Diffractive Optical Elements with a Large Angle of Operation Recorded in Acrylamide Based Photopolymer on Flexible Substrates

Figure 1

Schematic of the diffractive optical elements (DOEs) which redirects the incident light to an off-axis focus point, with inset showing typical fringe structure. Where is the fringe spacing and is the angle between the fringes and the normal to the plane of the recording medium.