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Computational holographic three-dimensional display method and system capable of representing the occlusion relationship of reconstructed images

A technology of occlusion relationship and calculation holography, which is applied in the direction of instruments, etc., can solve the problems of insufficient space bandwidth product, low accuracy of occlusion relationship, and difficulty in realizing dynamic three-dimensional display, etc., and achieve the effect of improving the space bandwidth product

Active Publication Date: 2020-05-19
SUZHOU UNIV
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Problems solved by technology

Based on the principle of volumetric 3D display voxel point scanning, it aims to design a spatial light modulator-based 3D display technology to overcome the shortcomings of insufficient spatial bandwidth product, low accuracy of occlusion relationship, and difficulty in realizing dynamic 3D display in existing computational holographic 3D display technologies. Computational Holographic Dynamic 3D Display System Capable of Representing the Occlusion Relationship of 3D Object Reconstruction Image

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  • Computational holographic three-dimensional display method and system capable of representing the occlusion relationship of reconstructed images
  • Computational holographic three-dimensional display method and system capable of representing the occlusion relationship of reconstructed images
  • Computational holographic three-dimensional display method and system capable of representing the occlusion relationship of reconstructed images

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Embodiment 1

[0030] Embodiment 1: A computational holographic three-dimensional display method capable of expressing the occlusion relationship of reconstructed images, including the following steps:

[0031] 1) Step of designing a primitive hologram: decompose the three-dimensional object into a series of voxel points, the voxel point is the smallest component unit of the three-dimensional object, and design the corresponding numbers of each voxel point according to the intensity and position of each voxel point The Fresnel lens acts as a primitive hologram, and the intensity here refers to the light intensity, which is used to represent the brightness information of the voxel point on the three-dimensional object;

[0032] 2) Step of cutting the occluded information: determine the propagation direction of each voxel point according to the occlusion relationship between each voxel point, and realize the occlusion relationship by programmatically cutting the primitive hologram. On the meta...

Embodiment 2

[0038] Embodiment 2: A computational holographic three-dimensional display method capable of expressing the occlusion relationship of reproduced images, which is a further step on the basis of Embodiment 1:

[0039] 1) The step of designing a primitive hologram: decompose the three-dimensional object into a series of voxel points, the voxel point is the smallest component unit of the three-dimensional object, and the digital Fresnel lens designed according to the intensity and position of each voxel point As a primitive hologram, a digital grating is added to the digital Fresnel lens by encoding, and the lateral position of the voxel point is regulated by changing the period and orientation of the digital grating;

[0040] 2) Step of cutting the occluded information: according to the occlusion relationship between each voxel point, the propagation direction of each voxel point is determined, and the occlusion relationship is realized by programmatically cutting the primitive ho...

Embodiment 3

[0048] Embodiment 3: A computational holographic three-dimensional display method capable of expressing the occlusion relationship of reproduced images, using converging spherical wave illumination or placing a lens in the light path of parallel light wave illumination to build a holographic reproduction system. Considering that the physical parameters such as pixel size and resolution of commercial spatial light modulators are limited, this will lead to a narrower viewing angle of reproduction voxel points, a smaller control range of spatial light modulators, and a cutting range of viewing angles of voxel points. For smaller problems, the above-mentioned technical problems can be effectively solved by using converging spherical wave illumination or placing a lens in the optical path of parallel light wave illumination, such as Figure 5 to Figure 8 shown. Figure 5 Under the condition of parallel light illumination and a rear lens in the optical path, the schematic diagram of...

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Abstract

The invention belongs to the field of computational holography and three-dimensional display, and specifically relates to a method and system for computational holographic three-dimensional display, which utilizes a spatial light modulator to load a computational hologram to reproduce voxel points to precisely control the intensity, position coordinates and propagation of voxel points direction, the hologram gray level corresponding to the occluded information of each voxel point on the primitive hologram is set to a fixed value, so as to correctly represent the occlusion relationship of the voxel point, combined with the spatial light modulator array to refresh and load the computational hologram can realize Dynamic 3D display provides a practical solution for the application of holographic 3D display technology. It has the characteristics of fast refresh rate, can correctly represent the occlusion relationship of 3D object reproduction images, can represent full parallax, and has no visual fatigue.

Description

technical field [0001] The invention belongs to the field of calculation holography and three-dimensional display, and in particular relates to a calculation holography three-dimensional display method and system. Background technique [0002] Computational holographic three-dimensional display, as the most promising true three-dimensional display method, is an organic combination of holography and computer display technology. Displays a 3D image. Using spatial light modulators to continuously refresh and load computational holograms to realize holographic 3D video display is an important goal of the development of modern display technology. However, due to factors such as insufficient space-time bandwidth product of spatial light modulators, holographic 3D video display is still unable to enter the application stage. A more effective solution at this stage is to use a spatial light modulator array with a high frame rate to perform spatiotemporal multiplexing. In 1995, N....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/22
CPCG03H1/22
Inventor 施玲燕吴建宏苏衍峰陈海东
Owner SUZHOU UNIV
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