Accession Number:

AD0650087

Title:

A COMPARATOR CALIBRATION METHOD

Descriptive Note:

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1967-01-01

Pagination or Media Count:

33.0

Abstract:

A method is described for calibrating precision comparators by using grid plates which have been calibrated by means of a triangulation method based exclusively on distance measurements. The method used for calibrating the grid plate provides measurements of the x, y coordinates for selected grid intersections to an accuracy better than plus or minus 1 micron. Using calibrated grid plates, the comparator may be calibrated to determine instrument constants such as 1 Overall scalers of the measuring screws. 2 Non- orthogonality between the x and y movements. 3 Translation and rotation between grid and comparator coordinate systems. The results of a number of calibrations are shown.

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE