3D display device based on dual-polarization composite pinhole array

The invention discloses a 3D display device based on a dual-polarization composite pinhole array. The 3D display device comprises a display screen, a polarization composite pinhole array I and a polarization composite pinhole array II. A part of light emitted by each one-dimensional image element passes through the one-dimensional light-transmitting pinhole I corresponding to the image element and is projected to an imaging space through the polarization composite pinhole array II; a part of light emitted by each two-dimensional image element passes through the polarization composite pinhole array I and is modulated into polarized light II with the same polarization direction by the polarization composite pinhole array I, and the polarized light II is projected to the imaging space through a two-dimensional light-transmitting pinhole II corresponding to the two-dimensional image element; a part of light emitted by each two-dimensional image element passes through the two-dimensional light-transmitting pinhole