Fig. 1
From: Full degree-of-freedom polarization hologram by freeform exposure and inkjet printing
Schematics of full-freedom polarization hologram. a Realization of full-freedom polarization hologram by freeform surface exposure and inkjet printing. The yellow fringes on bottom correspond to the arbitrary wavefront achieved by regulating the recording laser with a freeform surface. The top layer with varied color signifies the locally adjusted liquid crystal film. b Left region with Bragg surface slant angle α1 and thickness t1. c Right region with Bragg surface slant angle α2 and thickness t2