Abstract

A series of magnetically focused, electronographic image converters has been developed for use in far-uv photography and spectroscopy. The use of internal reflecting optics has enabled full advantage to be taken of the very high quantum yields of front-surface alkali halide photocathodes, resulting in over-all detection efficiencies a factor of 10 to 30 higher than similar systems using SC–5 film. An all-reflecting objective spectrograph using this system with Schwarzchild optics has been constructed for obtaining stellar spectra in the 1000-1400-Å wavelength range, as well as a similar system based on Schmidt type optics for stellar spectroscopy in the 1230-2000-Å wavelength range. Also, smaller Schmidt type instruments have been developed for direct stellar photography in the far uv.

© 1969 Optical Society of America

Application of Photographic Materials In Astronomy

Arthur A. Hoag and William C. Miller
Appl. Opt. 8(12) 2417-2430 (1969)

Imaging detectors for the ultraviolet

C. I. Coleman
Appl. Opt. 20(21) 3693-3703 (1981)

Dyed Photographic Emulsions for Improved Recording of Projected Images

R. E. Kerwin
Appl. Opt. 8(9) 1891-1895 (1969)

A High Gain, Time-Resolving Spectrograph for the Diagnosis of Laboratory Simulated Reentry

I. D. Liu and J. R. Baskett
Appl. Opt. 8(6) 1141-1147 (1969)

Mesh-based semitransparent photocathodes

George R. Carruthers
Appl. Opt. 14(7) 1667-1672 (1975)