Invention Grant
US07687762B2 Monitoring device, light source device, optical scanning device, and image forming apparatus having an aperture member for shaping a beam diameter of a monitoring light beam
有权
监视装置，光源装置，光学扫描装置和具有用于使监视光束的光束直径成形的光圈部件的成像装置
- Patent Title: Monitoring device, light source device, optical scanning device, and image forming apparatus having an aperture member for shaping a beam diameter of a monitoring light beam
- Patent Title (中): 监视装置，光源装置，光学扫描装置和具有用于使监视光束的光束直径成形的光圈部件的成像装置
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Application No.: US12186808Application Date: 2008-08-06
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Publication No.: US07687762B2Publication Date: 2010-03-30
- Inventor: Naoto Watanabe , Daisuke Ichii
- Applicant: Naoto Watanabe , Daisuke Ichii
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Limited
- Current Assignee: Ricoh Company, Limited
- Current Assignee Address: JP Tokyo
- Agency: Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2007-233483 20070910
- Main IPC: H01J3/14
- IPC: H01J3/14
Abstract:
A monitoring device includes a first aperture plate, a second aperture plate, and a photodiode. The first aperture is disposed in a light path of a light beam emitted by a light source and includes a first aperture arranged such that a portion of the light beam having maximum light intensity passes and a reflecting portion that reflects the light beam as a monitoring light beam. The second aperture plate is disposed in a light path of the monitoring light beam and includes a second aperture that shapes a beam diameter of the monitoring light beam. The photodiode receives the monitoring light beam.
Public/Granted literature
- US20090065685A1 MONITORING DEVICE, LIGHT SOURCE DEVICE, OPTICAL SCANNING DEVICE, AND IMAGE FORMING APPARATUS Public/Granted day:2009-03-12
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