The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 09, 1993
Filed:
Dec. 05, 1991
Andrew J Barker, Orpington, GB;
Ometron Limited, London, GB;
Abstract
Apparatus for measuring the shape of a remote surface (10) comprises a laser (2) whose beam is split into a measuring beam (4) and reference beam (5). The reference beam is passed through a path length modulating mechanism (13, 14) to a datum point (18) while the measuring beam (4) is passed to a point (9) on the remote surface. The reflected beams return along the same paths and are combined at beam splitter (6). The interferometric pattern in the combined beams is analysed to determine the path length of the measuring beam while the transverse coordinates of the point (9) are determined from the position of a beam directing mechanism (12). This process is repeated for a number of points on the surface to measure the shape of the surface (10).