05724264 is referenced by 276 patents and cites 121 patents.

A method and apparatus for measuring three-dimensional (3-D) coordinates. A 3-D object can be digitized into a mesh representation manipulable by a computer system by tracing a stylus of a probe apparatus over surfaces of the object. The probe apparatus includes an arm having a series of linkages and joints. The arm can be assembled by placing the joints of the arm in joint fixtures a desired distance and angle apart and bonding the joints to a linkage. The probe apparatus is calibrated by placing the tip of the stylus at an arbitrary point in a work volume and varying the stylus' orientation to find error values and determine calibration parameters. The sensors of the probe apparatus are zeroed by placing the probe apparatus in the only possible home position and assigning assumed starting angles to the sensors. A rotary table can be used to support the object being digitized, where the rotation of the rotary table and object during digitization is sensed and included in coordinate calculations. A mesh representation of the object is developed by a computer system by incrementally creating and displaying triangles from data points of contour lines of the mesh. A selection template allows commands to be selected by the stylus by defining a template having selection areas within the probe's work volume and associating the selection areas with specific commands to the host computer.

Title
Method and apparatus for tracking the position and orientation of a stylus and for digitizing a 3-D object
Application Number
92974
Publication Number
5724264
Application Date
August 7, 1995
Publication Date
March 3, 1998
Inventor
Bernard G Jackson
Atherton
CA, US
Bruce M Schena
Menlo Park
CA, US
Louis B Rosenberg
Pleasanton
CA, US
Agent
Hickman Beyer & Weaver
Assignee
Immersion Human Interface
CA, US
IPC
G01B 7/008
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