REMOTE AND NONINTRUSIVE LASER DIAGNOSTICS FOR EMERGED AND
Transcript of REMOTE AND NONINTRUSIVE LASER DIAGNOSTICS FOR EMERGED AND
REMOTE AND NON‐INTRUSIVE LASER DIAGNOSTICS FOR EMERGED AND SUBMERGED CULTURAL HERITAGE
M. Guarneri G. Fornetti, M. Ferri De Collibus, L. De Dominicis, M. Francucci, M. Nuvoli
Starting from the end
Author: M. Guarneri - email: [email protected]
What we have seen
Author: M. Guarneri - email: [email protected]
A complete color 3D model of Amore and Psyche Lodge – Villa Farnesina (Roma)
It was acquired by the use of a 3D color laser scanner prototype (RGB-ITR) developed in ArtVisLab – C.R. ENEA Frascati
The aim of the acquisition was to demonstrate the versatility of RGB-ITR data, useful for C.H. professionals and stakeholders (both
remote polychromatic and structure information), cataloguing (not simple photos) and fruition (virtual tour and mobile
information).
Who we are
Author: M. Guarneri - email: [email protected]
UT-APRAD Unità Tecnica APplicazioni delle RADiazioni (~ 80 employers)
DIM DIagnostica e Metrologia (~ 27 employers)
ArtVisLab (ITR systems development laboratory)
SOR SOrgenti di Radiazioni (~ 25 employers)
MNF Micro e Nano Strutture e Fotonica (~ 18 employers)
MAT Modellistica MAtematica (~ 7 employers)
LIF and LIBS laboratory
Our goals
Author: M. Guarneri - email: [email protected]
Digitalize the reality trying to capture all the aspects of it, even the hidden parts that the human eye is not able to perceive.
Fill the holes let by commercial instruments introducing a new family of devices useful in different sectors of C.H. environment.
Remove the generalized idea about 3D scanning seen only as an expansive game, introducing remote/quantitative/no-invasive/light-free analysis.
Create an enlarge community composed by professionals, stakeholders, researchers and industrial sectors for the development of sensors able to satisfy specific needs of C.H. sector.
What You See Is Not What You See
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What You See
Color and distance information are collected by the use of “active” light
Color information is collected by the use of “passive” light
Color + structure information
Author: M. Guarneri - email: [email protected]
Each pixel is composed by four information : • Three laser color layers • Distance instrument-target
The result is a hyper-photo where the white is calibrated at every distance
RGB-ITR components
Author: M. Guarneri - email: [email protected]
Hardware: Optical head
Electronics system
Analysis and post-production tool:
itrAnalyzer
Scanner Control Software:
ScanSystem
Characteristics and functioning principle
RGB-ITR is the acronym for Red Green Blue Imaging Topological Radar
It’s based on double Amplitude Modulation Technique (190MHz/5MHz)
Collects five information per pixel – three colors and two distances
Working range of 3-30 m
Modular configuration – suitable for hostile environments
Works with three independent laser sources – 650 nm, 532 nm, 450 nm
M. Guarneri – [email protected]
M. Guarneri – [email protected]
Characteristics and functioning principle
• Horizontal movement:
• Scanning range: 80°
• Step precision: 0.002°
• Motor speed: 20°/s
• Max pixels per row: 40kpixels
• Max time per row: 4s
Scanning mirror movement:
• Vertical movement:
• Scanning range: 310°
• Step precision: 0.002°
• Motor speed: 20°/s
• Max pixels per row: 155kpixels
• Max time per row: 15.5s
Scanning mirror movement:
… the ITR “eye” sees in the same way
laser wavelength 650 nm
laser wavelength 532 nm
laser wavelength 440 nm
Author: M. Guarneri - email: [email protected]
by the superimposition of three lasers
laser wavelength 650 nm
laser wavelength 532 nm
laser wavelength 440 nm
Author: M. Guarneri - email: [email protected]
with a resulting “white” spot
Resulting white spot
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~ 0,5 mm @ 10 m ~ 1,2 mm @ 19 m
during both the night…
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… and the day…
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The acquisition is the same (no external light sources dependency)
Author: M. Guarneri - email: [email protected]
Day
Night
Day
Night
Night
Night
Day
Day
Color calibration method
3 m 4 m 5 m 6 m 7 m
distances (m)
amp
litu
de
(V)
Calibration curves are obtained by moving a white target at several distances and illuminating it with the three lasers
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No-invasiveness
Author: M. Guarneri - email: [email protected]
Author: M. Guarneri - email: [email protected]
Not only 3D
Not only 3D
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Color profiles
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Distance profiles
M. Guarneri – [email protected]
Remote colorimetry and structure monitoring
Author: M. Guarneri - email: [email protected]
This image is shown only for scientific purposes. Any other reproduction purposes are forbidden.
The God’s light ear-rings can be observed only in photos collected at 50 cm by a Japanese team.
RGB-ITR collected this image at a distance of about 20 m.
A (workable) business model
Author: M. Guarneri - email: [email protected]
Research
glue
C.H. community Educational/Entertainment Industry
Technology developer
Content owner Digital content provider
A (workable) business model
Author: M. Guarneri - email: [email protected]
C.H. community requires high quality diagnosis for restoration,
cataloguing and educational purposes
ENEA + spin-off can offer technologies and services for digitization, diagnosis
and GPD1 production (first post-production step).
•1General Purpose Data are intermediate data which can be offered as 3D model or quantitative data
Data collected by ITR technology can be used by industry for digital movies, educational games, hi-tech catalogues, Augmented Reality apps
Profits
Different use of RGB-ITR data
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Explore data on mobile devices
Virtual tour on 3D Cinemas
Data for health and wellness
Underwater ITR
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The real underwater prototype and its results
Author: M. Guarneri - email: [email protected]
Acqua di mare sintetica, k = 0.3m-1
Range 8.5m
Modulazione 85 MHz
- Information of analytical and qualitative interest on different materials by the analysis of the emission of fluorescence
- Capability to give information on substances having specific spectral signature
L laser O collecting optics M mirrors S spectrometer C lens D CCD array
LIF scanning is a fast, no invasive, remote, technique of investigation
LIF Scanning system
An image of 1.5 × 5 m2 is
scanned in less than 2 minutes
at 25 m distance
The identification of areas
heavily treated during the restoration can be documented
Two colours
images to
better
document the
restoration
process.
Luisa Caneve Francesco Colao Valeria Spizzichino
-Qualitative, semi-quantitative and quantitative information on different materials by the analysis of the optical plasma emission. Capability to work in air and to study underwater samples. Need of the only optical access to the sample surface.
L laser M monochromator D time gateble ICCD E electronics
E
M D
L
275 280 285 290 295 300 305
0
100000
200000
Si
Mg
Cu
Cu
Sn
Sn
Inte
nsity (
a.u
.)
Wavelength (nm)
alloy
icrust
Binary alloy Cu/Sn
Stratigraphic analysis
0.00 0.02 0.04 0.06 0.08 0.10 0.12 0.14 0.16
0.0
0.2
0.4
0.6
0.8
1.0
I Sn/I
Cu
Sn/Cu (% in weigth)
Paintings detection technique Cu=81 8 %
Sn=14.5 1.4 %
Material Analysis
LIBS system
ArtVisLab researchers
M. Guarneri – [email protected]
Author: M. Guarneri - email: [email protected]
We think that our society has the responsibility to keep memory of the
entire historical monuments using the best technologies that the science offers at
the moment
Thanks for your attention