1 December 1979 Electrographic Instrumentation For Ultraviolet Imaging And Spectrography
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Optical Engineering, 18(6), 186638 (1979). doi:10.1117/12.7972447
The latest results in the Naval Research Laboratory program of far-ultraviolet electrographic camera development, and application of these cameras to astrophysical and upper-atmospheric investigations, are presented. A new large electrographic Schmidt camera, of 15 cm aperture and f/2 focal ratio, has been successfully used in two sounding rocket flights, one for direct imagery in the 1230-2000 A wavelength range and the second for objective spectrography in the 950-2000 A range, of stars and nebulae in the Cygnus region of the sky. The camera has an 11° field of view and better than 30 arc sec resolution (2 A spectral resolution with 600 line/mm objective grating). A nebular spectrograph, based on a microchannel-intensified electrographic Schmidt camera, was then payload of a June 1979 rocket flight. It covers the 1050-2000 A range, and can reach emission line features as faint as 10 Rayleighs in 60 second ex-posures with 5 A spectral resolution. Electrographic cameras with mesh-based semitransparent photocathodes, capable of observations in the extreme ultraviolet below 1050 A, are being developed for a number of space science applications. A camera with microchannel intensification is the detector in an XUV airglow/auroral spectrograph used in a February 1978 rocket flight, and cameras without microchannel intensification are proposed for various solar XUV spectrographic and spectroheliographic applications.
George R. Carruthers, "Electrographic Instrumentation For Ultraviolet Imaging And Spectrography," Optical Engineering 18(6), 186638 (1 December 1979). https://doi.org/10.1117/12.7972447


Extreme ultraviolet


Spectral resolution

Ultraviolet radiation



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