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Method and device for measuring internal stress of non-crystal transparent material

A technology of transparent materials and measurement methods, applied in the field of material mechanics, can solve the problems of deviation in color system scale and poor measurement accuracy, and achieve the effect of avoiding scale deviation and improving measurement accuracy.

Active Publication Date: 2018-11-16
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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Problems solved by technology

However, the above measurement results depend on the color comparison results of the human eye, and at the same time, there will be deviations in the color system scale of the display device, which will lead to poor measurement accuracy

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  • Method and device for measuring internal stress of non-crystal transparent material
  • Method and device for measuring internal stress of non-crystal transparent material
  • Method and device for measuring internal stress of non-crystal transparent material

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Embodiment Construction

[0037] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

[0038] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0039] Please refer to the attached figure 1 , the application provides a method for measuring the internal stress of an amorphous transparent material, including:

[0040] S20: Apply polarized light to the measurement area on the test piece, obtain the optical path difference between the birefri...

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Abstract

The invention discloses a method and device for measuring the internal stress of a non-crystal transparent material, and the method comprises the steps: S20, applying polarized light to a measurementregion on a to-be-measured part, obtaining the optical path difference between two birefringence polarized light beams generated by the polarized light on the a to-be-measured part, and obtaining an internal stress value of the measurement region according to the corresponding relation between the optical path difference and the internal stress value. According to the invention, the method and device provided by the invention combine a polarization interference method and a spectrum analysis method for obtaining the function relation between the optical path difference of the polarized light and the internal stress value, reversely obtain the internal stress value of the non-crystal transparent material through the function relation, and achieve the quantitative measurement of the internalstress of the non-crystal transparent material. Meanwhile, the spectrum analysis method is employed for measurement, thereby avoiding the calibration deviation caused by the manual operation and a display equipment color system in the color comparison through a color interference method in the prior art, and improving the measurement precision.

Description

technical field [0001] The present disclosure generally relates to the technical field of material mechanics, and in particular relates to a measurement method and a measurement device for the internal stress of an amorphous transparent material. Background technique [0002] Internal stress refers to the stress that remains inside the object after the external load is removed. Among them, the amorphous transparent material is optically isotropic in a natural state without internal stress, and the propagation direction of light in it is uniquely determined by the law of refraction, and no change occurs when polarized light passes through it; when there is When stressed, its optical properties change from isotropic to anisotropic, and birefringence occurs when light passes through it. Based on this property, stress values ​​in amorphous transparent materials can be examined by means of stress birefringence measurements. [0003] At present, the existing devices for measurin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01L1/24
CPCG01L1/24G01L5/00
Inventor 衡月昆李楠蔡志岩刘术林
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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