Spectrum

Optical constants of cellulose pyrolyzed at 400°C from UV to FIR

Title
Optical constants of cellulose pyrolyzed at 400°C from UV to FIR
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Data
Unit:  Range: Valid spectral range(s): 20.0 - 50000.0 micron
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DOI
10.26302/SSHADE/EXPERIMENT_HM_20170912_101
Data reference
Jäger, Cornelia; Mutschke, Harald; Henning, Thomas (1997): Optical constants from UV to FIR for cellulose pyrolized between 400 and 1000°C. SSHADE/DOCCD (OSUG Data Center). Dataset/Spectral Data. https://doi.org/10.26302/SSHADE/EXPERIMENT_HM_20170912_101
Publications
Database
Experimentalists
Spectrum type
Experiment type
laboratory measurement
Type
optical constants
Comments
The spectrum was resampled between 0.2 and 518 µm on a logarithmic wavelength scale
Instrument #1
Instrument
Lambda 19 – reflection UV
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
UV
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 0.2 - 0.319 0.001
Scan number
1
Observation geometry
specular
Observation mode
fixed angles
Incidence angle
12.0°
Emergence angle
12.0°
Azimuth angle
180.0°
Phase angle
24.0°
Resolution illumination
6.0°
Resolution observation
6.0°
Illumination
Type of polarization
no
Observation
Type of polarization
no
Observation mode
single spot
Resolutions
5.0 $None$
Instrument
Lambda 19 – reflection vis
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
Vis
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 0.319 - 0.86 0.001
Scan number
1
Observation geometry
specular
Observation mode
fixed angles
Incidence angle
12.0°
Emergence angle
12.0°
Azimuth angle
180.0°
Phase angle
24.0°
Resolution illumination
6.0°
Resolution observation
6.0°
Illumination
Type of polarization
no
Observation
Type of polarization
no
Observation mode
single spot
Resolutions
5.0 $None$
Instrument
Lambda 19 – reflection NIR
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
NIR
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 0.86 - 3.2
Scan number
1
Observation geometry
specular
Observation mode
fixed angles
Incidence angle
12.0°
Emergence angle
12.0°
Azimuth angle
180.0°
Phase angle
24.0°
Resolution illumination
6.0°
Resolution observation
6.0°
Illumination
Type of polarization
no
Observation
Type of polarization
no
Observation mode
single spot
Resolutions
5.0 $None$
Instrument
BRUKER 113v – reflection Mid-IR
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
MIR
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 2.0 - 25.0
Scan number
64
Observation geometry
specular
Observation mode
fixed angles
Incidence angle
12.0°
Emergence angle
12.0°
Azimuth angle
180.0°
Phase angle
24.0°
Resolution illumination
6.0°
Resolution observation
6.0°
Illumination
Type of polarization
no
Observation
Type of polarization
no
Observation mode
single spot
Resolutions
5.0 $None$
Instrument
BRUKER 113v – reflection Far-IR
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
FIR
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 15.0 - 500.0
Scan number
64
Observation geometry
specular
Observation mode
fixed angles
Incidence angle
12.0°
Emergence angle
12.0°
Azimuth angle
180.0°
Phase angle
24.0°
Resolution illumination
6.0°
Resolution observation
6.0°
Illumination
Type of polarization
no
Observation
Type of polarization
no
Observation mode
single spot
Resolutions
5.0 $mm$
Instrument
BRUKER 113v – transmission Far-IR
Standard medium
vacuum
Observation mode
spectrum
Spectral range type(s)
FIR
Valid spectral range(s)
Min - Max (${\mu}m$) Sampling (${\mu}m$) Resolution (${\mu}m$) Position accuracy (${\mu}m$) Absorption edge
#1 15.0 - 500.0
Scan number
64
Observation geometry
direct
Observation mode
fixed angles
Resolution illumination
6.0°
Resolution observation
6.0°
Illumination
Type of polarization
no
Observation
Type of polarization
no
Observation mode
single spot
Resolutions
5.0 $None$
Name
Generic sample for cellulose pellet pyrolyzed at 400°C for combined R and T spectroscopy
Experiment
Optical constants from UV to FIR for cellulose pyrolized between 400 and 1000°C
Date begin
1997-01-01
Release date
2018-01-31 23:51:01 UTC+0000
Version (Date)
#1 (2018-01-31 23:51:01 UTC+0000, Updated: 2019-08-16 09:21:21 UTC+0000)
History
Date Mode Version Status Comments
2017-11-03 16:24:31 UTC+0000 first import #1 valid version first version
Analysis
The optical constants from the UV/vis to the MIR (15micron) were determined from the reflectance (spectra measured with FTIR and Lambda 19 merged) by a Lorentzian-oscillator fit, while the real and imaginary parts in the FIR were derived separately from the reflectance and from the transmittance of a 0.06mm thick thin section, respectively.
Quality flag
4