A frequency selective surface (FSS) is a metallic periodic structure with frequency selective properties. Depending upon design, it may be low-pass, high-pass, band-pass, band-stop filter.
频率选择表面（FSS）是具有选择频率功能的一块金属周期结构，它可以被设计成低通、高通、带通、带阻滤波器。
A new optical profilometry linearly coded profilometry is presented. It USES a periodic linear structure illuminating light to code the surface and the phase shifting technique to decode the phase.
提出一种新的光学轮廓术线性编码轮廓术，它利用周期线性结构光编码三维物面，并辅以相移技术来解调相位。
It suggests that the phase structure can be controlled by lowering the surface energy of polyetherimide and it is a possible way to obtain co-continuous structure with a smaller periodic distance.
因此，通过改变固化温度和聚醚酰亚胺的端基来降低聚醚酰亚胺的表面能，可以在一定程度上调控反应诱导相分离体系的相结构，并获得相间距较小的双连续结构。
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