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Three-dimensional optical field adjusting and controlling device

A control device, three-dimensional technology, applied in the direction of optics, optical components, instruments, etc., can solve the problems of not using vector beam focusing and unsatisfactory light field distribution, and achieve the effect of low component cost, simple structure and easy operation

Active Publication Date: 2013-10-02
BEIJING GUOWANG OPTICAL TECH CO LTD
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Problems solved by technology

Although this method can realize the movement and change of optical tweezers, but this method does not use vector beam focusing, so the obtained optical field distribution is not ideal

Method used

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  • Three-dimensional optical field adjusting and controlling device
  • Three-dimensional optical field adjusting and controlling device

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Embodiment Construction

[0021] In order to clarify the technical solutions and advantages of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Please refer to the attached figure 1 , with figure 1 It is a schematic structural diagram of the three-dimensional light field control device of the present invention. The three-dimensional light field control device of the present invention includes a laser 101, a polarizer 201, a diffractive optical element 301, a Fourier transform lens 401, a radial polarization converter 501, an amplitude type zone plate 601 and a high numerical aperture focusing lens 701; The double-ring Laguerre-Gauss beam forming unit includes: a laser 101 , a polarizer 201 , a diffractive optical element 301 and a Fourier transform lens 401 .

[0023] The positional relationship of the above components is as follows:

[0024] Along the beam direction emitted by the laser 101, there ...

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Abstract

A three-dimensional optical field adjusting and controlling device comprises a laser, wherein a polarizer, a diffraction optical element, a Fourier transforming lens, a radial polarized light converter, an amplitude type wave zone plate and a highly-numerical aperture focusing lens are coaxially arranged in sequence in the direction of a light beam emitted by the laser; the diffraction optical element and the radial polarized light converter are respectively arranged on the front focal plane and the rear focal plane of the Fourier transforming lens. The three-dimensional optical field adjusting and controlling device can achieve a three-dimensional optical field with long focal depth, sub-wavelength and controllability.

Description

technical field [0001] The invention relates to beam shaping, in particular to a three-dimensional light field regulating device. Background technique [0002] In recent years, the long focal depth and sub-wavelength three-dimensional light fields have attracted extensive attention due to their applications in particle control, material processing, and high-resolution optical imaging. When radially polarized light is focused at a large numerical aperture, the longitudinal field component at the focal point is much stronger than the transverse field component. This characteristic can be used in high-resolution microscopy, fiber lithography, and nonlinear optics. [0003] At present, many scholars at home and abroad have done a lot of research on the focusing characteristics of vector beams by using the Richards-Wolf vector diffraction integral theory. The local hollow beam refers to a region with zero intensity in the propagation direction of the beam, and the three-dimensio...

Claims

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Application Information

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IPC IPC(8): G02B27/09G02B27/28
Inventor 朱菁葛丹丹宋强李兆泽张方曾爱军黄惠杰杨宝喜陈明李璟
Owner BEIJING GUOWANG OPTICAL TECH CO LTD
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