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                                  What is a ...Scanning field mirror, also often called F-Theta field mirror or f-θ field mirror, is a specia... 查看更多
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                                  What is th...The connection of the bandwidth of the filter is often used in bandpass filters (divided into narrow... 查看更多
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                                  Refractive...Refractive index is an important concept in optics, which describes the characteristics of the chang... 查看更多