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:
Nov. 21, 1989
Filed:
Sep. 22, 1988
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A light beam scanning apparatus scans an object such as a stimulable phosphor sheet by applying a light beam deflected in a main scanning direction to the object while moving the object in an auxiliary scanning direction substantially normal to the main scanning direction. The light beam scanning apparatus includes first and second light detectors such as photodiodes juxtaposed in the main scanning direction and having respective light detecting surfaces extending in the auxiliary scanning direction. The first and second light detectors produce respective output signals at a predetermined ratio when the light beam for scanning the object in the main scanning direction is in a reference main scanning position, and produce respective output signals at a ratio varied from the predetermined ratio when the light beam is deviated from the reference main scanning positon. The main scanning position of the light beam with respect to the object can be detected from the ratio of the output signals of the first and second light detectors.