Patent ID: 9740017
Date: 2017-08-22
CPC Classifications: G02B,G02F,G03B,H04N

Claim:
1. An optical polarization device for a stereoscopic image projector, comprising: a polarizer optical element configured to decompose an incident light beam emitted by a stereoscopic image projector, into: the polarizer optical element comprising two beam splitter-polarizer plates, joined together, a join between the plates being placed on a trajectory of the incident beam; first and second optical reflectors configured to modify, respectively, the trajectory of the first and second reflected light beams such that the reflected and transmitted light beams are projected to form one and same stereoscopic image; first, second, and third polarization modulators configured to selectively switch the optical polarization, respectively, of the transmitted light beam, of the first and of the second reflected light beams, between the first and second optical polarization states in response to a control signal; a control circuit for the polarization modulators, programmed to deliver a control signal controlling the switching of the polarization, at a given instant, of the transmitted light beam or of each of the first and second reflected light beams, such that the reflected and transmitted light beams all exhibit one and same optical polarization state, wherein the first optical reflector comprises a reflecting panel, bearing on at least four points, the four points being disposed at the vertex of a trapezium, the device further comprising at least one actuator loading the reflecting panel in a direction passing through the trapezium to deform the reflecting panel out of the plane of the trapezium, wherein the actuator is fixed to the reflecting panel at least over an entire height of the trapezium, and wherein the actuator comprises a flexible element fixed to the reflecting panel, the flexible element being glued to the reflecting panel on a surface in shape of a trapezium whose base is opposite to the base of the trapezium of points for holding in position, the actuator loading the reflecting panel by the flexible element.