JP2001318150A - Optical storage type radiation measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical storage type radiation measuring instrument which can be increased in S/N and made free of deterioration in precision depending upon temporal switching, etc. SOLUTION: This instrument is equipped with a radiation sensitive part 9 having a pigment containing body 1 made of a solid body or liquid containing organic pigment having colored or discolored with ionizing radiation and an external light protection part 2 which cuts off external disturbing light to the pigment containing body, a light irradiation part 4 which irradiates the radiation sense part with measuring probe light, and a light measurement part 5 which measures the intensity or wavelength of its transmitted or reflected light.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation measuring device, and more particularly to an optical storage type radiation measuring device.

[0002]

2. Description of the Related Art A stimulable luminescent material has been well known as a substance that optically accumulates information such as radiation intensity and irradiation dose. In this method, for example, it is processed into a thin film sheet, and when it is used, it is first brought into close contact with the surface of the object to be measured, then removed, and the intensity distribution of the radiation is read out by a readout device. It has been widely used mainly in the medical field as an alternative to X-ray film.

In the field related to nuclear power, activities for actively utilizing the stimulable luminescent material for detecting radiation have been actively carried out in recent years, and various research and development have been carried out.

FIG. 11 shows an example of this.
An optical storage-type radiation measurement device for reading data online has been reported as a sensor system (Source: JAERI-Conf)
98-011, Hiroshi Kitaguchi, Shigeru Dekai).

That is, as shown in FIG. 11, this optical storage type radiation measuring apparatus comprises a stimulable luminous body 13, an excitation light source 16 for irradiating the stimulable luminous body 13, a stimulable luminous body, A stimulable luminescence detecting unit 17 for detecting weak light emitted from the body 13 is provided. The excitation light and the stimulating light are transmitted by an optical fiber 14. To switch a sensor head composed of a combination of a plurality of stimulating luminous bodies 13 and an optical fiber 14, an optical fiber 1 is used.
4 is provided with a scanner 15. The scanner 15 uses a galvanomirror or the like. Further, the optical fiber 1 of the excitation light source 16 and the photostimulable
A common optical splitter or the like is used for the splitting of No. 4.

[0006] In the optical storage type radiation measuring apparatus configured as described above, first, radiation is incident on the stimulable luminous body and a temporary excitation phenomenon occurs. At this time, no prompt light emission occurs. When the light from the excitation light source 16 is irradiated through the scanner 15 and the optical fiber 14, the temporary excitation phenomenon of the photostimulable luminous body is alleviated, and the light is emitted in the process of returning to the original state. This light is transmitted to the photostimulated detector 17 via the optical fiber 14 and the scanner 15 and detected. The excitation light irradiation for reading and the erasing are performed at the same time, and the preparation for the next reading and measurement is completed.

[0007]

In the above-mentioned conventional optical storage type radiation measuring apparatus, since light is emitted immediately after the irradiation of the excitation light, it is necessary to ensure the read data accuracy which is not affected by the light emission attenuation characteristics. In this case, the reproducibility of the switching time between irradiation and reading was important.

Further, since the emitted light itself is weak light, there is a problem of S / N itself, and it has been difficult to secure the reading accuracy itself.

Further, when the switching operation is performed together with the irradiation, even if the irradiation light slightly leaks to the reading side, the S / N of the originally weak signal is further deteriorated, so that such leakage or interference does not occur. In addition, additional measures such as a temporal filter and an optical filter were required.

Furthermore, it is difficult to confirm that complete information has been obtained, and there is a problem that an offset component such as latent afterglow is sequentially added as irradiation and readout are repeated.

The present invention has been made in view of such a conventional situation, and has been developed in the field of optical storage type radiation measurement.
It is an object of the present invention to provide an optical storage type radiation measuring apparatus that can improve the accuracy and eliminate the deterioration of accuracy depending on time switching or the like.

[0012]

The dyes commonly used in the present invention are called functional dyes, and change in color information such as a coloring reaction and a change in hue is caused by the incidence of ultraviolet rays or radiation. The radiation dose and the change in color information are calibrated in advance while preventing the incidence of ultraviolet rays. At the time of normal use, color information is read out optically, and a corresponding irradiation dose is identified.

