Holographic wavefront printing system and method

A holographic wavefront printing system, comprising:

• a laser, a phase spatial light modulator, a first lens, a second lens, a low-pass filter and a holographic recording material;
• wherein the laser is configured to generate a laser light, and the laser light is divided into two light beams, namely an object light and a reference light;
• the phase spatial light modulator is configured to load a phase hologram, a pixel structure of the phase spatial light modulator comprises an active region and a dead region, the active region is configured to load the phase hologram to modulate a phase of an incident light, thereby generating an active region diffracted light containing information of the phase hologram, the dead region causes a constant phase shift of the incident light, producing a dead region diffracted light;
• a two-dimensional digital blazed grating is loaded on the phase hologram to adjust an emergent direction of the active region diffracted light, such that corresponding frequency spectra of the active region diffracted light and the dead region diffracted light after being subjected to an optical Fourier transform of a lens are prevented from overlapping with each other on a back focusing surface of the lens;
• the object light is incident on the phase spatial light modulator and emits a corresponding diffracted light, the diffracted light comprises the active region diffracted light and the dead region diffracted light;
• the diffracted light is incident on the first lens and emitted onto a back focusing surface of the first lens after being subjected to an optical Fourier transform of the first lens, the phase spatial light modulator is inclined by a preset angle to change an emergent direction of the diffracted light, such that a dead region zeroth-order diffracted light frequency spectrum center and a dead region first-order diffracted light frequency spectrum center on a focusing surface are symmetrical with respect to a main optical axis of the first lens, and an active region zeroth-order diffracted light frequency spectrum center is adjusted to an original frequency spectrum center, the original frequency spectrum center refers to a position of the active region zeroth-order diffracted light frequency spectrum center on the back focusing surface of the first lens when the two-dimensional digital blazed grating is not loaded and the phase spatial light modulator is not inclined;
• the low-pass filter is placed on the back focusing surface of the first lens, and configured to filter the dead region diffracted light and the active region high-order diffracted light, and only emits the active region zeroth-order diffracted light;
• the second lens is placed on an emergent direction of the low-pass filter, and configured to perform an optical Fourier inverse transform on the emitted active region zeroth-order diffracted light to obtain an object light containing effective information of the phase hologram;
• the object light containing the effective information of the phase hologram and the reference light are incident onto the holographic recording material, interference is generated in the holographic recording material, and a volume hologram is generated to complete a holographic wavefront printing process.