Infrared liquid crystal phased array chip

Abstract

The invention discloses an infrared liquid crystal phased array chip. The chip comprises an electric control liquid crystal phase modulation microcolumn array; the electric control liquid crystal phase modulation microcolumn array comprises a liquid crystal material layer, a liquid crystal initial orientation layer, an electric isolation layer, a patterned electrode layer, a substrate and an infrared antireflection film which are sequentially arranged on the upper surface of the liquid crystal material layer, and a liquid crystal initial orientation layer, an electric isolation layer, a public electrode layer, a substrate and an infrared antireflection film which are sequentially arranged on the lower surface of the liquid crystal material layer; the patterned electrode layer is composed of sub-electrodes which are distributed in an arrayed manner, and each sub-electrode is composed of square or rectangular conductive films; the electric control liquid crystal phase modulation microcolumn array is divided into electrode control liquid crystal phase modulation microcolumns which are distributed in an arrayed manner, the electrode control liquid crystal phase modulation microcolumns correspond to the sub-electrodes one by one, and the rate of the area of each sub-electrode to the optical receiving area of the corresponding electrode control phase crystal phase modulation microcolumn is 50-95 percent. The chip can realize the functions of electric control beam expanding, beam contracting, debunching, beam concentrating, beam tuning, beam scanning and the like, is easy to couple with other infrared optical and photoelectric mechanical structures and has good optical field adaptability.

Description

technical field [0001] The invention belongs to the technical field of infrared beam precision measurement and control, and more specifically relates to an infrared liquid crystal phased array chip. Background technique [0002] So far, based on the electromagnetic wave phase modulation technology, the radio frequency phased array technology that realizes the arbitrary shape construction of the electromagnetic beam, adjustable direction projection, electronically controlled space scanning, specific orientation or airspace beam condensation, etc., has shown strong performance in the radar field. It has become a research and development hotspot in infrared beam engineering to find a method for electromagnetic beam phase modulation suitable for infrared bands, and to realize beam building, beam projection, and beam space scanning functions similar to radio frequency electromagnetic waves. With the continuous and rapid development of infrared beam technology and the continuous e...

AI Technical Summary

Problems solved by technology

The main technical defects are manifested in the following aspects: (1) The volume, mass and inertia of the optical and auxiliary actuators are large, the function is relatively single, and a relatively complicated drive and control device needs to be configured, the response is slow, and the state transition time is long. Continuity makes it difficult to construct, switch or jump the beam state arbitrarily; (2) The infrared optical components used such as typical prisms, lenses, reflectors and astigmatism mirrors, as well as the various optical films produced such as typical Reflective, anti-reflective and semi-reflective and semi-transparent films, etc., all have a relatively narrow spectral range of application, and there are chromatic aberrations or aberrations that are difficult to completely offset with changes in infrared spectral components

Beam space scanning is often realized based on the reciprocating mechanical translation between the pendulum mirror or the microlens array. There is a single scanning mode constrained by special rotation or translation, limited performance indicators, large mechanical inertia, and relatively complex auxiliary drives. control device, the state change is slow, the beam scanning operation can only be carried out in accordance with the set order, and any form of beam scanning cannot be realized, regional cohesion and scanning are difficult to coexist or fast switching and other defects

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