Method and apparatus for optically measuring absolute...

Details Method and apparatus for optically measuring absolute... Method and apparatus for optically measuring absolute...

2007-09-11

2007-09-11

Toatley, Jr., Gregory J. (Department: 2886)

Optics: measuring and testing

By polarized light examination

C250S225000

Reexamination Certificate

active

10897503

ABSTRACT:
A method and apparatus using two sets of polarized light detection systems are disclosed for optically measuring absolute displacement. In the first detection system a step motor is controlled to drive an analyzer to trace synchronously the displacement being measured by comparison of the magnitude of the intensity of two orthogonal light beams and then the number of control pulses from the step motor becomes a value of the displacement measured; and by comparison with the magnitude the intensity of a plurality of light beams with phase difference from a plurality of light paths in the second polarized light detection system the section of system operation is ascertain and consequently the absolute displacement is detected and measured.

REFERENCES:
patent: 3474255 (1969-10-01), White
patent: 2003/0095257 (2003-05-01), Wijntjes et al.
patent: ZL98106753.0 (1998-03-01), None
Li, W., “Research on the Principle and Method of Polarized Light Displacement Sensor,” Chinese Journal of Scientific Instrument, vol. 20, No. 3 (Jun. 1999).

Affiliated with

Also associated with

Rating

Method and apparatus for optically measuring absolute... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for optically measuring absolute..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for optically measuring absolute... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3720964