An area-array electronically controlled liquid crystal light-diverging microlens chip driven by a dual-channel voltage signal

Abstract

The invention discloses an area array electric control liquid crystal light divergence micro-lens chip driven and controlled by double voltage signals. The chip comprises an electric control liquid crystal light divergence micro-lens array, a first drive and control signal input port and a second drive and control signal input port. Area array electric control liquid crystal light divergence micro lenses are m*n elements, wherein the m and the n are both integers which are larger than one. The electric control liquid crystal light divergence micro-lens array is of a liquid crystal sandwich structure and is sequentially provided with a first substrate, a common ground electrode layer, a first liquid crystal orientation layer, a liquid crystal layer, a second liquid crystal orientation layer, a top surface patterning electrode layer, a top layer inter-electrode insulating layer, a top surface electrode layer and a second substrate between the lower layer and the upper layer. The common ground electrode layer and the top surface electrode layer are fixed on the first substrate and the second substrate respectively. The top surface patterning electrode layer is formed by orderly arranging m*n holes. The area array electric control liquid crystal light divergence micro-lens chip is compact in structure, the double drive and control signals are loaded independently to quickly establish a micro light aperture array light field which can be further shaped exquisitely, the chip can be coupled with a conventional optics and optoelectronic mechanical structure easily, and thus the environmental adaptability is good.

Description

technical field [0001] The invention belongs to the technical field of optical precision measurement and control, and more specifically relates to an area-array electronically controlled liquid crystal light-diverging microlens chip driven and controlled by two-way voltage signals. Background technique [0002] So far, with the rapid development of electronically controlled liquid crystal microlens technology, liquid crystal astigmatism microlenses that can be electrically controlled and modulated based on the spatial distribution of refractive index can produce the equivalent of conventional light divergence microlenses with spherical or aspheric concave profiles. The light control performance of the optical fiber has been shown to play an increasingly important role in the construction of a smart optical system that can adjust the beam shape and aberration. Its typical characteristics are shown in the following aspects: (1) Based on the property of the electrically adjusta...

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Problems solved by technology

[0003] Although electronically controlled liquid crystal astigmatism microlenses have made significant progress in the development of small-sized and lightweight multifunctional optical beam conversion and imaging systems, as well as in the construction of arrayed imaging and detection photosensitive chips based on micro-nano controlled light, they are not used in special light fields. There are still obvious deficiencies in terms of generation and its rapid and fine regulation, such as: (1) Controlling micron-scale thickness liquid crystal materials based on voltage signal regulation of patterned electrodes, and the operation of electrically controlling the divergence of transmitted light waves is still rough , as a functionalized liquid crystal material, which is the key execution factor for constructing, modifying or modulating the spatial phase and energy transport form of the light field, its spatial distribution of refractive index still lacks the fine control ability, and its light control potential has not been fully realized. (2) It is impossible to establish a fine one-to-one quantitative comparison relationship based on control purposes with the optical parameters of the voltage signal and the light-diverging liquid crystal microlens such as focal length, point spread function, focal depth and field of view; ) Liquid crystal light-diverging microlenses with aspherical refractive index distribution form, lack of quantifiable voltage signal parameter characterization for electronically controlled aberration compensation and correction in the imaging process, and cannot accurately correct aberrations through fine control to truly play a technical role Advantage

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