A new measuring machine in Paris

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photography, Microdensitometers, Photometry, Arrays, Astronomical Observatories, Data Acquisition, Microprocessors, On-Line Systems, Photodiodes, Photographic Plates, Scanning

Scientific paper

A new photographic measuring machine is under construction at the Paris Observatory. The amount of transmitted light is measured by a linear array of 1024 photodiodes. Carriage control, data acquisition and on line processing are performed by microprocessors, a S.E.L. 32/27 computer, and an AP 120-B Array Processor. It is expected that a Schmidt telescope plate of size 360 mm square will be scanned in one hour with pixel size of ten microns.

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