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:
Feb. 21, 1995
Filed:
May. 15, 1992
Masahiro Inagaki, deceased, late of Aichi, JP;
Kenzo Obata, Aichi, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A crystal resonant scanner has a scanning mirror which is cyclically reciprocally oscillatable for reflecting and deflecting a laser beam emitted by a laser beam source to scan an optically detectable pattern of information such as a bar code. A concave mirror is fixed in position for converging a light beam reflected off the optically detectable pattern upon scanning the optically detectable pattern with the light beam reflected by the scanning mirror. The concave mirror has a hole defined substantially centrally therein, and the scanning mirror is positioned in the hole. The light beam converged by the concave mirror is detected by a photodetector. The laser beam source and the photodetector are positioned in front of the scanning mirror and the concave mirror. The photodetector produces an electric signal indicative of the intensity of the detected light beam. The produced electric signal is supplied to an electric signal processing system which produces sampled values of the electric signal and reads the optically detectable pattern based on the sampled values.