Importance of frame rate during longwave infrared focal plane array evaluation

A. C. G. dos Santos; A. Silva Filho; L. B. de Sá; N. M. Abe

doi:10.1117/12.2664002

14 June 2023 Importance of frame rate during longwave infrared focal plane array evaluation

A. C. G. dos Santos, A. Silva Filho, L. B. de Sá, N. M. Abe

Proceedings Volume 12533, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIV; 125330X (2023) https://doi.org/10.1117/12.2664002
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Frame rate is one of the most important parameters to evaluate the performance of commercial longwave infrared focal plane arrays (LWIR FPA). However, in the literature, there are few works that investigate the frame rate effects on the behavior of the main figures of merit (FOM). In this work, the FOM of a LWIR FPA are analyzed changing the frame rate from 25 to 60. In order to verify the frame rate influence on the FOM, the FPA raw data are acquired when it is exposed to a wide area blackbody at temperatures of 25°C and 60°C. It is observed that, under certain conditions, changes in frame rate can improve the noise equivalent temperature difference (NETD) and the signal transfer function (SiTF) by 50% and 60%, respectively. Another point that deserves attention is the unpredicted emergence of a minimum point, when 45fps is employed, in the detector operability versus frame rate curve. As expected, the output voltage pixel response is also affected when the frame rate is changed. Particularly, for the 60°C temperature, variations greater than 60% on this voltage are observed.

Conference Presentation

Citation Download Citation

A. C. G. dos Santos, A. Silva Filho, L. B. de Sá, and N. M. Abe "Importance of frame rate during longwave infrared focal plane array evaluation", Proc. SPIE 12533, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing XXXIV, 125330X (14 June 2023); https://doi.org/10.1117/12.2664002

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