发明申请
US20070008630A1 Lens and optical pickup device 失效
镜头和光学拾取装置

Lens and optical pickup device
摘要:
A lens is provided with a reflective annular zone face that is approximately perpendicular to the lens optical axis, and tilt of the reflective annular zone face is set to be equivalent to coma aberration resulting from the lens.
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