Patent ID: 6952389

Claim:
An optical pickup device, comprising: a lead frame package comprising, a lead frame in which an opening is formed to communicate with the outside, a two-wavelength light source module arranged in a portion of the opening for emitting two beams having different wavelengths toward an optical disc, and a hologram optical element arranged over the two-wavelength light source module, the hologram optical element comprising a hologram pattern formed in its top for diffracting all beams reflected from the optical disc, and a wavefront-compensation hologram pattern formed on its bottom for transmitting a first one of two beams having different wavelengths and diffracting a second one of them to condense the two beams onto a single point; and a detecting unit comprising a board arranged beneath the lead frame package to be separated from and moved independently of the lead frame package, and a photo detector mounted on said board, wherein the lead frame package constitutes a single module.