Among these functional dyes, there are an irreversible reaction type in which only one-way chemical reaction such as coloring proceeds, and a reversible reaction type in which a reverse reaction is caused by light stimulation or the like.

Examples of the former include fluoran-based substances partially substituted by specific molecules, and the latter include benzodixanthene endoperoxide and the like (Nakasumi, et al .; Atomic Energy Society of Japan, Fall 1999). Tournament B1
8. Tokita, Nagahama, Watanabe; The 76th Annual Meeting of the Chemical Society of Japan, 1G3
13, Tokita, Nagahama, Watanabe; 3rd International Symposium on Organic Photochromism, P72, S.M. Tokita, et
al. Molecular and Liquid;
Crystal, in press 2000).

The present invention provides an optical storage type radiation measuring apparatus for performing radiation measurement using a functional dye which exhibits a reaction such as coloring upon incidence of such radiation.

That is, according to the first aspect of the present invention, a dye-containing substance made of a solid or a liquid containing an organic dye that causes a coloring or discoloration reaction by ionizing radiation and the incidence of external disturbance light to the dye-containing substance are blocked. A radiation sensitive part having a disturbance light protection part, a light irradiating part for irradiating the radiation sensitive part with measurement probe light, and a light measuring part for measuring the intensity or wavelength of the transmitted light or reflected light. An optical storage type radiation measuring apparatus is provided.

According to the second aspect of the present invention, there is provided a dye-containing substance comprising a solid or liquid containing an organic dye which causes a coloring or discoloration reaction by ionizing radiation, and a disturbance for blocking external light from entering the dye-containing substance. A radiation sensitive part having a light protection part, a light irradiating part for irradiating the radiation sensitive part with measurement probe light, a light measuring part for measuring the intensity or wavelength of transmitted light or reflected light, and the radiation sensitive part An optical storage type radiation measuring apparatus, comprising: a light erasing unit for erasing information stored in the unit.

In the present invention, the dye-containing substance is sealed in an optically transparent cell as a liquid dissolved in a solvent,
It is configured as a means for solidifying in a resin, or a means for encapsulating in a microcapsule to form a sheet.

When a functional dye is used as the radiation-sensitive part, accumulated radiation dose information is accumulated in the same manner as in the conventional stimulable luminescent material. However, in the conventional example, to measure a weak luminescence called stimulable luminescence,
In the present invention, a probe light having a necessary and sufficient intensity is irradiated and its absorbance or transmittance, transmission / absorption spectrum, and the like need only be measured, which is far more advantageous in terms of S / N.

Further, unlike the case of reading out the stimulable luminous body, there is no need to perform time sharing between the probe light and the light detection. In addition, when a reversible functional dye is used, information accumulated using light having the same wavelength as that of the reading light or light having a different wavelength can be erased and initialized, and can be used repeatedly.

Based on the above points, in the invention of claim 3,
The optical storage type radiation measuring apparatus according to claim 1, wherein the light irradiation unit, a part of light of the light measurement unit and the light erasing unit,
Alternatively, an optical storage type radiation measurement device using an optical fiber as a transmission medium for all light is provided.

According to a fourth aspect of the present invention, there is provided an optical storage type radiation measuring apparatus in which the components of the optical storage type radiation measuring apparatus according to the first or second aspect are enclosed in a package of an integrated circuit.

According to a fifth aspect of the present invention, in the optical storage type radiation measuring apparatus according to the first or second aspect, the optical information stored in the radiation sensitive section is read out every certain time,
Provided is an optical storage type radiation measuring apparatus including means for obtaining time differential information of a radiation amount by referring to a previous read value and an elapsed time.

According to a sixth aspect of the present invention, in the optical storage type radiation measuring apparatus according to the second aspect, the optical information stored in the radiation sensitive section is read out every certain time, and the optical erasing section is operated immediately after the reading. An optical storage type radiation measuring apparatus characterized by comprising means for obtaining time differential information of the amount of radiation by referring to the elapsed time from the previous reading.

