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Digital type Rayleigh interferometer

A Rayleigh interferometer and digital technology, applied in the field of interferometers, can solve problems such as inconvenience of use, and achieve the effects of high measurement accuracy and convenient use.

Inactive Publication Date: 2015-03-04
SHANXI UNIV
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Problems solved by technology

According to the rotation scale of the compensator, find out the number of moving interference fringes of sodium light from the calibration curve table or calibration curve graph, and then calculate it, which is very inconvenient to use

Method used

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  • Digital type Rayleigh interferometer
  • Digital type Rayleigh interferometer
  • Digital type Rayleigh interferometer

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Embodiment Construction

[0017] Traditional Rayleigh interferometers, such as figure 1 As shown, it is composed of white light source 1, single slit 2, first lens 3, double slit 4, first sample container 5, second sample container 6, first compensator 7, second compensator and 8, the first Two lenses 9 and a small cylindrical lens 10 are formed.

[0018] An embodiment of the present invention, such as figure 2 , Figure 5 Shown: white light source 1, single slit 2, first lens 3, double slit 4, first sample container 5, second sample container 6, first compensator 7, second compensator and 8, second lens 9, small cylindrical lens 10, small semiconductor laser 11, grating 12, filter 13, beam expander 16, photosensitive diode 24 and single-chip microcomputer and display 25; Described first lens 3 and second lens 9 are cylindrical lenses; The light emitted by the small semiconductor laser 11 is divided into two beams of light by the grating 12 and the filter 13, and becomes two beams of parallel light...

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Abstract

The invention provides a digital type Rayleigh interferometer. A laser interferometer light path is additionally arranged in a light path of a traditional Rayleigh interferometer; the laser interferometer light path and a white light interference light path of the traditional Rayleigh interferometer are connected in parallel to form a whole body through a compensator. The interferometer is high in measurement precision and is convenient to use (a sodium lamp or laser does not need to be replaced for calibration); the interferometer can accurately measure refractive indexes of gas, liquid and optical materials. The instrument can be used for the fields of detecting the production and machining quality of an optical element, detecting the uniformity of the optical materials, researching a fine structure of a spectrum, detecting the concentration of gas of a coal mine, carrying out scientific researches and experiment teaching, and the like.

Description

technical field [0001] The invention relates to an interferometer, in particular to a digital Rayleigh interferometer for accurately measuring the refractive index of gas, liquid and optical materials. Background technique [0002] A Rayleigh interferometer is an instrument that precisely measures the refractive index of gases, liquids, and optical materials. See pages 1-9 of <<Physical Optics Experiment>> edited by Yang Zhichang and Ma Xiufang (published by Fudan University Press). When white light is used for double-slit interference, the zeroth order of the interference fringes is a white fringe, and both sides of the zeroth order white fringe are colored fringes. When two sample containers of the same material and the same size are placed in the two optical paths respectively, the positions of the interference fringes formed by the two beams passing through the two sample containers are different from the positions of the interference fringes formed by direc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/45
Inventor 武少文
Owner SHANXI UNIV
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