An ultrahigh-speed digitizer for the Harvard College Observatory astronomical plates

Details An ultrahigh-speed digitizer for the Harvard College Observatory astronomical plates An ultrahigh-speed digitizer for the Harvard College Observatory astronomical plates

2006-10-12

arxiv.org/abs/astro-ph/0610351v1

Applications of Digital Image Processing XXIX, edited by Andrew G. Tescher, Proceedings of SPIE, Vol. 6312, 17 (2006)

Astronomy and Astrophysics

Astrophysics

12 pages, 9 figures, 1 table; presented at SPIE (July, 2006) and published in Proceedings

Scientific paper

10.1117/12.681365

A machine capable of digitizing two 8 inch by 10 inch (203 mm by 254 mm) glass astrophotographic plates or a single 14 inch by 17 inch (356 mm by 432 mm) plate at a resolution of 11 microns per pixel or 2309 dots per inch (dpi) in 92 seconds is described. The purpose of the machine is to digitize the \~500,000 plate collection of the Harvard College Observatory in a five year time frame. The digitization must meet the requirements for scientific work in astrometry, photometry, and archival preservation of the plates. This paper describes the requirements for and the design of the subsystems of the machine that was developed specifically for this task.

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