A simple and inexpensive 4π light collector and two designs for a light meter for light attenuation studies |
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| Authors: | P. J. le B. WILLIAMS N. W. JENKINSON |
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| Affiliation: | Department of Oceanography, University of Southampton, England |
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| Abstract: | SUMMARY. A simple 4π light collector is described suitable for light attenuation studies. It uses table tennis balls as light collectors and its spherical response is near to ideal. A circuit for a simple meter based on an operational amplifier is given as well as that for a direct-reading log-ratio meter. Both circuits are intended for use with selenium photocells. The cost of the materials for detector and simple meter is less than £30. |
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