Transcript Presentation - The Johns Hopkins University Applied Physics

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:
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–
–
–
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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 [email protected]
•
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
[email protected]
www.jhuapl.edu/ott