Method and apparatus for improving the accuracy of laser range f

Details Method and apparatus for improving the accuracy of laser range f Method and apparatus for improving the accuracy of laser range f

1997-12-08

1999-09-14

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 401, G01C 308

Patent

active

059531096

ABSTRACT:
A method and apparatus for improving the accuracy of laser ranging finding. The time difference obtained from laser range finding is converted into a voltage signal by a linear charge circuit with constant current and then digitized into a digital value by an analog to digital converter. A self calibration method is used to compensate for the thermal effect in a user's environment and improve the precision of the distance measurement obtained from the laser range finder. The self calibration method includes measuring two voltage values by using two correction pulses with known width after the laser range finder is initialized. The standard values in response to the two correction pulses are used to calibrate the measured data for obtaining a correction gain and a correction level. An instant distance value measured from a target can be calibrated by the correction gain and level to achieve higher precision of range finding.

REFERENCES:
patent: 4770526 (1988-09-01), Manhart et al.
patent: 4827317 (1989-05-01), Mizushima et al.
patent: 4888477 (1989-12-01), Nankivil
patent: 5046839 (1991-09-01), Krangle
patent: 5157403 (1992-10-01), Urkowitz
patent: 5221956 (1993-06-01), Patterson et al.
patent: 5359404 (1994-10-01), Dunne
patent: 5612779 (1997-03-01), Dunne
patent: 5633706 (1997-05-01), Cho et al.
patent: 5652651 (1997-07-01), Dunne
patent: 5719664 (1998-02-01), Besesty et al.

Affiliated with

Also associated with

Rating

Method and apparatus for improving the accuracy of laser range f 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 improving the accuracy of laser range f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for improving the accuracy of laser range f will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1515191