发明名称 |
Optical scanning device, method of adjusting optical scanning device, and image forming apparatus |
摘要 |
An optical scanning device includes: a light source that emits a laser beam modulated and driven according to an image forming signal; a scanning optical system that includes a polygon mirror to scan a surface of a photoconductor with the laser beam from the light source; a surface identifying unit that associates a sub-scanning position by the polygon mirror with each surface of the polygon mirror; and a light-amount adjusting unit that adjusts a light amount of the light source according to the sub-scanning position, for each surface of the polygon mirror. |
申请公布号 |
US9557563(B2) |
申请公布日期 |
2017.01.31 |
申请号 |
US201514722559 |
申请日期 |
2015.05.27 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
Suzuki Mitsuo;Sakai Kohji |
分类号 |
B41J2/45;B41J2/47;G02B26/12;G03G15/04;G03G15/043 |
主分类号 |
B41J2/45 |
代理机构 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
代理人 |
Oblon, McClelland, Maier & Neustadt, L.L.P. |
主权项 |
1. An optical scanning device comprising:
a light source that emits a laser beam modulated and driven according to an image forming signal; a scanning optical system that includes a polygon mirror to scan a surface of a photoconductor with the laser beam from the light source; a surface identifying unit that associates a sub-scanning position by the polygon mirror with each surface of the polygon mirror; a light-amount adjusting unit that adjusts a light amount of the light source according to the sub-scanning position for each surface of the polygon mirror; a sub-scanning-position-group storage unit that stores a sub-scanning position for each surface of the polygon mirror as a sub-scanning position group in which sub-scanning positions of respective surfaces of the polygon mirror are grouped into a range of sub-scanning positions set in advance; and a counter that counts a number of the sub-scanning position groups for which grouping has been performed, wherein the light-amount adjusting unit adjusts a light amount of the light source according to the sub-scanning position group, and only when the number of the sub-scanning position groups is two or more, the light amount of the light source is adjusted by the light-source adjusting unit. |
地址 |
Tokyo JP |