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

2. 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

3. 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

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

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

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

7. 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)

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

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

10. Contact Information
For technical information contact:
Daniel Hahn, Inventor
daniel
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