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. 17, 2026
Filed:
Aug. 21, 2020
Applicant:
Nikon Corporation, Tokyo, JP;
Inventor:
Masahiro Mizuta, Yokohama, JP;
Assignee:
NIKON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02C 7/02 (2006.01); A61B 3/10 (2006.01); A61B 3/12 (2006.01); G02B 5/08 (2006.01); G02B 17/00 (2006.01);
U.S. Cl.
CPC ...
G02C 7/022 (2013.01); A61B 3/12 (2013.01); G02B 17/006 (2013.01); A61B 3/102 (2013.01); G02B 5/08 (2013.01);
Abstract
An optical system is capable observing a peripheral field away from a visual axis and includes a reflection mirror unit forming an image of an examined eye with two concave mirrors in an opposing arrangement facing each other at the examined eye side, this being the upstream side, of a first optical unit and a second optical unit. In the reflection unit there is a conjugate relationship between one focal point thereof and another focal point thereof. By forming an image of the examined eye using the reflection unit a distance can be secured between the examined eye and the optical system and a wide range of the examined eye can be observed.