Three-dimensional imaging device and method

A three-dimensional imaging device, comprising:

• a lens group, gathering light beams to output a first light beam and a second light beam towards a first direction;
• a beam-splitting prism group comprising a first beam-splitting prism and a second beam-splitting prism provided on a side of the lens group outputs the light beams, wherein the first beam-splitting prism transmits and reflects the first light beam to output a first transmitted light beam towards the first direction and a first reflected light beam towards a second direction;
• wherein the second beam-splitting prism transmits and reflects the second light beam to output a second transmitted light beam towards the first direction and a second reflected light beam towards the second direction;
• wherein the first direction and the second direction have a preset angle;
• a polarizer group comprising at least three polarizers, wherein the at least three polarizers are provided on a side of the beam-splitting prism group outputs a light beam, wherein at least one of the polarizers is provided on a side of the beam-splitting prism group outputs a transmitted light beam, and at least one of the polarizers is provided on a side of the beam-splitting prism group outputs a reflected light beam;
• wherein the transmitted light beam comprises the first transmitted light beam and the second transmitted light beam, wherein the reflected light beam comprises the first reflected light beam and the second reflected light beam;
• wherein the polarizer group converts the transmitted light beam or the reflected light beam into a polarized light of a preset polarization angle;
• and
• a sensor group comprising at least three sensors, wherein a position of each sensor corresponds to a position of each polarizer, wherein each sensor obtains the polarized light of the preset polarization angle output from each polarizer to form an image.