Objective speckle of sticking foil is a new approach to apply the objective speckle method into various materials for in-plane displacement measurememts. Specimen surface has been treated by sticking a thin layer of aluminium foil and scratching a random grating by relatively easy technique in order to form high reflectance and fine optical details. After double exposes by direct recording system without using lenses, the holographic film possesses a broad spatial spectrum range and displacement information. Full-field contour maps are obtained with clear lines of equal displacement, high sensitivity, and large adju-stable measurement range. It is available for practical engineering problems and for both plane and developable curved surfaces.
"The Objective Speckle Of Stickling Foil And Its Applications", Proc. SPIE 0814, Photomechanics and Speckle Metrology, (17 February 1987); doi: 10.1117/12.941686; https://doi.org/10.1117/12.941686