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:
Nov. 28, 2000
Filed:
Sep. 22, 1998
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An objective lens switching device of the present invention is a device in which assembly and adjustment in order to correctly position each objective lens on an optical axis are easy and a switching action can quickly be performed with certainty without receiving an influence of a mounting condition of objective lenses or a change in the revolver over time in use. A CPU reads an angular displacement from an angle sensor from a revolution position of a turret outside a detection range of an engagement sensor and issues a command of start braking to a driver when the angular displacement reaches a predetermined given angle. A revolution position of the turret at which the CPU starts the braking is correctly set all the time since the detection range of the engagement sensor and an engagement position of the turret are correctly adjusted.