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:
Mar. 20, 1990
Filed:
Sep. 12, 1988
Edgar L Field, Jr, Muskogee, OK (US);
Joe D Stith, Muskogee, OK (US);
Phillip D Hill, Muskogee, OK (US);
Coburn Optical Industries, Inc., Muskogee, OK (US);
Abstract
A method and system for generating a lens by grinding a lens blank with a tool in a working position calls for a diamond tool to be disposed only angularly, the lens being moved in an X,Y relationship so that the relative cutting position is properly maintained. The angular disposition and X,Y relationship of the tool and the lens are pre-calculated by a computer, and the digital data thus obtained are converted to analog data for controlling a servo system. In accordance with the invention, when a certain range of curves is entered via a digital keyboard, a computation is made by computer to determine if an interference between the spindle holding the diamond tool and lens will exist, or if an interference between the lens and a chuck will exist. If an interference will exist, the chucked lens is caused to rotate around the optic axis by precisely 180.degree., the lens is generated halfway through, the chucked lens is then retracted a small amount to provide clearance, and the chucked lens is then returned to its original position so that the second half of the lens may be generated. Other features include a linear position detection circuit for detecting the linear position of the chucked lens and an initiation circuit for initiating rotation of the chucked lens.