OPTICAL PICK-UP DEVICE COMPRISING A PHASE-SHIFT MIRROR

The present invention relates to an optical pickup device having a phase shift mirror, which universally adopts light sources for recording on and/or reproducing from both CDs and DVDs. In the optical pickup device with double light sources for CDs and DVDs, beams can travel the optical path at maxi...

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Bibliographic Details
Main Authors MOON, JONG WON, JEON, MI HYE, SEO, JUNG WOO, CHOI, SANG HWAN, YOU, HO SIK, KIM, JONG RYULL
Format Patent
LanguageEnglish
Published 19.06.2006
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:The present invention relates to an optical pickup device having a phase shift mirror, which universally adopts light sources for recording on and/or reproducing from both CDs and DVDs. In the optical pickup device with double light sources for CDs and DVDs, beams can travel the optical path at maximum efficiency (e.g., transmittance for P-polarized beams and reflectance for S-polarized beams) before being incident on the phase shift mirror. Additionally, because it employs a single element PS-MR instead of a mirror and a quarter wave plate, the optical pickup device can be constructed by assembling a smaller number of parts and thus have a low cost.
Bibliography:Application Number: KR20040105626