Low-light-level EMCCD color camera

Autor: Wayne W. Frame, Gerald B. Heim, Jon Burkepile
Rok vydání: 2006
Předmět:
Zdroj: Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications III.
ISSN: 0277-786X
DOI: 10.1117/12.667704
Popis: Video cameras have increased in usefulness in military applications over the past four decades. This is a result of many advances in technology and because no one portion of the spectrum reigns supreme under all environmental and operating conditions. The visible portion of the spectrum has the clear advantage of ease of information interpretation, requiring little or no training. This advantage extends into the Near IR (NIR) spectral region to silicon cutoff with little difficulty. Inclusion of the NIR region is of particular importance due to the rich photon content of natural night illumination. The addition of color capability offers another dimension to target/situation discrimination and hence is highly desirable. A military camera must be small, lightweight and low power. Limiting resolution and sensitivity cannot be sacrificed to achieve color capability. Newly developed electron-multiplication CCD sensors (EMCCDs) open the door to a practical low-light/all-light color camera without an image intensifier. Ball Aerospace & Technologies Corp (BATC) has developed a unique color camera that allows the addition of color with a very small impact on low light level performance and negligible impact on limiting resolution. The approach, which includes the NIR portion of the spectrum along with the visible, requires no moving parts and is based on the addition of a sparse sampling color filter to the surface of an EMCCD. It renders the correct hue in a real time, video rate image with negligible latency. Furthermore, camera size and power impact is slight.
Databáze: OpenAIRE
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