Apparatus and method for detecting size and refractive index of material in diamond anvil cell

Abstract

The invention provides an apparatus and method for detecting the size and refractive index of a material in a diamond anvil cell. The apparatus and method of the invention are applicable to the research of the refractive index under high pressure and high-pressure equation of state of a material. The apparatus comprises a broadband light source; the apparatus further comprises a cubic prism; a converging objective lens and a triangular prism are sequentially arranged on two emergent light paths of the cubic prism; an area-array detector is arranged behind the cubic prism; a reflector is arranged on the emergent light path of the triangular prism; a diamond anvil cell is arranged on the emergent light path of the converging objective; the diamond anvil cell is connected with a first displacement mechanism; and the reflector is connected with a second displacement mechanism. According to the apparatus and method of the invention, only one set of interference measurement device is used, the real-time thickness and refractive index of a sample can be calculated out with one step, and based on area array imaging characteristics, the volume of the sample can be obtained, and therefore, an extra monochromatic light interference device is not required to be adopted; a measurement process is simple, and the measurement of the parameters of the material under high pressure can be facilitated, and can be realized with easiness. The apparatus and method of the invention have great market application value in fields such as energy and material fields.

Description

technical field [0001] The invention belongs to the technical field of interference imaging measurement, and in particular relates to a device and method for measuring the refractive index and volume of a substance in a diamond pair anvil based on the principle of optical coherence tomography. Background technique [0002] High pressure can dramatically change the properties of matter, which provides important experimental means for research and development in the fields of physics, chemistry, materials, and biology. Detecting the refractive index of the substance under high pressure can analyze the electronic properties of the substance, and detecting the volume of the substance under high pressure can help to obtain the equation of state. The measurement of these parameters is helpful for the research and development of new materials and new devices. However, there is no method and device that can accurately obtain the refractive index and volume of a substance under high ...

AI Technical Summary

Problems solved by technology

However, there is no method and device that can accurately obtain the refractive index and volume of materials under high pressure using a single set of instruments.

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