Measurement of the spectral response of long-wavelength infrared focal plane arrays

John Edward Hubbs; Douglas C. Arrington; Mark E. Gramer; Gary A. Dole

doi:10.1117/12.210569

30 May 1995 Measurement of the spectral response of long-wavelength infrared focal plane arrays

John Edward Hubbs, Douglas C. Arrington, Mark E. Gramer, Gary A. Dole

Proceedings Volume 2474, Smart Focal Plane Arrays and Focal Plane Array Testing; (1995) https://doi.org/10.1117/12.210569
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

A system for measuring the average relative spectral response of long wavelength infrared focal plane arrays (IRFPA) has been developed. Typically, the spectral response of sister detectors, fabricated on the same wafer as the FPA detectors are characterized in lieu of characterizing the actual IRFPA and it is generally assumed that the IRFPA detectors are equivalent to the sister detectors. On occasion, however, this assumption has proven to be incorrect. The spectral capability described here was implemented by interfacing an IRFPA test station to a long wavelength monochrometer, allowing the spectral response of the detectors in the IRFPA to be measured while the IRFPA operates in a normal manner. The spectral response measurements made with this system are validated by determining the peak wavelength responsivity of a long wavelength IRFPA, whose spectral response was measured with the system, using various blackbody temperatures. Sample spectral response data are presented along with the responsivities determined. With this spectral response measurement and a blackbody IRFPA measurement capability, complete radiometric characterization of IRFPAs can be performed.

Citation Download Citation

John Edward Hubbs, Douglas C. Arrington, Mark E. Gramer, and Gary A. Dole "Measurement of the spectral response of long-wavelength infrared focal plane arrays", Proc. SPIE 2474, Smart Focal Plane Arrays and Focal Plane Array Testing, (30 May 1995); https://doi.org/10.1117/12.210569

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