High-resolution 3D display device based on stepped gradient aperture polarization slit grating

The invention discloses a high-resolution 3D display device based on a stepped gradient aperture polarization slit grating. The high-resolution 3D display device comprises a display screen, a stepped gradient aperture polarization slit grating I and a stepped gradient aperture polarization slit grating II. The interval width of the adjacent light-transmitting slits I corresponding to the same image element is greater than the aperture width of the light-transmitting slit II between the adjacent light-transmitting slits I; a part of light emitted by each image element passes through the stepped gradient aperture polarization slit grating I and is modulated into polarized light I with the same polarization direction by the stepped gradient aperture polarization slit grating I, the polarized light I is projected to an imaging space through the light-transmitting slit II corresponding to the image element, and a 3D image is reconstructed; a part of light emitted by each image element passes through the light-tran