Asundi A, Sajan M R
Appl Opt. 1995 Dec 1;34(34):8064-5. doi: 10.1364/AO.34.008064.
Dynamic photoelasticity relies on high-speed photographic systems to record the fringes in motion. Several systems are being used, but the delayed microflash is widely popular in non-destructive studies due to the high-contrast recording and low cost. Flash lamps and lasers are routinely employed as the light source in these setups. The use of LED as a microflash in such systems is presented. Capability of the system is demonstrated by recording fringe patterns from a photoelastic model under dynamic loading. A high-speed Polaroid film is used for recording the dynamic fringe patterns. Low cost, low power, and simplicity in the experimental setup make it possible to adapt the system to undergraduate laboratories.
动态光弹性依靠高速摄影系统来记录运动中的条纹。目前正在使用多种系统，但由于高对比度记录和低成本，延迟微闪光在无损研究中广泛流行。闪光灯和激光通常被用作这些装置中的光源。本文介绍了在这种系统中使用发光二极管作为微闪光的情况。通过记录动态加载下光弹性模型的条纹图案来证明该系统的能力。使用高速宝丽来胶片记录动态条纹图案。低成本、低功耗以及实验装置的简单性使得该系统能够应用于本科实验室。
