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:
Oct. 22, 2024
Filed:
Sep. 27, 2019
Hoya Lens Thailand Ltd., Pathumthani, TH;
Tadashi Kaga, Tokyo, JP;
HOYA LENS THAILAND LTD., Pathumthani, TH;
Abstract
A design system of a progressive addition lens including a near portion for viewing a near distance, a distance portion for viewing a distance farther than the near distance, and an intermediate portion provided between the near portion and the distance portion and having a progressive refraction function, the design system of a progressive addition lens includes an aberration amount setting unit that sets an amount of transmission astigmatism Δ[D] added to a progressive addition lens in such a way that when a wearer of the progressive addition lens α to which transmission astigmatism of an aberration amount Δ[D] is added is provided with the progressive addition lens β having different parameters, visual performance when the progressive addition lens β is worn approaches visual performance when the progressive addition lens α is worn.