According to a seventh aspect of the present invention, in the optical storage type radiation measuring apparatus according to the second aspect, the optical information stored in the radiation sensitive section is read out every certain time, and the optical erasing section is operated immediately after the reading. The present invention provides an optical storage type radiation measuring apparatus including means for obtaining time differential information of the amount of radiation by referring to a previous read value and an elapsed time.

According to an eighth aspect of the present invention, in the optical storage type radiation measuring apparatus according to the first or second aspect, the optical information stored in the radiation sensitive section is read out every certain time,
Provided is an optical storage type radiation detector including a means for obtaining time integration information of a radiation amount.

According to a ninth aspect of the present invention, both of the information reading means of the eighth and fifth aspects or the eighth and sixth aspects are provided so that it is possible to simultaneously obtain both the differential information and the integral information. Provided is an optical storage-type radiation measuring device.

According to a tenth aspect of the present invention, in the optical storage type radiation measuring apparatus according to any one of the first to ninth aspects, a plurality of radiation sensitive parts having different sensitivities to radiation are connected to each other to form one radiation sensitive part. Provided is an optical storage type radiation measuring apparatus which is made to function.

According to the eleventh aspect of the present invention, the first to tenth aspects
The optical storage type radiation measuring apparatus according to any one of the above, further comprising means for compensating for a change or fluctuation in light intensity based on performance deterioration or aging of the optical components and the light source, etc. Provided is an optical storage type radiation measurement device, which is means for returning light from an irradiation unit to a light measurement unit.

As described above, according to the present invention, the S / N can be increased by using the probe light instead of the spontaneous light emission, and the temporal switching between the irradiation and the reading can be made unnecessary.

[0031]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an optical storage type radiation measuring apparatus according to an embodiment of the present invention.

First Embodiment (FIG. 1) FIG. 1 is an explanatory view showing a first embodiment of the present invention.

In the present embodiment, a solid or liquid (hereinafter, referred to as “dye-containing substance”) 1 containing a functional dye that causes a coloring reaction by ionizing radiation is used. The pigment-containing material 1 is covered with a disturbance light protection unit 2 so as to prevent external light stimulation, and has a structure to receive only light emitted from the light irradiation unit 4 via the optical transmission medium 6. ing. A reflector 3 for reflecting received light is provided on the surface of the dye-containing material 1 opposite to the optical transmission medium 6. Hereinafter, the whole of these will be referred to as “radiation sensitive unit 9”.

The optical measuring unit 5 is connected to the optical transmission medium 6 via an optical branching / combining device 7. The optical transmission medium 6 branched at the optical branching / joining section 7 has a light irradiation section 4
The light erasing unit 8 is connected to the light source. In the present embodiment, the light erasing unit 8 is not used.

In such a configuration, light that has entered the radiation sensitive section 9 via the optical transmission medium 6 is reflected by the reflector 3 and exits the optical transmission medium 6 again. The reflected light passes from the optical transmission medium 6 through the optical branching / joining device 7 and is detected and measured by the optical measuring unit 5.

The light branching / combining unit 7 combines the outgoing path from the light irradiating unit 4 and the return path to the light measuring unit 5, and
It has a function of optically connecting to an optical transmission medium 6 that connects between the optical transmission medium 6 and the radiation sensitive section 9. As the optical branching / combining device 7, a device generally called an optical coupler or the like can be used. In addition, a special optical transmission medium is not required, and light may be emitted and emitted by spatial transmission in air or the like.

The light measuring section 5 measures the spectrum of the measured light, or the power of the light when the wavelength is limited, and acquires the radiation dose (rate) from the calibration information acquired in advance. can do.

According to the present embodiment having such a configuration, since light of arbitrary intensity is irradiated and the transmission and reflection states of the light are measured, it is higher than a conventional method using a stimulable luminous body or the like. Measurement with S / N can be performed.

Second Embodiment (FIG. 2) FIG. 2 is an explanatory view showing a second embodiment of the present invention.

In the first embodiment, the light incident on the radiation sensitive portion 9 is reflected by the reflector 3 and returns on the incident path. However, in the present embodiment, as shown in FIG. Measure the transmitted light.

That is, also in the present embodiment, the dye-containing material 1 composed of a solid or a liquid containing a functional dye that causes a coloring reaction by ionizing radiation is used. It is covered by a disturbance light protection unit 2 so as not to enter. Thus, a radiation responsive unit 9 that receives only light emitted from the light irradiation unit 4 via the optical transmission medium 6 is configured.

