Two-dimensional liquid crystal laser deflector

Abstract

The invention discloses a two-dimensional liquid crystal laser deflector. The two-dimensional liquid crystal laser deflector comprises multiple layers of devices which are sequentially stacked, and each layer of device sequentially comprises an upper substrate, a liquid crystal molecular layer and a lower substrate; each upper substrate sequentially comprises upper substrate glass, an upper ITO conducting layer and an upper orientation layer from top to bottom, and each lower substrate sequentially comprises a lower orientation layer, a lower ITO conducting layer and lower substrate glass from top to bottom; the liquid crystal molecular layer is located between the upper substrate and the lower substrate, and spacers are sprayed in the liquid crystal molecular layer for supporting; the edge of the upper substrate and the edge of the lower substrate are sealed and packaged through frame glue and are attached and cured in an aligned mode. According to the invention, the deflection angles theta x and theta y of emergent light in the x and y directions can be adjusted by changing the widths dx and dy of the sub-regions in the x and y directions, changing the thickness of the liquid crystal molecular layer and changing the magnitude of the loading voltage so as to realize two-dimensional space scanning of light beams, and the two-dimensional liquid crystal laser deflector has the advantages of high deflection precision, high response speed, simple driving control and simple structure.

Description

technical field [0001] The invention belongs to the field of liquid crystal optoelectronic device technology and liquid crystal optical phased array space scanning technology, and specifically discloses a two-dimensional liquid crystal laser deflector. Background technique [0002] With the rapid development of research fields such as laser radar and space optical communication in laser technology, and laser control technology is the core technology in these fields, it has great influence on the volume, weight, power consumption, response speed and deflection accuracy of the beam scanning device. This is an extremely demanding requirement. The existing laser control technology can be divided into two categories: one is the mechanical scheme using mechanically rotating optical components, and the other is the non-mechanical scheme using electro-optic or acousto-optic modulation devices. At present, liquid crystal optical phased array is the mainstream solution of non-mechani...

AI Technical Summary

Problems solved by technology

[0003] At present, the control of the existing two-dimensional optical phased array is very complicated and has shortcomings such as deflection accuracy and low response speed.

For example: the traditional two-dimensional optical phased array with M×N array elements requires M×N independent control units; the traditional periodic blazed grating model can only achieve a limited deflection angle for two-dimensional beam deflection; A two-dimensional beam scanning method based on a planar phased array, but the rotation angle will affect the two-dimensional deflection accuracy, etc.

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