中国激光, 2010, 37 (6): 1602, 网络出版: 2010-07-07
切趾数字全息术在相位测量中的应用
Application of Apodization Digital Holography in Phase Measurement
摘要
数字全息术中,全息像的再现过程由于受激光散斑、系统噪声以及全息图边沿衍射等效应的影响,再现像质量降低,因而制约了其在相位测量中的应用。将切趾方法应用到数字全息相位测量中,用Hanning窗对全息图进行切趾处理,以抑制再现像中的边沿衍射效应及噪声的影响。模拟实验和实物实验结果表明,切趾方法能够很好地抑制边沿衍射效应以及噪声对再现物光波相位的影响,提高了相位测量的精度。
Abstract
In digitally holographic reconstruction, the reconstructed image quality is reduced by the effect of the laser speckle, the system noise and the border diffraction of the digital hologram, which restrains the application of digital holography in phase measurement. In this paper, we apply the apodization for the phase measurement in digital holography to suppress the diffraction and noise effects. Simulations and experiments show that apodization can effectively reduce the border diffraction and noise effects to the reconstructed phase information of the objected wave and improve the measurement precision.
张延曹, 赵建林, 范琦, 杨盛. 切趾数字全息术在相位测量中的应用[J]. 中国激光, 2010, 37(6): 1602. Zhang Yancao, Zhao Jianlin, Fan Qi, Yang Sheng. Application of Apodization Digital Holography in Phase Measurement[J]. Chinese Journal of Lasers, 2010, 37(6): 1602.