Liquid crystal micro-optical structure and liquid crystal-based electric dimming light field imaging detection chip

Abstract

The invention discloses a liquid crystal micro-optical structure and a liquid crystal-based electric dimming light field imaging detection chip, and belongs to the field of optical imaging detection. The liquid crystal micro-optical structure comprises a liquid crystal material layer, and a patterned electrode layer and a common electrode layer which are respectively arranged on the two sides of the liquid crystal material layer. The patterned electrode layer is composed of a conductive film, electrode micropores distributed in an array are formed in the conductive film, the electrode micropores with different apertures are alternately arranged, and the electrode micropores with the same aperture are periodically arranged. When the mean square amplitude of a signal voltage applied between the patterned electrode layer and the common electrode layer is higher than a mean square amplitude threshold, liquid crystal molecules in the liquid crystal material layer under the electrode micropores with different apertures are in different spatial arrangement forms, so that gradient refractive index distribution corresponding to the periodic alternating array distribution is formed in the liquid crystal material layer, and the liquid crystal micro-optical structure has a plurality of focal lengths at the same moment. The multiple focal lengths can expand the field depth range for the second time, so that objects in a wider depth range in a view field can be clearly imaged.

Description

technical field [0001] The invention belongs to the field of optical imaging detection, and more specifically relates to a liquid crystal micro-optical structure and a liquid crystal-based electric modulation light field imaging detection chip. Background technique [0002] As an emerging imaging modality, light field imaging technology has triggered a new wave of research and entered the consumer market in 2012. Conventional imaging methods use the main lens to project the 3D scene onto the 2D detector plane, which directly causes the loss of the original depth information. Light field imaging can obtain four-dimensional space and angle information of a three-dimensional object space scene by adding a layer of microlens arrays between the main lens and the detector. Light field imaging has the unique advantage of "shooting first, focusing later", and can realize multiple imaging applications such as multi-view imaging, digital refocusing, full-focus imaging, depth estimati...

AI Technical Summary

Problems solved by technology

However, the existing liquid crystal microlens can only achieve one focal length in one optical imaging process, and the ability to expand the depth of field is relatively low.

Images