受験番号：26IPE005

問１．
Claim 1
An energy dispersive X-ray detector that irradiates a sample with an electron
beam, an x-ray, or the like, detects a characteristic X-ray generated from a surface of thesample, and conducts elemental analysis, the energy dispersive X-ray detector
comprising:a female threaded cylindrical element holder that stores a semiconductor x-ray
detection element; anda male threaded finger body that stores a substrate including a first-stage FET
for amplifying a signal from the semiconductor x-ray detection element, the finger body
including a cooling mechanism,
wherein the element holder and the finger body are fastened to each other via
the female thread and the male thread such that the semiconductor x-ray detection
element is fixed.
Claim 2The energy dispersive X-ray detector according to claim 1, wherein
the element holder that stores the semiconductor x-ray detection element ismade of metal material with a large coefficient of thermal expansion, andthe finger body that stores the substrate including the first-stage FET is,
however, made of metal material with a smaller coefficient of thermal expansion thanthe element holder.
Claim 3The energy dispersive X-ray detector according to claim 1, wherein
the element holder has a slit-like opening that allows high-voltage wiring topass through the element holder, the high-voltage wiring supplying voltage to anelectrode of the semiconductor x-ray detection element.
問２．
Examples of conventional typical image compression methods include JPEG
that is standardized by the ISO. JPEG is known as a method that uses a discretecosine transform and provides good coded images and decoded images when a relatively
large number of encoding bits are allocated. However, when decreasing the number ofencoding bits to some extent or less, block boundary artefacts clearly appear anddeterioration subjectively seems to be show up.
On the other hand, in recent years, methods that use a so-called filter bankincluding high-pass filters and low-pass filters to divide an image into a plurality ofbands and conduct encoding for each of the bands have been actively researched.
Among such methods, encoding using wavelet transform is considered as leading one of
new technologies that serve as alternatives to the DCT, since the encoding using
wavelet transform does not have the disadvantage of showing distinct block boundary
artefacts due to high compression, unlike the DCT.
For example, JPEG 200 that is internationally standardized in January, 2001
adopts a combination of the wavelet transform and high-efficiency entropy coding.
This enables larger improvement in coding efficiency than JPEG.
問３．
Specifically, the electronic paper device 26 is a conventionally-known
self-writing type electronic paper device capable of displaying an image ofpredetermined information on an image display unit while voltage is applied, andkeeping displaying the image while electric power is not supplied. In a state where thevoltage is not applied, under the control of the microcontroller 23, via the driver to pixel
electrodes forming a matrix in the image display unit, negatively (-) charged whiteparticles are accumulated on the back side of the image display unit, and positively (+)
charged black particles remain on the front side of the image display unit. When theimage display unit is seen from the front side, the image display unit seems to bepainted black. Subsequently, when the driver operates on the basis of electronic data
output from the microcontroller 23 to invert the polarities of the pixel electrodes in anecessary part of the matrix in accordance with information to be displayed as an image,the positional relation between the while particles and the black particles are switchedappropriately.

Therefore, the image of the information is displayed on the image

display unit by using contrast between the white particles and the black particles. In
addition, the electronic paper device 26 is capable of keeping displaying the image evenwhile electric power is not supplied, in other words, while the voltage is not applied via
the driver to the pixel electrodes forming the matrix in the image display unit.