| 摘要 |
<p>Disclosed is an optical scanning device that includes a first scanning mirror which is supported to be able to oscillate; a first scanning mirror driving unit which drives the first scanning mirror so as to oscillate; a light emission signal output unit which outputs a light emission signal, for emitting a laser beam, to a laser light source during the period of time taken for the reflected beam of a laser beam irradiated toward the first scanning mirror to complete one back-and-forth scan corresponding to the oscillation of the first scanning mirror; a light receiving unit which is arranged at a position so as to receive the reflected beam of a laser beam irradiated toward the first scanning mirror when the reflected beam scans an end of a scanning line which is a range of scanning corresponding to the oscillation of the first scanning mirror, and which outputs a detection signal upon receipt of the reflected beam; and a phase control unit which controls the first scanning mirror driving unit such that in a case wherein the light receiving unit does not output the detection signal during a predetermined period of time before and after an intermediate time between the time when the light emission signal output unit started outputting the light emission signal and the time when the light emission signal output unit ceased outputting the light emission signal, if the light receiving unit outputs the detection signal before the intermediate time between the time when the light emission signal output unit started outputting the light emission signal and the time when the light emission signal output unit ceased outputting the light emission signal, the first scanning mirror driving unit delays the phase of the oscillation of the first scanning mirror, and if the light receiving unit outputs the detection signal after the intermediate time between the time when the light emission signal output unit started outputting the light emission signal and the time when the light emission signal output unit ceased outputting the light emission signal, the first scanning mirror driving unit advances the phase of the oscillation of the first scanning mirror.</p> |
