Abstract

An apparatus based upon photon counting has been constructed that permits detection of very weak fluorescence. The sensitivity of the apparatus was checked by measuring the fluorescence from aqueous solutions of riboflavin. The photon counts increased linearly with the concentration of the solution from 4 × 10⁻¹¹ g/ml to 1 × 10⁻⁶ g/ml. The emission spectra of monolayers of both chlorophyll a and b were also measured with a high signal-to-noise ratio.

© 1973 Optical Society of America

Photomultiplier Single Photon Counting Efficiency

L. Birenbaum and D. B. Scarl
Appl. Opt. 12(3) 519-521 (1973)

High Resolution Luminescence Spectrometer. 1: Simultaneous Recording of Total Luminescence and Phosphorescence

Vo Dinh Tuan and Urs P. Wild
Appl. Opt. 12(6) 1286-1292 (1973)

New Algae Mapping Technique by the Use of an Airborne Laser Fluorosensor

Hongsuk H. Kim
Appl. Opt. 12(7) 1454-1459 (1973)

The Use of Photomultiplier Tubes for Photon Counting

R. Foord, R. Jones, C. J. Oliver, and E. R. Pike
Appl. Opt. 8(10) 1975-1989 (1969)

Versatile Family of Modular Aurora and Airglow Photometers

Robert D. Sears
Appl. Opt. 12(6) 1349-1355 (1973)