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

Optical BenchRotary Stage

ElevationStage(stationary)

V-block Mount

ND Filter

Telecentric Lens

Camera

Projector

TelecentricAdaptor Lens

RotatedComponents

StationaryComponents

Technology – use photometric stereo to measure fine resolution shape (local)

Cuneiform tablet

Rough sphere

Technology – use structured light to measure course resolution shape (global)

Cuneiform tablet

3/4 inch

Technology – algorithm developed to combine data sets into 3D model

Cuneiform tablet

3/4 inch

25 µm xy resolution2 µm z resolution

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, Inventor443-778-7404daniel hahn@jhuapl.edu

• For licensing information contact:

Heather Curran, Technology ManagerOffice of Technology TransferThe Johns Hopkins UniversityApplied Physics Laboratory11100 Johns Hopkins RoadLaurel, MD 20723443-778-7262heather.curran@jhuapl.eduwww.jhuapl.edu/ott