Transparent object stress detection device based on micro polarizing film array

The invention discloses a transparent object stress detection device based on a micro polarizing film array. The device comprises a light source, a light uniformizing plate, a polarizer, a 1 / 4 wave plate, the micro polarizing film array and a light intensity detector. A support is connected with one side of a fixing frame and used for horizontally supporting the light source, the light uniformizing plate, the polarizer and the 1 / 4 wave plate; the light uniformizing plate is arranged under the light source and used for uniformizing light emitted by the light source; the polarizer is arranged under the light uniformizing plate and used for converting the light emitted by the light uniformizing plate into linearly polarized light; the 1 / 4 wave plate is arranged above a sample to be detected,and the linearly polarized light emitted from the polarizer is converted into circularly polarized light after passing through the 1 / 4 wave plate, wherein the circularly polarized light is decomposedinto two beams of polarized light mutually perpendicular in polarization direction after passing through the sample to be detected, and the two beams of polarized light finally reach a photosensitivesurface of the light intensity detector after passing through the micro polarizing film array. The light intensity detector collects image information, and the stress value of the whole area of the sample to be detected can be obtained through calculation of the image processing element. The device is simple and convenient to operate, rapid in measurement, compact in structure and wide in application range.