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. 28, 1993
Filed:
May. 13, 1991
Donald A Collins, Jr, Cambridge, OH (US);
Charles K Wike, Jr, Cambridge, OH (US);
Stephen J Ames, New Concord, OH (US);
NCR Corporation, Dayton, OH (US);
Abstract
A dynamic laser diode aperture for collimating light from a laser diode within an optical scanner which increases the power of the beam to a predetermined maximum. The optical scanner includes a motor having a hollow circular shaft through which the light passes. A lens member focuses the light, and the dynamic aperture, located within a cap member within an end of the motor shaft closest to the laser, collimates the focused light. The dynamic aperture approximates the shape of the unfocused light pattern from the laser diode. In the preferred embodiment, the dynamic aperture is generally rectangular in shape and rotates with the motor shaft.