Space-time multiplexing method for suppressing computer-generated holographic display speckle noise

A speckle noise and computational holography technology, applied in the field of holographic display, can solve the problem of difficult to use spatial light modulator holographic display, etc., to achieve the effect of complete viewing, suppression of speckle noise, and suppression of generation

Active Publication Date: 2017-10-13
SICHUAN UNIV
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AI Technical Summary

Problems solved by technology

The pixel separation method also needs to calculate multiple holograms, and it is difficult to use the spatial light modulator to realize real-time dynamic holographic display

Method used

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  • Space-time multiplexing method for suppressing computer-generated holographic display speckle noise
  • Space-time multiplexing method for suppressing computer-generated holographic display speckle noise
  • Space-time multiplexing method for suppressing computer-generated holographic display speckle noise

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Embodiment Construction

[0023] A typical embodiment of a space-time multiplexing method for suppressing speckle noise in computed holographic display is described in detail below, so as to further describe the present invention in detail.

[0024] The synthetic graph generation method of the present invention comprises the following steps:

[0025] Step 1: Determine the reproduction light wavelength is 532nm, the aperture of the spatial light modulator is 15.36mm, the reproduction distance is 500mm, and the radius of the Airy spot .

[0026] Step 2: Obtain the spatial light modulator's horizontal resolution of 1920, vertical resolution of 1080, horizontal pixel interval of 8 μm, vertical pixel interval of 8 μm, and horizontal sampling interval of Airy spots and vertical pixel spacing , according to the airy spot sampling interval and the airy spot radius, the pixel separation number of the recorded scene graph , ceil() represents the upward rounding operation, max() represents the operation of...

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Abstract

The invention proposes a space-time multiplexing method for suppressing computer-generated holographic display speckle noise. According to the method, a plurality of computer-generated holograms are generated by a pixel separation method, and the reproduction of the computer-generated holograms is performed by the space-time multiplexing method according to light polarization state characteristic and visual persistence characteristic of a human eye. The computer-generated holograms is reproduced according to groups, the computer-generated holograms in the same group employ reproduced light with different polarization states, the suppression of speckle nose of Airy disc image points which are stacked is achieved by space multiplexing of a plurality of space light modulators, for the computer-generated holograms in different groups, the Airy disc image points are prevented from being stacked in space by a time multiplexing method, and the generation of the speckle noise is further prevented; and meanwhile, by a visual persistence effect of the human eye, the complete viewing of recording information is achieved.

Description

technical field [0001] The invention relates to the field of holographic display, in particular to a space-time multiplexing method for suppressing speckle noise in computational holographic display. Background technique [0002] Holographic display can not only restore the amplitude information of the recorded scene, but also restore the phase information representing the relative position of objects in the scene, providing viewers with the same visual experience as viewing the real scene, known as the most ideal stereoscopic display method . Among them, computational holography has become one of the research hotspots in display technology due to its unique flexibility and high efficiency. However, due to the high coherence of the reconstructed light required by the computational holographic display, when the diffracted light forms the required reconstructed image on the receiving screen, it will also generate randomly distributed speckle noise, which seriously reduces the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/26
CPCG03H1/26G03H1/2645G03H2001/2605G03H2001/2655
Inventor 王琼华刘素娟肖聃
Owner SICHUAN UNIV
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