受験番号：26IPE012

問１．
1.

An energy dispersion type X-ray detection apparatus that analyzes elements byemitting an electron beam, an X-ray, or the like on a sample and detecting acharacteristic X-ray generated from a surface of the sample, the energy dispersion type
X-ray detection apparatus comprising:an device holder that stores a semiconductor X-ray detecting device and isprovided with a female screw having a cylindrical shape; anda finger body that stores a substrate having an initial stage FET for amplifying
a signal from the semiconductor X-ray detecting device, includes a cooling mechanism,
and is provided with a male screw,
wherein the energy dispersion type X-ray detection apparatus is configured
such that the device holder and the finger body are tightened by the female screw andthe male screw to fix the semiconductor X-ray detecting device.
2.

The energy dispersion type X-ray detection apparatus according to Claim 1,
wherein the device holder that stores the semiconductor X-ray detecting device

is made of a metal material with a high coefficient of thermal expansion, whereas thefinger body that stores the substrate having the initial stage FET is made of a metalmaterial with a coefficient of thermal expansion that is smaller than the coefficient ofthermal expansion of the device holder.
3

The energy dispersion type X-ray detection apparatus according to Claim 1,
wherein the device holder is provided with an opening portion having a slit

shape such that a high voltage wiring for supplying a voltage to an electrode of thesemiconductor X-ray detecting device is capable of passing through the device holder.

問２．
As a conventional image compression system, the JPEG system standardized
by the ISO is representative. This system uses discrete cosine transform, in a casewhere a relatively large number of encoded bits is allocated, it is known to provide afavorable encoded image and a favorable decoded image. However, if the number of
encoded bits is reduced to a certain extent or more, block distortion becomes remarkable
and the deterioration is subjectively conspicuous.

On the other hand, research on a system in which an image is divided into aplurality of bands using a filter, which is called a filter bank, obtained by combining ahigh pass filter and a low pass filter and encoded for each of the bands is recently
becoming popular. In particular, a wavelet transform encoding is regarded as a newtechnology replaced to DCT because of not having disadvantage in which the block
distortion becomes remarkable by high compression as in DCT.
For example, a JPEG2000 that has completed International standardization inJanuary 2001 employs a system in which a high efficient entropy encoding is combinedwith this wavelet transform encoding, and obtains a large improvement of a coding
efficiency than that of the JPEG.

問３．
To be specific, the electronic paper device 26 is a conventional known
self-writing type device capable of displaying predetermined information as an image on
an image display unit in a state in which a voltage is applied, and holding the image ina no power supply condition. In a state in which no voltage is applied to each pixel
electrode configuring a matrix in the image display unit through a driver by themicrocomputer 23, negatively (-) charged white particles collect on a back surface side of
the image display unit, whereas positively (+) charged black particles remain on asurface side thereof. When the image display unit is viewed from the surface side, theimage display unit is in a state being colored in black. Subsequently, when the driver
operates on the basis of electronic data output from the microcomputer 23, inverts apolarity of the pixel electrode of a main portion of the matrix in accordance withinformation to be displayed as an image, a positional relationship between the whiteparticles and the black particles are appropriately exchanged, information by contrastof the white particles and black particles is displayed as an image on the image display
unit. Additionally, the electronic paper device 26 can hold an image displaying state as
it is even in the no power supply condition in which no voltage is applied to each pixel
electrode configuring the matrix in the image display unit through the driver.