Liquid crystal lens imaging method

Abstract

The invention provides a liquid crystal lens imaging method, comprising: driving a liquid crystal lens to be in a first state, using a first optical signal which passes through the liquid crystal lens at the moment of the first state, generating a first lighting graph corresponding to the first optical signal according to the first optical signal; driving the liquid crystal lens to be in a second state, using a second optical signal which passes through the liquid crystal lens at the moment of the second state, generating a second lighting graph corresponding to the second optical signal according to the second optical signal; processing the first lighting graph and the second lighting graph, using the lighting graph obtained by processing as a final lighting graph; and according to the final lighting graph, generating a final digital image signal. Through processing the lighting graphs, the liquid crystal lens imaging method finally obtains the digital image signal, so as to prevent error problems caused by calculation just aimed at the linear response interval of an imaging sensor when the digital image signal is directly used for processing. Thus, a calculation result of the lighting graph is improved.

Description

Technical field [0001] The present invention relates to the technical field of lens imaging, in particular to a method for imaging a liquid crystal lens. Background technique [0002] Due to the anisotropy of liquid crystal materials, liquid crystal devices usually only correspond to polarized light; when liquid crystal lenses are used in imaging equipment, a polarizing device, such as a polarizer, is required to make the incident light linearly polarized. However, the use of polarizers will reduce the light intensity to less than half of the initial intensity value. In this way, in a darker environment, it is possible that the amount of light reaching the image sensor is insufficient, causing the signal-to-noise ratio to drop and reducing the image quality. [0003] In order to avoid the use of polarizers, a liquid crystal lens can be formed by stacking a plurality of liquid crystal lenses whose initial alignments of the liquid crystal layer are perpendicular to each other in the...

AI Technical Summary

Problems solved by technology

[0004] (1) The multi-liquid crystal lens superposition scheme or the multi-liquid crystal layer superposition scheme greatly increases the production cost of the liquid crystal lens due to the increase in the number of liquid crystal lenses or liquid crystal layers

[0005] (2) Due to the increase in the number of liquid crystal lenses or liquid crystal layers, the thickness of the device is also greatly increased, making it difficult for liquid crystal lens imaging devices to be installed in mobile devices

[0006] (3) Due to the different positions of the liquid crystal lenses or liquid crystal layers in the system, the propagation behavior of the two components of polarized light is not completely consistent, which reduces the imaging quality of the system

[0007] (4) Using the above scheme for image processing is a purely digital arithmetic operation, which is only applicable to the image part in the linear response range of the image sensor, and not applicable to the part of the image in the nonlinear response range

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