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Proceedings Paper

A 512-Channel Photodiode Array For Solar Observations
Author(s): Richard B. Dunn; David M. Rust; Glenn E. Spence
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Paper Abstract

The Sacramento Peak Observatory has developed and placed in operation an array of photodiodes in the focal plane of a high dispersion spectrograph. The diodes record solar phenomena in the 4000 - 11000 Å range. Signals from the diodes are digitized and computer processed into photographs or other output forms in real time. By varying the placement of 32-diode blocks in the spectrograph, any combination of wavelengths may be used in the construction of spectrograms, spectroheliograms, magnetograms and tachograms. Spatial resolutions vary between 1/2 and 2 arcsec with a spectral resolution of up to 0.02 Å. The signal-to-noise ratio for a single observation is limited in most cases by scintillation to 300:1. Several examples of computer processed photograms are given.

Paper Details

Date Published: 1 September 1974
PDF: 8 pages
Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); doi: 10.1117/12.953933
Show Author Affiliations
Richard B. Dunn, AFCRL (United States)
David M. Rust, AFCRL (United States)
Glenn E. Spence, AFCRL (United States)


Published in SPIE Proceedings Vol. 0044:
Instrumentation in Astronomy II
Lewis Larmore; Donald H. Menzel; David Crawford, Editor(s)

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