Patent ID: 7920443

Claim:
An optical disk device comprising: a drive unit configured to rotate a first optical disk or a second optical disk; a first optical unit configured to emit a first wavelength of light; a second optical unit configured to emit a second wavelength of light, the second wavelength of light being longer than the first wavelength of light; a first focusing member configured to focus the first wavelength of light on the first optical disk; a second focusing member configured to focus the second wavelength of light on the second optical disk; and a carriage provided with the first optical unit, the second optical unit, the first focusing member, and the second focusing member, the carriage for mounting on a drive shaft to move along the drive shaft, wherein: the second focusing member is arranged on a first phantom line which passes through an axis of rotation of the drive unit and is parallel to a movement direction of the carriage, and the first focusing member is arranged on an opposite side of the first phantom line relative to the first optical unit and the second optical unit.