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Related Experiment Video

Updated: Jun 22, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Dead pixel replacement in LWIR microgrid polarimeters.

Bradley M Ratliff, J Scott Tyo, James K Boger

    Optics Express
    |June 24, 2009
    PubMed
    Summary

    Dead pixels in long-wavelength infrared (LWIR) imaging arrays are a challenge, especially with micropolarizers. A new redundancy-based dead pixel replacement (DPR) method significantly outperforms traditional approaches for LWIR polarimetric data.

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    Area of Science:

    • Optics
    • Infrared Imaging
    • Sensor Technology

    Background:

    • Nonresponsive pixels, or "dead pixels," degrade the quality of long-wavelength infrared (LWIR) imaging arrays.
    • The presence of micropolarizer arrays in LWIR systems amplifies the dead pixel problem.
    • Conventional dead pixel replacement (DPR) strategies are ineffective for LWIR arrays with micropolarizers due to differing pixel polarizations.

    Purpose of the Study:

    • To develop novel dead pixel replacement (DPR) schemes for LWIR imaging arrays integrated with micropolarizers.
    • To address the limitations of conventional DPR methods in polarimetric LWIR imaging.

    Main Methods:

    • A modified nearest-neighbor replacement method was developed.
    • A second DPR scheme was designed based on redundancy in polarization measurements.

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  • Performance evaluation of both schemes using typical LWIR polarimetric data.

    • Main Results:

    • The modified nearest-neighbor method offers a potential solution.
    • The redundancy-based DPR scheme demonstrated superior performance.
    • The redundancy-based scheme achieved an order-of-magnitude better performance compared to conventional methods for LWIR polarimetric data.

    Conclusions:

    • The redundancy-based DPR scheme is highly effective for LWIR polarimetric imaging.
    • This method significantly improves image quality by accurately replacing dead pixels in challenging LWIR polarimetric arrays.
    • The findings offer a practical solution for enhancing the reliability and usability of LWIR polarimetric imaging systems.