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Objective lens, optical head, optical system, and design method for objective lens
Objective lens, optical head, optical system, and design method for objective lens
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机译:物镜,光学头,光学系统以及物镜的设计方法
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摘要
An objective lens of this embodiment is used in an optical head in which a distance between a DVD laser and a CD laser is fixed. The objective lens focuses a laser beam emitted from the DVD laser on a DVD by a numerical aperture of 0.60, and focuses a laser beam emitted from the CD laser on a CD by an numerical aperture of 0.47. The wavefront aberration in design for CD is set greater than the wavefront aberration in design for DVD.
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