发明名称 |
Method of evaluating characteristics of a light beam, apparatus for evaluating the characteristics, and apparatus for adjusting a write unit by employing the evaluation method |
摘要 |
At least two light beam detection units are spaced at a predetermined distance and provided in the scanning direction of a surface to be scanned. A light beam is emitted to the light beam detection unit provided on a scanning start side, by lighting a light beam source which is employed to scan the surface linearly during a scanning period equivalent to 1 dot during scanning. A light beam is emitted to the light beam detection unit provided on a scanning end side, by lighting the light beam source during the scanning period after elapse of a light-off period computed from a previously designed scanning speed and the predetermined distance. Based on a detection result of the light beam detection unit provided on the scanning start side and a detection result of the light beam detection unit provided on the scanning end side, scanning characteristics required of the light beam are evaluated.
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申请公布号 |
US6275249(B1) |
申请公布日期 |
2001.08.14 |
申请号 |
US19990398757 |
申请日期 |
1999.09.17 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
OZAKI SHINICHI;ABE KATSUSHI;TAKAHASHI NOBUHIRO |
分类号 |
B41J2/47;G02B26/12;H04N1/00;H04N1/113;(IPC1-7):B41J2/435 |
主分类号 |
B41J2/47 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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