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A control device and control method based on Gus Hansen displacement

A technology of regulating device and displacement, applied in measuring devices, optical devices, instruments, etc., can solve problems such as obstructing direct observation

Active Publication Date: 2022-04-12
CHENGDU UNIV OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Normally, the GH shift is on the order of wavelength, which hinders direct observation in a single reflection, and cannot directly regulate the Gus-Hansen shift

Method used

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  • A control device and control method based on Gus Hansen displacement
  • A control device and control method based on Gus Hansen displacement
  • A control device and control method based on Gus Hansen displacement

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Embodiment 4

[0128] This embodiment is based on the second embodiment and the third embodiment, and discloses a control method of the control device based on the Gus-Hansen displacement, such as image 3 and Figure 4 as shown, image 3 It is when the magnetic field size B=10T, the incident frequency is 5THz, and the Fermi energy level is E F Under the experimental conditions of 0.4eV and relaxation time τ of 1ps, the change of conductivity and S GH exhibits an approximately linear relationship. As the conductivity increases, SGH decreases approximately linearly, as Figure 4 As shown, it is when the incident angle is 41.2 degrees, the incident frequency is 5THz, and the Fermi energy level is E F is 0.4eV, the relaxation time τ is 1ps, and the magnification angle Under the condition of , the electrical conductivity of the insulating state and the metallic state are σ=200S / m and σ=200000S / m respectively, the relationship between the Gus-Hansen displacement and the magnetic field stren...

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Abstract

The invention discloses a control device and a control method based on Gus-Hansen displacement. Both the first lens and the second lens are focusing lenses, and the first lens and the second lens are confocally arranged; the first lens and the second lens And the first polarizer is arranged sequentially along the direction of the laser output light source, and the light source enters the prism after passing through the first polarizer; the quarter wave plate, the half wave plate and the second polarizer are arranged sequentially along the direction of the light source after the reflection of the prism, and The light source enters the image sensor after passing through the second polarizer; the electromagnet is arranged above and / or below the prism, and the magnetic induction direction is perpendicular to the vertical axis of the prism; the inclined surface of the prism is fitted with a one-dimensional photonic crystal; A heating plate is provided; the beneficial effect of the present invention is that under the environment of magnetic field strength, the temperature can be determined by using the amplified Goose Hansen displacement value of weak measurement; displacement to determine the magnetic field strength.

Description

technical field [0001] The invention relates to the field of optical displacement measurement, in particular to a control device and control method based on Gus-Hansen displacement. Background technique [0002] The Goose-Hansen shift (GH) refers to the lateral offset parallel to the incident plane of the center of the reflected beam relative to the center of the incident beam at the interface of two media. This shift is due to the phase change produced by each plane wave that makes up the beam, and was discovered experimentally by Gus-Hansen in 1947. Usually, the GH shift is on the order of wavelength, which hinders the direct observation in a single reflection, and the purpose of directly adjusting the Gus-Hansen shift cannot be achieved. Contents of the invention [0003] The object of the invention of the present invention is to: aim at the above-mentioned existing problems, provide a kind of control device and control method based on Goose-Hansen displacement, after ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/02G02F1/01
CPCG01B11/02G02F1/01
Inventor 唐婷婷余博毛英慧李朝阳沈健
Owner CHENGDU UNIV OF INFORMATION TECH
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