Phase determination in holographic Moiré in presence of nonsinusoidal waveforms and random noise
详细信息 查看全文
- 作者：Abhijit Patil and Pramod Rastogi
- 关键词：Interferometry ; Phase measurement ; Holography ; Moiré ; Subspace based methods
- 刊名：Optics Communications
- 出版年：2006
- 出版时间：1 January 2006
- 年：2006
- 卷：257
- 期：1
- 页码：120-132
- 全文大小：1827 K
文摘
This paper proposes a subspace parameter estimation method which besides allowing for accommodating multiple PZTs in an optical interferometer permits for extracting in real time values of phase shifts between data frames at each pixel point. The technique enables to freely choose values of phase shifts between 0 and π. A generalized phase measurement algorithm allows for computing multiple phase information present in the interferometer. The method facilitates the use of spherical beams, addresses errors arising from the miscalibration of the phase shifting devices, and is capable of handling nonsinusoidal waveforms in an effective manner. Numerical simulations demonstrate that phase distributions can be measured with high accuracy even in the presence of noise.