Spectrum

Vis-NIR reflectance spectrum of Pierrerue pigment (PIG_0176_A_601), powder with grains < 160 µm, d=1.33 g/cm3

Title
Vis-NIR reflectance spectrum of Pierrerue pigment (PIG_0176_A_601), powder with grains < 160 µm, d=1.33 g/cm3
DOI
10.26302/SSHADE/EXPERIMENT_BS_20200814_100
Data reference
Schmitt, Bernard; Chalmin-Aljanabi, Emilie; Chassin de Kergommeaux, Aurélie (2019): Vis-NIR reflectance spectra of Pierrerue pigments (PIG_0176_A): raw blocks, powders, plots and painted matter. SSHADE/PIG (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_BS_20200814_100
Publications
Comments
unpublished
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
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 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 - 2900.0 10.0 19.0 1.0
Filters
Type Center/Edge (nm) Width (nm) Place
#1 several high frequency filters output of monochromator
Scan number
10
Comments
measured over the 530-2900nm range
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 ellipse of 23x20 mm
Experiment
Vis-NIR reflectance spectra of Pierrerue pigments (PIG_0176_A): raw blocks, powders, plots and painted matter
Date begin
2019-10-01
Date end
2019-10-04
Release date
2025-02-01 10:01:55+0000 UTC
Version (Date)
#1 (2025-02-01 10:01:55+0000 UTC, Updated: 2025-02-01 10:01:55+0000 UTC)
History
Date Mode Version Status Comments
2020-08-17 20:54:19+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 (0.36-2.1µm) and 2) with "Infragold" using its relative spectral reflectance (2.1-2.9µm). The visible spectrum (0.36-0.91µm) is scaled by a factor 1.085 (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. A very slight smoothing (binomial over 3 points) has been applied, except in the visible (<0.95µm) and in the NIR absorption bands.
Quality flag
3
Validator(s)