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Small concave imaging device and imaging method based on liquid crystal lens

A liquid crystal lens, concave imaging technology, applied in the field of optical imaging, can solve the problems of low pixels and limited data transmission, and achieve the effect of small size and good flexibility

Active Publication Date: 2022-04-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the current field of photography, the resolution of optical lenses has reached tens of millions of pixels, but in real-time video transmission, often only a few million pixels can be transmitted, or even lower, which is mainly limited by the amount of data transmission
Even if tens of millions of cameras are used as video recording devices, in real-time transmission, high-pixel video streams are often compressed by all high compression ratios, resulting in much lower actual pixels

Method used

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  • Small concave imaging device and imaging method based on liquid crystal lens
  • Small concave imaging device and imaging method based on liquid crystal lens
  • Small concave imaging device and imaging method based on liquid crystal lens

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Experimental program
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Effect test

Embodiment 1

[0052] Please refer to figure 2 , the liquid crystal lens-based fovea imaging device according to Embodiment 1 of the present invention includes: a liquid crystal lens assembly 20 , a lens assembly 10 with a large field of view, an image sensor 40 and an image processor 50 . The liquid crystal lens assembly 20 is located between the large field of view lens assembly 10 and the image sensor 40 . The liquid crystal lens assembly 20 includes a liquid crystal lens unit 201 and a drive control unit 202, wherein the liquid crystal lens assembly 20, that is, the aperture of the liquid crystal lens unit 201 is smaller than the aperture of the large viewing angle lens assembly 10, and the large viewing angle The field angle lens assembly 10 images a scene in the field of view, and the liquid crystal lens assembly 20 focuses on a specified partial scene in the scene to form a focused image.

[0053] The liquid crystal lens unit 201 in this embodiment is a non-array liquid crystal lens...

Embodiment 2

[0066] The dimple imaging device based on the liquid crystal lens in the second embodiment of the present invention is different from the first embodiment in that: the liquid crystal lens unit 201 is a liquid crystal lens array including a plurality of sub-lenses.

[0067] In one focusing mode, the drive control unit 202 controls the sub-lens corresponding to the local scene imaging area in the liquid crystal lens array to focus on the local scene to generate a local focus image;

[0068] In a specific implementation process, the liquid crystal lens unit 201 may use an M*M liquid crystal lens array; then the overall image display area is correspondingly divided into M2 sub-areas, and each sub-area may overlap to a certain extent. Taking a 3*3 liquid crystal lens array as an example, the overall display area is divided into nine sub-regions, and each sub-region corresponds to a sub-lens in the liquid crystal lens array. Controlling the sub-lens corresponding to the local scene ...

Embodiment 3

[0072] Embodiment 3 of the present invention is based on the liquid crystal lens-based dimple imaging device of the foregoing embodiments 1 and 2, and accordingly proposes a liquid crystal lens-based dimple imaging method, such as Image 6 As shown, the method includes:

[0073] S1. Controlling the large field of view lens assembly to image a scene within a field of view;

[0074] S2. Control the liquid crystal lens assembly to focus on a specified local scene in the scene to form a focused image.

[0075] In one embodiment, the liquid crystal lens assembly includes a liquid crystal lens unit and a drive control unit, the liquid crystal lens unit is a non-array liquid crystal lens, and the non-array liquid crystal lens can be configured according to the direction along the optical axis or perpendicular to the optical axis. The local scene imaging area moves, and the controlling the liquid crystal lens assembly to focus on the specified local scene in the scene to form focused...

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Abstract

The embodiment of the invention discloses a small concave imaging device and an imaging method based on a liquid crystal lens. The small concave imaging device includes: a large field of view lens assembly, an image sensor and an image processor, and a liquid crystal lens assembly located between the large field of view lens assembly and the image sensor, the aperture of the liquid crystal lens assembly Smaller than the aperture of the large-field-of-view lens assembly, the large-field-of-view lens assembly images a scene within a field of view, and the liquid crystal lens assembly focuses on a specified partial scene in the scene to form a focused image. The invention solves the imaging requirement of large field of view and high resolution at the same time, and has the advantages of large field of view, high-definition region of interest, and simple structure.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a small concave imaging device and imaging method based on a liquid crystal lens. Background technique [0002] At present, in the technical fields such as target tracking and positioning, and scanning recognition, fast and lightweight imaging systems with large field of view and high resolution are increasingly valued. In traditional imaging systems, the larger the field of view, the worse the imaging quality at the edge of the field of view. Such as figure 1 As shown, in order to balance the overall image quality, the position with the best overall image quality is usually selected as the image plane instead of selecting the best image plane for a single field of view. Depend on figure 1 It can be found that in traditional imaging systems, in order to achieve a large field of view, the resolution in some areas is often sacrificed. In traditional optical imaging syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/13G02F1/133H04N5/225
CPCG02F1/1313G02F1/133H04N23/55
Inventor 叶茂王思聪陈晓西
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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