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:
Mar. 28, 2000
Filed:
Jun. 30, 1998
Applicant:
Inventors:
Hidayasu Takato, Hino, JP;
Yasutaka Kashiki, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
396296 ; 396378 ;
Abstract
A real image mode finder optical system includes a field frame switching device interposed between an objective system and an ocular system. An indication part of a field frame inserted by the field frame switching device is placed on the objective side of an intermediate image plane of the real image mode finder optical system. In this way, the finder optical system in which adhesion of dirt is inconspicuous and the view of the visual field of the finder is good can be obtained.