Measurement device and measurement method for transparent medium refractive index

A technology of transparent media and measuring devices, applied in the direction of phase influence characteristic measurement, etc., can solve the problems of limited measurement range, huge equipment, high cost, etc., and achieve the effects of reduced detection requirements, convenient operation, and high precision
CN102998284BActive Publication Date: 2015-01-21TSINGHUA UNIV
2 Cites 2 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2015-01-21

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a device for measuring the transparent medium refractive index by utilizing a laser feedback principle. The device for measuring the transparent medium refractive index by utilizing the laser feedback principle is characterized in that laser feedback fringes generated by the displacement of a to-be-measured sample are taken as a research object; the to-be-measured sample has the wedge angle with same as that of a standard sample; when an incident plane is vertical to the laser axis displacement, because the respective thicknesses of the to-be-measured sample and the standard sample in an optical path changes, namely an optical path in a laser outer cavity changes, feedback fringes are generated in a laser output optical intensity curve. Through the relationship between the feedback fringes and the displacement amount, the refractive index of the to-be-measured sample can be obtained through calculation. The refractive index measurement range of the device provided by the invention is not restricted by a critical angle of the full-reflection principle, and moreover the to-be-measured sample can be transparent solid, liquid and gas, so the application range is wide. The invention further provides a method for measuring the transparent medium refractive index.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a measuring device and a measuring method for the refractive index of a transparent medium. Background technique

[0002] Refractive index is one of the important physical parameters of materials and an important factor affecting the performance of optical systems. The application fields of refractive index measurement include the design and processing of optical components, component detection and product identification in food, pharmaceutical, chemical and other industries, thin film detection, crystal material development, environmental monitoring and jewelry identification, etc. There is also an urgent need for accurate measurement of the refractive index for some demanding instrument systems.

[0003] The current refractive index measurement methods mainly include goniometric method, interferometry method, Fresnel formula method and so on. Among them, the goniometric method is to calculate the refractive index through an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More