Patent ID: 9239508
Filing Date: 2016-01-19
CPC Classification: G02B,G02F

Claim Text:
1. An optical device comprising an optical structure, at least one pair of electrodes and a control unit, wherein the optical structure includes a first set of prisms and a second set of prisms which engage with each other, the second set of prisms are formed from electro-optical effect material or contain electro-optical effect material, and when no electric field is applied to the second set of prisms, the first set of prisms and the second set of prisms have the same refractivity; wherein each electrode of the at least one pair of electrodes resides on a respective one of end faces at two sides of the second set of prisms perpendicular to a plane on which the second set of prisms are located, for generating an electric field to change refractivities of the prisms of the second set in the direction of the electric field, so that light transmitted through the prisms of the first set can be totally reflected by the prisms of the second set; and the control unit is connected to the at least one pair of electrodes and performs control so as to power on the electrodes or power off the electrodes, and controls the intensity of the electric field when the electrodes are powered on.