Unintended illumination for PMMW systems

Albert Pergande

doi:10.1117/12.796411

18 April 2008 Unintended illumination for PMMW systems

Albert Pergande

Author Affiliations +

Proceedings Volume 6948, Passive Millimeter-Wave Imaging Technology XI; 69480A (2008) https://doi.org/10.1117/12.796411
Event: SPIE Defense and Security Symposium, 2008, Orlando, Florida, United States

Abstract

As Passive Millimeter Wave (PMMW) imagers mature, users have located them in more and more challenging locations. Because PMMW systems typically use natural sky coldness as a contrast source, indoor installations can become problematic. A number of semi-active illumination systems have been proposed, with various degrees of success. A problem many of them suffer from is reversed contrast - the illumination source is considerably hotter than the ambient scene, causing the cameras to act in unexpected ways. The relatively narrow extent of the illumination source is another problem, with speckle and glint often dominating the image. There are a number of unintended illumination sources in indoor locations, and all are poorly understood. This paper will examine several of them, as well as their polarametric properties, and discuss their effects on image quality.

Citation Download Citation

Albert Pergande "Unintended illumination for PMMW systems", Proc. SPIE 6948, Passive Millimeter-Wave Imaging Technology XI, 69480A (18 April 2008); https://doi.org/10.1117/12.796411

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