The PATRONUS project is in its final development phase. A novel industrial process has been created to manufacture sheets that generate "speckle" patterns easily and economically. The manufacturing method is based on spraying a solution containing microparticles onto polycarbonate sheets which, when illuminated by a laser, project the desired patterns. It has been found that the patterns are modified if the object where they are projected is moved away, so that the inter-distances between significant points are magnified linearly with the projection distance. This technology allows the development of precise distance measurements through the easy and rapid production of sheets with microparticles.

Project RTC2019-007422-4 funded by MCIN/AEI/10.13039/501100011033