Summarize the focal property and aberration correcting ability of VLS plane grating.
对平面变栅距光栅的聚焦特性和像差校正原理进行了较全面的综述。
As a typical broadband network application, VLS-VOD has attracted large Numbers of service providers and users.
超大规模VOD应用作为宽带网络中的典型应用，对服务提供商和用户都有强烈的吸引力。
Make the ruling experiments for VLS grating using the phase scanning method. Analyze the ruling error primarily.
采用相位扫描方法进行了变栅距光栅的刻划实验，并对刻划误差进行了初步的分析。
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