Optics: measuring and testing – Angle measuring or angular axial alignment
Reexamination Certificate
2006-08-08
2006-08-08
Toatley, Jr., Gregory J. (Department: 2877)
Optics: measuring and testing
Angle measuring or angular axial alignment
Reexamination Certificate
active
07088440
ABSTRACT:
A method and apparatus for determining a pose of an elongate object and an absolute position of its tip while the tip is in contact with a plane surface having invariant features. The surface and features are illuminated with a probe radiation and a scattered portion, e.g., the back-scattered portion, of the probe radiation returning from the plane surface and the feature to the elongate object at an angle τ with respect to an axis of the object is detected. The pose is derived from a response of the scattered portion to the surface and the features and the absolute position of the tip on the surface is obtained from the pose and knowledge about the feature. The probe radiation can be directed from the object to the surface at an angle σ to the axis of the object in the form of a scan beam. The scan beam can be made to follow a scan pattern with the aid of a scanning arrangement with one or more arms and one or more uniaxial or biaxial scanners. Angle τ can also be varied, e.g., with the aid of a separate or the same scanning arrangement as used to direct probe radiation to the surface. The object can be a pointer, a robotic arm, a cane or a jotting implement such as a pen, and the features can be edges, micro-structure or macro-structure belonging to, deposited on or attached to the surface which the tip of the object is contacting.
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Buermann Dale H.
Carl Stewart R.
Gonzalez-Banos Hector H.
Mandella Michael J.
Zhang Guanghua G.
Akanbi Isiaka O.
Electronic Scripting Products, Inc.
Lumen Intellectual Property Services Inc.
Toatley , Jr. Gregory J.
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