Liquid crystal optical switch for optical phased array scanning

Abstract

The invention discloses a liquid crystal optical switch for optical phased array scanning, and an assembly manufacturing method. The switch is composed of a first layer of liquid crystal panel and a second layer of liquid crystal panel which are arranged in an up-down manner; a first directional thin film, a row scanning electrode, an upper layer glass plate and an upper polarizer are sequentiallyarranged on the upper surface of the first layer of the liquid crystal panel in parallel; a second directional thin film, a row signal electrode and a middle glass plate are sequentially arranged onthe lower surface of the first layer of the liquid crystal panel in parallel; a third directional thin film and a column scanning electrode are sequentially arranged on the upper surface of the secondlayer of the liquid crystal panel in parallel; and a fourth directional thin film, a column signal electrode, a lower layer glass plate and a lower polarizer are sequentially arranged on the lower surface of the second layer of the liquid crystal panel in parallel. Double layers of structures are made into an optical switch plane array with independent controllable units; through the on / off control of a unit switch, the phase modulation is carried out on light beams passing through the unit switch; the plane array is matched with a grating array and a scanning drive circuit to form a laser array scanning device with an optical phased array function; and the orientation and pitching scanning and the depth focusing can be realized.

Description

technical field [0001] The invention relates to the technical field of optical phased arrays, in particular to a liquid crystal optical switch for optical phased array scanning control and an assembly manufacturing method. Background technique [0002] At present, with the rapid development of artificial intelligence technology, target detection, weapon guidance, unmanned driving, autonomous obstacle avoidance and other application fields urgently need a fast, accurate and all-round target detection technology. Radar is the most commonly used detection method. Compared with the radar of traditional mechanical scanning technology, phased array scanning technology uses a large number of independently controlled small antenna units arranged into an antenna array, and each antenna unit is controlled by an independent phase shift switch. By controlling the phases emitted by each antenna element, beams of different phases can be synthesized. Inspired by phase-controlled electroni...

AI Technical Summary

Problems solved by technology

[0003] When the existing common single-layer liquid crystal optical switch array is applied to the screen display, several column (or row) units in a row (or column) are strobed through the row and column signals, and then the scanning row (or column) is turned off. And scan the adjacent next row (or column) until the scanning operation of all rows (or columns) is completed. It cannot be used to realize the modulation of the beam phase, nor can it be used to cooperate with the grating array to realize the electronically controlled scanning and deep focus control of laser irradiation

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