Vis-NIR reflectance spectrum of Beauregard pigment (PIG_0174_A_601), powder with grains < 160 µm, d=0.96 g/cm3
- Title
- Vis-NIR reflectance spectrum of Beauregard pigment (PIG_0174_A_601), powder with grains < 160 µm, d=0.96 g/cm3
- DOI
- 10.26302/SSHADE/EXPERIMENT_BS_20200812_100
- Data reference
- Schmitt, Bernard; Chalmin-Aljanabi, Emilie; Chassin de Kergommeaux, Aurélie (2019): Vis-NIR reflectance spectra of Beauregard pigments (PIG_0174_A): raw blocks, powders, polished plot and painted matter. SSHADE/PIG (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20200812_100
- Publications
- Database
- Experimentalists
- Experiment type
- laboratory measurement
- Type
- reflectance factor
- 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 #1 402.0 - 422.0 4.0 4.85 0.5 #2 426.0 - 666.0 4.0 1.9 0.1 #3 670.0 - 998.0 4.0 3.8 0.2 - Filters
-
Type Center/Edge ($nm$) Width ($nm$) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 362-998nm range. Flat 0.40-0.48nm range measured at 10nm and resampled at 4nm
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 ${\pm}$ 0.1 $mm$
- Comments
- illumination with 8 fiber optic spots within a 5.2 mm diameter, observation within an ellipse 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 1002.0 - 1426.0 4.0 3.8 0.2 #2 1430.0 - 3198.0 4.0 7.6 0.4 #3 3202.0 - 4186.0 8.0 15.5 0.8 - Filters
-
Type Center/Edge ($nm$) Width ($nm$) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 602-4210nm range
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 ${\pm}$ 0.2 $mm$
- Comments
- illumination with 9 fiber optic spots within 7.5 mm diameter, observation within an ellipse of 23x20 mm
- Experiment
- Vis-NIR reflectance spectra of Beauregard pigments (PIG_0174_A): raw blocks, powders, polished plot and painted matter
- Date begin
- 2019-12-12
- Date end
- 2020-02-27
- Release date
- 2021-03-31 17:05:45 UTC+0000
- Version (Date)
- #1 (2021-03-31 17:05:45 UTC+0000, Updated: 2022-11-07 07:43:28 UTC+0000)
- History
-
Date Mode Version Status Comments 2020-08-14 15:39:34 UTC+0000 first import #1 valid version
- Analysis
- raw bidirectional reflectance spectrum calibrated: 1) with "Spectralon 99%" measured under same geometry using its absolute BRDF (0.36-1.35µm) and 2) with "Infragold" using its relative spectral reflectance (1.35-4.2µm). The visible spectrum (0.36-1µm) is scaled by a factor 0.90 (due to slightly different compaction and density of the 2 samples) and merged with the NIR spectrum (1-4.2µm). 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. The almost flat 0.40-0.48µm part is interpolated from a lower sampling/resolution measurement (10nm interpolated at 4nm).
- Quality flag
- 4
- Validator(s)