Spectrum

Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_901, grains < 160 µm) painted on limestone block

Title
Vis-NIR reflectance spectrum of Roussillon pigment (PIG_0173_A_901, grains < 160 µm) painted on limestone block
DOI
10.26302/SSHADE/EXPERIMENT_BS_20191012_400
Data reference
Schmitt, Bernard; Chalmin-Aljanabi, Emilie; Chassin de Kergommeaux, Aurélie (2019): Vis-NIR reflectance spectra of Roussillon pigments (PIG_0173_A): raw blocks, 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_400
Publications
Experiment type
laboratory measurement
Type
reflectance factor
Instrument
SHINE Spectro-Gonio bidirectional reflection Vis-NIR
Sample holder
cylindrical raw aluminium sample holders of different sizes and depths
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
Vis, NIR
Valid spectral range(s)
Min - Max ($nm$) Sampling ($nm$) Resolution ($nm$) Position accuracy ($nm$) Absorption edge
#1 442.0 - 598.0 4.0 0.96 0.1
#2 602.0 - 1426.0 4.0 3.8 0.4
#3 1430.0 - 2502.0 4.0 7.6 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 402-2502nm 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 ${\pm}$ 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 Roussillon pigments (PIG_0173_A): raw blocks, powders with different grain sizes and painted matter
Date begin
2020-02-10
Release date
2020-08-28 04:42:57 UTC+0000
Version (Date)
#1 (2020-08-28 04:42:57 UTC+0000, Updated: 2022-11-07 08:01:01 UTC+0000)
History
Date Mode Version Status Comments
2020-08-08 21:07:07 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 (0.4-1.3µm) and 2) with "Infragold" using its relative spectral reflectance (1.3-2.5µm). The residual water vapor lines, around 1.12, 1.38, 1.87 µm, 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 absorption bands. The noisy flat 0.44-0.46µm part is strongly smoothed and extrapolated.
Quality flag
4
Validator(s)