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:
Feb. 12, 2019
Filed:
Oct. 09, 2015
Hoya Lens Thailand Ltd., Thanyaburi, Patumthani, TH;
Kazuma Kozu, Tokyo, JP;
Takao Tanaka, Tokyo, JP;
HOYA LENS THAILAND LTD., Patumthani, TH;
Abstract
Progressive power lens including: object side surface; eyeball side surface; and at least a near portion having a power for near vision, wherein object side surface includes power change in vertical direction of lens having progressive refractive power function, eyeball side surface includes power change in horizontal direction of lens having progressive refractive power function, when surface refractive power in the horizontal direction is defined as DHn and surface refractive power in vertical direction is defined as DVn in near power measurement point N in object side surface, relational expression of DHn<DVn is fulfilled, and near portion of eyeball side surface has a shaped part wherein signs of positive and negative of surface refractive power in vertical direction of lens and surface refractive power in horizontal direction of lens are opposite to each other.