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h1 title img:National Metrology Institute of Japan

Development, dissemination, and use promotion of measurement standards and development of standards-related measurement technologies

As the national metrology institute (NMI), we are focusing on the development and dissemination of measurement standards, promotion of measurement standards utilization, development of measurement technologies related to measurement standards, legal metrology work and training of experts. Our activity covers engineering, physical, material, and chemical measurement standards. It also covers development of measurement and analytical instrumentation. We also coordinate international activities on metrology standards as a national representative.

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New Research Results

Development of LED-Based Standard Light Source that Emits Light in All Directions

Researchers in AIST developed a prototype of a new omnidirectional standard LED in collaboration with Nichia Corporation. This is a new standard light source using LEDs that emits light covering the full visible wavelength range over all directions.
The developed omnidirectional standard LED achieves stability and reproducibility of optical power comparable to the conventional standard lamp and has a spectrum covering the full visible wavelength range. Furthermore, combination with a special optical material that diffuses light uniformly in all directions successfully realized spatial light distribution that is ideal as a standard light source for total luminous flux measurement. The commercialization of the standard LED is expected to contribute to the sustainable development of lighting industry and to improve the accuracy of light source evaluation in manufacturers, etc.

Newly developed radiation dosimeter image 1

From standard lamp with 100-year history to standard LED

IoT-compatible Radiation Dosimeter for real-time and on-site monitoring

Researchers at AIST has been developed a compact radiation dosimeter using power-saving wireless technology. It does not require battery replacement for two years or more. The newly developed dosimeter combines the low power consumption technology developed by AIST at the time in response to the Fukushima Daiichi Nuclear Power Plant Accident with the latest IoT (Internet of Things) technology. This enables to check the radiation dose transition over time directly on the dosimeter unit display or an information terminal such as a smartphone, with almost no concern about battery drain.

Newly developed radiation dosimeter image 2

Newly developed radiation dosimeter

Research Unit

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