Systems and methods for absolute positioning using repeated...

Details Systems and methods for absolute positioning using repeated... Systems and methods for absolute positioning using repeated...

2005-08-30

2005-08-30

Lauchman, Layla (Department: 2877)

Optics: measuring and testing

Position or displacement

Position transverse to viewing axis

C356S614000, C250S231130, C382S278000

Reexamination Certificate

active

06937349

ABSTRACT:
An absolute 2D position-sensing device is usable to measure the position of a first element with respect to a second element. A 2D absolute scale includes an integrated 2D absolute scale pattern extending over the 2D scale area along each measuring axis of the scale. The integrated 2D absolute scale pattern includes a predetermined quasi-random pattern repeatedly interleaved with a plurality of code portions along each axis. Each code portion includes a plurality of code elements indicative of an absolute measurement value. The offset of the quasi-random pattern relative to a readhead of the device is combined with the absolute measurement value to determine an absolute position to a very high resolution over a relatively large 2D range.

REFERENCES:
patent: 4967093 (1990-10-01), Takemori
patent: 5104225 (1992-04-01), Masreliez
patent: 5198869 (1993-03-01), Monteverde et al.
patent: 6642506 (2003-11-01), Nahum et al.
patent: 6677948 (2004-01-01), Wasserman et al.
patent: 6781694 (2004-08-01), Nahum et al.
patent: 6873422 (2005-03-01), Nahum et al.
patent: 1 099 936 (2001-05-01), None
patent: 1 382 940 (2004-01-01), None

Affiliated with

Also associated with

Rating

Systems and methods for absolute positioning using repeated... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Systems and methods for absolute positioning using repeated..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for absolute positioning using repeated... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3523512