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Making use of the 3rd luminous flux of the 3rd
Making use of the 3rd luminous flux of the 3rd
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机译:利用第三者的第三者光通量
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摘要
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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