The main advantage with Conoscopic Holography is that only a single ray-path is needed for measuring, thus giving an opportunity to measure for instance the depth of a finely drilled hole.

 
  • 但相对于可见光的其他辐射线,如红外线,也是能被应用于这项用途的。因为大部分情况下,被动式扫描法并不需要规格太特殊的硬体支援,这类被动式产品往往相当便宜。
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