Abstract
Apparatus for acquiring digital data corresponding to a 3D object, incorporates a frame located in proximity to the 3D object in no fixed positional relationship therewith, a shutter for scanning the object with a shadow line, and apparatus for deriving signals corresponding to the position of the shadow line following on the 3D object.
| Original language | English (US) |
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| U.S. patent number | 4757379 |
| Filing date | 5/18/87 |
| State | Published - Jul 12 1988 |