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Spectral Power and Irradiance Responsivity Calibration of InSb Working-Standard Radiometers.

G Eppeldauer, M Rácz

    Applied Optics
    |March 21, 2008
    PubMed
    Summary
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    New indium antimonide (InSb) power-irradiance meters were developed to maintain the National Institute of Standards and Technology (NIST) spectral responsivity scale. These improved radiometers serve as reliable working standards for calibrations.

    Area of Science:

    • Optics and Photonics
    • Radiometry
    • Metrology

    Background:

    • Maintaining accurate spectral responsivity scales is crucial for scientific measurements.
    • Indium antimonide (InSb) detectors offer specific spectral ranges for irradiance measurements.

    Purpose of the Study:

    • To develop and characterize improved InSb power-irradiance meters.
    • To ensure the maintenance of the NIST spectral responsivity scale.
    • To provide reliable working standards for calibrations.

    Main Methods:

    • Development and characterization of new InSb power-irradiance meters.
    • Calibration of InSb radiometers against a transfer-standard cryogenic bolometer.
    • Derivation of spectral irradiance responsivities from spectral power responsivities using aperture area measurements.

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    Main Results:

    • New InSb power-irradiance meters demonstrate improved performance.
    • The meters successfully maintain the NIST spectral responsivity scale from 2 to 5.1 µm.
    • The calibrated InSb radiometers function as effective working standards.

    Conclusions:

    • The developed InSb radiometers are suitable for routine spectral power and irradiance responsivity calibrations.
    • These instruments enhance the traceability of radiometric measurements to primary standards.
    • The improved meters contribute to the accuracy and reliability of optical radiation measurements.