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:
Dec. 11, 1984
Filed:
Jul. 08, 1982
Applicant:
Inventor:
Toshimi Hayasaka, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350525 ; 350526 ; 350528 ; 350318 ;
Abstract
A vertical illuminator for microscope permits a choice between a vertical bright and a vertical dark field illumination. The illuminator includes a light diminishing member or a light shield member which is operated in response to an illumination switching operation. The light diminishing member may be moved out of an illumination light path or the light shield member may be temporarily advanced into the illumination light path, as desired, thereby decreasing a difference in the brightness of the field of view as the illumination is switched. In this manner, the observation is facilitated and the likelihood of damaging the eyes of a viewer is eliminated.