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:
Jul. 27, 2010
Filed:
Aug. 07, 2007
Tadashi Kaga, Minowa-machi, JP;
Tadashi Kaga, Minowa-machi, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A spectacle lens design method for designing a spectacle lens, including setting a distance portion, a near portion, and a progressive portion which is disposed between the distance portion and the near portion; adding astigmatic power for canceling aberration produced by a bend angle of the spectacle frame; determining an aspherical surface addition quantity; and adding prismatic power for canceling prismatic power produced by the bend angle of the spectacle frame at the design reference point of the distance portion to the entire distance portion and prismatic power for cancelling prismatic produced by the bend angle of the spectacle frame at the design reference point of the near portion to the entire near portion on either the object side refractive surface or the eyeball side refractive surface of the spectacle lens.