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Proceedings Paper

A Simple Hemispherical, Logarithmic Light Sensor
Author(s): J. Aiken; I. Bellan
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Paper Abstract

A hemispherical (27) light sensor is described, which is of simple mechanical construction and manufactured from Teflon. The logarithmic amplifier uses only 2 devices yet gives 6 or 8 orders of magnitude of linearity of light detection when used with common silicon photodiode detectors. The reduction of calibration uncertainties and the long term stability of calibration are discussed. Measurements of photosynthetically active radiation (400-700 nm) and narrow band radiation in the visible spectral region are presented for sensor measurements made over the side of a stationary research vessel and attached to the Undulating Oceanographic Recorder for various deployments in the western English Channel in the summer of 1984.

Paper Details

Date Published: 7 August 1986
PDF: 6 pages
Proc. SPIE 0637, Ocean Optics VIII, (7 August 1986); doi: 10.1117/12.964235
Show Author Affiliations
J. Aiken, Natural Environment Research Council (England)
I. Bellan, Natural Environment Research Council (United States)

Published in SPIE Proceedings Vol. 0637:
Ocean Optics VIII
Marvin A. Blizard, Editor(s)

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