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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 affecting the accuracy of counting, shaking of interference fringes in the field of view, weak anti-interference ability, etc., and achieves improved accuracy and simple structure. Practical and easy to operate

Active Publication Date: 2013-07-03
ZHEJIANG OCEAN UNIV
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  • 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 1The shown embodiment is a kind of Michelson interferometer control device, and described Michelson interferometer is arranged on the frame, comprises photoelectric sensor circuit 1, controller 2, motor 3, display 4, is located at Michelson interferometer The copper sheet on the drum, the drum rotation amount detection circuit 5 corresponding to the copper sheet arranged on the frame close to the drum wheel; the controller is electrically connected with the photoelectric sensor circuit, the drum wheel rotation amount detection circuit, the motor and the display respectively; 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 photodetection circuit, an amplifying circuit and a shaping circuit connected in sequence; the photodetection circuit includes a photosensitive re...

Embodiment 2

[0051] Embodiment 2 includes all structural parts and step parts in Embodiment 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 circles on the two photos on the display screen, and the number of drum circles on the two photos are 1.5 circles and 7.6 circles 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; this yields the more precise wavelength of the light wave being measured.

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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 that can effectively improve the measurement accuracy and efficiency of light wave wavelength. Background technique [0002] Michelson interferometers are usually used to measure light wavelength, refractive index, thickness, and concentric interference fringes. [0003] When measuring fringes with a Michelson interferometer, it is necessary to count hundreds of fringes across the field of view. 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 fringes cannot be counted if they vibrate slightly). (3) Error prone. In order to improve the accuracy of measurement, a method of multiple measurements is usually adopted, but this method is difficult to improve the accuracy of ...

Claims

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Application Information

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