Large angle image steering device

An optical beam deflection device comprising:

• a dual-twist Pancharatnam phase device (DTPPD) including first and second Pancharatnam layers each with an in-plane twist and a transverse twist that is at least 75 degrees over the thickness of each Pancharatnam layer with the twist sense of the second Pancharatnam layer being opposite the twist sense of the first Pancharatnam layer;
• and
• an electro-optic polarization element arranged to input a circularly polarized light beam to the DTPPD with left-handed circular polarization or right-handed circular polarization controlled by an electrical input.

An optical beam deflection method comprising:

• generating circularly polarized light;
• and
• deflecting the circularly polarized light by a deflection angle magnitude of at least 40 degrees using a dual-twist Pancharatnam phase device (DTPPD) with intrinsic efficiency ηi of at least 0.90.