Infrared beam control chip based on electronically controlled liquid crystal infrared diverging flat microlenses

Abstract

The invention discloses an infrared beam control chip based on an electric control liquid crystal infrared divergence planar micro lens. The chip comprises an electric control liquid crystal infrared divergence planar micro lens array, wherein the electric control liquid crystal infrared divergence planar micro lens array comprises a liquid crystal material layer, a first liquid crystal initial orientation layer, a first electrical isolation layer, a graphical electrode layer, a first substrate, a first infrared antireflection film, a second liquid crystal initial orientation layer, a second electrical isolation layer, a common electrode layer, a second substrate and a second infrared antireflection film, the first liquid crystal initial orientation layer, the first electrical isolation layer, the graphical electrode layer, the first substrate and the first infrared antireflection film are sequentially arranged on the upper surface of the liquid crystal material layer, the second liquid crystal initial orientation layer, the second electrical isolation layer, the common electrode layer, the second substrate and the second infrared antireflection film are sequentially arranged on the lower surface of the liquid crystal material layer, the common electrode layer is composed of a homogeneous conducting film layer, the graphical electrode layer is composed of sub-electrodes distributed into an m*n element array, and each sub-electrode is composed of a round or square conducting film. The chip can achieve electric control formation and fine modulation of infrared beams of specific forms, can be easily matched and coupled with other infrared optical and photoelectric structures, electronic and mechanical devices and the like, and is good in environmental suitability.

Description

technical field [0001] The invention belongs to the technical field of precision measurement and control of infrared beams, and more specifically relates to a light control chip based on an electronically controlled liquid crystal infrared divergence plane microlens array for modulating the shape of infrared beams. Background technique [0002] A beam is a visual representation of the energy flow transport direction of an optical field during propagation. Controlling the shape of infrared beams is a basic link to realize efficient transmission of infrared energy, improve the efficiency of infrared laser processing, enhance the efficiency of infrared imaging detection, improve infrared anti-jamming and attack capabilities, and environmental adaptability. Generally speaking, the shape of infrared beams is closely related to its energy transport behavior, effectiveness, and utilization methods in the space-time domain. Typical cases such as Gaussian laser beams can show good l...

AI Technical Summary

Problems solved by technology

[0004] The defects of the existing infrared beam control methods are mainly manifested in the following aspects: (1) The optical system composed of a fixed-shape lens or lens group can only construct an outgoing beam with a fixed shape, and the beam is modulated by mechanical movement between the lenses It has slow response, high power consumption, and requires a relatively complex auxiliary driving device; (2) The spatial light modulator is based on the tilt modulation or phase delay of the sub-plane wavefront formed by the discretization operation, and is constructed by micro-mechanical movement. The outgoing beam of limited form has restrictive influences such as response time, mechanical inertia, and mechanical motion that must meet the continuity conditions; (3) The diffractive phase structure is based on a limited degree of phase delay for the divided sub-wavefronts, which can only Form a limited and non-adjustable outgoing wave field; (4) By constructing a complex optical path for multi-beam interference shaping, only a limited form of composite wave field can be obtained; (5) Due to reasons such as volume, quality and working mode, the current mainstream It is generally difficult to flexibly connect the beam control device to the optical path or couple with other optical and optoelectronic structures, and cannot be used for complex or special beam construction and dynamic modulation.

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