JPH0530760U - Optical measurement probe holder - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate adjustment of the distance between both probes. [Structure] A holder 20 has a recess 22 for holding a light-transmitting probe and a groove 2 for slidably holding a light-receiving probe.
4 is formed, and the groove 24 extends in the direction connecting both probes so that the light receiving probe can slide in the holder 20 in the direction connecting both probes, and one end is open. The bottom surface of the groove 24 is provided with a cutout for connecting the lead wire from the light receiving probe to the groove. A rectangular window 26 having a width smaller than the light receiving probe and extending in the direction connecting the probes is formed on the surface of the probe 20 on the side of the object to be measured so that the light receiving probe can face the object to be measured in the movement range.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a biometric device that non-destructively obtains information inside a living body by irradiating a measurement target such as a living body with light and detecting transmitted light or reflected light from the measurement target. The present invention relates to a probe holder for mounting a light-transmitting probe for irradiating an object to be measured and a light-receiving probe for receiving transmitted light or reflected light from the object to be measured on the object to be measured.

[0002]

[Prior Art]

 In order to attach the light-transmitting probe and the light-receiving probe to the object to be measured, a probe holder (hereinafter simply referred to as a holder) that is fixed to the object to be measured with the distance between both probes kept optimal is required. Figure 1 shows an example of a holder used when monitoring the inside of the brain with an optical measurement device. The holders 2a and 2b have a light-transmitting probe recess 6 and a light-receiving probe recess 8, and the distance between the two probes is fixed. In the holder 2a, the distance between the two probes is, for example, 40 mm, and in the holder 2b, the distance is 30 mm. The holder 4 is not provided with such a concave portion for fixing probes, and both probes can be fixed at an arbitrary distance. These holders are made of, for example, black sponge.

When using these holders, the light-sending probe 10 and the light-receiving probe 12 are fitted into the respective recesses 6 and 8 as shown in FIG. 2A, or as shown in FIG. Both probes 10 and 12 are pressed to the holder 2c at an arbitrary distance, the probe is placed on the head side of the object to be measured as shown in (C), and the holder is applied to the head and fixed by the belt 14. .. As shown in (D), the measuring device main body 16 is connected to send the measuring light from the light transmitting probe to the object to be measured, and the light receiving probe receives the reflected light or the transmitted light to prepare for the measurement. The in-vivo information is obtained from the amount of light detected by the light-receiving probe after the light emitted from the light-transmitting probe passes through the living body and is absorbed.

Since accurate information cannot be obtained when the detected light amount is too large or too small, it is necessary to adjust the light amount so that it is appropriate. The amount of detected light increases as the distance between the light-transmitting probe and the light-receiving probe decreases, and decreases as the distance increases. Therefore, adjusting the amount of detected light is effective by adjusting the distance between both probes. In the case of the conventional holder, for example, if the amount of detected light is too small when the measurement at the preparatory stage is performed using the holder 2a having a long inter-probe distance, the measurement is performed instead of the holder 2b. If the holder 2b does not provide an appropriate amount of light, the holder 2c is used to set the distance between both probes to an appropriate distance.

[0005]

[Problems to be solved by the device]

 In the conventional holder, in order to adjust the distance between the two probes, the holder fixed to the object to be measured is removed again and replaced with a holder with a different distance between the probes, or the position of the probe is changed with the holder 2c having no recess and the holder is replaced again. It is necessary to repeat the operation of re-fixing the object to be measured until the optimum condition is reached. However, the operation for such adjustment is a complicated work, which not only burdens the experimenter but also significantly burdens the subject. An object of the present invention is to provide a holder that can easily adjust the distance between both probes.

[0006]

[Means for Solving the Problems]

 In the holder of the present invention, a groove that extends in the direction connecting the two probes and has an opening at the end is provided in the part that holds at least one of the light-transmitting probe and the light-receiving probe. There was a window that extended to the groove and connected to the groove.

[0007]

[Action]

 Attach the light-transmitting probe and the light-receiving probe to the holder and attach the holder to the measurement target. With the measuring device still operating, slide the probe held in the slidable groove in the holder, and adjust the distance between the two probes so that the appropriate amount of detected light can be obtained.

