Semiconductor laser device and optical pickup device using the same

An optical pickup device, comprising:

• a focusing member;
• and
• a semiconductor laser device, comprising:
• a receiving/emitting optics integrated substrate, disposed in a case, including a first semiconductor laser element, a second semiconductor laser element, and a plurality of receiving optics that are integrated on a substrate, the first and second semiconductor laser elements having different emission wavelengths;
• and
• an optical element, disposed in the same case as that including the receiving/emitting for transmitting beam from the first or second semiconductor laser element to the focusing member optics integrated substrate,
• wherein a distance L1, when measured in air, from the first semiconductor laser element to the focusing member is substantially equal to a distance L2, when measured in air, from the second semiconductor laser element to the focusing member,
• wherein the focusing member is positioned to be fixed to the case of the semiconductor laser device and the optical element is configured to create the substantially equal distances.