Optical Scanning Device

An optical scanning device comprising:

• a first light source configured to emit first light;
• a second light source configured to emit second light;
• a first deflector comprising:
• a first deflecting member configured to deflect the first light to scan the deflected first light;
• and
• a first driver configured to drive the first deflecting member to rotate about a first axis in a first rotation direction;
• a second deflector comprising:
• a second deflecting member configured to deflect the second light to scan the deflected second light;
• and
• a second driver configured to drive the second deflecting member to rotate about a second axis in a second rotation direction, the second axis being parallel to the first axis, and the second rotation direction being opposite to the first rotation direction;
• and
• a light detecting unit configured to detect the first light deflected by the first deflecting member and the second light deflected by the second deflecting member,
• wherein as viewed in an axial direction along the first axis and the second axis, the light detecting unit is disposed on one side relative to a first line and between a second line and a third line, the first line passing through the first axis and the second axis, the second line passing through the first axis and perpendicular to the first line, and the third line passing through the second axis and perpendicular to the first line.