Modulation transfer function measurements of HgCdTe long wavelength infrared arrays for the Near-Earth Object Surveyor
Author
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.
Affiliation
University of Arizona, Lunar and Planetary Sciences LaboratoryIssue Date
2022
Metadata
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SPIECitation
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.Rights
Copyright © 2022 SPIE.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.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. © 2022 Society of Photo-Optical Instrumentation Engineers (SPIE).Note
Immediate accessISSN
2329-4124Version
Final published versionae974a485f413a2113503eed53cd6c53
10.1117/1.JATIS.8.1.016002