Nonuniformity corrections for a spectrally agile sensor

William F. O'Neil

doi:10.1117/12.138973

5 January 1993 Nonuniformity corrections for a spectrally agile sensor

William F. O'Neil

Proceedings Volume 1762, Infrared Technology XVIII; (1993) https://doi.org/10.1117/12.138973
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

Westinghouse is developing a detector array whose spectral characteristics can be modified dynamically. The compensation of the detectors for variations in gain, offset, and spectral characteristics provides new challenges for signal processing. In this paper, the compensation process is presented treating the detector as a 'black box'. The method includes dither scanning to provide orthogonalization of the detector with the scene being viewed, plus signal processing algorithms to establish fundamental detector parameters, and the required correction values. The paper includes the description of the detector black box characteristics, the basic application algorithm, and the correction algorithms. It is concluded that the use of a combination of factory calibrations plus dither scan compensation techniques will provide differential spectral amplitude resolution between any object and the background of better than one percent. For absolute spectral discrimination, the addition of focal plane temperature control for long term stability will provide the same capability. Spectral wavelength resolution of a few percent is projected.

Citation Download Citation

William F. O'Neil "Nonuniformity corrections for a spectrally agile sensor", Proc. SPIE 1762, Infrared Technology XVIII, (5 January 1993); https://doi.org/10.1117/12.138973

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