A color holographic three-dimensional display method and system based on space division

Abstract

The invention belongs to the calculation holographic three-dimensional display field and particularly relates to a colorful holographic three-dimensional display method based on space division and a system thereof. The system utilizes a CCD camera or a computer graphical method to acquire a multi-perspective two-dimensional image of a colorful target object, through pre-processing transformation, a set of target images suitable for phase type hologram calculation are generated; an iteration Fourier transform algorithm is utilized to calculate corresponding phase type holograms; a single spatial light modulator is divided into red, green and blue sub zones, the sub zones respectively load corresponding red, green and blue component holograms, a hologram diffraction reproduction characteristic is utilized to generate three single-color holographic reproductive images on a reconstruction plane, directional diffraction of pixels of the three reproductive images is carried out to a fixed position to form different view points, multi-perspective colorful reproductive images are acquired, and true colorful three-dimensional display is realized; in combination with a spatial light modulator, rapid refresh loading of the holograms is carried out, and multi-perspective true colorful full-parallax dynamic holographic three-dimensional reproduction is realized.

Description

technical field [0001] The invention relates to a three-dimensional display method, in particular to a spatial light modulator-based holographic three-dimensional display method and device, and belongs to the field of computational holography and three-dimensional display. Background technique [0002] With the rapid development of display technology and computer science, people have put forward higher requirements for display technology in medical imaging, commercial art, military defense and other aspects. These requirements are far beyond the scope of the current two-dimensional (2D) display. Therefore, true-color three-dimensional (3D) display has become an inevitable requirement of the modern information society and an important goal of the development of modern display technology. As a near-perfect imaging technology, color holographic 3D display can not only provide true-color 3D images that are almost close to the real world, but also provide 3D vision at all viewpoi...

AI Technical Summary

Problems solved by technology

However, the size of its recorded hologram is restricted by the size of the laser beam, which is limited in the application of making large-area holograms, which restricts its application in practice.

In 1969, Benton first used the two-step method to make a rainbow hologram. The rainbow hologram is the product of the combination of image holography and slits. It can reproduce holographic information under natural light. The recording optical path may have a greater energy utilization rate, but the disadvantage is that the two-step recording process is cumbersome, and due to the two-step recording, the noise of the hologram is relatively large

However, in order to achieve true color display, the article uses a hexagonal structure light guide plate to realize the directional export of red, green and blue light. However, this hexagonal light guide plate does not match the existing flat panel display methods.

Moreover, the preparation of nano-gratings by electron beam exposure has low preparation efficiency and high cost, which also limits its application in display.

[0011] In China, the research on color dynamic holographic three-dimensional display is still in its infancy, and there are no relatively mature prototypes and engineering applications.

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