Liquid crystal polymer/N-BK7 window material, 3-layer substrate + 3-layer LCP film, with mechanical housings
Uniform fast-axis orientation within each region of the individual layers of the LCP film, with the overall fast-axis alignment formed by stacking corresponding regions of the three layers of the LCP film
Fast-axis orientation symmetrically divided into 6 angular segments of 60°each, with a retardation of λ/2