受験番号：26IPE008

問１．
[Claim 1]
An energy dispersive X-ray detection apparatus for performing elemental
analysis by irradiating a sample with an electron beam or an X-ray and detecting acharacteristic X-ray generated from a surface of the sample,
the energy dispersive X-ray detection apparatus comprising:a device holder that accommodates a semiconductor X-ray detection device andhas a female screw formed in a cylindrical shape; anda finger main body that accommodates a circuit board having an initial-stage
FET for amplifying a signal from the semiconductor X-ray detection device, includes acooling mechanism, and has a male screw,
wherein the semiconductor X-ray detection device is fixed by fastening thedevice holder and the finger main body with the female screw and the male screw.
[Claim 2]
The energy dispersive X-ray detection apparatus according to claim 1, wherein
the device holder that accommodates the semiconductor X-ray detection device
is made of a metal material having a higher thermal expansion coefficient, andthe finger main body that accommodates the circuit board having the initial
FET is made of a metal material lower in thermal expansion coefficient than the metalmaterial for the device holder.
[Claim 3]
The energy dispersive X-ray detection apparatus according to claim 1, wherein
the device holder has a slit-shaped opening through which high-voltage wiring
for supplying a voltage to an electrode of the semiconductor X-ray detection device isinstalled in the device holder.
問２．
A typical one of conventional image compression methods is JPEG
standardized by ISO. It has been known that JPEG provides favorable coded images
and decoded images using discrete cosine transform in cases where a relatively larger
coding bit rate is allocated. However, if the coding bit rate is reduced more than acertain degree, block distortion appears conspicuously, so that degradation becomesremarkable subjectively.
In recent years, on the other hand, studies have been actively conducted onmethods of dividing an image into a plurality of bands using a filter bank being a
combination of a high-pass filter with a low-pass filter, and performing coding for eachband.

Among the methods, wavelet transform-based coding has no drawback ofconspicuous block distortion by high compression like DCT, and is therefore expected asa new technique being an alternative to DCT.
For example, JPEG 2000 approved in January 2001 as an international
standard adopts a combined method of highly efficient entropy coding with wavelet
transform, and achieves significant improvement in coding efficiency as compared withJPEG.
問３．
Specifically, the electronic paper device 26 is of a conventionally known
self-programming type. That is, the electronic paper device 26 is capable of displaying
an image of predetermined information on the image display part in a voltage appliedstate and holding the display of the image in a no-power supply state. In a state inwhich the microcomputer 23 applies no voltage via the driver to the respective pixel
electrodes constituting the matrix on the image display part, white particles charged
negatively (-) are retained on the back side of the image display part, whereas black
particles charged positively (+) remain at the front side of the image display part. The
image display part is thus colored black when being viewed from the front side. Whenthe driver operates based on electronic data output from the microcomputer 23 toreverse the polarities of the pixel electrodes on a required portion of the matrix inaccordance with information to be displayed in the form of an image, the positional
relationship between the white particles and the black particles is switchedappropriately, so that the image of the information is displayed on the image display
part by the contrast between the white particles and the black particles. Also in the
no-power supply state in which no voltage is applied via the driver to the respective
pixel electrodes constituting the matrix on the image display part, the electronic paper
device 26 is capable of holding the image display state as it is.