Multi-view three-dimensional display device based on holographic projection and control method

Abstract

The invention discloses a multi-view three-dimensional display device based on holographic projection and a control method, which belong to the field of three-dimensional display. The device comprisesa laser, a spatial filter, a first lens, a second lens, a first plane, a second plane and a beam splitting prism, wherein the propagation path of beams emitted by the laser is provided with the spatial filter and the first lens sequentially; the light path of parallel light generated by the first lens is provided with the beam splitting prism; the reflection light path of the beam splitting prismis provided with a spatial light modulator; the transmitting light path of the beam splitting prism is provided with the second lens; the first plane and the second plane are arranged before and after the second lens; and a cylindrical lens grating is arranged on the second plane. The scheme is simple and compact in the optical structure, the adopted cylindrical lens grating used has low cost andsimple manufacturing process, and the reconstruction of the pure phase hologram has higher diffraction efficiency.

Description

technical field [0001] The present invention relates to the technical field of three-dimensional display, in particular to a multi-view display based on holographic projection Figure three A three-dimensional display device and a control method. Background technique [0002] In recent years, three-dimensional (3D) display has been a research hotspot in the scientific and industrial circles, and many technologies for developing 3D displays have been developed. Due to good 3D performance and immersive perception, stereoscopic display is called a commercially representative 3D display technology, although viewers need to wear special glasses to cause free viewing barrier. In practical applications, autostereoscopic displays have shown great potential in many applications, especially in mobile electronics, home theaters, and entertainment venues, due to factors such as superior performance and lower price. Slit gratings or lens arrays were first introduced to achieve dual-view...

AI Technical Summary

Problems solved by technology

[0004] However, the current SLM-based holographic 3D displays still have many limitations, the defect is that the number of pixels is insufficient and the pixel pitch is too large, which leads to the extremely low spatial bandwidth of SLM.

If the currently available SLM is used, the holographic reconstruction cannot be observed with the eyes, which greatly limits the visual experience of the observer

Although several space-division multiplexing or time-division multiplexing methods have been proposed to build holographic 3D display systems, usually multiple SLMs or high-speed SLMs with a synchronous scanning mechanism are required, making the system configuration expensive and complicated

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