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Related Experiment Video

Updated: Jun 9, 2026

Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
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Published on: December 14, 2017

Bolometric detectors: optimization for differential radiometers.

E N Glezer, A E Lange, T M Wilbanks

    Applied Optics
    |August 31, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Differential radiometers using bolometric detectors can achieve high common-mode rejection. This study minimizes common-mode response in ac bridge configurations, enhancing signal stability under varying radiative loads.

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    Area of Science:

    • Radiometry
    • Optical Engineering
    • Detector Physics

    Background:

    • Differential radiometers utilize matched bolometric detectors in an ac bridge for power difference measurements.
    • Common-mode response from detector mismatch can destabilize signals under fluctuating radiative loads.

    Purpose of the Study:

    • To analyze and mitigate common-mode response in differential radiometers with semiconductor thermistor bolometers.
    • To improve the stability of difference signals despite large and time-varying common-mode radiative loads.

    Main Methods:

    • Constructing a differential radiometer with two matched bolometric detectors in an ac bridge.
    • Analyzing common-mode response arising from detector parameter mismatches.
    • Investigating the effect of electrical-power dissipation on common-mode rejection.

    Main Results:

    • The ac bridge can be trimmed to null the common-mode response at a specific radiative load.
    • Changes in radiative load induce a second-order common-mode response.
    • Increasing electrical-power dissipation minimizes this second-order response, albeit with reduced sensitivity.

    Conclusions:

    • Common-mode rejection ratios exceeding 10^3 are achievable with typical detector mismatches under 20% radiative load variations.
    • Optimizing power dissipation is key to enhancing stability in differential radiometers under dynamic conditions.