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. 02, 2024
Filed:
Sep. 02, 2020
Applicant:
Olympus Corporation, Hachioji, JP;
Inventor:
Hiroshi Tsuyuki, Hachioji, JP;
Assignee:
OLYMPUS CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 17/04 (2006.01); A61B 1/00 (2006.01); A61B 1/05 (2006.01); G02B 27/28 (2006.01); G02B 23/24 (2006.01); A61B 1/06 (2006.01);
U.S. Cl.
CPC ...
A61B 1/00096 (2013.01); A61B 1/000095 (2022.02); A61B 1/05 (2013.01); A61B 1/0655 (2022.02); G02B 23/2407 (2013.01); G02B 23/2484 (2013.01); G02B 27/283 (2013.01);
Abstract
An optical system includes in order from an object side, an objective optical system, a λ/4 wavelength plate including one birefringent material, a polarizing beam splitter which splits light from the objective optical system into two, and an image sensor which picks up two images split. The polarizing beam splitter causes to occur an axial astigmatism of an opposite sign with respect to an axial astigmatism occurred due to the λ/4 wavelength plate, the following conditional expression (1) is satisfied.1.1≤/(|)≤49 (1)