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:
Aug. 11, 2026
Filed:
Jan. 28, 2019
Nikon Corporation, Tokyo, JP;
Hidetsugu Takagi, Yokohama, JP;
NIKON CORPORATION, Tokyo, JP;
Abstract
An ocular optical system (EL) comprises: a first Fresnel lens (first lens (L)) having a first Fresnel surface (FSa) formed on the lens surface on the image display unit () side; and a second Fresnel lens (second lens (L)) placed closer to the image display unit () than the first Fresnel lens and having a second Fresnel surface (FSb) formed on the lens surface on the image display unit () side. In a plurality of wall surfaces constituting the first Fresnel surface (FSa) and the second Fresnel surface (FSb) within the radii of at least 10 mm from the optical axes for the first Fresnel surface (FSa) and the second Fresnel surface (FSb), the tilt angle of a wall surface in the first Fresnel surface (FSa) relative to the optical axis for the wall surface is greater than the tilt angle of a wall surface in the second Fresnel surface (FSb) relative to the optical axis for the wall surface, for the wall surfaces that are in the same order from the optical axes for the first and the second Fresnel surfaces.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile