The invention discloses a
liquid crystal light beam deflection and scanning device. The device comprises a wedged
liquid crystal box, a
liquid crystal polymer polarization
grating and adjustable liquid
crystal half-
wavelength plate combination and a quarter-wave plate, wherein a liquid
crystal layer is arranged between two oppositely arranged base plates of the wedged liquid
crystal box; light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and molecules on the liquid crystal layer are uniformly distributed and in parallel with the first base plate; the liquid crystal
polymer polarization
grating and adjustable liquid crystal half-
wavelength plate combination is provided with two parallel base plates, a liquid crystal layer and liquid crystal polymers, the light-alignment films with molecules pointing to the vector direction and uniformly distributed are arranged on the sides, adjacent to the liquid crystal layer, of the two base plates, and light-alignment films with molecules pointing to the vector direction and gradually changing periodically are arranged on the sides, adjacent to the liquid crystal
polymer layer of the two base plates; the quarter-wave plate is used for converting
linearly polarized light into circularly polarized light.
Continuous light beam deflection and scanning in a large angle range can be realized by means of the liquid crystal
light beam deflection and scanning device.