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Proceedings Paper

SpectraCAM SPM: a camera system with high dynamic range for scientific and medical applications
Author(s): S. Bhaskaran; D. Baiko; G. Lungu; M. Pilon; S. VanGorden
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Paper Abstract

A scientific camera system having high dynamic range designed and manufactured by Thermo Electron for scientific and medical applications is presented. The newly developed CID820 image sensor with preamplifier-per-pixel technology is employed in this camera system. The 4 Mega-pixel imaging sensor has a raw dynamic range of 82dB. Each high-transparent pixel is based on a preamplifier-per-pixel architecture and contains two photogates for non-destructive readout of the photon-generated charge (NDRO). Readout is achieved via parallel row processing with on-chip correlated double sampling (CDS). The imager is capable of true random pixel access with a maximum operating speed of 4MHz. The camera controller consists of a custom camera signal processor (CSP) with an integrated 16-bit A/D converter and a PowerPC-based CPU running a Linux embedded operating system. The imager is cooled to -40C via three-stage cooler to minimize dark current. The camera housing is sealed and is designed to maintain the CID820 imager in the evacuated chamber for at least 5 years. Thermo Electron has also developed custom software and firmware to drive the SpectraCAM SPM camera. Included in this firmware package is the new Extreme DRTM algorithm that is designed to extend the effective dynamic range of the camera by several orders of magnitude up to 32-bit dynamic range. The RACID Exposure graphical user interface image analysis software runs on a standard PC that is connected to the camera via Gigabit Ethernet.

Paper Details

Date Published: 25 August 2005
PDF: 9 pages
Proc. SPIE 5902, Focal Plane Arrays for Space Telescopes II, 59020D (25 August 2005); doi: 10.1117/12.616134
Show Author Affiliations
S. Bhaskaran, Thermo Electron (United States)
D. Baiko, Thermo Electron (United States)
G. Lungu, Thermo Electron (United States)
M. Pilon, Thermo Electron (United States)
S. VanGorden, Thermo Electron (United States)

Published in SPIE Proceedings Vol. 5902:
Focal Plane Arrays for Space Telescopes II
Thomas J. Grycewicz; Cheryl J. Marshall, Editor(s)

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