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:
Sep. 22, 1998
Filed:
Jul. 25, 1996
Kunihiko Itou, Anjo, JP;
Naoki Ukai, Okazaki, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
Distance L between best focus surface BF to reading opening 22 is in a range satisfying the condition: 2 mm.ltoreq..vertline.L.vertline..ltoreq.2a.multidot..omega./D, where 'D' represents the size of a short side of an elongated hole of a diaphragm 34a, 'a' represents a distance from an objective-side principal point of an imaging lens 34 to the best focus surface BF, '.omega.' represents a minimum width of a module of bar code 8, 'L' represents a distance measured from the best focus surface BF toward imaging lens 34, and .vertline.L.vertline. represents an absolute value of distance L. With this arrangement, adverse effect of stains, wounds and scratches of bar code 8 can be averaged or decentralized along the longitudinal direction of the bar of bar code 8 without deteriorating a reading accuracy in the lateral direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile