Micro to Ultra-Micro

Ultra Micro Gas Turbines

Lessons Learnt from the Ultra-Micro Gas

The outcome of NEDO supported international research project led by University of Tokyo is reviewed, with respect to developing key technologies for ultra-micro gas turbines (UMGT). The study suggested ‘Finger-top’ gas turbines as a currently feasible extreme that install rotors of 8 mm in diameter with 1.2 million rpm to produce tens of watts net output. Prior to practicing such UMGT system in...

Ultra Wideband Radar for Micro Aerial Vehicles

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Accurate Coregistration between Ultra-High-Resolution Micro-SPECT and Circular Cone-Beam Micro-CT Scanners

Introduction. Spatially registering SPECT with CT makes it possible to anatomically localize SPECT tracers. In this study, an accurate method for the coregistration of ultra-high-resolution SPECT volumes and multiple cone-beam CT volumes is developed and validated, which does not require markers during animal scanning. Methods. Transferable animal beds were developed with an accurate mounting i...

Ultra-Sensitive biochemical Sensor based on Circular Bragg Micro-Cavities

We demonstrate an ultra-sensitive sensor realized in high quality circular semiconductor micro-cavities employing radial Bragg reflectors. Resolution enhancement by a factor of ten, compared to conventional ring resonators, is demonstrated experimentally. ©2005 Optical Society of America OCIS codes: 230.5750 Resonators; 280.3420 Laser sensors