Aspects of this topic are discussed in the following places at Britannica.
...director of the Mount Wilson Observatory and served as director of the Hale Observatories, which comprise Mt. Wilson and Palomar observatories, from 1948 until 1964. In 1938 Bowen invented the image slicer, a device that improves the efficiency of the slit spectrograph, which is used to break up light into its component colours for study. Bowen retired as observatory director in 1964,...
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