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. 06, 2020
Filed:
Feb. 28, 2020
Nikon Corporation, Minato-ku, Tokyo, JP;
Yosuke Okudaira, Konosu, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An ophthalmic lens to be attached in or near an eyeball includes a first region that is near an optical axis; a second region that is farther from the optical axis than the first region; and a third region that is farther from the optical axis than the second region, the first region applies a first phase difference of 3 rad or more of a third phase difference with respect to the third region; the second region applies a second phase difference continuously connecting phase differences of the first region and the third region, and continuously changing in accordance with a distance from the optical axis; and the third region applies the third phase difference varying in accordance with the distance from the optical axis around a reference value, wherein a variation amplitude of the third phase difference is not less than 0.1 rad and less than the first phase difference.