Abstract

A new instrument, a camera obscura with a number of light apertures (or slits), is suggested for observation of EAS images in Cerenkov light. Its advantages (over mirror-imaging telescopes) are a low night-sky light noise, a wide field of view and absence of aberrations. This camera is effective for measurements of bright objects such as EAS of energies higher than 103 TeV. Analysis of EAS images in the 'knee' region of the primary cosmic-ray energy spectrum (E0 approximately=3*103 TeV) could give new information on the expected variation of cosmic-ray composition in this energy region.

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