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We have designed and fabricated a hard X-ray and gamma-ray TES spectrometer for nuclear materials analysis. A superconducting tin (Sn) absorber is coupled to the TES film by using a gold (Au) bump post to improve the thermal contact between the absorber and the TES. To obtain a sufficient detection efficiency at the high energy photons near 100 keV, an 8-pixel array of TES microcalorimeters were developed...
The continuous environmental radiation monitoring is very important after Fukushima accident especially for the evaluation of the decontamination. A portable gamma camera system is designed and fabricated with a compact digital front-end detector. A front-end detector consists of an 12 × 12 GAGG-APD (pixel size = 2 × 2 × 5 mm3) array combined with 144 channel Time over Threshold based ASIC. All the...
We report the Si wire AWG without systematic phase error generated at the curved waveguides. A 200GHz spacing 16 channel devices were fabricated by ArF immersion and EB lithography and the results are compared.
This paper reports on a micro force plate array for measurement of ground reaction forces of insect legs during running. The micro force plate is composed of a plate base and three beams whose surface and sidewall area are doped, which enable to detect both pressure and shear force. The device size and force resolution are 2000 μm × 500 μm × 20 μm (length × width × height) and 1 μN, respectively....
We propose a micro suction cup array for adhesion to both dry and wet surfaces. We measured the peel-off forces of a PDMS micro suction cup array, a PDMS flat-tip micro structure array and a flat PDMS pad from both wet and dry glass surfaces. When the glass surface was wet, the peel-off forces of a PDMS flat-tip micro pattern and a flat PDMS pad decreased by more than 1.7 times and 7.0 times, respectively...
PoGOLite is a balloon-borne X-ray polarimeter, designed to measure the polarization of 25-80 keV X-rays. It is scheduled for a pathfinder flight in August 2010. This paper outlines the scientific motivation and the status of preparations of the payload.
We have previously proposed the three-dimensional (3D) display system based on the reconstruction of parallax rays. In order to display real 3D object, applying image-based rendering technique, we have also proposed a camera system that captures light ray data needed for reconstructing natural 3D images by using parallax rays reconstruction method from multiple images captured from multiple viewpoints...
We have demonstrated improvement of the effective gain in the mobile communication environments by a phased array antenna. A DSP has controlled the phase shifters by a simple algorithm, and the field environments have been simulated by the fading emulator.
A 32-Mb SPin-transfer torque RAM (SPRAM) chip was demonstrated with an access time of 32 ns and a cell write-time of 40 ns at a supply voltage of 1.8 V. The chip was fabricated with 150-nm CMOS and a 100 × 200 nm tunnel magnetoresistive device element. This chip features three circuit technologies suitable for a large-scale array: 1) a two-transistor, one-resistor (2T1R) type memory cell for achieving...
We propose a flatbed-type three-dimensional (3D) display system for multiple users as an improved version of our previous thin natural 3D display based on the ray reconstruction method. This is a tool for communication around a 3D image among a small number of people. It is a flatbed-type autostereoscopic 3D display system. It consists of a flat panel display and an improved holographic lens array...
We have developed three-dimensional endoscopic system by Compound Eye. The system consists of micro lens array and an image sensor. As a micro lens array, we used GRIN lens array. It decreases a cross talk which lens-to-lens occurs on image sensor. This module uses a micro-lens array to form multiple images, which are captured on a photo-detector array. Digital processing of the captured multiple...
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