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. 22, 1992
Filed:
Sep. 25, 1991
Joseph M Lindacher, Cambridge, OH (US);
NCR Corporation, Dayton, OH (US);
Abstract
A focus changing apparatus and method for an optical scanner which can easily be adapted to existing optical scanners or can provide the front end for a new scanner. The laser beam focus changing apparatus may be optically located between a laser source and a mirrored spinner and includes a plurality of spherical mirror segments having a predetermined radius. Each is located at its respective radius from a common axis. A rotating device, such as a motor, rotates the spherical mirror segments about their common axis. The spherical mirror segments may be mounted on top of the mirrored spinner. If so, the focus changing apparatus may additionally include a deflector mirror for deflecting the beam towards the spherical mirror segments and a spherical mirror adjacent the deflector mirror is optically located to receive the beam after it is reflected from the spherical mirror segments and to redirect the beam towards the mirrored spinner.