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. 14, 2011
Filed:
Jul. 18, 2007
Mitsuhiro Yanari, Tokyo, JP;
Mitsuhiro Yanari, Tokyo, JP;
Nikon-Essilor Co., Ltd., Tokyo, JP;
Abstract
A subject matter is to provide an efficient method for designing a progressive refraction lens in consideration of not only its optical performance but also its appearance performance. The method for designing the progressive refraction lens includes a step (S) for determining addition power of an entire lens that is a summation of addition power of a front surface and that of a back surface and a step (S) for determining the addition power of the front surface. The method for designing the progressive refraction lens is characterized in determining to make the addition power of the front surface not less than 0 but smaller than that of the entire lens in the case that the appearance performance is considered to be more important than the optical performance while determining to make the addition power of the front surface larger than that of the entire lens in the case that the optical performance is considered to be more important than the appearance performance.