White interferograms are signals recorded using the interference of light with positional information obtained using a white interferometer. which is a laser technology that uses light interference for the non-contact measurement of the surface topography of a sample. In long-range measurements. the reflected light weakens with increasing distance. https://www.nacrack.com/mega-pick-As-for-Me-and-My-House-Wall-Decal-in-Hebrew-Yahauh-flash-find/