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Calculation holographic three-dimensional image display method and system based on first order spectra face recombination

A technology for calculating holography and three-dimensional images, which is applied in stereoscopic systems, image communications, instruments, etc., can solve problems such as crosstalk, and achieve the effect of increasing the viewing angle and facilitating practical use

Inactive Publication Date: 2013-05-08
SUN YAT SEN UNIV
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Problems solved by technology

However, due to the periodic structure of the modulation device pixels, there are high-order diffraction items in the spectral surface, which will overlap with the recombined spectral surface, causing serious crosstalk

Method used

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  • Calculation holographic three-dimensional image display method and system based on first order spectra face recombination
  • Calculation holographic three-dimensional image display method and system based on first order spectra face recombination
  • Calculation holographic three-dimensional image display method and system based on first order spectra face recombination

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Embodiment

[0028] Such as figure 1 As shown, the spectrum reconstruction system of the present invention includes: a collimating lens 10 (focal length f for providing the system with a parallel incident light beam) c ), by the first lens 31 (focal length f 1 ) and the second lens 32 (focal length f 2 ) composed of spectrum reconstruction optical system 30, let f 1 =f 2 =f f ; The spatial light modulator 20 (pixel size p) located on the front focal plane of the first lens 31 x ×p y , resolution M×N); a point light source located on the front focal plane of the collimator lens 10; and an aperture 40 located on the back focal plane (system spectrum plane) of the first lens 31.

[0029] The collimator lens 10 can convert the beam emitted by the coherent point light source on its front focal plane into a parallel beam, and enter the spatial light modulator 20 at a specific angle; the spatial light modulator 20 inputs a two-dimensional code, and passes through the first lens 31 conversi...

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Abstract

The invention discloses a calculation holographic three-dimensional image display method and system based on first order spectra face recombination. M*N resolution ratio of the target surface of a space optical modulator is converted into (2M)*(N / 2) on an equivalent modulation surface by setting a pixel filling factor in the x direction of the space optical modulator to be 0.5, adopting irradiation light with two different incident angles and filtering non-first order spectra information through diaphragm under the condition of keeping constant area, and the pixel size in the x direction is minimized by 0.5 time so as to achieve the double widening of a Fresnel calculation holographic three-dimensional image display viewing angle. The invention can realize double-eye viewable three-dimensional image display of single space optical modulator and has positive effect on the practicability of a calculation holographic three-dimensional image display technique.

Description

technical field [0001] The invention relates to the technical field of three-dimensional image display, and specifically discloses a computational holographic three-dimensional image display method and system based on first-order spectral surface recombination. 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 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 the beam for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/22H04N13/00
Inventor 腾东东王彪
Owner SUN YAT SEN UNIV
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