Publications

Doug had a variety of publications including the following:

• 'Basic physical principles of defocused speckle photography: a tilt topology inspection technique' published in Optics and Laser Technology, 1976, 8(5), pp. 201–213:  https://www.sciencedirect.com/science/article/abs/pii/0030399276900049#!

This is his most cited work

• 'Speckle scatter, affine geometry, and tilt topology' published in Optics Communications, 1977, 20(1), pp. 1–5
• 'Analysis of Topological Information from Defocused Speckle Photographs', published in Optics and Laser Technology, 1977, 9(1), pp. 17–30
• 'Laser speckle photography and the submicron measurement of surface deformations on engineering structures' published in NDT International, 1979, 12(2), pp. 61–70
• 'A simplified theory of the scattering geometries, topologies and vector fields of speckle photography and holographic interferometry' published in Optica Acta, 1980, 27(4), pp. 481–510: https://www.semanticscholar.org/paper/A-Simplified-Theory-of-the-Scattering-Geometries%2C-Gregory/748bd154e25471a412f118cec2f48e0feaca5da5