[0008]

【Example】

 FIG. 3 shows an embodiment. (A) is a front view seen from the side of the object to be measured, (B) is a bottom view thereof, (C) is a cross-sectional view taken along the line AA of (A), and (D) is B of (A). FIG. 7 is a cross-sectional view taken along the line B. The holder 20 has a recess 22 for holding the light-transmitting probe and a groove 24 for slidably holding the light-receiving probe. The recess 22 is formed in the shape of a light transmitting probe. The groove 24 extends in the direction connecting the two probes so that the light receiving probe can slide in the holder 20 in the direction connecting the two probes, and has one end open. The bottom surface of the groove 24 is provided with a notch 27 connected to the groove for taking out the lead wire from the light receiving probe. A rectangular window 26 having a width smaller than the light receiving probe and extending in the direction connecting the probes is formed on the surface of the holder 20 on the side of the object to be measured so that the light receiving probe can face the object to be measured in the movement range. .. The surface 21 of the holder 20 on the side of the measuring object is slightly curved to fit the measuring object, for example, the head of the human body. The material of the holder 20 is not particularly limited, but is soft plastic, for example.

FIG. 4 shows how the probe is held by the holder 20. As shown in FIG. 4A, the light transmitting probe 10 is fitted into the recess 22 and the light receiving probe 12 is inserted from the opening of the groove 24. The light-receiving probe 12 can be moved in the groove 24 in the direction in which the distance from the light-sending probe 10 is changed as shown in FIG. ..

A method of using this holder is shown in FIG. As shown in FIG. 4 (B), the probes 10 and 12 are held in the holder 20, and the holder 20 is pressed against the head as shown in FIGS. 5 (A), (B), and (C), and fixed by the belt 14. .. As shown in (D), the measuring device main body 16 is operated, the light receiving probe is slid in the holder while observing the detected light amount, and when the light receiving probe reaches an appropriate light amount, the movement of the light receiving probe is stopped. The inter-probe distance is determined by. The holder 20 remains attached to the subject and only the probe is moved while adjusting the probe spacing. In the embodiment, the position of the light transmitting probe is fixed and the light receiving probe is slid, but conversely, the light receiving probe may be fixed and a recess and a groove may be formed so that the light transmitting probe can be slid. Also, a groove may be formed so that both probes slide together.

[0011]

[Effect of the device]

 In the present invention, since the holder is fixed to the object to be measured, at least one of the light-transmitting probe and the light-receiving probe can be slid in the direction in which the distance between the two probes is changed, so that the distance between the two probes can be adjusted. If the probe is attached to the target site before measurement using this holder, it is not necessary to remove the holder until the measurement is completed, and the burden on the experimenter and the test subject due to attachment and detachment of the holder is reduced.

[Brief description of drawings]

1A, 1B, and 1C are plan views showing a conventional holder, respectively.

FIG. 2 is a diagram showing a method of using a conventional holder.

3A and 3B are diagrams showing an embodiment, in which FIG. 3A is a front view seen from the side of the object to be measured, FIG. 3B is a bottom view thereof, and FIG. 3C is a view taken along the line AA of FIG. Sectional view, (D) is B of (A)
It is a sectional view in the B line position.

FIG. 4 is a perspective view showing how the probe is held in the same embodiment.

FIG. 5 is a view showing a method of using the same embodiment.

[Explanation of symbols]

 20 holder 22 recessed portion for light transmitting probe 24 groove for light receiving probe 26 window

Claims (1)

[Scope of utility model registration request] 1. A light-transmitting probe and a light-receiving probe in a probe holder in which a light-transmitting probe for irradiating a measurement object with a measurement light and a light-receiving probe for receiving transmitted light or reflected light from the measurement object are mounted on the measurement object. A groove that extends in the direction connecting both probes and opens at the end is provided in the part that holds at least one of the above, and a window that extends in the groove direction and connects to the groove is provided on the surface that contacts the measurement object. Characteristic probe holder.