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. 03, 1998
Filed:
Sep. 19, 1996
Albert G Choate, Rush, NY (US);
Optical Gaging Products, Inc., Rochester, NY (US);
Abstract
Two stereoscopic images of the surface of an inspected object are projected by two different lens systems to two separate video cameras for recording thereby and for display via a CPU on a 3D monitor. The optical axes of the two lens systems are equiangularly spaced from a central Z axis extending normal to the object plane, so that the height of a feature on the surface of the workpice may be calculated by determining the difference in the amount of lateral offset in the X direction from the center of a displayed image of a given feature as shown in one of the displayed images from the amount of its corresponding lateral offset in the other image, and then calculating Z in accordance with the formula Z=the difference in the offset in the X direction divided by twice the tangent of the angle of inclination of a respective viewing axis relative to the Z axis. Alternatively, the two images may be superimposed to form a stereoscopic image, and the two lens systems are shifted on the Z axis until the slight offset images of the feature coincide.