# US 2019/0317032 A1 · Radiation detection device

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- Number: US 2019/0317032 A1
- Document ID: US20190317032A1
- Status: Published application
- Kind: A1
- Application number: 16/468,731
- Filed: 2017-11-28
- Published: 2019-10-17
- Earliest claimed: 2016-12-15
- Assignees: Horiba, Ltd.
- Applicants: HORIBA, Ltd.
- Inventors: Hisashi AKIYAMA; Kusuo UENO; Takeshi AKAMATSU
- Web page: https://patentgrep.com/patent/US20190317032A1

## CPC

- G01N 23/223: by irradiating the sample with X-rays or gamma-rays and by measuring X-ray fluorescence
- G01N 23/2204: Specimen supports therefor; Sample conveying means therefore
- G01N 23/2252: Measuring emitted X-rays, e.g. electron probe microanalysis [EPMA]
- G01N 2223/076: X-ray fluorescence
- G01N 2223/079: incident electron beam and measuring excited X-rays
- G01N 2223/1016: X-ray
- G01N 2223/317: windows
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

The radiation detection device is equipped with a sample holding unit; an irradiation unit for irradiating a sample held on the sample holding unit with radiations; a detection unit for detecting the radiations generated from the sample; an illumination unit for irradiating the sample with light; an observation unit for observing the sample; and a light transmitting plate for allowing the light from the illumination unit, with which the sample held on the sample holding unit is irradiated, to be transmitted therethrough. The light transmitting plate is disposed at a position between the sample holding unit and the irradiation unit, and has an opening portion for allowing the radiations from the irradiation unit, with which the sample is irradiated, to pass therethrough and a scattering portion for scattering light.

## Claims

### Claim at position 1

1-7. (canceled)

### Claim at position 2

What is claimed is:

### Claim 8

A radiation detection device, comprising:
a sample holding unit;
an irradiation unit for irradiating a sample held on the sample holding unit with radiations;
a detection unit for detecting the radiations generated from the sample;
an illumination unit for irradiating the sample with light;
an observation unit for observing the sample; and
a light transmitting plate for allowing the light from the illumination unit, with which the sample held on the sample holding unit is irradiated, to be transmitted therethrough, wherein
the light transmitting plate is disposed at a position between the sample holding unit and the irradiation unit, and
the light transmitting plate includes:
an opening portion for allowing the radiations from the irradiation unit, with which the sample is irradiated, to pass therethrough; and
a scattering portion for scattering light.

### Claim 9 (depends on 8)

The radiation detection device according to claim 8, wherein
the sample holding unit, the illumination unit and the light transmitting plate are disposed so that the light from the illumination unit does not pass through the opening portion.

### Claim 10 (depends on 8)

The radiation detection device according to claim 8, wherein
the illumination unit is disposed with respect to the light transmitting plate so that the sample held on the sample holding unit at a position away from the light transmitting plate by a predetermined distance or more is positioned outside an imaginary cone that is formed by the extension lines of the lines connecting the center of the light emitting portion of the illumination unit to the edges of the opening portion.

### Claim 11 (depends on 8)

The radiation detection device according to claim 8, wherein
the edges of the opening portion do not scatter light.

### Claim 12 (depends on 8)

The radiation detection device according to claim 8, wherein
the portion of the light transmitting plate through which light is allowed to be transmitted is sand blasted.

### Claim 13 (depends on 8)

The radiation detection device according to claim 8, further comprising
a changing unit for changing the distance between the sample holding unit and the light transmitting plate.

### Claim 14 (depends on 8)

The radiation detection device according to claim 8, further comprising
a vacuum chamber, wherein
at least part of each of the irradiation unit, the detection unit and the illumination unit is disposed inside the vacuum chamber,
the light transmitting plate is part of the wall of the vacuum chamber, and
the sample holding unit is disposed outside the vacuum chamber.