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Double-frequency liquid crystal cone lens, control method, adjusting device and laser shaping device

A dual-frequency liquid crystal and adjustment device technology, which is applied in optics, optical components, nonlinear optics, etc., can solve the problem of short maximum non-diffraction distance of Bessel-Gaussian beam, excessive minimum base angle value of axicon lens, and minimum axicon lens The bottom corner cannot be adjusted quickly and in real time to achieve the effect of real-time adjustment

Pending Publication Date: 2022-03-25
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention provides a dual-frequency liquid crystal axicon and its control method, a minimum base angle adjustment device, and a laser shaping device to solve the problem that the minimum base angle of the axicon lens in the prior art is too large, resulting in a cone The maximum non-diffraction distance of the Bessel-Gaussian beam generated by the lens is short, and the technical problem that the minimum bottom angle of the axicon lens cannot be adjusted quickly and in real time

Method used

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  • Double-frequency liquid crystal cone lens, control method, adjusting device and laser shaping device
  • Double-frequency liquid crystal cone lens, control method, adjusting device and laser shaping device
  • Double-frequency liquid crystal cone lens, control method, adjusting device and laser shaping device

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Embodiment 1

[0039] Such as figure 2 As shown, this embodiment provides a dual-frequency liquid crystal cone lens, the dual-frequency liquid crystal lens includes a first electrode 21, a liquid crystal layer, a second electrode 22, and a third electrode 23 arranged in sequence along the light-passing direction;

[0040] The first electrode 21 layer is a transparent electrode, the second electrode 22 is a hole-shaped electrode, the third electrode 23 is a transparent electrode, and the liquid crystal layer is a dual-frequency liquid crystal layer 30; the dual-frequency liquid crystal layer 30 is located at between the first electrode 21 and the second electrode 22 .

[0041] The circular hole-shaped electrode is an electrode with a circular through-hole in the middle, and the axial direction of the circular through-hole is the aforementioned light-passing direction. The first electrode 21 can be a transparent electrode, such as ITO electrode or AZO electrode, and the second electrode 22 c...

Embodiment 2

[0051] In this embodiment, on the basis of Embodiment 1, the value ranges of v1 and v2 are further limited. In this embodiment, the voltage values ​​of the first driving voltage v1 and the second driving voltage v2 satisfy: 0≤v2≤40, 0≤v1≤v2×3 / 4+30, wherein the unit of v1 and v2 is V.

Embodiment 3

[0054] Such as Figure 4 As shown, for the dual-frequency liquid crystal axicon in embodiment 1 or embodiment 2, the present embodiment provides a minimum base angle adjustment device for a dual-frequency liquid crystal axicon to adjust the minimum base angle of the aforementioned dual-frequency liquid crystal axicon, said The adjustment device includes a driving power supply and the dual-frequency liquid crystal axicon lens described in any one of claims 1 or 2, the driving power supply includes a first voltage output module and a second voltage output module, and the output of the first voltage output module is The frequency of the voltage is different from the frequency of the voltage output by the second voltage module, the first voltage output module is used to output the first driving voltage, and the second voltage output module is used to output the second driving voltage.

[0055] The device for adjusting the minimum bottom angle of the dual-frequency liquid crystal a...

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Abstract

The invention belongs to the technical field of lenses, and particularly relates to a double-frequency liquid crystal cone lens, a control method, an adjusting device and a laser shaping device. The double-frequency liquid crystal cone lens comprises a first electrode, a liquid crystal layer, a second electrode and a third electrode, the liquid crystal layer is a double-frequency liquid crystal layer; in the direction perpendicular to the plane where the first electrode is located, the distance between the first electrode and the second electrode is D1, the distance between the second electrode and the third electrode is D2, D2 is larger than or equal to 0 and smaller than or equal to 0.4, D1 is larger than or equal to 0.3 + D2 / 2 and smaller than or equal to 0.7-D2 / 2, and the unit of D1 and D2 is mm; a first driving voltage v1 is received between the second electrode and the first electrode, a second driving voltage v2 is received between the third electrode and the first electrode, and the frequency of the first driving voltage is different from that of the second driving voltage. According to the invention, the minimum base angle of the conical lens can be adjusted in real time, and the minimum base angle smaller than that in the prior art can be obtained.

Description

technical field [0001] The invention belongs to the technical field of lens technology, in particular to a dual-frequency liquid crystal cone lens, a control method, an adjustment device and a laser shaping device. Background technique [0002] An axicon is an optical element that refracts incident light at a certain angle. Utilizing the interference and diffraction between the light beams refracted by the axicon, the focal line of the axicon can be made very long, and a long focal line can be generated along the optical axis. The Gaussian beam passing through the axicon has a uniform intensity distribution on the focal line. The aforementioned characteristics of the axicon lens make it widely used, such as for highly sensitive fluorescence measurement, for generating non-collinear harmonics, for nanoparticle screening, and using an axicon lens instead of a ball lens to solve the defocus problem , using the axicon lens to obtain the depth information of an imaging object, ...

Claims

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Application Information

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IPC IPC(8): G02F1/29G02F1/133G02B27/09
CPCG02F1/294G02F1/13306G02B27/0955G02B27/0927
Inventor 陈晓西谭奇璞周心晨张亚磊叶茂
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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