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Organization & Research Areas

Health & Environmental-Sensing Device Project

High-speed wavelength swept light source for OCT

Optical coherence tomography (OCT) is one of the most promising diagnostic imaging technologies because of its capability for high-resolution imaging. OCT using a wavelength-swept light source is attracting much attention in the fields of medicine , cosmetics, and industry because of its high imaging rates. In this project, we are developing a new light source that incorporates an electro-optic deflector, which we plan to employ in a high-speed SS-OCT system. By applying the high-speed and flexible deflection characteristics of KTN crystal, our light source is expected to be a useful tool for OCT.

Figure of High-speed wavelength swept light source for OCT


hitoe® (Shirt-type wearable sensor)

hitoe® is a wearable sensing fabric, co-developed by Toray and NTT. Our wearable biomedical sensing system uses the fabric as a bio-electrode that enables wearers to monitor their own vital information unobtrusively for extended periods of time. The use of hitoe® is expanding into areas such as sports training, monitoring of workers in extreme environments, healthcare utilizing daily life logs, and medical support for heart problems and rehabilitation. We aim to contribute to realizing a safe and healthy society with hitoe®.

Figure of hitoe®


Stable isotope ratio analysis by using laser gas sensing technology

NTT Device Innovation Center has developed a technology that estimates the quality and geographical origin of foods or beverages by analyzing the stable isotope ratios of hydrogen, oxygen, and carbon contained in them. A laser-based stable isotope analyzer heats up or burns a small sample of a food product and thus converts the hydrogen, oxygen, and carbon contained in the material into water vapor and carbon dioxide gas. By measuring molecular absorption of these gases using high-performance laser sources developed by NTT Laboratories, we are able to analyze stable isotope ratios with a very high degree of precision. The laser-based analyzer is compact and easy to operate. In addition, it can reduce the measurement time dramatically compared to isotope ratio mass spectrometry, which is currently the most widely used method for stable isotope ratio analysis. We have verified the potential of the geographic origin estimation of several foods and demonstrated the effectiveness of this technology in a food distribution system. We are going to accumulate and improve stable isotope ratio data of a variety of foods, and we aim to develop geographic origin estimation systems with better performance, which will be useful for food supply chain systems in the future.

Figure of Stable isotope ratio analysis



IoT-Gate readily connects sensors to the network with various communications standards/formats such as Bluetooth, Wi-Fi, and 920 MHz. The developed wireless engine enables downsizing and low-power consumption of IoT-Gate, making it suitable for outdoor and wearable applications. This sensor connectivity enhancement technology accelerates service development in IoT-related fields.

Figure of IoT-Gate


Buru-navi® (Novel haptics device)

The novel force display device, Buru-Navi, is now smartly packaged into small wirelessly controlled appliances: a simple type wearable on the wrist, a handlebar type, and a monolithically integrated all-in-one type. These force display devices are expected to be widely used in virtual reality games and pedestrian navigation systems.

picture of Buru-navi®

Smartphone size prototype of “buru-navi” for pedestrian navigation.


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