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Absolute Spectroradiometric Measurements
1Physical Laboratory Rijksuniversiteit Utrecht, Netherlands.
Summary
This study surveys standard radiation sources and detectors for spectroradiometry. It details methods for measuring radiation, focusing on calibrated detectors and spectral transmittance factors.
Area of Science:
- Radiometry
- Optical Physics
- Metrology
Background:
- Accurate radiation measurement is crucial in various scientific fields.
- Two primary methods exist: comparison with standard sources or using calibrated detectors.
- Understanding spectral transmittance is key for detector-based measurements.
Purpose of the Study:
- To provide a comprehensive overview of available standard radiation sources for spectroradiometry.
- To discuss various radiation detectors and their properties.
- To highlight essential factors for accurate radiation measurements.
Main Methods:
- Survey of established standard radiation sources: cavity radiator, tungsten strip lamp, carbon arc anode, xenon arc, and cascade arc.
- Discussion of absolute detectors, including the absolute bolometer and thermopile.
- Explanation of the importance of spectral transmittance factor for optical components.
Main Results:
- Identified and described key standard sources for spectroradiometry.
- Characterized properties of absolute bolometers and thermopiles.
- Emphasized the necessity of spectral transmittance data for precise measurements.
Conclusions:
- Standard sources and calibrated detectors are vital for accurate radiation measurement.
- Knowledge of spectral transmittance is essential when using calibrated detectors.
- This survey serves as a guide to available tools and considerations in spectroradiometry.
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