发明授权
US07843792B2 Optical information recording /reproducing device and objective lens for the same 有权
光信息记录/再现装置和物镜相同

Optical information recording /reproducing device and objective lens for the same
摘要:
There is provided an objective lens including a first optical member and a second optical member which are made of materials different from each other and are cemented together at a cementing surface. The cementing surface includes a first phase shift structure having a plurality of refractive surface zones concentrically formed about an optical axis of the objective lens. The first phase shift structure satisfies conditions (1) and (2): 0.85
信息查询
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