Multibeam time division multiplexing (TDM) holographic three-dimensional display system and method
A time-division multiplexing, three-dimensional display technology, applied in stereo systems, instruments, electrical components, etc., can solve problems such as affecting image display quality and disadvantages, and achieve the effect of reducing complexity and avoiding use.
Inactive Publication Date: 2011-09-14
SUN YAT SEN UNIV
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If time-division multiplexing is used, the high-order diffraction item corresponding to one incident beam will be superimposed on the zero-order diffraction item corresponding to other incident beams, which seriously affects the display quality of the image, which is not conducive to the practical application of this method
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[0041] In order to solve the problems existing in the existing technology, we design a polarizing aperture diaphragm, combined with the selection of the pixel filling factor, suppress the high-order diffraction term, and realize the holographic three-dimensional display with a large viewing angle by time-division multiplexing with multiple beams of light incident. Light path structure such as Figure 4 shown.
[0042] The invention discloses a multi-beam time-division multiplexing holographic three-dimensional display system, which includes: a liquid crystal polarization switch 20, a 4f system 30, a polarization aperture stop 40, a spatial light modulator 10 and a control unit 50;
[0043] Wherein, the polarization gating unit 20 is a liquid crystal polarization switch, which can quickly change the direction of the polarization passing light, and gating different polarization components of the modulation information;
[0044] The 4f system 30 is composed of a first lens and a...
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The invention relates to a multibeam time division multiplexing (TDM) holographic three-dimensional display system and method. The multibeam TDM holographic three-dimensional display system comprises a 4f system, a spatial light modulator, a polarization gating unit, an aperture diaphragm and a control unit, wherein the 4f system consists of a first lens and a second lens; the spatial light modulator is used for inputting computer generated hologram codes and displaying the frequency spectrum distribution of the input codes on a frequency spectrum face corresponding to the spatial light modulator through the conversion of the first lens; the polarization gating unit is used for acquiring orthogonal modulation information of adjacent incident light under a polarization state by combining with the spatial light modulator; the clear aperture of the aperture diaphragm consists of orthogonal polaroids in sequence, and the aperture diaphragm is positioned on the frequency spectrum face which is determined by the spatial light modulator through the first lens; the control unit is used for controlling the incidence sequence and time of the incident light of the spatial light modulator; and the light information is filtered by the polarized aperture diaphragm and then converted through the second lens to reproduce input information of the spatial light modulator on the effective modulation face. By means of the multibeam TDM holographic three-dimensional display system and method disclosed by the invention, the broadened synthesis of diffraction view angles is realized, a real three-dimensional image with a large view angle is displayed, and the practical development of a computer generated hologram three-dimensional display technology is facilitated.
Description
technical field [0001] The invention belongs to the technical field of three-dimensional image display, and relates to a multi-beam time-division multiplexing holographic three-dimensional display system with a large viewing angle and a display method thereof. Background technique [0002] Because two-dimensional display is difficult to clearly and accurately express the depth information of the third dimension, people have been working on the research of display technology that can display three-dimensional scenes - three-dimensional image display technology. Holographic three-dimensional display technology uses light diffraction or interference to record the amplitude and phase information of object light, and then reconstructs the information of object light through light diffraction. It is the only true three-dimensional display technology among various display methods. [0003] Early optical holography needed to prepare a model of a three-dimensional object, and reflect...
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IPC IPC(8): G03H1/22H04N13/00
Inventor 滕东东王彪刘立林
Owner SUN YAT SEN UNIV
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