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. 04, 2025
Filed:
Aug. 09, 2022
Olympus Corporation, Hachioji, JP;
Tsutomu Igarashi, Hachioji, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
There is provided an objective optical system that is easy to produce, capable of forming optical images that can be observed without difficulties while small in size. The objective optical system includes, in order from the object side, a flat plate OP, an aperture stop S, and a substantially hemispherical planoconvex lens Lhaving an outer diameter substantially equal to the outer diameter of the flat plate. The flat plate and the planoconvex lens Lare cemented together with the aperture stop between. The objective optical system satisfies the following conditional expressions (1), (2), and (3):0.3<<0.45 (1)1.7<1+/(2×)<2.1 (2)0.9</(1+/(2×))<1.1 (3).