Data processing method driven by liquid crystal optical phased array

Abstract

The invention discloses a data processing method driven by a liquid crystal phased array. The data processing method specifically comprises the following steps: acquiring a voltage-phase shift characteristic of a liquid crystal optical phased array; obtaining required phase and address corresponding data through the obtained relation between the voltage and the phase, and simplifying the requiredphase and address corresponding data into an mif file; calculating the phase difference required by each angle, and after the FPGA receives the deflection angle sent by the upper computer, reading thedata in the mif through the state machine to control the device. According to the method, the law that the phase difference of the adjacent areas is constant in the single period when the liquid crystal phased array works is utilized for conducting linear processing on the phase, needed voltage data are read through the one-to-one correspondence relation between the voltage and the phase to drivehardware, and the control efficiency is improved. The voltage precision can be adjusted according to the stepping size of the phase data, so that the control precision is improved.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal optics, and in particular relates to a liquid crystal optical phased array drive technology. Background technique [0002] OPA (Optical Phased Array) technology plays a vital role in the free space laser communication system relying on its advantages of high precision and agile scanning. It can be used to scan a specific area and obtain the distance of the target and orientation information. Therefore, it can speed up ATP (acquisition, tracking and targeting) before establishing data communication; at the same time, it has important applications in multiple fields such as adaptive optics detection, laser weapons and lidar. The traditional mechanical beam scanning technology uses inertial mechanical components such as complex gimbals and rotating platforms. This method has the advantages of high scanning efficiency and wide field of view. However, due to the influence of mechanical transmi...

AI Technical Summary

Problems solved by technology

The disadvantage of this control method is that it takes a long time for data calculation and access, and the second is that the control accuracy is low, which cannot meet the requirements of liquid crystal optical phased arrays to achieve accurate and fast laser deflection.

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