Continual in-plane displacement measurement with temporal wavelet transform speckle pattern interferometry.
A heterodyne temporal speckle pattern interferometer that measures the in-plane displacement dynamically has been built. The object is displaced in its plane continuously and the frequency-modulated output signals with a carrier frequency are recorded by a CCD camera. The displacement information is extracted with wavelet transform technique. Preliminary experiments have been performed with such interferometer. The respective measurement results recovered from wavelet transform and Fourier transform are compared.
Key Laboratory of Luminescence and Optical Information of Ministry of Education, Beijing Jiaotong University, Beijing, China.
Zhan
Z
Gao
Yan
Y
Deng
Yiting
Y
Duan
Zhifeng
Z
Zhang
Cheng
C
Wei
Shiqian
S
Chen
Jianying
J
Cui
Qibo
Q
Feng