Invention Grant
US08169455B2 Optical scanning device, image forming apparatus, control method, and computer program product
有权
光学扫描装置，图像形成装置，控制方法和计算机程序产品
- Patent Title: Optical scanning device, image forming apparatus, control method, and computer program product
- Patent Title (中): 光学扫描装置，图像形成装置，控制方法和计算机程序产品
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Application No.: US12685768Application Date: 2010-01-12
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Publication No.: US08169455B2Publication Date: 2012-05-01
- Inventor: Kohji Sakai , Yoshinori Hayashi
- Applicant: Kohji Sakai , Yoshinori Hayashi
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Dickstein Shapiro LLP
- Priority: JP2009-021996 20090202; JP2009-235191 20091009
- Main IPC: H01S5/068
- IPC: H01S5/068 ; H01S5/0683 ; B41J2/447 ; B41J2/455 ; B41J2/47
Abstract:
In an optical scanning device including a vertical cavity surface emitting laser (VCSEL), an optical scanning device controls so as to satisfy P1 Ws, where P1 is light intensity obtained when a period of time corresponding to a minimum pixel unit (referred to as “T1”) has elapsed after start of illumination; P100 is light intensity obtained when a period of time 100 T1 has elapsed after the start of illumination; Wm is the static beam spot diameter in the main-scanning direction; and Ws is the static beam spot diameter in the sub-scanning direction.
Public/Granted literature
- US20100194843A1 OPTICAL SCANNING DEVICE, IMAGE FORMING APPARATUS, CONTROL METHOD, AND COMPUTER PROGRAM PRODUCT Public/Granted day:2010-08-05
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