High-speed motion control method and system applied to phase modulation workbench of LCOS system

Abstract

The invention discloses a high-speed motion control method applied to a phase modulation workbench of an LCOS system, which comprises the following steps of: dividing a large-format processing graph into a plurality of graph blocks, generating two-dimensional physical coordinates and graph block numbers corresponding to each graph block, and carrying out progressive increase sorting on a two-dimensional physical coordinate set in a position file according to rows or columns; enabling the motion controller to upload the data to a motion controller memory in sequence according to rows or columns, and uploading the sub-bitmaps corresponding to the graphic block numbers to an LCOS board card memory in sequence according to rows or columns; and enabling the scanning shaft of the workbench to trigger a time sequence pulse signal through the position and send the time sequence pulse signal to the LCOS and the pulse light source at the same time to form rapid pulse scanning exposure. By utilizing the characteristics of large pulse laser energy, short pulse width and high repetition frequency, single-frame polarization pattern recording is realized based on a plurality of pulses, and the advantages of large exposure area, high efficiency and good reliability are realized by accurately controlling the movement of the workbench.

Description

technical field [0001] The invention relates to the field of liquid crystal alignment control, in particular to a high-speed motion control method and system applied to a phase modulation workbench of an LCOS system. Background technique [0002] The polarization orientation technology based on the liquid crystal spatial modulator is a programmable control device that can modulate the phase and amplitude of the incident light. A single projection orientation can realize the pattern recording of different orientations of liquid crystals in different selected areas. [0003] Patent application number CN201820881217.1 discloses a photo-alignment device for realizing arbitrary distribution in one exposure, and it introduces a photo-controlled alignment method using a pixelated electronically controlled phase delay device for a single exposure, wherein the pixelated electronically controlled phase delay device The phase delay of each pixel is controlled by the corresponding volta...

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Problems solved by technology

[0003] Patent application number CN201820881217.1 discloses a photo-alignment device for realizing arbitrary distribution in one exposure, and it introduces a photo-controlled alignment method using a pixelated electronically controlled phase delay device for a single exposure, wherein the pixelated electronically controlled phase delay device The phase delay of each pixel is controlled by the corresponding voltage, which is used to generate the phase delay of any pattern distribution, but the problem brought about by one exposure to generate the phase pattern is that the amount of data is proportional to the size of the format, which limits the preparation The format size of the device is also doomed to be unable to produce high-precision...

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