26 October 1994 In-situ spectral absorption profiler using optical fibers
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Proceedings Volume 2258, Ocean Optics XII; (1994) https://doi.org/10.1117/12.190112
Event: Ocean Optics XII, 1994, Bergen, Norway
Abstract
Phytoplankton spectral absorption of light energy is one of the important factors to estimate primary production of the ocean. We have developed a system which measures in situ spectral absorption of suspended matter, mainly phytoplankton, by a modified opal glass technique. The system was designed to provide sub meter-scale profile of phytoplankton distribution without water sampling. The system consists of a halogen lamp as a white light source, a multi-channel spectrometer and submergible optical sensor unit. The collimating lens and diffuser constitute this unit. The optical fiber cables are employed to transmit the light between the sensor unit and the equipment on shipboard. The received light was measured by spectrometer which ranges from 400 nm to 800 nm with 1024-channel temperature stabilized linear photodiode array. Our preliminary experiment with the cultured phytoplankton (diatoms, flagellate and green algae) has shown that minimum detectable absorption coefficient is 0.01 m-1.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Toshiyuki Saito, Toshiyuki Saito, Akio Nishimoto, Akio Nishimoto, Yoshimi Kakui, Yoshimi Kakui, M. Nanjo, M. Nanjo, Ryohei Tsuda, Ryohei Tsuda, } "In-situ spectral absorption profiler using optical fibers", Proc. SPIE 2258, Ocean Optics XII, (26 October 1994); doi: 10.1117/12.190112; https://doi.org/10.1117/12.190112
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