Generalized focal plane array modulation transfer function estimation approach for nonstationary laser speckle random processes

Plummer Philip J.; Barnard Kenneth J.; Marciniak Michael A.

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Generalized focal plane array modulation transfer function estimation approach for nonstationary laser speckle random processes

机译：Generalized focal plane array modulation transfer function estimation approach for nonstationary laser speckle random processes

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The infrared (IR) imaging community has a need for direct IR detector evaluation due to the continued demand for small pixel pitch detectors, the emergence of strained-layer-superlattice devices, and the associated lateral carrier diffusion issues. Conventional laser speckle-based modulation transfer function estimation is dependent on Fresnel propagation and limited to paraxial geometries, preventing the utilization of this approach on small pixel pitch IR devices. This paper presents a generalized approach for determining a focal plane array (FPA) system input power spectral density, utilizing numerical evaluation of Rayleigh-Sommerfeld speckle irradiance autocorrelation functions, speckle irradiance spectral analysis using the Wigner distribution function, and experimental error quantification incurred from making wide-sense-stationary assumptions regarding the associated laser speckle random process. The effort's final result is an experimental demonstration of an FPA resolution estimation technique valid in nonparaxial test scenarios. (C) 2022 Society of Photo-Optical Instrumentation Engineers (SPIE)

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来源
《Optical Engineering》 |2022年第6期|064104-1-064104-15|共15页
作者
Plummer Philip J.; Barnard Kenneth J.; Marciniak Michael A.;
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作者单位

Sensors Directorate;

Air Force Inst Technol;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类光学仪器;
关键词
infrared; laser speckle; focal plane array; modulation transfer function; power spectral density; autocorrelation function; Fresnel; Wigner distribution function; SIZE;

Generalized focal plane array modulation transfer function estimation approach for nonstationary laser speckle random processes

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