Method of measuring a minute displacement

Details Method of measuring a minute displacement Method of measuring a minute displacement

1992-06-26

1994-05-24

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With light attenuation

73105, 356376, G01B 734, G01B 1130

Patent

active

053153731

ABSTRACT:
A method for detecting a minute displacement of a probe includes an emission from a light source of two light beams having different polarizing directions. The light beams are subsequently diverged by a first lens so as to pass through a beam splitter towards a separating prism. The light beams having passed through the prism are separated into first and second measuring beams which are subsequently focused by a second lens on first and second, spaced reflecting surfaces. The first and second measuring beams are then reflected by the first and second reflecting surfaces, respectively, so as to enter respective photodetectors after having passed through the separating prism, the beam splitter and a polarizing beam splitter for passing therethrough the first and second measuring beams or reflecting them depending on the polarizing direction of the incoming light. The first and second photodetectors outputs respective signals indicative of the associated positions of foci which are then processed by a signal processing circuit to provide an indication of the minute displacement of the probe.

REFERENCES:
patent: 4017188 (1977-04-01), Sawatari
patent: 5067817 (1991-11-01), Glenn

Affiliated with

Also associated with

Rating

Method of measuring a minute displacement 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 of measuring a minute displacement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring a minute displacement will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1976815