Abstract

We have built an instrument that counts pulses from photomultipliers that look at four bands of solar continuum, recording the changes in intensity during an eclipse. We use a plywood spectrograph to select an ultraviolet band and interference filters for the others. The number of counts seen in 120sec is displayed for the subsequent 120sec on binary light-emitting diodes which are photographed. Our experiment can attain a spatial resolution of better than 0.1 see of arc and an accuracy in irradiance of better than 3%.

© 1970 Optical Society of America

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