Optical pickup device

Details Optical pickup device Optical pickup device

2005-10-04

2005-10-04

Tran, Thang V (Department: 2653)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C269S112000, C269S112000

Reexamination Certificate

active

06952389

ABSTRACT:
Disclosed herein is an optical pickup device. The optical pickup device has a lead frame package and a detecting unit. The lead frame package has a lead frame, a two-wavelength light source module and a hologram optical element. The lead frame has an opening formed to communicate with the outside. The two-wavelength light source module is arranged in a portion of the opening for emitting two beams having different wavelengths toward an optical disc. The hologram optical element is arranged over the two-wavelength light source module. Further, the hologram optical element includes a hologram pattern formed in its top and a wavefront-compensation hologram pattern formed on its bottom. The detecting unit has 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.

REFERENCES:
patent: 6072579 (2000-06-01), Funato
patent: 6272098 (2001-08-01), Takahashi et al.
patent: 6560188 (2003-05-01), Kyoya et al.

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