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Optical topography (OT) based on near infrared spectroscopy (NIRS) is useful for measuring changes in the concentrations of oxygenated hemoglobin (oxy-Hb) and deoxygenated hemoglobin (deoxy-Hb) in brain tissues non-invasively. Conventional OT systems limit subjects' ranges of movement to within the length of optical fibers these systems require for irradiating light on the scalp and detecting light...
We have developed a brain-machine interface (BMI) by using a method based on near-infrared spectroscopy. We call our interface ldquoOptical-BMIrdquo. It functions as a practical, unrestrictive, non-invasive brain-switch without the need for large equipment. During an experiment with the prototype system, an operator manipulated external electrically controlled equipment while we measured the corresponding...
Optical topography (OT) based on near infrared spectroscopy (NIRS) is suitable for measuring changes in the concentrations of oxygenated hemoglobin (oxy-Hb) and deoxygenated hemoglobin (deoxy-Hb) in tissue in the brain. It can be used to investigate brain functions of subjects of all ages because it is non-invasive and less constraining on subjects. Conventional OT systems require optical fibers to...
Hollow optical fiber probes are used for remote Raman and infrared spectroscopy. Preliminary experiments using these probes are performed, and the results of the experiments show that the hollow fiber probes are useful for endoscopic measurement of Raman and infrared spectroscopy. As regards to Raman spectroscopy, a hollow fiber probe with a ball lens at the end works as a confocal system. It can,...
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