Development of digital holographic imaging system for the study of abundance of zooplankton

2014 Fiscal Year Final Research Report

• Project/Area Number: 24658177
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: General fisheries
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: AKIBA Tatsuro 独立行政法人産業技術総合研究所, バイオメディカル研究部門, 主任研究員 (00221713)
• Co-Investigator(Kenkyū-buntansha): TANAKA Yuji 東京海洋大学, 海洋科学技術研究科, 教授 (90207150)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: プランクトン / ホログラフィー / 動物プランクトン / 採水技術 / 沿岸生態系

Outline of Final Research Achievements

Digital holographic imaging system was developed for the study of zooplankton distribution. As a light source, infrared semiconductor laser was employed and laser light was spatially filtered by a single mode fiber. Compared to the conventional filtering method, this is very stable under vibrating condition like in the ocean. The volume of observation is 25　cc and resolution of image is 10 micrometers. The instruments can be submerged up to 100 m. The imaging system is controlled by a timer that allows us to acquire image intermittently. The system can be operated during certain time as programmed.
Sampling gear for the study of vertical profile of the water column was developed. This gear is really innovative. This is very unique apparatus that can sample water along the water column. With this gear vertical profile of the environment can be known.
We can study variation and distribution of zooplankton with higher resolution than ever with our developed technologies.

Free Research Field

海洋計測学