Characteristics of liquid crystal lens with concentric ring electrode structure

The phase distribution within the liquid crystal layer of a liquid crystal lens is usually not an ideal parabolic structure, which limits the imaging application of liquid crystal lenses. Using an electrode structure designed based on the linear response region of liquid crystal, a liquid crystal lens is produced. By analyzing the front information of liquid crystal lens waves during operation, the optical power and optical aberration of the liquid crystal lens can be measured. In an imaging system composed of a camera module and a liquid crystal lens that performs a focusing function, quantitative research is conducted on the image formed after passing through the liquid crystal lens. The image of the ISO12233 icon formed by the imaging system is analyzed to obtain the resolution of the imaging system. The results show that the driving of the liquid crystal lens is simple, and the relationship between the optical power and the driving voltage difference is linear, which can be adjusted in the range of -4.9 to +5.2 D, and has a lower than 0.05. optical aberration. In the application of imaging systems, the liquid crystal lens exhibit excellent focusing performance with little impact on the resolution of the main lens.