A 512-Channel Photodiode Array For Solar Observations

Richard B. Dunn; David M. Rust; Glenn E. Spence

doi:10.1117/12.953933

1 September 1974 A 512-Channel Photodiode Array For Solar Observations

Richard B. Dunn, David M. Rust, Glenn E. Spence

Proceedings Volume 0044, Instrumentation in Astronomy II; (1974) https://doi.org/10.1117/12.953933
Event: Instrumentation in Astronomy, 1974, Tucson, United States

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.

Citation Download Citation

Richard B. Dunn, David M. Rust, and Glenn E. Spence "A 512-Channel Photodiode Array For Solar Observations", Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); https://doi.org/10.1117/12.953933

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