Calibration device for stress optical coefficient of transparent material

Abstract

The invention relates to a calibration device for a stress optical coefficient of a transparent material, belongs to the technical field of material detection, and solves the problems that an existing calibration device is complex, limited in use scene and large in calibration error. The device comprises a tension mechanism used for applying different axial tension forces to a transparent material standard component to be detected; a test light path mechanism which is used for receiving the visible light beam and obtaining the background light intensity of a test environment, the light intensity of emergent light with different wavelengths in a corresponding preset wave band range when the visible light beam is incident, and the light intensity of emergent light in a corresponding preset wave band range when the transparent material standard component to be detected is in different axial tensile forces; a processor which is used for obtaining the mapping relation between the internal stress and the optical path difference of the transparent material standard component to be detected according to the parameters through a numerical fitting method, and then calibrating the stress optical coefficient of the transparent material standard component to be detected. The device is simple in structure, not limited by the environment and high in calibration precision.

Description

technical field [0001] The invention relates to the technical field of material detection, in particular to a calibration device for stress optical coefficients of transparent materials. Background technique [0002] Among the factors affecting the quality of materials and the life of structures, the factor of stress plays a crucial role. The internal stress of a material refers to the stress that still exists in the material and maintains self-equilibrium after the external action is eliminated, also known as the residual stress. The internal stress in the material is generally divided into thermal stress, structural stress and mechanical stress according to the source. These stresses will cause the material to warp or twist, crack, and even cause the material to fail. The detection of material stress can reflect the state of the material itself And potential problems, so it has very important research and application significance. The stress optical coefficient of the ma...

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Problems solved by technology

[0005] In view of the above analysis, the embodiment of the present invention aims to provide a calibration device for the optical coefficient of stress of transparent materials to solve the problems in the prior art that the calibration device for the optical coefficient of material stress is complicated, the use scenarios are limited, and the calibration error is large

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