Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor

Gregory R. Zengilowski; Craig W. McMurtry; Judith L. Pipher; Nicholas S. Reilly; Meghan L. Dorn; Amy K. Mainzer; Andre F. Wong; Lennon Reinhart; Trent Newswander; Ryan Luder

doi:10.1117/1.JATIS.8.1.016002

Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor

Gregory R. Zengilowski, Craig W. McMurtry, Judith L. Pipher, Nicholas S. Reilly, Meghan L. Dorn, Amy K. Mainzer, Andre F. Wong, Lennon Reinhart, Trent Newswander, Ryan Luder

Planetary Sciences

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

The modulation transfer function (MTF) is a useful measure in image quality analysis and performance budget determination. Sensitive long wavelength infrared (LWIR) detectors for astronomical space telescopes require slight modifications to the existing MTF measurement methods due to the increased prevalence of high dark current pixels. Presented here are the specifics of a modified slanted edge method to determine the MTF in λc > 10 μm HgCdTe detectors to be used with the planned Near-Earth Object Surveyor Mission. The measured MTF at Nyquist using 6 μm light is 0.22 ± 0.02 and is 0.25 ± 0.02 using 10 μm light for both 250 and 350 mV of applied reverse bias. These measurements are from edge spread functions with median signal values around 50% of the well depth, as the MTF is expected to change with signal value due to two brighter-fatter type effects. The expected trends caused by the influences of these two effects and the expected trends with wavelength of absorbed photons are all observed.

Original language	English (US)
Article number	016002
Journal	Journal of Astronomical Telescopes, Instruments, and Systems
Volume	8
Issue number	1
DOIs	https://doi.org/10.1117/1.JATIS.8.1.016002
State	Published - Jan 1 2022

Keywords

HgCdTe
LWIR
brighter-fatter effect
image quality
infrared detector
modulation transfer function

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Control and Systems Engineering
Instrumentation
Astronomy and Astrophysics
Mechanical Engineering
Space and Planetary Science

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10.1117/1.JATIS.8.1.016002

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Zengilowski, G. R., McMurtry, C. W., Pipher, J. L., Reilly, N. S., Dorn, M. L., Mainzer, A. K., Wong, A. F., Reinhart, L., Newswander, T., & Luder, R. (2022). Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor. Journal of Astronomical Telescopes, Instruments, and Systems, 8(1), Article 016002. https://doi.org/10.1117/1.JATIS.8.1.016002

Zengilowski, GR, McMurtry, CW, Pipher, JL, Reilly, NS, Dorn, ML, Mainzer, AK, Wong, AF, Reinhart, L, Newswander, T & Luder, R 2022, 'Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor', Journal of Astronomical Telescopes, Instruments, and Systems, vol. 8, no. 1, 016002. https://doi.org/10.1117/1.JATIS.8.1.016002

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title = "Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor",

abstract = "The modulation transfer function (MTF) is a useful measure in image quality analysis and performance budget determination. Sensitive long wavelength infrared (LWIR) detectors for astronomical space telescopes require slight modifications to the existing MTF measurement methods due to the increased prevalence of high dark current pixels. Presented here are the specifics of a modified slanted edge method to determine the MTF in λc > 10 μm HgCdTe detectors to be used with the planned Near-Earth Object Surveyor Mission. The measured MTF at Nyquist using 6 μm light is 0.22 ± 0.02 and is 0.25 ± 0.02 using 10 μm light for both 250 and 350 mV of applied reverse bias. These measurements are from edge spread functions with median signal values around 50% of the well depth, as the MTF is expected to change with signal value due to two brighter-fatter type effects. The expected trends caused by the influences of these two effects and the expected trends with wavelength of absorbed photons are all observed.",

keywords = "HgCdTe, LWIR, brighter-fatter effect, image quality, infrared detector, modulation transfer function",

author = "Zengilowski, {Gregory R.} and McMurtry, {Craig W.} and Pipher, {Judith L.} and Reilly, {Nicholas S.} and Dorn, {Meghan L.} and Mainzer, {Amy K.} and Wong, {Andre F.} and Lennon Reinhart and Trent Newswander and Ryan Luder",

note = "Funding Information: Funding for this work was received from Cornell University through New York Space Grant No. 80NSSC20M0096, the Jet Propulsion Laboratory through the Near-Earth Object Camera (NEOCam) Extended Phase A Subcontract 1573311, and the University of Arizona through the Near-Earth Object Surveillance Mission (NEOSM) Extended Phase A Grant No. 80MSFC20C0045. In addition, the authors would like to thank the reviewers for engaging with the material and for their constructive feedback and support in strengthening this work. Publisher Copyright: {\textcopyright} 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).",

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AU - Zengilowski, Gregory R.

AU - McMurtry, Craig W.

AU - Pipher, Judith L.

AU - Reilly, Nicholas S.

AU - Dorn, Meghan L.

AU - Mainzer, Amy K.

AU - Wong, Andre F.

AU - Reinhart, Lennon

AU - Newswander, Trent

AU - Luder, Ryan

N1 - Funding Information: Funding for this work was received from Cornell University through New York Space Grant No. 80NSSC20M0096, the Jet Propulsion Laboratory through the Near-Earth Object Camera (NEOCam) Extended Phase A Subcontract 1573311, and the University of Arizona through the Near-Earth Object Surveillance Mission (NEOSM) Extended Phase A Grant No. 80MSFC20C0045. In addition, the authors would like to thank the reviewers for engaging with the material and for their constructive feedback and support in strengthening this work. Publisher Copyright: © 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).

PY - 2022/1/1

Y1 - 2022/1/1

N2 - The modulation transfer function (MTF) is a useful measure in image quality analysis and performance budget determination. Sensitive long wavelength infrared (LWIR) detectors for astronomical space telescopes require slight modifications to the existing MTF measurement methods due to the increased prevalence of high dark current pixels. Presented here are the specifics of a modified slanted edge method to determine the MTF in λc > 10 μm HgCdTe detectors to be used with the planned Near-Earth Object Surveyor Mission. The measured MTF at Nyquist using 6 μm light is 0.22 ± 0.02 and is 0.25 ± 0.02 using 10 μm light for both 250 and 350 mV of applied reverse bias. These measurements are from edge spread functions with median signal values around 50% of the well depth, as the MTF is expected to change with signal value due to two brighter-fatter type effects. The expected trends caused by the influences of these two effects and the expected trends with wavelength of absorbed photons are all observed.

AB - The modulation transfer function (MTF) is a useful measure in image quality analysis and performance budget determination. Sensitive long wavelength infrared (LWIR) detectors for astronomical space telescopes require slight modifications to the existing MTF measurement methods due to the increased prevalence of high dark current pixels. Presented here are the specifics of a modified slanted edge method to determine the MTF in λc > 10 μm HgCdTe detectors to be used with the planned Near-Earth Object Surveyor Mission. The measured MTF at Nyquist using 6 μm light is 0.22 ± 0.02 and is 0.25 ± 0.02 using 10 μm light for both 250 and 350 mV of applied reverse bias. These measurements are from edge spread functions with median signal values around 50% of the well depth, as the MTF is expected to change with signal value due to two brighter-fatter type effects. The expected trends caused by the influences of these two effects and the expected trends with wavelength of absorbed photons are all observed.

KW - HgCdTe

KW - LWIR

KW - brighter-fatter effect

KW - image quality

KW - infrared detector

KW - modulation transfer function

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Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor

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Keywords

ASJC Scopus subject areas

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