Amplitude modulation method and device for pure-phase spatial light modulator

A technology of spatial light modulator and amplitude modulation, applied in the field of optics, can solve problems such as the inability to modulate a single spatial light modulator

Inactive Publication Date: 2016-06-15
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides an amplitude modulation method and device for a pure phase-type spatial light modulator, which can solve the problem that a single spatial light modulator cannot simultaneously and independently perform amplitude and phase modulation in the prior art. modulation problem

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  • Amplitude modulation method and device for pure-phase spatial light modulator
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  • Amplitude modulation method and device for pure-phase spatial light modulator

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Embodiment Construction

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] First aspect, such as image 3 As shown, the present invention provides a method for amplitude modulation of a phase-only spatial light modulator, the method comprising:

[0041] S1. Obtain the number N of pixels of the spatial light modulator total *M total , divide it into multiple subregions; N total Indicates the total number of rows ...

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Abstract

The invention relates to an amplitude modulation method and an amplitude modulation device for a pure-phase spatial light modulator. The method comprises the following steps: acquiring the number Ntotal*Mtotal of pixels of the spatial light modulator, and dividing the pixels into a plurality of sub-areas, wherein the number of pixels in each sub-area is N*M; randomly dividing the N*M pixels into a plurality of 1*2 modulation units; modulating incident light phases of two adjacent pixels in each modulation unit, and performing interference stacking or interference offset on the output light of the adjacent pixels to realize amplitude modulation of each modulation unit; modulating amplitudes between all modulation units on the sub-areas so as to realize modulation of a plurality of gray levels on the spatial light modulator. The amplitude modulation device provided by the invention is realized by using the amplitude modulation method. According to the amplitude modulation method and the amplitude modulation device for the pure-phase spatial light modulator, pure phase modulation and phase coupling-free amplitude modulation can be realized for the pure-phase spatial light modulator, and phase/amplitude-independent combined modulation can also be realized.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a phase-free coupling amplitude modulation and a joint modulation method and device in which the phase and amplitude are independent of each other for a pure phase-type spatial light modulator. Background technique [0002] A spatial light modulator is a device capable of modulating a spatial light beam, which is used to process the raw information to be processed into a required form. The spatial light modulator is composed of a series of independent units, each of which can modulate the optical signal of the system through the input electrical signal or optical signal, and change its own optical characteristics according to the control input signal, so as to realize the spatial light wave modulation, these units are also called pixels. [0003] According to different addressing methods, spatial light modulators can be divided into electrical addressable spatial light modulato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G09G3/36
CPCG02F1/133G09G3/36
Inventor 张蓓高枫闫鹏袁梅
Owner BEIHANG UNIV
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