A Method for Continuously Expanding the Viewing Angle of Computational Holographic Reconstruction Image
A technology for computing holography and reconstructing images, which is applied in the field of holographic display, and can solve problems such as small viewing angles of reconstructed images, visual areas that cannot meet the binocular viewing needs of human eyes, and affect people's visual viewing experience.
Active Publication Date: 2021-02-12
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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Problems solved by technology
[0008] Only when the viewer is in the viewing area can the complete reproduced image be obtained, but currently limited by the development level of SLM, the viewing angle of the reproduced image is very small, and the viewing area cannot meet the binocular viewing needs of the human eye, thus affecting people's vision. visual viewing experience
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[0032] The following describes in detail a typical embodiment of a method for continuously enlarging the viewing angle of a computed holographic reconstructed image according to the present invention, and further specifically describes the present invention.
[0033] The method for continuously enlarging the viewing angle of view of a calculated holographic reconstructed image in the present invention includes two steps: the enlargement of the reproduced light by the sub-hologram and the enlargement of the reproduced light by the holographic functional screen, because the principle of continuously expanding the viewing angle in different directions is the same, in this case Expand the viewing angle in the horizontal direction.
[0034] The first step is to enlarge the reproduced light by the sub-hologram. First, this case uses an SLM in the form of a 1×3 matrix, three SLMs (SLM 1 、SLM 2 and SLM 3 ) are arranged side by side in the horizontal direction, and the size of the w...
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The invention proposes a method for continuously enlarging the viewing angle of a computed holographic reconstructed image. In this method, the SLMs are arranged side by side to form a matrix array to load the CGH, and the CGH is generated by superposition of all interferograms. By increasing the size of the interferogram corresponding to the object point, it is ensured that the boundary diffraction angle of the modulated reproduction light of each interferogram is the maximum diffraction angle of the SLM. At the same time, the holographic functional screen is placed on the imaging surface to diffuse the reproduced light after the image point, and eliminate the effect of the gap between the SLMs, so as to realize the continuous expansion of the viewing angle of the reproduced image in the direction of the arrangement of the SLMs.
Description
technical field [0001] The invention relates to the field of holographic display, in particular to a method for continuously enlarging the viewing angle of a computed holographic reconstructed image. Background technique [0002] For a recorded object with a size D, when a computational hologram (CGH) is generated and reproduced at a recording distance L, if the center of the spatial light modulator (SLM) is set as the coordinate origin o, the pixel size is p, and the working area size is H, the size of the frame is d, then a first-level reconstructed image with a size of D is generated at the distance L from the SLM, and the relationship between the SLM, the reconstructed image and the viewing angle is shown in the attached figure 1 shown. In the figure, the maximum diffraction angle generated by the SLM modulated reproduced light is θ, which is determined by the pixel interval p of the SLM and the wavelength λ of the reproduced light, and the formula (1) is satisfied betw...
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IPC IPC(8): G03H1/08G03H1/22
CPCG03H1/0808G03H1/0866G03H1/0891G03H1/22G03H2001/0825
Inventor 刘素娟刘楠楠王东琳张志峰翟凤潇翟玉生郝蕴琦张晓东杨坤
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY