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. 07, 2020
Filed:
Nov. 22, 2016
Applicant:
Mitaka Kohki Co., Ltd., Tokyo, JP;
Inventor:
Katsuyuki Nakamura, Tokyo, JP;
Assignee:
MITAKA KOHKI CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 21/00 (2006.01); H04N 13/239 (2018.01); G02B 21/02 (2006.01); G02B 21/22 (2006.01); G02B 21/24 (2006.01); G02B 21/36 (2006.01);
U.S. Cl.
CPC ...
G02B 21/0012 (2013.01); G02B 21/025 (2013.01); G02B 21/22 (2013.01); G02B 21/241 (2013.01); G02B 21/368 (2013.01); H04N 13/239 (2018.05);
Abstract
A surgical stereoscopic observation apparatus includes an objective optical system having an optical axis and emits two focusing beams in parallel with the optical axis toward the objective optical system. If a focal point of the objective optical system agrees with a surgical field, the two focusing beams converge to a single spot on the surgical field, and if disagrees with the surgical field, form two spots on the surgical field. According to the state of the spots, it is possible to quickly determine with naked eye or on a monitor whether or not the focal point is on the surgical field.