An optical modulation method and device, a holographic display device

A technology for optical modulation and modulation of light beams, applied in the optical field, can solve the problems of stray light, low diffraction efficiency, consumption of large computing resources, etc., and achieve the effect of reducing difficulty, high holographic display, and high resolution

Active Publication Date: 2020-12-01
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the holographic display technology based on the amplitude modulator needs to use coding technology to embed the phase, which will lose the resolution of the modulator, and the diffraction efficiency is low, and the stray light is serious; while the holographic display technology based on the phase modulator needs to use The iterative algorithm to realize the modulation of the amplitude of the phase hologram needs to consume a lot of computing resources, which increases the difficulty of real-time processing by the computer

Method used

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  • An optical modulation method and device, a holographic display device
  • An optical modulation method and device, a holographic display device
  • An optical modulation method and device, a holographic display device

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Embodiment Construction

[0022] Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] figure 1 is a schematic block diagram of an embodiment of the optical modulation device of the present invention.

[0024] Such as figure 1 As shown, the optical modulation device of this embodiment includes an amplitude modulator 1 , an optical scanning component 2 and a phase modulator 3 .

[0025] The amplitude modulator 1 is used to generate a first modulated light beam according to the amplitude information in the complex amplitude information of each pixel of the digital hologram. Digital image data may be represented in the form of a matrix, where the data at each location represents amplitude information for a corresponding pixel. A digital hologram can also be expressed in the form of a matrix. The difference from ordinary digital image data is that the data at each position in the digital hologram matrix represents the amplitu...

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Abstract

The present disclosure proposes an optical modulation device, including: an amplitude modulator, which generates a first modulated light beam based on the amplitude information in the complex amplitude information of each pixel of a digital hologram; an optical scanning component, which receives the first modulated light beam from the amplitude modulator. modulating the light beam, and scanning the first modulated light beam within a predetermined range; a phase modulator, which receives the first modulated light beam from the optical scanning component, and performs phase modulation on the received first modulated light beam based on the phase information in the complex amplitude information to generate a second modulated beam. The present disclosure also provides an optical modulation method. Through the optical modulation method and device of the present disclosure, the amplitude and phase modulation of the light beam can be performed simultaneously to realize high-resolution holographic display.

Description

technical field [0001] The invention relates to the field of optics, in particular to an optical modulation method and device and a holographic display device. Background technique [0002] In holographic display technology, electronically controlled modulators are required to have amplitude and phase modulation capabilities. Most of the existing electronically controlled modulators are two-dimensional matrix spatial light modulators based on liquid crystal technology, which only have phase modulation capability or only. Among them, the holographic display technology based on the amplitude modulator needs to use coding technology to embed the phase, which will lose the resolution of the modulator, and the diffraction efficiency is low, and the stray light is serious; while the holographic display technology based on the phase modulator needs to use The iterative algorithm to realize the modulation of the phase hologram to the amplitude needs to consume a large amount of com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/12G03H1/22
CPCG03H1/12G03H1/22G03H2210/12G03H2210/11G03H1/2286G03H1/2294G03H2001/0224G03H2001/2292G03H2225/31G03H2225/32G03H2225/33G03H2223/24G03H1/14G03H1/0443G03H2210/44G03H2225/34
Inventor 石炳川
Owner BOE TECH GRP CO LTD
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