In such a configuration, as shown in FIG. 2, a reflector is not provided on the dye-containing material 1, and the optical transmission medium 6 is connected to both sides of the dye-containing material 1. And
The light irradiating section 4 and the light irradiating section 8 are connected to one optical transmission medium 6 (6a) connected to one end of the radiation sensitive section 9, and the light irradiating section 4 is connected to the other optical transmitting medium 6 (6b). And the light erasing unit 8 are connected. The light erasing unit 8 is not used in this embodiment.

In this embodiment, when light enters the radiation sensitive section from the light irradiating section 4 via one of the optical transmission media 6a,
The light transmits through the dye-containing material 1 covered with the disturbance light protection unit 2, and the other light transmission medium 6b disposed on the right side of FIG.
To the light measuring unit 5 via

According to the present embodiment, as in the first embodiment, a conventional method using a photostimulable luminescent material or the like is used to measure the transmission and reflection states of light by irradiating light of an arbitrary intensity. Measurement with a higher S / N can be performed.

Third Embodiment (FIG. 3) FIG. 3 is an explanatory view showing a third embodiment of the present invention.

In this embodiment, the reflector 3 is provided as in the first embodiment, but the optical transmission medium 6 has a non-branched structure.

That is, also in the present embodiment, the dye-containing material 1 made of a solid or a liquid containing a functional dye that causes a coloring reaction by ionizing radiation is used. It is covered by the disturbance light protection unit 2 so as not to enter, and has a structure to receive only light emitted from the light irradiation unit 4 via the optical transmission medium 6. A reflector 3 for reflecting received light is provided on the surface of the dye-containing material 1 opposite to the optical transmission medium 6.

The reflector 3 has a configuration using a corner cube or the like, and the forward path and the return path of the optical transmission medium 6 are made different by using the reflector 3. The optical transmission medium 6 is connected to the light irradiating section 4 and the optical erasing section 8.

In this embodiment having such a configuration,
The following actions are performed.

That is, in the first embodiment, the light reflected by the reflector 3 of the radiation sensitive section is returned along the same path as the incident path, but in the present embodiment, a corner cube or the like is used. The use of the reflector 3 makes it possible to make the forward path and the return path of the optical transmission medium 6 different from each other, thereby eliminating the need for a branching junction. According to the configuration of the present embodiment, a special optical transmission medium is not required, and light may be transmitted and received by spatial transmission in air or the like.

The light erasing section 8 can function effectively in this embodiment. That is, when a functional dye exhibiting a reversible reaction is used, information accumulated by light from the light erasing section 8 can be erased and initialized by a reverse reaction. However, since some dyes can be erased with light having the same wavelength as the light irradiating section 4 for reading, it is not always necessary to provide the light erasing section 8 independently.

In the first to third embodiments, an optical fiber can be applied to a part or all of the optical transmission medium 6. In the first and second embodiments described above, air,
Although space can be used, in this case, it is necessary to install each optical component on an optical surface plate or the like in order to ensure the mutual positional relationship of the optical components. On the other hand, by using an optical fiber as the optical transmission medium 6, flexibility is provided in the arrangement of individual components, and it is possible to construct a system or the like that performs measurement by arranging only the radiation sensitive section 9 at a remote location. It will be easier.

Fourth Embodiment (FIG. 4) FIG. 4 is an explanatory view showing a fourth embodiment of the present invention.

In this embodiment, the components of the optical storage type radiation measuring apparatus are enclosed in an integrated circuit package.

That is, as shown in FIG. 4, the light irradiating section 4, the dye-containing substance 1, and the light measuring section 5 are embedded in the IC package 10. That is, the IC package itself serves as the disturbance light protection unit 2. An LED or the like is formed as a light source, and a Si photodetector or the like is formed inside an IC package as a light measuring unit, so that a single IC including an amplifier circuit is formed.

Other configurations are described in the first to third embodiments.
This is substantially the same as the embodiment.

