Position indicator

Optics: measuring and testing – By polarized light examination – With light attenuation

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

356375, 356376, 356385, 356386, 356387, G01B 1114

Patent

active

055859240

ABSTRACT:
A device for producing an electric signal which corresponds to the position of an object which is movable in translation or rotation relative to a base, wherein by optical scanning of markings which periodically recur upon a movement of the object, analog voltage signals A, A and B, B are produced by means of sensors which are spaced apart from each other by one-quarter of the scanning period. The signals are converted in an evaluation circuit with comparators into digital forms of the signals A and B (quadrature signal). In order to produce a test signal S, there is also provided in the device a summation circuit by means of which the voltage signals A, A and B, B are added and compared in a comparator with a threshold value.

REFERENCES:
patent: 4979827 (1990-12-01), Matsui
patent: 5237391 (1993-08-01), Huggins
patent: 5438416 (1995-08-01), Nater

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Position indicator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Position indicator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Position indicator will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1996108

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.