| 摘要 |
PROBLEM TO BE SOLVED: To perform control of the rotational speed of a rotary polygon mirror from a low speed to a high speed with a simple configuration without increasing the capacity of storage means.SOLUTION: There is provided a scanning optical device that emits a laser beam according to an image signal input at a timing based on an output timing of a laser driving signal, in which a laser driving signal output circuit 504, when an output period is longer than a first period, outputs the laser driving signal on the basis of an output timing of a BD detection signal and a fixed second period.SELECTED DRAWING: Figure 5 |
