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Helicon wave demonstration instrument

A demonstrator, helicon wave technology, applied in the field of helicon wave demonstrator, can solve the problem of no helicon wave

Inactive Publication Date: 2010-06-09
杨晶
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no model demonstrator about helicon wave in China.

Method used

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  • Helicon wave demonstration instrument
  • Helicon wave demonstration instrument
  • Helicon wave demonstration instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Example: a structure such as figure 1 As shown, the present invention comprises He-Ne laser 1, beam expander 2 and laser projector 3, wherein, described He-Ne laser, beam expander and laser projector are fixed on the base track 4 in sequence, wherein laser projection The device 3 is connected with the base track through the moving seat, and the base track 4 and the projection teaching screen 5 are on the same straight line. The center of the projection screen is at the same horizontal position as the laser emitter.

[0019] Such as figure 2 Diffraction grating production: Since helical waves are to be generated, only characteristic diffraction gratings with optical forks are required, and the position and opening angle of the grating are strictly required. It is recommended to directly figure 2 copy. The specific production method is to figure 2 Copy it to the computer and use a laser printer to print it on a teaching slide, and keep the distance between the grat...

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Abstract

The invention discloses a spiral wave demonstration instrument, which belongs to the technical field of manufacture of experimental instruments. The spiral wave demonstration instrument comprises a He-Ne laser, a beam expander and a laser projector which are fixed on a base track in turn, wherein the laser projector is connected with the base track through a movable seat, and the base track and aprojection screen are positioned on the same straight line. The center of the projection screen and a laser emitter are positioned on the same horizontal position. A power supply is switched on, the laser is opened, and a position of a diffraction grating is adjusted through observing diffraction patterns on the screen. The spiral wave demonstration instrument has intuitive performance to make students understand the advantages of spiral wave and the like more profoundly and so on, not only can finish demonstration of the spiral wave, but also can achieve the demonstration of other diffractionlight through replacing the grating.

Description

technical field [0001] The invention discloses a helical wave demonstration instrument, which belongs to the technical field of manufacturing teaching and experiment instruments. Background technique [0002] A light beam has orbital angular momentum (which defines the shape of the wavefront) in addition to its color (depending on the wavelength of the electromagnetic wave) and polarization (wave directionality) properties. Ten years ago, optical researchers discovered this characteristic of light, but due to various reasons, this discovery has always been limited to a small circle of experts [see "Magical Light Hand" in the 10th issue of 2003 of this magazine] and has not been publicized . Even astronomers, who most need to exploit all possible properties of light, hardly notice this. [0003] The study of the characteristics of light is one of the most basic contents in college physics courses, and related demonstration experiments are of great significance for students ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09B23/22
Inventor 杨晶许福运
Owner 杨晶