On the ‘Speckle’ Movements
Salvatore Ganci *
Studio di Conservazione e Catalogazione Strumenti Scientifici, Via privata “G. Deledda”, 19 - A2 27020 Tromello (Pavia), Italy.
*Author to whom correspondence should be addressed.
Abstract
Since the second half of 1900 century, after the diffusion of the first He-Ne Lasers, several ‘reading key’ on relative movements while seeing a speckle pattern depending on the eye ametropias have been proposed. This paper quotes the development of these different approaches to this phenomenology, as a historical survey, and shows that a complete explanation must involve the vision psychophysics and the retinal structure.
Keywords: Speckle patterns, historical survey, physical optics, vision