Three-Dimensional Scanner for Archeological Artifacts patent pending Daniel Hahn, Kevin Baldwin, Donald Duncan Inventors

Technology – Purpose Obtain 3D data on the scale of 1-50 µm using a non-contact method Laser scanners bottom out at ~50 µm White-light interferometers, amongst other techniques, are sub-micron Profilometers are contact instruments and can get “stuck” on sharp features

Technology – Prototype Design Stationary Components Camera Projector Telecentric Lens Telecentric Adaptor Lens ND Filter V-block Mount Elevation Stage (stationary) Rotated Components Rotary Stage Optical Bench

Technology – use photometric stereo to measure fine resolution shape (local) Rough sphere Cuneiform tablet

Technology – use structured light to measure course resolution shape (global) 3/4 inch Cuneiform tablet

Technology – algorithm developed to combine data sets into 3D model 25 µm xy resolution 2 µm z resolution 3/4 inch Cuneiform tablet

Technology Applications Can be used to scan any diffusely reflecting object Scalable to achieve wide range of object sizes and resolutions Produces very accurate 3D data set (2 µm z-resolution, 25 µm x,y-resolution)

Commercial Applications 3D data on any diffusely reflecting object: Historical artifacts Fossils Gemstones (temporarily painted) Rocks Mechanical parts

Commercial Opportunities Measurement and recreation of mechanical parts Forensics Archiving / preserving historical artifacts Scientific research

Contact Information For technical information contact: Daniel Hahn, Inventor 443-778-7404 daniel hahn@jhuapl.edu For licensing information contact: Heather Curran, Technology Manager Office of Technology Transfer The Johns Hopkins University Applied Physics Laboratory 11100 Johns Hopkins Road Laurel, MD 20723 443-778-7262 heather.curran@jhuapl.edu www.jhuapl.edu/ott