Efficient Tow-Dimensional Photon Counting for high-S/N Measurements of Weak Spectra

Abstract

An efficient two-dimensional photon counting procedure is described for high-S/N measurements of weak spectra using an image-intensified CCD camera. By using a procedure which utilizes the signal intensities of more than one pixel in judging a single photon detection, the photon detection efficeincy was increased by _??_40% in comparison with the method where a photon detection is based on the indensity of one pixel.