Patent ID: 6202314
Filing Date: 2001-03-20
Classification: G01B,G01C

Abstract:
A measuring system comprising:an optical siting reference;a calibrated scale for comparison to the optical siting reference, the calibrated scale including:a first stepped section which includes:a first long reference member which has a first length; anda first short reference member which is adjacent to the first long reference member along a first adjacent side of the first long reference member and which has a second length which in turn is substantially less than the first length so as to expose a significant portion of the first adjacent side of the first long reference member;a second stepped section which includes:a second long reference member which has the first length; anda second short reference member which is adjacent to the second long reference member along a second adjacent side of the second long reference member and which has the second length so as to expose a significant portion of the second adjacent side of the second long reference member;wherein arrangement of the first long and short reference members of the first stepped section relative to one another is different than arrangement of the second long and short reference members of the second stepped section relative to one another;wherein measurement is determined according to alignment of the optical siting reference with edges of reference members of the calibrated scale.