@article{article, title = {{Basic physical principles of defocused speckle photography: a tilt topology inspection technique}}, publisher = {{Elsevier}}, url = {{}}, year = {{1976}}, month = {{10}}, author = {{Gregory DA}}, doi = {{10.1016/0030-3992(76)90004-9}}, volume = {{8}}, journal = {{Optics & Laser Technology}}, issue = {{5}}, pages = {{201-213}}, note = {{Accessed on 2026/03/14}}}