27 June 2006 The LSST camera system overview
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Abstract
The LSST camera is a wide-field optical (0.35-1um) imager designed to provide a 3.5 degree FOV with better than 0.2 arcsecond sampling. The detector format will be a circular mosaic providing approximately 3.2 Gigapixels per image. The camera includes a filter mechanism and, shuttering capability. It is positioned in the middle of the telescope where cross-sectional area is constrained by optical vignetting and heat dissipation must be controlled to limit thermal gradients in the optical beam. The fast, f/1.2 beam will require tight tolerances on the focal plane mechanical assembly. The focal plane array operates at a temperature of approximately -100°C to achieve desired detector performance. The focal plane array is contained within an evacuated cryostat, which incorporates detector front-end electronics and thermal control. The cryostat lens serves as an entrance window and vacuum seal for the cryostat. Similarly, the camera body lens serves as an entrance window and gas seal for the camera housing, which is filled with a suitable gas to provide the operating environment for the shutter and filter change mechanisms. The filter carousel can accommodate 5 filters, each 75 cm in diameter, for rapid exchange without external intervention.
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Kirk Gilmore, Steven Kahn, Martin Nordby, David Burke, Paul O'Connor, John Oliver, Veljko Radeka, Terry Schalk, Rafe Schindler, "The LSST camera system overview", Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62690C (27 June 2006); doi: 10.1117/12.673236; https://doi.org/10.1117/12.673236
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