美国材料和加工工程发展学会(SAMPE)第27届专题讨论会上,介绍了一种新的无损检查光学方法——切变图象法。这种无损检查(SNDT)技术十分适合于生产现场的无损检测工作。SNDT——无损检查是一种能够检查物体表面应变的光学干涉法。由于物体的缺陷处通常会引起应变集中,因此根据应变集中就可以识别和发现缺陷。据介绍,这项技术的关键设备是一架“切变图象”照相机,它采用一个特殊的角度棱镜来散射部分图象光线。这切变图象照 At the 27th Symposium of the American Society of Materials and Process Engineering (SAMPE), a new non-destructive optical inspection method, the shear image method, was introduced. This non-destructive inspection (SNDT) technique is well suited for non-destructive testing at the production site. SNDT - Non-destructive inspection is an optical interferometry that can inspect the surface strain of an object. Since the defects in the object usually cause strain concentration, the defect can be identified and found based on the strain concentration. According to reports, the key technology of this technology is a “shear-image” camera, which uses a special angle prism to scatter part of the image light. This cut the image according to