JPH0448512Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to the structure of a cell for highly sensitively measuring the temperature or temperature distribution of an object to be measured whose temperature changes are small.

[Prior Art] When measuring the temperature or temperature distribution of a measurement target with small temperature changes, such as a living tissue or an organ, conventionally, as shown in Figure 3a, a thermograph was used while the measurement target A was exposed to the indoor atmosphere. The photograph was taken or measured using device T. In the same figure, B is the background object, which is set at a lower temperature than the measurement target.The measurement target is made to stand out to make it easier to observe, and by setting an appropriate threshold level, it is possible to detect the target from the infrared video signal. This is to facilitate data processing by extracting only the signal.

However, with the above configuration, the surface temperature of the object changes due to convection (wind) of indoor air,
Accurate, high-sensitivity measurements are not possible; b. Temperature drift within the room greatly affects measurement results; c. It is difficult to provide sufficient temperature to living tissues and organs.
There were problems such as dryness making it difficult to measure over a long period of time.

In order to solve these problems, Figure 3b
As shown in FIG. 2, it is conceivable to place a subject and a background object in a temperature-controlled measurement cell C and perform measurement through an infrared transmitting window W attached to the wall of the cell. In this way, the effects of temperature changes and drift due to indoor air can be removed, and it is also possible to provide appropriate humidity within the cell.

[Problems to be solved by the invention] However, in such a configuration, a low-temperature background object is placed inside the cell whose temperature is being controlled, which causes convection, which makes it difficult to accurately control the temperature. .

The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a measurement cell that can accurately adjust the temperature inside the cell without being affected by background objects.

[Means for solving the problem] In order to achieve this objective, the measurement cell according to the present invention includes a measurement cell with a closed structure for accommodating a sample, a temperature adjustment means for setting the inside of the measurement cell to a constant temperature, A first infrared transmitting window provided on the wall surface of the measurement cell for infrared photography of the sample from the outside, and a second infrared transmitting window provided on the cell wall surface on the opposite side of the first infrared transmitting window with the sample in between. , and a low-temperature background object that is placed at a distance outside the second infrared transmitting window and whose temperature is lower than the temperature inside the cell.

[Function] Since the cell has a sealed structure and measurements or images are taken through the first infrared transmitting window, it is possible to eliminate photographing caused by ambient temperature changes and indoor convection.Moreover, there is a second infrared transmitting window behind the sample. , and a low-temperature background object was placed at a distance outside of it.
Since no convection occurs within the cell, it is possible to accurately adjust the temperature within the cell without being affected by background objects. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

[Embodiment] Figure 1 shows an embodiment of the present invention, in which 1 is a measurement cell, 2 is a thermography device for taking infrared images, and 3 is a thermography device 2 with the measurement cell 1 in between. A cold background object placed on the opposite side.

The measurement cell 1 includes a sample chamber 5 that accommodates a sample 4.
It consists of a cell block 6 with an opening, and infrared transmitting windows 7 and 8 for partitioning the front and rear of the sample chamber from the surroundings. Inside the cell block 6 is a constant temperature water flow path 9.
The inside of the sample chamber is maintained at a constant temperature.

FIG. 2 shows a DD cross-sectional view of the cell 1. A water reservoir 10 is provided on the floor of the sample chamber, and a water-absorbing wall material 11 placed on the side wall of the sample chamber is placed inside the water reservoir.
The lower end of the water is submerged.

In the above-described configuration, the inside of the sample chamber 5 is isolated from the surroundings by the cell block 6 and the infrared transmitting windows 7 and 8, and the temperature is controlled, so that high sensitivity can be achieved without being affected by ambient temperature changes or wind. An infrared image of the sample 4 can be taken.

At the same time, an infrared transmitting window 8 is also provided on the back side of the sample as seen from the thermography device, and a background object 3 having a lower temperature than inside the cell is placed outside of the window 8, so that it cannot be photographed by the thermography device. In the resulting infrared image, sample 4 stands out with the low-temperature background object in the background, and the purpose of placing the background object mentioned above is fully achieved. Moreover, since the background object 3 is placed at a distance outside the cell, it does not have a negative effect on the temperature inside the cell, and accurate temperature control is possible.

The temperature of the background object may be lowered by about 10 to 20 degrees Celsius than the temperature inside the cell, for example by cooling it with ice.

Furthermore, in this example, a water-absorbing wall material was applied to the wall of the sample chamber to absorb water, so the humidity in the sample chamber was close to 100%, making it possible to prevent biological tissues or organs from drying out. These samples can be observed over long periods of time.

Note that temperature control within the cell is not limited to the method of circulating water, and other methods may be used. At that time, it is desirable to consider the temperature inside the cell so that dew does not form on the window.

Depending on the sample, the atmosphere most suitable for the sample may be created, such as by filling the sample chamber with nitrogen gas.

[Effects of the Invention] As described in detail above, according to the present invention, a measurement cell is realized in which the temperature inside the cell can be accurately controlled without being affected by background objects.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, FIG. 2 is a sectional view taken along the line DD, and FIG. 3 is a diagram for explaining the problems of the prior art. 1...Measurement cell, 2...Thermography device,
3... Low temperature background object, 4... Sample, 5... Sample chamber, 6... Cell block, 7, 8... Infrared transmitting window, 10... Water reservoir, 11... Wall material.

Claims (1)

[Scope of utility model registration request] A measurement cell with a sealed structure for accommodating a sample, a temperature control means for setting the inside of the measurement cell to a constant temperature, and a first infrared transmission window provided on the wall of the measurement cell for infrared photography of the sample from the outside. a second infrared transmitting window provided on the cell wall on the opposite side of the first infrared transmitting window across the sample; and a second infrared transmitting window disposed at a distance outside the second infrared transmitting window and controlling the temperature inside the cell. A highly sensitive infrared measurement cell characterized by comprising a low-temperature background object at a lower temperature.