Vis-NIR reflectance spectrum of Fontenaille pigment (PIG-0218-2019), sawn block
- Title
- Vis-NIR reflectance spectrum of Fontenaille pigment (PIG-0218-2019), sawn block
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20191012_100
- Data reference
- Schmitt, Bernard; Chalmin-Aljanabi, Emilie (2019): Vis-NIR reflectance spectra of Fontenaille pigments (PIG-0175-2016 + PIG-0218-2019): raw block, powders with different grain sizes and painted matter. SSHADE/PIG (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20191012_100
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- Comments
- No photometry accuracy below 0.41 µm. Spectrum very noisy above 3.2 µm.
- Instrument
- SHADOWS Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- cylindrical aluminium sample holders of various sizes for powder
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- Vis
- Valid spectral range(s)
-
Min - Max (nm) Sampling (nm) Resolution (nm) Position accuracy (nm) Absorption edge #1 410.0 - 678.0 4.0 1.9 0.2 #2 682.0 - 802.0 4.0 3.8 0.4 - Filters
-
Type Center/Edge (nm) Width (nm) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 362-802nm range, resolution slightly vary over the first grating: 1.94-1.90 nm
Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).
- Observation geometry
- bidirectional
- Observation mode
- fixed angles
- Incidence angle
- 0.0°
- Emergence angle
- 30.0°
- Azimuth angle
- 0.0°
- Phase angle
- 30.0°
- Resolution illumination
- 5.8°
- Resolution observation
- 4.1°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Resolutions
- 5.2 ± 0.1 mm
- Comments
- illumination with 8 fiber optic spots within a 5.2 mm diameter, observation within an ellips of 23x20 mm
- Instrument
- SHINE Spectro-Gonio bidirectional reflection Vis-NIR
- Sample holder
- cylindrical aluminium sample holders of various sizes for powder
- Standard medium
- vacuum
- Observation mode
- spectrum
- Spectral range type(s)
- NIR
- Valid spectral range(s)
-
Min - Max (nm) Sampling (nm) Resolution (nm) Position accuracy (nm) Absorption edge #1 806.0 - 1426.0 4.0 3.8 0.4 #2 1430.0 - 3198.0 4.0 7.6 0.8 #3 3202.0 - 3234.0 8.0 15.5 1.6 - Filters
-
Type Center/Edge (nm) Width (nm) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 402-4202nm range, resolutions slightly vary over the gratings: 3.88-3.77, 7.77-7.41, 15.52-15.42 nm. very noisy > 3234nm
Definition: incidence and emergence angles are positive with origin at nadir, and vary in same direction. Azimuth origin (increasing clockwise) is for i = e (opposition geometry).
- Observation geometry
- bidirectional
- Observation mode
- fixed angles
- Incidence angle
- 0.0°
- Emergence angle
- 30.0°
- Azimuth angle
- 0.0°
- Phase angle
- 30.0°
- Resolution illumination
- 5.8°
- Resolution observation
- 4.1°
Illumination
Observation
- Comments
- some wavelength dependent polarization
- Observation mode
- single spot
- Resolutions
- 7.5 ± 0.2 mm
- Comments
- illumination with 9 fiber optic spots within 7.5 mm diameter, observation within an ellips of 23x20 mm
- Experiment
- Vis-NIR reflectance spectra of Fontenaille pigments (PIG-0175-2016 + PIG-0218-2019): raw block, powders with different grain sizes and painted matter
- Date begin
- 2020-02-26
- Release date
- 2020-06-25 12:04:48+0000 UTC
- Version (Date)
- #1 (2020-06-25 12:04:48+0000 UTC, Updated: 2022-11-07 07:49:38+0000 UTC)
- History
-
Date Mode Version Status Comments 2020-06-25 11:20:31+0000 UTC first import #1 valid version
- Analysis
- raw bidirectional reflectance spectrum calibrated: 1) with "Spectralon 99%" measured under same geometry using its absolute BRDF (0.36-1.3µm) and 2) with "Infragold" using its relative spectral reflectance (1.3-4.2µm). The visible spectrum (0.36-0.8µm) is merged with the NIR spectrum (0.8-4.2µm). The residual water vapor lines, around 1.12, 1.38, 1.87, 2.665µm, have been corrected by multiplying by a scaled water vapor transmission spectrum measured at same resolution and sampling. A very slight smoothing (binomial over 3 points) has been applied, except in the narrow NIR absorption bands. A much stronger smoothing has been applied in the noisy part above 3.2µm (data acquisition problem with grating #4). The noisy flat 0.40-0.415µm part is strongly smoothed and extrapolated.
- Quality flag
- 4
- Validator(s)
