Phase distribution curved surface regulation and control method and system
A phase distribution and control system technology, applied in the field of optics, can solve the problems of wasting manpower, phase depth cannot be directly represented and displayed, and low precision, and achieve the effect of improving diffraction efficiency and
Active Publication Date: 2021-04-30
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
In the prior art, the phase depth of the electronically controlled phase modulation device cannot be directly characterized and displayed, and the ideal phase distribution surface can only be obtained by blindly adjusting the voltage applied to the electronically controlled phase modulation device
Closed-loop control is not realized in the prior art, and the voltage can only be adjusted continuously by people, the adjustment efficiency and accuracy are relatively low and waste manpower
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] The object of the present invention is to provide a control method and system for a phase distribution surface, so as to improve the control efficiency and precision of the phase distribution surface.
[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[00...
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The invention provides a phase distribution curved surface regulation and control method and system. The method comprises the following steps: firstly, acquiring a gray signal in an image; determining the image according to the first light beam; calculating the gray signal to obtain a phase distribution curved surface; calculating an error between the phase distribution curved surface and a set phase distribution curved surface; judging whether the error is less than or equal to a set threshold to obtain a judgment result; if the judgment result shows that the gray signal exists in the image, stopping acquiring the gray signal in the image; and if the judgment result indicates that the gray signal does not exist in the image, substituting the error into an adaptive algorithm, calculating an adjusted voltage, and applying the adjusted voltage to the electric control phaser, so that the electric control phaser performs polarization and phase depth modulation processing on the input light beam according to the adjusted voltage to generate a first light beam, and returns to obtain a gray signal again. According to the invention, the diffraction efficiency of the electric control phaser and the regulation and control efficiency and precision of the phase distribution curved surface are improved.
Description
technical field [0001] The invention relates to the field of optical technology, in particular to a control method and system for a phase distribution curved surface. Background technique [0002] Due to the uneven thickness of the box of the actually processed electronically controlled phase device, the actual phase distribution surface is different from the ideal phase distribution surface. In the prior art, the phase depth of the electronically controlled phase modulation device cannot be directly characterized and displayed, and the ideal phase distribution surface can only be obtained by blindly adjusting the voltage applied to the electronically controlled phase modulation device. In the prior art, the closed-loop control is not realized, and the voltage can only be adjusted continuously by people, and the adjustment efficiency and precision are relatively low and waste manpower. Contents of the invention [0003] The object of the present invention is to provide a ...
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IPC IPC(8): G02F1/01
CPCG02F1/0136
Inventor 陆建钢张鸿州
Owner SHANGHAI JIAO TONG UNIV