Optical disc drive

An optical disc drive capable of recording/reproducing data to/from an optical disc, said optical disc being either one of a first disc and a second disc, a protective layer of said first disc being thinner that that of said second disc, comprising:

• a first laser diode that emits a first laser beam having a first wavelength;
• a second laser diode that emits a second laser beam having a second wavelength, said second wavelength being longer than said first wavelength;
• an objective lens that converges the first laser beam on said first disc, and the second laser beam on said second disc;
• and
• a driving unit that holds and rotates said optical disc,
• an optical axis of said objective lens being inclined relative to a normal to said optical disc,
• a beam emitting point of said first laser diode being located at a first position, coma, which is caused when the first laser beam is converged on a data recording surface of said first disc, being minimized when said first laser beam is emitted from said first position, and
• a beam emitting point of said second laser diode being located at a second position which is different from said first position, wherein coma, which is caused when the second laser beam is converged on a data recording surface of said second disc, is minimized when said second laser beam is emitted from said second position.