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:
Sep. 11, 2018
Filed:
Apr. 24, 2017
Applicant:
Olympus Corporation, Hachioji-shi, Tokyo, JP;
Inventors:
Masaru Morooka, Akishima, JP;
Kenichi Nagasawa, Hachioji, JP;
Assignee:
OLYMPUS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/34 (2006.01); G02B 15/22 (2006.01); A61B 1/00 (2006.01); A61B 1/005 (2006.01); A61B 1/04 (2006.01); G01J 1/08 (2006.01); G02B 21/24 (2006.01); G02B 21/36 (2006.01); G02B 23/24 (2006.01); G03B 21/14 (2006.01); H04N 5/225 (2006.01); H04N 5/232 (2006.01); G02B 15/177 (2006.01); G03B 33/12 (2006.01); H04N 9/31 (2006.01);
U.S. Cl.
CPC ...
G02B 15/22 (2013.01); A61B 1/005 (2013.01); A61B 1/00039 (2013.01); A61B 1/00112 (2013.01); A61B 1/00188 (2013.01); A61B 1/04 (2013.01); G01J 1/08 (2013.01); G02B 15/177 (2013.01); G02B 21/241 (2013.01); G02B 21/361 (2013.01); G02B 23/2438 (2013.01); G02B 23/2469 (2013.01); G03B 21/142 (2013.01); H04N 5/2254 (2013.01); H04N 5/2256 (2013.01); H04N 5/23293 (2013.01); G03B 33/12 (2013.01); H04N 9/3141 (2013.01); H04N 2005/2255 (2013.01);
Abstract
A single focal length lens includes an aperture stop and first through fourth lens units having, respectively, negative refractive power, positive refractive power, negative refractive power, and positive refractive power. Positions of the first, second, and fourth lens units are fixed. When focusing from an object at infinity to an object at a short distance, the third lens unit moves toward the image side. Conditional expressions (1), (2), and (3) are satisfied:−5<1/0.5  (1),−10<3/1  (2), and0.5<12/<1  (3),