Telecentric operation ( field rays leave parallel to optical axis, unlike Barlow lenses which diverge rays ).

远心手术 ( 场射线离开平行光轴, 不像巴卢镜片,其中发散射线 ).

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Be aware as well that these transforms centered about the zero - frequency optical axis of the system.

还要记住这些变换式是以系统的光轴(频率为零)为中心的.

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