Invention Patent
AT521965T
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- Patent Title:
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Application No.: AT05252748Application Date: 2005-05-04
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Publication No.: AT521965TPublication Date: 2011-09-15
- Inventor: KIMURA TOHRU , SAKAMOTO KATSUYA
- Applicant: KONICA MINOLTA OPTO INC
- Assignee: KONICA MINOLTA OPTO INC
- Current Assignee: KONICA MINOLTA OPTO INC
- Priority: JP2004138635 2004-05-07
- Main IPC: G02B5/18
- IPC: G02B5/18 ; G11B7/135 ; G11B7/00 ; G11B7/1353 ; G11B7/1369 ; G11B7/139 ; G11B7/1392
Abstract:
An optical pick-up apparatus comprising: a first light source emitting a first light flux; a second light source emitting a second light flux; a third light source emitting a third light flux; and an optical element, wherein the optical element has a first optical surface having a first area including an optical axis of the optical element, and a second area positioned outside the first area, the second area includes a light-shielding structure being capable of substantially shielding the third light flux and being capable of transmitting the first light flux and the second light flux.
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