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:
Jan. 04, 2011
Filed:
Dec. 20, 2006
Hideo Toriumi, Tokyo, JP;
Shigeru Takizawa, Tokyo, JP;
Hideo Toriumi, Tokyo, JP;
Shigeru Takizawa, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
A lens surface cutting method for a spectacle lens includes the steps of calculating the mean curvature of a lens surface () to be machined, calculating a helical machining path () that matches the mean curvature, and cutting the lens surface () to be machined by a cutting means. The helical machining path () calculated by the helical machining path calculating step is a path in which helix spacings P (=P, P, . . . P) on the lens surface () to be machined are equidistant and a helix spacing d (=d, d, . . . d) on an X-Y projection planeincreases continuously from a lens outer periphery toward a center. The cutting means cuts the lens surface () to be machined from the outer periphery toward the center along the helical machining path (). Thus, a spectacle lens having a lens surface with a surface accuracy that is almost uniform throughout an entire surface can be obtained.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile