Holographic imaging method, holographic imaging device, holographic imaging system, and storage medium

A holographic imaging device, comprising:

• a laser device;
• a laser beam expanding and collimating system;
• and
• a liquid crystal cell,
• wherein the laser beam expanding and collimating system is configured to expand a light beam from the laser device and enable the expanded light beam to be transmitted substantially vertically to the liquid crystal cell, and an amplitude-transmission coefficient distribution of the liquid crystal cell is determined in accordance with a brightness distribution of holographic interference fringes of an object to be displayed,
• wherein the liquid crystal cell further comprises two microlens array layers arranged at two outer surfaces of the liquid crystal cell respectively, and the two microlens array layers comprise a first microlens array layer and a second microlens array layer;
• wherein the first microlens array layer is arranged at a light-entering side, and each lens unit of the first microlens array layer is located at an opening area of a corresponding pixel area;
• wherein the second microlens array layer is arranged at a light-exiting side, and each lens unit of the second microlens array layer is located on an entire pixel area of the corresponding pixel area;
• wherein the pixel area refers to a projection area on a plane substantially perpendicular to incident light rays where each lens unit of the second microlens array layer is located, and the opening area of the pixel area refers to a remaining area other than an area occupied by a Black Matrix (BM) within the entire pixel area of the pixel area;
• wherein a number of lens units of the first microlens array layer is the same as a number of lens units of the second microlens array layer;
• and
• wherein the first microlens array layer and the second microlens array layer form an afocal system configured to enable a first width of incident light rays substantially different from a second width of outgoing light rays.