Correctability and long-term stability of infrared focal plane arrays

Werner Gross; Thomas Hierl; Max J. Schulz

doi:10.1117/1.602055

1 May 1999 Correctability and long-term stability of infrared focal plane arrays

Werner Gross, Thomas Hierl, Max J. Schulz

Optical Engineering, Vol. 38, Issue 5, (May 1999). https://doi.org/10.1117/1.602055

The temperature resolution of infrared focal plane arrays is limited by temporal and spatial noise. The spatial noise usually is partially removed by correction procedures. These correction procedures reduce the spatial noise to a magnitude below the temporal noise. The correctability c defined as the ratio of the spatial to the temporal noise is a figure of merit for the state of the correction. We consider the transient degradation of the correctability after correction. A new figure of merit, the long-term stability time constant ?/ts is introduced. This time indicates the duration after a nonuniformity correction during which the spatial noise increases to values higher than that of the temporal noise. Several staring infrared focal plane arrays differing in size and in detector material are investigated. The correctability c is determined after various correction procedures and the long-term stability time ?/ts is measured. The degradation of the correctability is caused by a few individual pixels in the detector array. We can classify three different types of ''bad pixels," which degrade the correctability. These are weak pixels that show a low responsivity and flickering and drifting pixels that show excessive 1/f-noise.

Citation Download Citation

Werner Gross, Thomas Hierl, and Max J. Schulz "Correctability and long-term stability of infrared focal plane arrays," Optical Engineering 38(5), (1 May 1999). https://doi.org/10.1117/1.602055

Published: 1 May 1999

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