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ARGon3: "3D appearance robot-based gonioreflectometer" at PTB
A Höpe1, T Atamas, D Hünerhoff
1Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany. andreas.hoepe@ptb.de
The Review of Scientific Instruments
|May 8, 2012
Summary
A new 3D appearance robot-based gonioreflectometer (ARGon3) enables high-resolution visual appearance measurements. This advanced facility precisely captures luminance, color, and reflectance, offering new insights into material properties.
Area of Science:
- Metrology
- Optical Engineering
- Materials Science
Background:
- Standard gonioreflectometers have limitations in spatial resolution and spectral range.
- Accurate measurement of visual appearance is crucial for material characterization and quality control.
Purpose of the Study:
- To introduce a novel facility, the 3D appearance robot-based gonioreflectometer (ARGon3), for advanced visual appearance measurements.
- To showcase the capabilities of ARGon3 in high-resolution luminance, color, and reflectance measurements.
Main Methods:
- Utilized a photometric luminance camera with 28 μm spatial resolution for luminance and color coordinate measurements.
- Employed a line-scan CCD camera with a spectrometer for radiance factor and bidirectional reflectance distribution function (BRDF) measurements across the full V(λ) range.
- Integrated arbitrary angles of irradiation and detection relative to the surface normal.
Main Results:
- Achieved spatially high-resolved measurements of luminance and color coordinates.
- Obtained radiance factor and BRDF data in the full V(λ) range (360 nm-830 nm) within approximately 2 minutes.
- Presented initial goniometric measurements of diffuse reflection and colorimetric data for special effect pigments.
Conclusions:
- The ARGon3 facility significantly advances the capability for detailed visual appearance analysis.
- The system provides comprehensive data for characterizing complex optical properties, such as those of interference-based effect pigments.
