Spectral and angular responses of microbolometer IR FPA: a characterization method using a FTIR

Aurélie Touvignon; Alain Durand; Fabien Romanens; Julien Favreau; Olivier Gravrand; Christel-Loïc Tisse

doi:10.1117/12.2053448

29 May 2014 Spectral and angular responses of microbolometer IR FPA: a characterization method using a FTIR

Aurélie Touvignon, Alain Durand, Fabien Romanens, Julien Favreau, Olivier Gravrand, Christel-Loïc Tisse

Proceedings Volume 9071, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXV; 90710W (2014) https://doi.org/10.1117/12.2053448
Event: SPIE Defense + Security, 2014, Baltimore, MD, United States

Abstract

In order to evaluate the impact of technological evolutions on the spectral responsivity of microbolometer FPAs (Focal Plane Arrays) as well as to find out a way to estimate the mechanical stability of microbolometric pixel membranes, ULIS is proposing a new method to measuring the spectral response of the detector array over a large region (area of pixels) simultaneously. This is done by tweaking the standard protocol of a commercial FTIR (Fourier Transform InfraRed) spectrometer where the IR detector is replaced by the array to be measured. All the calculations (i.e. interferogram processing) are taken care of externally. We use this new set up to measure the angular spectral response of the detector array and to analyse the relationship between spectral response and mechanical behaviour of the pixel. Firstly the setup of this measurement is presented and some preliminary technical issues are outlined. Then we focus on the results obtained from the measurements on 17μm pitch pixels over a wide range of angles of incidence (from normal to 45° incidence). Finally, we share some theoretical insights on both those results and the inherent limitations of this protocol using a simple optical cavity model.

Citation Download Citation

Aurélie Touvignon, Alain Durand, Fabien Romanens, Julien Favreau, Olivier Gravrand, and Christel-Loïc Tisse "Spectral and angular responses of microbolometer IR FPA: a characterization method using a FTIR", Proc. SPIE 9071, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXV, 90710W (29 May 2014); https://doi.org/10.1117/12.2053448

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