Modulation transfer function measurements on a MWIR T2SL focal plane array in IDDCA configuration

Jean Nghiem; Sylvie Bernhardt; Julien Jaeck; Sophie Derelle; Edouard Huard; Jérôme Primot; Linda Höglund; Eric Costard; Philippe Christol; Isabelle Ribet-Mohamed

doi:10.1117/12.2304793

26 April 2018 Modulation transfer function measurements on a MWIR T2SL focal plane array in IDDCA configuration

Jean Nghiem, Sylvie Bernhardt, Julien Jaeck, Sophie Derelle, Edouard Huard, Jérôme Primot, Linda Höglund, Eric Costard, Philippe Christol, Isabelle Ribet-Mohamed

Author Affiliations +

Proceedings Volume 10625, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX; 1062508 (2018) https://doi.org/10.1117/12.2304793
Event: SPIE Defense + Security, 2018, Orlando, FL, United States

Abstract

Type-II InAs/GaSb superlattice (T2SL) has recently matured into a commercially available technology addressing both MWIR and LWIR spectral domains. As the prerequisites such as Quantum Efficiency (QE) and dark current were met, more advanced figures of merits related to the ElectroOptic (EO) system as a whole can now be studied in order to position this technology. In this paper, we focus on modulation transfer function (MTF) measurements. Knowing the MTF of a detector is indeed of primary importance for the EO system designers, since spatial filtering affects the system range. We realized MTF measurements on a 320x256 MWIR T2SL FPA provided by IRnova, using a Continuously Self Imaging Grating (CSIG). The advantage of this experimental configuration is that no high performance projection optics is required. Indeed, the CSIG exploits the self-imaging property (known as Talbot effect) to project a pattern with known spatial frequencies on the photodetector. Such MTF measurements have never been done in Integrated Detector Dewar Cooler Assembly (IDDCA) configuration, so we had to study the effect of the vibrations induced by the cryocooler. Vibrations indeed affect the MTF measurement in the same way electrical diffusion would do. Using three accelerometers we optimized our experimental setup and extracted MTF measurements with reduced vibrations. The pixel size is 26μm for a pitch of 30μm.

Citation Download Citation

Jean Nghiem, Sylvie Bernhardt, Julien Jaeck, Sophie Derelle, Edouard Huard, Jérôme Primot, Linda Höglund, Eric Costard, Philippe Christol, and Isabelle Ribet-Mohamed "Modulation transfer function measurements on a MWIR T2SL focal plane array in IDDCA configuration", Proc. SPIE 10625, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXIX, 1062508 (26 April 2018); https://doi.org/10.1117/12.2304793

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Modulation transfer functions

Staring arrays

Sensors

Mid-IR

Spatial frequencies

Quantum efficiency

Signal to noise ratio

Show All Keywords

Keywords/Phrases

Search In:

Publication Years