Image forming apparatus and control method thereof
US8565627B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2009 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Dec 2, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/00063
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There is provided an image forming apparatus which shortens the time taken for circumference detection and measures the circumference at high precision without obstructing downsizing of the apparatus. To accomplish this, the image forming apparatus detects, at an arbitrary timing, the physical pattern of the image-formed surface of a rotation member that changes over time. In the second round, the image forming apparatus detects the second pattern at a timing a predetermined time after the arbitrary timing. By using the detected patterns, the image forming apparatus obtains information associated with the circumference of the rotation member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.