According to this embodiment having such a configuration, it can be mounted on various circuit boards, and can be used as an indicator of the life of the circuit itself due to irradiation with radiation. In addition, by adopting such a mode, it is possible to reduce costs by mass production.

Fifth Embodiment (FIG. 5) FIG. 5 is an explanatory view showing a fifth embodiment of the present invention.

The present embodiment is provided with a means for reading out optical information stored in the radiation sensitive section every certain time and obtaining time differential information of the amount of radiation by referring to the last read value and the elapsed time. It is a thing.

That is, FIG. 5 shows the time change of the density of the color accumulated in the functional dye, that is, the absorbance in a certain fluctuating dose field, and the reading value of ΔV during a certain time interval ΔT. Indicates that a change has occurred.

As shown in FIG. 5, assuming that a value obtained by converting ΔV into a dose is ΔD, ΔD / ΔT can be obtained as information on an average dose rate value in the time section. Therefore, by reading out the differential information of the accumulated information, it is possible to perform remote continuous monitoring of functional dyes of both reversible and irreversible types by utilizing their respective characteristics.

Sixth Embodiment (FIG. 6) FIG. 6 is an explanatory view showing a sixth embodiment of the present invention.

In the present embodiment, the optical information stored in the radiation sensitive section is read out at certain time intervals, the optical erasing section is activated immediately after reading out, and the radiation time is referred to by referring to the elapsed time from the previous reading. To obtain the time differential information of the quantity.

That is, as shown in FIG. 6, in a certain fluctuating dose field, the density of coloring accumulated in the functional dye,
That is, it is a diagram showing a time change of the absorbance. At a certain time, at the same time as or immediately after reading, optical erasing is performed to initialize information.

After a lapse of ΔT from this point,
When reading is performed again, it is found that the read value has increased by ΔV. After this reading, the stored information is initialized as in the previous reading. Assuming that a value obtained by converting ΔV into a dose is ΔD, ΔD / ΔT can be obtained as information on the average dose rate value in the time section.

Therefore, according to the present embodiment, since the stored information is initialized each time the data is read, the information can be repeatedly used without saturation.

Seventh Embodiment (FIG. 7) FIG. 7 is an explanatory view showing a seventh embodiment of the present invention.

In the present embodiment, the optical information stored in the radiation sensitive section is read out at certain time intervals, the optical erasing section is activated immediately after the readout, and the previous readout value and the elapsed time are referred to, whereby the radiation This is to obtain the time derivative information of the quantity.

That is, FIG. 7 shows the time-dependent change in the density of the color accumulated in the functional dye, that is, the absorbance in a certain fluctuating dose field. At a certain time, at the same time as or immediately after reading, optical erasing is performed to initialize information. However, in consideration of the chemical properties of the dye, the state of use, and the like, there are cases where complete erasure cannot be performed. This figure shows that a part of the information read last time does not return to the initial value even after the erasing operation and remains.

In such a case, first, the value immediately after the erasing operation is read. After a lapse of ΔT from this point, reading is performed again, and attention is paid to the difference ΔV from the value immediately after the erasing operation. After this reading, the stored information is erased in the same manner as in the previous reading, and immediately after that, the value is read again.

According to the present embodiment, the time interval ΔT
By paying attention to the difference ΔV between the value at the start and the value at the end of the error, an error component due to incomplete initialization / erase can be canceled.

Eighth Embodiment (FIG. 5) In this embodiment, the optical information stored in the radiation sensitive section is read out at certain time intervals to obtain time integral information of the amount of radiation.

That is, referring to the case of FIG. 5, when the erasing operation is not performed after reading the value, the information is only accumulated at all times.

Therefore, when the value is read at time T1, the integration information integrated from the start of measurement to time T1 can be read as value V1.

Ninth Embodiment (FIG. 7) FIG. 7 is an explanatory view showing a ninth embodiment of the present invention.

This embodiment includes both the information reading means of the eighth and fifth embodiments or the information reading means of the eighth and sixth embodiments, and simultaneously obtains both the differential information and the integral information. It was made possible.
This embodiment is common to FIG. 5 or FIG. 6 described above.

That is, the difference ΔV between the time intervals ΔT
, Information corresponding to the dose rate can be obtained, but by integrating these ΔV, information corresponding to the integrated dose can be obtained.

