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Proceedings Paper

Intensified CCD fringe tracker
Author(s): Marvin E. Germain
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Paper Abstract

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.

Paper Details

Date Published: 5 July 2000
PDF: 6 pages
Proc. SPIE 4006, Interferometry in Optical Astronomy, (5 July 2000); doi: 10.1117/12.390183
Show Author Affiliations
Marvin E. Germain, U.S. Naval Observatory (United States)

Published in SPIE Proceedings Vol. 4006:
Interferometry in Optical Astronomy
Pierre J. Lena; Andreas Quirrenbach, Editor(s)

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