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:
Jan. 24, 2017
Filed:
Sep. 04, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Jun Kawamura, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
There is provided an eyepiece lens which has a long length from an image display surface to a first lens, a high observation magnification, and a large apparent field of view. An eyepiece lens used to observe an image displayed on the image display surface includes a first lens with a positive refractive power, a second lens with a negative refractive power, and a third lens with a positive refractive power sequentially from the image display surface side to the observation side. The lens surface of the first lens on the image display surface side has a convex shape on the image display surface side. The lens surface of the second lens on the observation side has a concave shape on the observation side. The focal length of the eyepiece lens, the focal length of the lens surface, and the focal length of the lens surface are set appropriately.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile