Transient vibration measurements using multi-pulse digital holography |
| |
Authors: | G Pedrini Ph Fröning H Fessler HJ Tiziani |
| |
Institution: | a Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9 D-70569 Stuttgart Germany |
| |
Abstract: | An optical system for the evaluation of transient deformations will be described. In order to increase the temporal resolution, a ruby laser producing four pulses has been used. Four separate digital holograms (one hologram for each pulse) of the test object are recorded in a few microseconds on three CCD sensors. The Fourier method is used for the quantitative evaluation of the digital holograms. The phases are obtained from the complex amplitudes, and the deformation at different times is calculated from phase subtraction. Experimental results are presented. |
| |
Keywords: | multi-phase holography digital holographic interferometry multi-pulse lasers transient vibrations |
本文献已被 ScienceDirect 等数据库收录! |