#Y2024 #光学器件 #偏振 Give half-wave or quarter-wave retardation nearly independent of wavelengths ![](https://cdn.jsdelivr.net/gh/Sterncat/BlogPics/OpticsWiki/Rhomb-1.png) λ/4 Retardance Fresnel Rhomb Retarder (left) and λ/2 Retardance Fresnel Rhomb Retarder (right) ![](https://cdn.jsdelivr.net/gh/Sterncat/BlogPics/OpticsWiki/Rhomb-2.jpg)