In the case of the example shown in FIG. 5, the normal read value itself indicates the integral amount, and when the differential amount is obtained, the difference between the integrated value read data of plural times and the time difference between the data are obtained. What is necessary is just to calculate.

Conversely, as shown in FIG. 6 or FIG. 7, when the information is to be erased / initialized each time the data is read, the read difference data ΔV itself is integrated every time to obtain the integrated dose. Can be obtained.

Of course, even if the erasing operation as shown in FIG. 5 is not performed at every reading operation, the erasing / initializing operation may be performed as necessary to avoid saturation of the stored information.

Tenth Embodiment (FIG. 8) FIG. 8 is an explanatory view showing a tenth embodiment of the present invention.

In this embodiment, a plurality of radiation sensitive parts having different sensitivities to radiation are connected to function as one radiation sensitive part.

That is, as shown in FIGS. 8 (a), 8 (b) and 8 (c), since the information accumulated in the functional dye is due to a chemical reaction, the dye is contained at a finite concentration. As long as the amount of accumulated information is, there is a certain saturation amount and a limit. The sensitivity to these so-called radiations largely depends not only on the radiation sensitivity of the dye itself but also on the dye concentration itself.

Therefore, in the present embodiment, FIG.
As shown in (b) and (c), the dynamic range of measurement can be expanded by combining different types of dyes or simply dyes having different concentrations. Specifically, in FIG. 8, three kinds of pigment-containing substances I, II, and III are provided as the pigment-containing substance 1 in the disturbance light protection unit 2. Among them, the first dye-containing substance I has the highest sensitivity,
Is the substance having the lowest sensitivity, and the second pigment-containing substance II is a substance having an intermediate sensitivity.

FIG. 8 (a) shows that these three types of dye-containing substances 1 are combined and incorporated into a disturbance light protection part as one sensitive substance.

According to the present embodiment having the dye-containing material having such a configuration, as shown in FIGS.
II reacts and accumulates information in the region where
In the region where I is also saturated, the operation of III reacts and accumulates information, and the dynamic range can be expanded.

Eleventh Embodiment (FIGS . 9 and 10) FIGS. 9 and 10 are explanatory diagrams showing an eleventh embodiment of the present invention.

This embodiment is different from the first to tenth embodiments in that it has means for compensating for changes or fluctuations in light intensity due to performance deterioration or aging of the optical components and the light source itself. This means is a means for returning the light of the light irradiation unit as reference light to the light measurement unit.

In the example shown in FIG. 9, based on the first embodiment shown in FIG. 1, the light of the light irradiating section 4 which is a light source is returned to the light measuring section 5 by the light feedback section 11 as reference light. ing.

After taking such measures, the light measuring unit 5 can cancel or correct the influence of the fluctuation or deterioration of the light source by performing arithmetic processing such as the ratio or difference between the reference light and the observation light. .

In the example shown in FIG. 10, a switch 12 is interposed between the optical branching / combining device 7 and the radiation sensitive section 9 and these are connected by the optical transmission medium 6.

From the switch 12 shown in FIG. 10 toward the tip, the optical transmission medium 6 having the radiation sensitive portion 9
And the optical transmission medium 6 without the radiation sensitive part 9 are connected.

In the present embodiment, by performing arithmetic processing such as the ratio and difference between the two, the secular change and radiation damage of the optical transmission medium 6 and other intermediate parts with the radiation sensitive part 9 can be achieved. Can be canceled or corrected.

[0094]

As described in detail above, according to the optical storage type radiation measuring apparatus according to the present invention, light of arbitrary intensity is irradiated to measure the transmission and reflection state of the light. Measurement with higher S / N can be performed as compared with the method using a stimulable luminous body. In addition, by proposing methods for erasing and integrating accumulated information and reading differential information, reversibility,
Regardless of irreversible type of functional dye, it becomes possible to provide a means of remote continuous monitoring utilizing each characteristic.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a second embodiment of the present invention.

FIG. 3 is an explanatory view showing a third embodiment of the present invention.

FIG. 4 is an explanatory view showing a fourth embodiment of the present invention.

FIG. 5 is an explanatory view showing a fifth embodiment of the present invention.

