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. 30, 1987
Filed:
Jul. 02, 1986
Hideyuki Kenjyo, Koganei, JP;
Olympus Optical Co., Ltd., , JP;
Abstract
In an optical recording and/or reproducing apparatus for recording and/or reproducing an information signal on and/or from an optical record disc by projecting a light beam spot onto the rotating disc by means of an objective lens, the objective lens is moved linearly in a disc radial direction over a small distance by means of a fine adjusting mechanism and the fine adjusting mechanism is moved in a stepwise manner in the disc radial direction over a large distance by means of a coarse driving mechanism including a pulse motor. The objective lens is moved together with the fine adjusting mechanism at a high speed and during intervals between successive stepwise movements, the objective lens is moved linearly by the fine adjusting mechanism. In this manner, the objective lens can be driven linearly over the large distance and a desired point of the disc can be quickly accessed.