US 12,405,571 B2
Large-depth metasurface polarization holographic 3D display method
Qionghua Wang, Beijing (CN); Di Wang, Beijing (CN); Yilong Li, Beijing (CN); and Qian Huang, Beijing (CN)
Assigned to BEIHANG UNIVERSITY, Beijing (CN)
Filed by BEIHANG UNIVERSITY, Beijing (CN)
Filed on Oct. 10, 2024, as Appl. No. 18/911,429.
Claims priority of application No. 202311561884.3 (CN), filed on Nov. 22, 2023.
Prior Publication US 2025/0164929 A1, May 22, 2025
Int. Cl. G03H 1/08 (2006.01); G02B 30/25 (2020.01); G03H 1/04 (2006.01); G03H 1/22 (2006.01); G03H 1/00 (2006.01)
CPC G03H 1/0808 (2013.01) [G02B 30/25 (2020.01); G03H 1/0443 (2013.01); G03H 1/0866 (2013.01); G03H 1/22 (2013.01); G03H 2001/0088 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A large-depth metasurface polarization holographic 3D display method, comprising:
for two different 3D objects, that is, a first 3D object and a second 3D object, performing calculations based on an angular spectrum diffraction theory to obtain a first metasurface hologram and a second metasurface hologram of the two 3D objects respectively, and performing left-handed circularly polarized light holographic reconstruction and right-handed circularly polarized light holographic reconstruction by using the first metasurface hologram and the second metasurface hologram, respectively;
performing interleaved row-by-row insertion of the first and the second metasurface holograms to encode into a synthetic hologram, optimizing phases of the synthetic hologram by using an error diffusion algorithm to obtain phase information required by metasurface structures, that is, meta-phase information;
designing the metasurface structures based on the meta-phase information, and making a metasurface structure in odd rows sensitive to left-handed circularly polarized light, and a metasurface structure in even rows sensitive to right-handed circularly polarized light; and
performing holographic 3D reconstruction by illuminating the metasurface structures with laser; when the metasurface structures are illuminated by the left-handed circularly polarized light, the metasurface structure only in the odd rows is sensitive to incident light, such that a phase of light field can be modulated, in which case, a large-depth holographic reconstruction image of the first 3D object can be seen; when the metasurface structures are illuminated by the right-handed circularly polarized light, the metasurface structure only in the even rows is sensitive to incident light such that the phase of light field can be modulated, in which case, a large-depth holographic reconstruction image of the second 3D object can be seen; and when the metasurface structures are illuminated by the left-handed circularly polarized light and the right-handed circularly polarized light simultaneously, the large-depth holographic reconstruction images of the first 3D object and the second 3D object can be seen at the same time.