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SOC-100 HDR Hemispherical Directional Reflectometer
The SOC-100 Hemispherical Directional Reflectometer measures polarized, angular diffuse reflectance measurements from 8° to 80° incident angles in the 2.0 to 25.0 μm spectral range. Reflectance for parallel, perpendicular & unpolarized beam at 12 user-selected angles. Separation of reflectance into diffuse and specular components. Collimated and scattered transmittance at 0° incidence. Directional emittance as a function of wavelength, angle from 8° to 80°, and temperature beyond 500°C. Total hemispherical emittance as a function of temperature. Operates as an attachment to the Thermo Scientific™ Nicolet™ iS50 FTIR Spectrometer.
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Spectral Range |
2.0 – 25.0 λ (μm) / 5000 – 400 cm-1 Range can be modified based on FTIR optics. |
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Method |
Automated reflectometer 18” electroformed hemiellipsoid |
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Calibration |
Comparison of scans of the specimen sample and calibrated specular gold standard at each angle polarization combination establishes accurate calibration of the measured directional reflectance. |
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Source |
A custom heated cavity provides uniform 2π steradian radiation into the subtended hemiellipsoid from a 0.75” ID opening centered at one ellipse focus. All cavity surfaces, excepting the opening, are insulated with high performance Min-K insulation and the unit is surrounded by a water cooled jacket. |
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Resolution |
Depending on data requirement: 2, 4, 8, 16, or 32 cm-1 resolution may be employed. |
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Sample Size |
Standard: 1” OD. Sample mounting can accommodate up to 3” x 4” samples |
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Automation |
The automated process is computer controlled by five stepper motors which provide: polarization (parallel, perpendicular and unpolarized), variable incident angles, sample standard interchange, beamblocker angles. The source beam chopping is synchronized to the movement of the FTIR mirror which eliminates the sample self-emission error. |
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Bench Space Required |
8’ of bench space, min 30” depth to allow for iS-50- FTIR, SOC-100, temperature controller and computer |
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Electrical Requirement |
Two 15 amp 120VAC circuits to support the SOC-100, The Thermo-Fischer iS-50 FTIR and the Computer. |
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Water Requirement |
Room temperature, 0.5 GPM filtered to 50 micron particulate. Two ¼” compression fittings at the rear of the SOC-100. |
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Purge Gas Requirement |
0.5 – 1.0 SCFM inert dry Nitrogen or Clean Dry Air. ¼” quick connect fittings at the rear of FTIR and SOC-100. |
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Operating Temperature of Environment |
60 to 80 degrees |