FIG. 6 is an explanatory view showing a sixth embodiment of the present invention.

FIG. 7 is an explanatory view showing a ninth embodiment of the present invention.

FIG. 8 is an explanatory view showing a tenth embodiment of the present invention.

FIG. 9 is an explanatory view showing an eleventh embodiment of the present invention.

FIG. 10 is an explanatory view showing an eleventh embodiment of the present invention.

FIG. 11 is an explanatory view showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 dye-containing substance 2 disturbance light protection unit 3 reflector 4 light irradiation unit 5 light measurement unit 6 optical transmission medium 7 light branching / combining unit 8 light erasing unit 9 radiation sensitive unit 10 IC package 11 light feedback unit 12 switch 13 Stimulated luminescence 14 Optical fiber 15 Scanner 16 Excitation light source 17 Stimulated luminescence detector

Claims (11)

[Claims] 1. A dye-containing substance consisting of a solid or liquid containing an organic dye which causes a coloring or discoloration reaction by ionizing radiation, and a disturbance light protection unit for blocking external light from entering the dye-containing substance from outside. An optical system comprising: a radiation-sensitive unit having a radiation-sensitive unit; a light irradiation unit that irradiates the radiation-sensitive unit with measurement probe light; and a light measurement unit that measures the intensity or wavelength of transmitted light or reflected light. Storage type radiation measurement device. 2. A dye-containing substance consisting of a solid or liquid containing an organic dye which causes a coloring or discoloration reaction by ionizing radiation, and a disturbance light protection unit for blocking external light from entering the dye-containing substance. A radiation sensitive part having, a light irradiating part for irradiating the radiation sensitive part with measurement probe light, a light measuring part for measuring the intensity or wavelength of the transmitted light or the reflected light, and accumulated in the radiation sensitive part An optical storage type radiation measuring apparatus, comprising: a light erasing unit for erasing information. 3. The optical storage type radiation measuring apparatus according to claim 1, wherein an optical fiber is used as a transmission medium for a part of the light irradiation part, the light measurement part, and the light erasing part, or for all the light. Optical storage type radiation measurement device. 4. An optical storage type radiation measuring apparatus in which the components of the optical storage type radiation measuring apparatus according to claim 1 are enclosed in a package of an integrated circuit. 5. The optical storage type radiation measuring apparatus according to claim 1, wherein the optical information stored in the radiation sensitive section is read at a certain time interval, and the previous read value and the elapsed time are referred to. An optical storage type radiation measuring apparatus comprising means for obtaining time differential information of the amount of radiation. 6. The optical storage type radiation measuring apparatus according to claim 2, wherein the optical information stored in the radiation sensitive section is read out at a certain time interval, and the optical erasing section is activated immediately after the reading out, and the optical erasing section is operated immediately after the reading out. An optical storage type radiation measuring apparatus comprising means for obtaining time differential information of the amount of radiation by referring to the elapsed time of the radiation. 7. The optical storage type radiation measuring apparatus according to claim 2, wherein the optical information stored in the radiation sensitive section is read out at a certain time interval, and the optical erasing section is activated immediately after the reading out, and the previous readout value is read. By referring to the elapsed time,
An optical storage type radiation measuring apparatus comprising means for obtaining time differential information of the amount of radiation. 8. The optical storage type radiation measuring apparatus according to claim 1, further comprising means for reading out optical information stored in the radiation sensitive section at certain time intervals, and obtaining time integration information of the amount of radiation. Optical storage type radiation measurement device. 9. An information reading means according to claim 8 and claim 5 or claim 8 and claim 6,
An optical storage-type radiation measurement device capable of simultaneously obtaining both differential information and integral information. 10. An optical storage type radiation measuring apparatus according to claim 1, wherein a plurality of radiation sensitive parts having different sensitivities to radiation are connected to function as one radiation sensitive part. Optical storage type radiation measurement device. 11. An optical storage type radiation measuring apparatus according to claim 1, wherein a means for compensating for a change or a change in light intensity based on performance deterioration or aging of the optical parts and the light source itself is provided. The optical storage type radiation measuring apparatus includes a means for returning light from the light irradiation unit to the light measurement unit as reference light.