACT:
An optical navigation system. The optical navigation system includes an image sensor capable of optical coupling to a surface of an object, a data storage device, and a navigation circuit. The data storage device is capable of storing successive images captured by the image sensor. The navigation circuit includes a first digital circuit capable of determining an optical displacement estimate for a relative displacement between the image sensor and the object obtained by comparing the images, a second digital circuit capable of determining a mechanical displacement estimate for the relative displacement obtained from consideration of a mechanical characteristic associated with the optical navigation system, and a third digital circuit capable of determining an adjusted displacement estimate obtained from the optical displacement estimate and the mechanical displacement estimate.
REFERENCES:
patent: 6433780 (2002-08-01), Gordon et al.
patent: 6525306 (2003-02-01), Bohn
Brosnan Michael J.
Xie Tong
Allen Stephone B.
Avago Technologies ECBU (IP) Singapore Pte. Ltd.
Lee Patrick J.
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