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Liquid crystal aberration correcting method without wavefront detection

A technology of aberration correction and wavefront detection, which is applied in the field of space optical communication, can solve problems such as low energy utilization rate, affecting communication system performance, and consuming beam energy, so as to avoid energy loss, high modulation accuracy, and reduce communication errors rate effect

Inactive Publication Date: 2019-05-10
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0003] Liquid crystals only correct polarized light and the dispersion problem of liquid crystal materials leads to low energy utilization. The detector in the traditional wavefront detection method occupies most of the light beam, further consuming the beam energy and affecting the performance of the communication system.

Method used

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  • Liquid crystal aberration correcting method without wavefront detection
  • Liquid crystal aberration correcting method without wavefront detection
  • Liquid crystal aberration correcting method without wavefront detection

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] Such as figure 1 As shown, the liquid crystal aberration correction method without wavefront detection uses a system including: a liquid crystal aberration corrector, an image acquisition module, a convolutional neural network module, and a grayscale conversion module. Among them, the liquid crystal aberration corrector acts as an actuator to correct the distorted wavefront of the received light; the image acquisition module is responsible for receiving the beam corrected by the liquid crystal and collecting it as a spot image; after a large amount of spot data training, the convolutional neural network The module fits the Zernike coefficient corresponding to the light spot according to the spot image collected by the imaging system; finally, the grayscale conversion module converts the fitted Zernike coefficient into a g...

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Abstract

The invention discloses a liquid crystal aberration correcting method without wavefront detection. A used system comprises a liquid crystal aberration corrector, an image acquisition module, a convolutional neural network module and a grayscale conversion module. The specific method is as follows: the liquid crystal aberration corrector is used as an executing mechanism to correct distorted wavefront of received light; the image acquisition module is responsible for receiving light beams after liquid crystal correction, and acquiring the light beams as light spot images; after large-amount light spot data training, the convolutional neural network module is used for carrying out fitting according to the light spot images acquired by an imaging system to obtain Zernike coefficients corresponding to light spots; and finally, the grayscale conversion module is used for converting the Zernike coefficients obtained by fitting into grayscale values and controlling the liquid crystal aberration corrector to correct an aberration.

Description

technical field [0001] The invention relates to the technical field of space optical communication, in particular to a liquid crystal aberration correction method without wavefront detection, which mainly efficiently corrects the aberration through the liquid crystal aberration correction without wavefront. Background technique [0002] The space optical communication system usually refers to the communication method using laser as the carrier and atmospheric transmission as the medium, which has the advantages of large information capacity, high confidentiality, small terminal size, and strong anti-electromagnetic interference ability. When the laser signal passes through the atmospheric channel, the weak atmospheric turbulence causes the optical refractive index to fluctuate randomly, resulting in problems such as wavefront aberration and light intensity speckle in the laser signal, which seriously affect the coupling efficiency and communication performance of the communic...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02F1/133G06T7/66
Inventor 郭弘扬黄永梅徐杨杰杜升平胡婕任曦
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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