1 September 1972 Electronographic Cameras For Space Astronomy
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Magnetically-focused electrono-graphic cameras have been under development at the Naval Research Laboratory for use in far-ultraviolet imagery and spectrography, primarily in astronomical and optical-geophysical observations from sounding rockets and space vehicles. Most of this work has been with cameras incorporating internal optics of the Schmidt or wide-field all-reflecting types. These cameras have flown on a number of sounding rocket missions for stellar ultraviolet studies, and are planned for addition-al missions on sounding rockets and space vehicles in the near future. More recently, we have begun development of electronographic spectro-graphs incorporating an internal concave grating, operating at normal or grazing incidence. We also are developing electronographic image tubes of the conventional end-window-photo-cathode type, for far-ultraviolet imagery at the focus of a large space telescope, with image formats up to 120 mm in diameter. Our work so far has been with air-exposable alkalihalide photocathodes sensitive in the wavelength range below 2100 A. We are presently under-taking to extend the utility of the electronographic Schmidt and end-window devices toward longer wave-lengths, by the use of appropriate photocathode materials.
© (1972) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
George R. Carruthers, Chet B. Opal, E. O. Hulburt, "Electronographic Cameras For Space Astronomy", Proc. SPIE 0028, Instrumentation in Astronomy I, (1 September 1972); doi: 10.1117/12.953539; https://doi.org/10.1117/12.953539

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