Portable photoelastic instrument capable of taking picture

• Main Authors: WANG XIAOJUN, YUAN HAIPING, ZHI XUEYI, ZHAO KUI
• Format: Patent
• Language: Chinese; English
• Published: 26.05.2010
• Subjects: MEASURING; MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER,MECHANICAL EFFICIENCY, OR FLUID PRESSURE; PHYSICS; TESTING

The utility model relates to a portable photoelastic instrument capable of taking pictures. At present, an observer is obliged to perform the drawing for the analysis on the spot when observing stripe-pattern photoelastic instrument of a stressometer. Due to the influence of various factors in a well, images observed on the spot are asymmetric or deformed, are difficult to identify sometimes and even are judged improperly. The photoelastic instrument comprises an objective lens 1. Behind the objective lens 1, a quarter of wave plate 2, a polaroid sheet 3, a spectroscope 4, a quarter of wave plate 5, a polaroid sheet 6 and a photographic plate 7 are sequentially arranged on an objective-lens optic axis 13, wherein the quarter of wave plate 2, the quarter of wave plate 5, the polaroid sheet and the photographic plate are perpendicular to the objective-lens optic axis respectively, and the spectroscope and the objective-lens optic axis lean forwards and form an included angle of 45 degrees; a quarter of wave pla