发明申请
US20050094537A1 Optical pick-up apparatus and divergent angle-converting element 失效
光学拾取装置和发散角转换元件

Optical pick-up apparatus and divergent angle-converting element
摘要:
An optical pickup apparatus comprising: a first light source emitting first light flux having wavelength λ1 (380 nm≦λ1≦450 nm); a second light source emitting second light flux having wavelength λ2 (600 nm≦λ2≦700 nm); a third light source emitting third light flux having wavelength λ3 (750 nm≦λ3≦800 nm); a first divergent angle-converting element through which the first light flux passes; a second divergent angle-converting element through which the second light flux and the third light flux pass; and an objective optical element through which the first, second, and third light fluxes pass. Optical magnification m2 of the second divergent angle-converting element for the second light flux and optical magnification m3 of the second divergent angle-converting element for the third light flux are different from each other.
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