Laser length measuring instrument

Details Laser length measuring instrument Laser length measuring instrument

1990-06-05

1992-06-23

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

G01B 1102

Patent

active

051237423

ABSTRACT:
A laser length measuring instrument in which a first and a second sinusoidal wave interference signals differing in phase by .pi./2 are generated from a plurality of interference wave signals received from an interferometer; a plurality of third sinusoidal wave interference signals differing in phase by m.pi./2 n (where n=integer 2 or greater; m=positive integer sequentially selected from among 0<m.pi./2n<.pi.) with respect to the first sinusoidal wave interference signal are generated out of the first and the second sinusoidal wave interference signals in a phase difference signal generating circuit; a signal indicating the polarity inversion of each sinusoidal wave interference signal is generated, out of the plurality of third sinusoidal wave interference signals generated therein, and the first and the second sinusoidal wave interference signals, utilizes a polarity inversion signal generating circuit to render the signal indicating the polarity inversion corresponding to either first or second sinusoidal wave interference signal into a first measuring signal, and the signal indicating a plurality of polarity inversions respectively corresponding to the plurality of third sinusoidal wave interference signals, and the first and the second sinusoidal wave interference signals into a second measuring signal. The two kinds of measuring signals are combined for measuring purposes to suppress the accumulation of errors affecting the results of measurement in order to obtain accurate, high-resolution displacement measuring data which is hardly affected by signal detection errors on the whole.

REFERENCES:
patent: 4881815 (1989-11-01), Sommargren

Affiliated with

Also associated with

Rating

Laser length measuring instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-928977