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:
Jun. 08, 2021
Filed:
Jun. 06, 2018
Olympus Corporation, Hachioji, JP;
Hirokazu Konishi, Tokyo, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
An observation deviceincludes an objective, camera, an observation scope changing device, and a control device. The objectivehaving from 4× to 20× and including a positive lens group forms an image with light from sample S. The lens group includes a single lens Lhaving a concave surface on an object side and a variable aperture diaphragm. The cameraconverts the image into an image signal. The observation scope changing device performs electronic scaling on the image signal and performs an observation scope changing process. The control device controls the diaphragmin accordance with the observation scope changing process. The observation devicesatisfies a conditional expression is satisfied,3≤||≤10where fa is a focal length of single lens Land fGS is a focal length of a lens group from an object plane to the diaphragm