The automated photographic measuring facility at Cambridge

Details The automated photographic measuring facility at Cambridge The automated photographic measuring facility at Cambridge

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984asmd.conf..277k&link_type=abstract

In NASA. Goddard Space Flight Center Astron. Microdensitometry Conf. p 277-288 (SEE N84-28020 18-35)

Computer Science

Performance

Astronomical Photography, Astronomical Photometry, Image Processing, Microdensitometers, Algorithms, Computers, Image Reconstruction, Lasers, Nonlinear Filters, Photomultiplier Tubes, Scanning, Signal Processing, Spatial Resolution

Scientific paper

The design and performance of the automated photographic measuring facility at Cambridge is described. It consists of a precision laser scanning microdensitometer connected to a series of computers that process the data on-line. Plates up to 350 mm square can be measured. The microdensitometer samples the plate to 12 bit accuracy at a speed of 230,000 samples/second. The positional accuracy is better than a micron. Other features include platen rotation and automatic focus.

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