发明名称 |
Light-amount detecting device, light source device, optical scanning unit and image forming apparatus |
摘要 |
A light-amount detecting device includes: a light source which emits a light beam; a branching optical element which divides the light beam emitted from the light source into a first light beam traveling in a predetermined direction and a second light beam traveling in a direction different to the predetermined direction; a light-condensing element which condenses the second light beam; a light-receiving element having a light-receiving surface which receives the second light beam condensed by the light-condensing element; and a detector which detects a light-amount of the second light beam received by the light-receiving element, and at least one of a direction of reflected light of the second light beam reflected from the light-receiving surface of the light-receiving element and spread of the reflected light of the second light beam reflected from the light-receiving surface of the light-receiving element is adjusted to control a light-amount of the reflected light of the second light beam returning to the light source. |
申请公布号 |
US8081203(B2) |
申请公布日期 |
2011.12.20 |
申请号 |
US20080039405 |
申请日期 |
2008.02.28 |
申请人 |
MASUDA KENSUKE;NAKAJIMA TOMOHIRO;ITOH SATORU;ICHII DAISUKE;SOEDA MASAHIRO;HAYASHI YOSHINORI;RICOH COMPANY, LTD. |
发明人 |
MASUDA KENSUKE;NAKAJIMA TOMOHIRO;ITOH SATORU;ICHII DAISUKE;SOEDA MASAHIRO;HAYASHI YOSHINORI |
分类号 |
B41J2/435;B41J27/00 |
主分类号 |
B41J2/435 |
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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