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Method and device for true color 3D object holographic display

A three-dimensional object, holographic display technology, applied in the field of holographic display, can solve the problems of insufficient holographic reproduction image to obtain a good true color 3D display effect, complex calculation algorithm, low diffraction efficiency, etc., and achieve high light energy utilization efficiency and low noise. , the effect of no conjugate image

Inactive Publication Date: 2009-10-28
SHANGHAI UNIV
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Problems solved by technology

However, most of the existing SLM-based digital holographic display technologies are aimed at the holographic reproduction of monochromatic objects.
In addition, in the existing research on hologram calculation and reconstruction methods for color objects, most of them are holographic displays for two-dimensional (2D) color images, and it is difficult to realize true-color holographic display in 3D space
In the few existing calculation methods and reproduction systems for 3D true-color objects, due to the complexity of the calculation algorithms and the influence of factors such as zero-order spots, conjugate images, low diffraction efficiency, and chromatic aberration in the reproduction process, its holographic reproduction The image quality is not yet good enough for a good true color 3D display

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  • Method and device for true color 3D object holographic display

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Embodiment Construction

[0031] Preferred embodiments of the present invention are described in detail as follows in conjunction with accompanying drawings:

[0032] This true color 3D object holographic display method, as attachedfigure 1 As shown, the specific operation steps are: ① Decompose the chromatic image information of the true-color three-dimensional object into three color components of red, green and blue (RGB) according to the principle of colorimetry, and the information of each color component contains the corresponding amplitude information and depth information; ②Calculate the kinoform of each color component through Fresnel scalar diffraction theory and random phase kinoform calculation method; ③Sequence images composed of RGB component kinoforms are simultaneously output through synchronous control to three phase-type spatial light modulators, and supplemented by laser illumination of corresponding colors; ④The receiving screen receives the reproduced images of RGB components from t...

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Abstract

The invention relates to a method and a device for true color 3D object holographic display. Colorful image information of a true color 3D object is decomposed into RGB coloring information which comprises component amplitude information and depth information of each color, and a multi-component-level phase type kinoform of each color component of the 3D object is calculated according to the depth information and amplitude information of each color component; image series formed by each color component kinoform are output respectively to three spatial light modulators with phase modulation capacity under the control of an isochronous controller, simultaneously relevant light of relevant color is adopted to illumine the kinoform carried by three spatial light modulator, beams modulated by the kinoform show the component information of RGB of an original true color 3D object, and holographic true color reappearance effect is obtained after integration of the component information. The invention designs a plurality of devices and provides a position relation setting method of key devices in an opto-electrical reappearance device. The invention can be used for holographic display of a static or dynamic true color 3D object or scene.

Description

technical field [0001] The invention relates to a method and a device for realizing true-color three-dimensional (3D) stereoscopic display by using computational holographic technology combined with digital holographic photoelectric reproduction technology, and belongs to the technical field of holographic display. Background technique [0002] Holographic technology can reproduce real 3D stereoscopic images in space, and can satisfy all visual perception functions. It is an ideal 3D stereoscopic display technology. However, the holographic display method based on traditional film recording and reproduction is relatively cumbersome in the recording and processing process, and it is difficult to realize dynamic display, which limits its development in the field of 3D stereoscopic display. Computational holography has developed rapidly in recent years because of its low noise and good repeatability, and is suitable for hologram calculation of virtual objects. [0003] With th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/26G03H1/32
Inventor 郑华东于瀛洁王涛周文静代林茂
Owner SHANGHAI UNIV
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