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Beam scanner and scanning method thereof

A technology of beam scanning and beam scanning, which is applied in the field of beam scanning, can solve problems such as limited efficiency, high cost, and bulky volume, and achieve the effects of overall performance improvement, convenient deployment and operation, and simple and practical structure

Inactive Publication Date: 2019-08-23
SHENZHEN LUBANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology faces many disadvantages, including complex overall device, bulky size, difficult operation, limited efficiency, small controllable angle range, and high cost.

Method used

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  • Beam scanner and scanning method thereof
  • Beam scanner and scanning method thereof

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Effect test

Embodiment 1

[0021] This embodiment discloses a beam scanner, which includes a beam converting device and at least one polarization grating.

[0022] The light beam conversion device is used to uniformly convert the light beam emitted by the light source into left-handed or right-handed circularly polarized light and provide it to an adjacent stage of polarization grating.

[0023] Each of the polarization gratings realizes beam diffraction and deflection by controlling the periodic arrangement of material molecules; and the transmission spectrum is concentrated in the first order of diffraction, and the deflection angle of the outgoing beam is the vector superposition of the incident angle of the beam and the diffraction angle of the polarization grating.

[0024] The rotating device is used to drive the corresponding single or at least two polarization gratings to rotate, and then drive the rotation of the diffraction angle of the polarization grating, so that the outgoing light of each l...

Embodiment 2

[0034] Corresponding to the above device embodiments, this embodiment discloses a beam scanning method, including:

[0035] Step S1, deploying a beam conversion device and at least one-stage polarization grating on the optical path; each of the polarization gratings realizes beam diffraction and deflection by controlling the periodic arrangement of material molecules, and the transmission spectrum is concentrated in the first-order diffraction order, and the outgoing beam is deflected The angle is the vector superposition of the incident angle of the beam and the diffraction angle of the polarization grating.

[0036] Step S2, the beam conversion device uniformly converts the beam emitted by the light source into left-handed or right-handed circularly polarized light and provides it to an adjacent stage of polarization grating.

[0037] Step S3 , drive the corresponding single or at least two polarization gratings to rotate by the rotating device, and then drive the rotation o...

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Abstract

The invention relates to the technical field of beam scanning, and discloses a beam scanner and a scanning method thereof, which realize overall performance improvement by a new scanning method. The beam scanner of the invention comprises a beam converting device and at least one-level polarization grating, wherein the beam converting device is used for uniformly converting a beam emitted by a light source to left-handed or right-handed circularly polarized light to be supplied to an adjacent one-level polarization grating; each polarization grating realizes beam diffraction and deflection through controlling periodic arrangement of material molecules; a transmission spectrum is concentrated on a first-level diffraction level, and the deflection angle of an outgoing beam is vector superposition of a beam incident angle and a polarization grating diffraction angle; and a rotating device is also arranged for driving a corresponding single or at least two polarization gratings to rotate,the polarization grating diffraction angle is further driven to rotate, and the outgoing beam of each level rotates along with the corresponding polarization grating to generate displacement corresponding to continuous scanning.

Description

technical field [0001] The invention relates to the technical field of beam scanning, in particular to a beam scanner and a scanning method thereof. Background technique [0002] In recent years, beam deflection and scanning have attracted more and more attention from all walks of life, and have always been a hot spot in contemporary research. Beam deflection technology plays a very critical role in various aspects of production and life. Including: laser radar, laser processing, laser communication and other fields, so the research on beam deflection and scanner has important practical significance. [0003] In the prior art, a motor is often used to rotate the prism to control the deflection direction of the light beam. However, this technology faces many disadvantages, including complex overall device, bulky size, difficult operation, limited efficiency, small controllable angle range, and high cost. Contents of the invention [0004] The purpose of the present inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/10G02B26/08
CPCG02B26/0808G02B26/106
Inventor 张礼朝李晓春
Owner SHENZHEN LUBANG TECH CO LTD
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