
1) Dimensional instrument 2) Optical device
Found on
https://www.crosswordclues.com/clue/holovid

HoloVID is a tool originally developed for the holographic dimensional measurement of the internal isogrid webbing of the Delta Series of (launch vehicle) Space Craft skins by Mark Slater in 1981. The use of multiple planes and multiple points of light to measure shapes and construct volumetric estimates of objects has also been widely reported. T...
Found on
http://en.wikipedia.org/wiki/HoloVID
No exact match found.