Study of Full-Field Real-Time Measuring System: An Innovative Application of Pulse Laser and Holographic Interferometry

• Main Authors: Yuan-Fu Huang, 黃元甫
• Other Authors: Kunag-Chong Wu
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/04788362966141696951

碩士 === 國立臺灣大學 === 應用力學研究所 === 90 === A Full-field dynamic measuring system based on optical metrology is developed. A high precision hammer is used to supply elastic wave source. A pulse laser is used to measure any moment of dynamic motion of an impacted disk. Although feasibility of high-speed dynamic system using ESPI has been proved, the speckle noise of ESPI may reduce the resolution of fringe and increase the processing time. In this study holographic interferometry is employed as it provides better visibility of fringe and has some advantages over ESPI. A difficulty of implementing the measuring system lies in the recording of holograms by the pulse laser. In our study, we propose a suitable and reasonable solution to this problem so that the holographic interferometry is workable in full-field measurement of dynamics motion.