发明名称 |
Method of measuring a deviation in timing of a start of writing in scanning lines, optical scanning device, and image forming apparatus |
摘要 |
A method for measuring a deviation in timing of start of writing in scanning lines is implemented by an optical scanning device that scans a surface to be scanned with light beams from light-emitting elements having first and second light-emitting elements which are arranged so as to be displaced from each other in a direction corresponding to a direction of the scanning lines. The method includes: detecting timing at which light from the first light-emitting element is received by a light receiving element, as a first time, the light receiving element outputting a synchronization detecting signal before start of writing; detecting timing at which light from the second light-emitting element is received by the light receiving element, as a second time; and obtaining the deviation in timing for the second light-emitting element with respect to the first light-emitting element based on a difference between the first and second time. |
申请公布号 |
US8760738(B2) |
申请公布日期 |
2014.06.24 |
申请号 |
US201012978833 |
申请日期 |
2010.12.27 |
申请人 |
Ricoh Company, Limited |
发明人 |
Nihei Yasuhiro |
分类号 |
H04N1/46 |
主分类号 |
H04N1/46 |
代理机构 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. A measuring method for measuring a deviation in timing of start of writing in a plurality of scanning lines using an optical scanning device that writes image information on a surface to be scanned by scanning the surface with a plurality of light beams along a plurality of scanning lines, the light beams being output from a plurality of light-emitting elements including a first light-emitting element and a second light-emitting element which are arranged so as to be displaced from each other in a direction corresponding to a direction of the scanning lines, the measuring method comprising:
detecting timing at which light from the first light-emitting element is received by a light receiving element, as a first time, the light receiving element outputting a synchronization detecting signal before start of writing; detecting timing at which light from the second light-emitting element is received by the light receiving element, as a second time; and obtaining a deviation in timing of start of writing for the second light-emitting element with respect to the first light-emitting element based on a difference between the second time and the first time.
|
地址 |
Tokyo JP |