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. 18, 2018
Filed:
May. 26, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Hiroyuki Fukuhara, Suntou-gun, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An image forming apparatus includes: a rotating polygonal mirror having reflection surfaces, and to reflect a luminous flux at each reflection surface so as to scan a photosensitive member; a detection unit configured to detect the luminous flux; a measurement unit configured to measure an interval between time points at which the detection unit detects the luminous flux; a storage unit configured to store correction value data for correcting an image signal for each reflection surface relative to a reference reflection surface; and a specification unit configured to select a characteristic value from among a plurality of values that are obtained from results of measurements, and to specify the reference reflection surface based on the characteristic value. The plurality of values include results of predetermined operations performed on two or more intervals measured by the measurement unit.