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:
Jun. 06, 2000
Filed:
Oct. 29, 1998
Fritz R Kruis, Tulsa, OK (US);
Gerber Coburn Optical, Inc., South Windsor, CT (US);
Abstract
A calibration gauge for use in calibrating a lens cutting/grinding machine has a disk with a concentric post on one of its faces for chucking the disk to a lens spindle. A target delineated on the other face of the disk consists of bands aligned on the X and Y axes and intersecting at the center of the disk. The width of the bands is not greater than the acceptable error in positioning of the X and Y axes. The calibrating operator sets a limit of Z-axis motion of the lens spindle corresponding to a selected depth of cutting/grinding a lens. The gauge is chucked to the lens spindle. The X-axis position of the tool is aligned by computer with the Z-axis. Rotation of the tool spindle is initiated and the lens spindle is raised to plunge cut/grind the gauge. The lens spindle is lowered and rotation of the tool spindle is terminated. The gauge is dechucked and the depth of the cut/grind is measured. The difference between the measured and selected depths is determined. The Z-axis calibration of the lens spindle is jockeyed by use of the computer to compensate for the difference. The operator also observes the quadrant position of the cut/grind center on the gauge to determine its displacement from center. The X-axis calibration of the tool is then jockeyed by use of the computer to compensate for X-axis displacement and the Y-axis calibration of the tool is manually adjusted to compensate for the Y-axis displacement.