Patent ID: 7283433

Claim:
A manufacturing method for an optical head device including a plurality of light sources emitting light beams with different wavelengths, a plurality of diffraction elements generating a main beam and sub-beams from the respective light beams emitted from the plurality of light sources, a common light receiving element receiving a reflected light beam from an optical recording medium, and a device frame on which the plurality of light sources, the plurality of diffraction elements, the light receiving element and an objective lens drive mechanism are mounted, comprising the steps of: integrating at least the plurality of light sources and the plurality of diffraction elements with each other as an optical module; adjusting a relative positional relationship between the plurality of diffraction elements with each other on the optical module; then, adjusting spot positions of the sub-beams on the optical recording medium by adjusting the entire optical module on the device frame; and after that, fixing the optical module on the device frame.