5 July 2000 Intensified CCD fringe tracker
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A CCD-based fringe detection system is under development at the Navy Prototype Optical Interferometer. The purpose of this device is threefold: It will utilize the second output beam from the beam combiner which currently is described. It will provide a versatile science instrument which may be used for special investigations while fringe tracking is carried out by the existing APD systems. Finally, it will provide a more powerful and flexible real-time fringe tracking system, capable of tracking on six simultaneous baselines. This system is designed around an intensified 512-pixel line-scan camera, which detects the output of three spectrometers at up to 79 delay points every millisecond. This results in a sustained data rate of over 40 MB/s. The data are used to close the real-time servo loop, and the raw data are archived to a 145 GB RAID. The requirements that this system must meet are discussed followed by a description of the hardware. The statistics of photon counting with this device are discussed from a theoretical standpoint.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marvin E. Germain, "Intensified CCD fringe tracker", Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390183; https://doi.org/10.1117/12.390183


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