Method of determining a dimension of an article
AssigneeCentre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie
InventorRobert A. Pirlet
Life of this patent
Estimating the term…
Abstract
To determine a dimension of an article, a beam is directed at the article by means of a first mobile deflector so as to scan the part of the profile of the article comprising the dimension to be measured. Rays reflected by the article are orientated in the direction of at least one receiver by means of a second mobile deflector. The deflectors are angularly moved at different speeds. The positions occupied by two points related with the dimension are determined. The dimension is calculated with respect to these points.
Claims3
A method of determining a dimension of an article, comprising directing a beam at the article by means of a first mobile deflector and scanning the part of the profile of the article comprising the dimension to be measured, orientating rays reflected by the article in the direction of at least one receiver by means of a second mobile deflector, angularly moving the deflectors at different speeds, determining the positions occupied by two points related with the dimension to be measured, and calculating the dimension with respect to these points;
- wherein during the time taken by one of said deflectors to scan one of the various parts of the profile of the article, the other one of said deflectors completely scans all of the said various parts of the profile of the article, the optical members being arranged one with respect to the other in such a way that the rays reflected by one of the various parts of the profile of the article remain substantially at the same abscissa of the receiver during scanning of the said part of the profile.
Dependencies are inferred from the claim text.