The theoretical and numerical analysis in this work show that both surface tilting and translational motion can be simultaneously calculated using the speckle photographic technique by recording consecutive speckle pattern images in two different Fresnel diffraction distances. A simulation example based on the proposed scheme is given to verify the method's validity and high accuracy of the calculated motion detection. Compared with other previous works the results show that this method is efficient and easy to implement. © 2008 Elsevier B.V. All rights reserved.
Hwang, H. E., & Han, P. (2009). Theoretical analysis for surface tilt and translation detection based on speckle photography in the Fresnel domain. Optics Communications, 282(3), 351–354. https://doi.org/10.1016/j.optcom.2008.10.015