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Michelson interferometer control device and control method

A technology of a control device and a control method, which is applied to measurement devices, instruments, scientific instruments, etc., can solve the problems of interference fringe shaking in the field of view, affecting the accuracy of counting, weak anti-interference ability, etc., achieving a simple and practical structure and improving accuracy. The effect of high degree and convenient operation

Active Publication Date: 2014-12-03
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method is to count hundreds of interference fringes manually. The disadvantages of this counting method are: (1) eye fatigue
(2) The stability is not high (the interference fringe shakes slightly, it cannot be counted)
(3) error-prone
However, the defect of this system is that the anti-interference ability is weak. Once the external disturbance occurs, the interference fringes in the field of view will shake, which will affect the accuracy of counting.

Method used

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  • Michelson interferometer control device and control method
  • Michelson interferometer control device and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 The illustrated embodiment is a Michelson interferometer control device. The Michelson interferometer is installed on a frame and includes a photoelectric sensor circuit 1, a controller 2, a motor 3, a display 4, and a Michelson interferometer. The copper sheet on the drum, the drum rotation detection circuit 5 corresponding to the copper sheet arranged on the frame close to the drum; the controller is respectively electrically connected with the photoelectric sensor circuit, the drum rotation detection circuit, the motor and the display; The motor is connected with the drum, and the photoelectric sensor circuit is arranged on the frame close to the observation screen of the Michelson interferometer; the motor is a DC geared motor. The photoelectric sensor circuit includes a light detection circuit, an amplifying circuit and a shaping circuit connected in sequence; the light detection circuit includes a photoresistor, an operational amplifier and three re...

Embodiment 2

[0051] Example 2 includes all the structural parts and steps of Example 1; and also includes the following steps:

[0052] Such as image 3 As shown, in step 500, manually observe and read the number of drum rims on the two photos on the display screen. The number of drum rims on the two photos are 1.5 and 7.6 respectively, then manually calculate △d=7.6- 1.5=6.1; Substitute N=900,△d=6.1 into the formula , Get λ=1.36×10 7 Nanometer; so far we get the more accurate wavelength of the measured light wave.

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Abstract

The invention discloses a Michelson interferometer control device and control method. A Michelson interferometer is arranged on a rack and comprises a photoelectric sensor circuit, a controller, a motor, a display, a copper piece arranged on a drum of the Michelson interferometer and a drum momentum detection circuit which is arranged on the rack close to the drum and is corresponding to the copper piece; the Michelson interferometer control device is respectively electrically connected with the photoelectric sensor circuit, the drum momentum detection circuit, the motor and the display; the motor is connected with the drum, and the photoelectric sensor circuit is arranged on the rack of an observation screen close to the Michelson interferometer; and the motor is a direct current speed reduction motor. The Michelson interferometer control device and control method disclosed by the invention have the characteristics that wavelength measurement accuracy of light wave is effectively improved, labour intensity of a measurer is reduced, measuring efficiency is improved, structure is simple, operation is easy and a measuring result can be visually displayed.

Description

Technical field [0001] The invention relates to a control device of a measuring device, in particular to a Michelson interferometer control device and a control method which can effectively improve the measurement accuracy and measurement efficiency of light wave wavelength. Background technique [0002] The Michelson interferometer is usually used to measure the wavelength, refractive index, thickness, and concentric interference fringes of light waves. [0003] When using a Michelson interferometer to measure interference fringes, hundreds of interference fringes passing through the field of view need to be counted. The traditional method is to manually calculate hundreds of interference fringes. The disadvantages of this counting method are: (1) Eye fatigue. (2) The stability is not high (the interference fringe will not be counted if it shakes slightly). (3) Error-prone. In order to improve the accuracy of the measurement, a method of multiple measurements is usually adopted...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J9/02
Inventor 陶丽芳
Owner ZHEJIANG OCEAN UNIV
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