OPTICAL SCANNING DEVICE, IMAGE FORMING APPARATUS, CONTROL METHOD, AND COMPUTER PROGRAM PRODUCT

摘要

In an optical scanning device including a vertical cavity surface emitting laser (VCSEL), an optical scanning device controls so as to satisfy P1<P100 and Wm>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.