Vis-NIR reflectance spectrum of Beauregard pigment (PIG_0174_A_601), powder with grains < 160 µm, d=1.22 g/cm3
- Title
- Vis-NIR reflectance spectrum of Beauregard pigment (PIG_0174_A_601), powder with grains < 160 µm, d=1.22 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 #1 392.0 - 673.0 10.0 4.8 0.25 #2 683.0 - 913.0 10.0 9.7 0.5 - Filters
-
Type Center/Edge ($nm$) Width ($nm$) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 360-1000nm 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
- 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 #1 920.0 - 1420.0 10.0 9.5 0.5 #2 1430.0 - 3190.0 10.0 19.0 1.0 #3 3200.0 - 4180.0 20.0 38.5 1.0 #4 4380.0 - 4700.0 20.0 38.5 2.0 - Filters
-
Type Center/Edge ($nm$) Width ($nm$) Place #1 several high frequency filters output of monochromator - Scan number
- 10
- Comments
- measured over the 500-4700nm 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
- 2019-09-30
- Date end
- 2019-10-04
- 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 (0.36-2.1µm) and 2) with "Infragold" using its relative spectral reflectance (2.1-4.7µm). The visible spectrum (0.36-0.91µm) is scaled by a factor 1.03 (due to slightly different compaction and density of the 2 samples) and merged with the NIR spectrum (0.91-4.7µm). 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. The noisy atmospheric CO2 range (4.2-4.36µm) has been removed. A very slight smoothing (binomial over 3 points) has been applied, except in the visible (<0.95µm) and in the NIR absorption band.
- Quality flag
- 3
- Validator(s)