Application of reflecting real-time digital holography in thermal stress field of rock

In order to study the strain of rock under pressure in real time and conveniently,real-time digital holographic method was adopted.With a 15cm × 15cm×1.5cm rock loaded in a 3-D afterburner shelf,the rock stress field distribution and evolution of the interference fringes under different conditions in the process of compression strain were collected and recorded with a CMOS in real-time digital holographic optical path.Then,this video file was restored with MATLAB and the rock at ambient temperature conditions,the pre-drilling strain under the conditions of pressure changes in real time were obtained.The results show that real-time digital holographic method is a high-precision,non-destructive detection method.Real-time digital holographic method can detect the real time tress conveniently and fast not only on the rock but also on other similar materials.