for measuring distance or clearance between spaced objects or spaced apertures

Introduced: September 1968

Last revised: January 2006

Full Title

Measuring arrangements characterised by the use of optical techniques > for measuring distance or clearance between spaced objects or spaced apertures

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS