JPH0961319A - Suction type sample base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To flatly support a thin sample on a sample base used when measuring optical characteristics of a thin sample such as paper or a fabric. SOLUTION: An opening section 18 formed with a sample base frame 11 is covered with a meshy support body 12, support members supporting the support body 12 are arranged in the opening section 18, and the opening section 18 is sucked via a suction port 14 provided on the sample base frame 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the optical characteristics of a flat and thin sample surface such as paper or cloth, or a thin plate for thin layer chromatography or a sample plate such as an electrophoresis gel. The present invention relates to a sample stand used in a densitometer or the like for optically quantifying a sample spot.

[0002]

2. Description of the Related Art In order to measure the surface of thin samples such as those mentioned above, especially paper and cloth, it is necessary to hold the sample in a flat state. Generally, a method of fixing the sample to the sample table, a method of adhering the sample itself to the sample table, and a method of pressing the surface of the sample with a transparent plate such as glass are generally adopted.
However, it is difficult to fix a large area of the sample by the above-mentioned clamp mechanism, and it is difficult to maintain the flatness of the central part of the sample. In this case, the fixed adhesive may be measured together, and the biggest difficulty is that the adhesive adheres to the sample and the sample itself is damaged, or even if it can be measured There was a possibility that it would be a destructive measurement. Finally, in the method of pressing with a transparent material such as a glass plate, the surface of the sample cannot be directly observed, and the reflection and transmission optical characteristics of the glass plate adversely affect the measurement. In some cases, it was necessary to cut the sample into the size of glass or to attach it to a glass plate.

[0003]

SUMMARY OF THE INVENTION According to the present invention, it is difficult to fix a large-area sample, which is required by the conventional technique, it is difficult to maintain the flatness of the central portion, and sometimes it is necessary to bond the sample. The objective is to provide a sample stand that does not have defects such as direct observation that is impossible when using a transparent glass plate.

[0004]

To this end, the present invention provides
The suction method is adopted, and the sample is suction-supported on the mesh-shaped support body which is maintained flat.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present invention, an opening formed by a sample underframe is covered with a mesh-shaped support on which a sample is placed, and a support member for supporting the bending of the mesh support is arranged in the opening. In addition, the sample is to be adsorbed on or held by the mesh-shaped support through the suction port provided in the sample frame.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view of a sample stage including a suction type sample table according to the present invention.
Reference numeral 11 is a sample underframe that forms the skeleton of the sample table, 12 is a mesh-like support (for example, a wire mesh) that covers the opening of the sample underframe, and 13 is the sample table opening and a suction pump (not shown). The sample pipe 1 is connected to the suction port provided in the sample frame by a suction pipe that connects the sample frame 1 and the sample pipe 1. On the other hand, 2 is a sample stage on which the suction type sample table 1 is set, and the suction type sample table 1 is set on the stage table 21 of the sample stage 2 via an appropriate mechanism. Reference numeral 22 is a clip provided at each end of the stage table 21. When a flat sample, for example, a sample such as paper or cloth, is larger than the suction type sample table 1, this clip 22 is attached to the suction type sample table 1. It is used for fixing to this stage in the covered state.

FIG. 2 illustrates the details of the suction type sample table described above, and the same reference numerals as those in FIG. 1 denote the same parts as those in FIG.

In this figure, the mesh-like support 12,
For example, a wire mesh or the like may have an appropriate size, but if it is too large, the sample placed on it will not be a flat surface, and an uneven surface will be generated as a whole, so care must be taken.

The mesh-like support 12 is a sample underframe 11
The cover 18 is covered with the opening 18 of the box-shaped box and fixed by a suitable means. Reference numeral 14 is a suction port provided on the sample underframe 11 to which a suction pipe 13 is connected, and the inside (opening) 18 of the box is sucked, and as a result, a sample such as cloth or paper is operated by a suction pump. , The mesh-like support is sucked and adsorbed, and the flat surface is maintained.

Next, FIGS. 3 (1), 2 (3) and 3 (3) show support members of various shapes for supporting the bending of the mesh-shaped support 12 installed in the opening 18 of the suction type sample table 1. 3 (1) (3), a plurality of rectangular frames are joined in a rectangular shape or alternately, or a hexagonal frame is formed in a honeycomb shape as shown in FIG. 3 (2). However, as is clear from this figure, the rectangular frame 16 has all holes 17 formed therein.

These supporting members are provided in the opening 18 of the sample table 1.
Then, the mesh-shaped support 12 is stretched and fixed so as to cover the opening 18. At this time, the presence of the support member prevents the mesh-shaped support 12 from bending.

Then, paper is placed on the mesh-shaped support 12,
Even when a thin sample such as cloth is placed, the opening 18 of the sample table 1 is sucked through the suction pipe 13, so that the sample is adsorbed by the mesh-shaped support and kept flat. on the other hand,
This mesh-like support 12 is provided with a support member 15 at the bottom.
Since the mesh-shaped support 12 is not bent, the sample is held flat as a result.

At this time, the holes 1 of each frame 16 of the support member
The suction force of the suction pipe by 7 is the opening 1 of the sample table 1.
8 acts on the entire area of the sample 8, and the sample is similarly aspirated over the entire area of the opening and aspirated along the surface of the mesh-shaped support, that is, adsorbed and positioned.

When the sample itself is large, the part (edge) protruding from the sample table is fixed by the clip of the sample stage as shown in FIG.

FIG. 4 illustrates the usage of this suction type sample table, for example, the situation when it is used in a chromatographic scanner.

In the figure, reference numerals 22 and 23 denote light sources, and two types of light sources are prepared to cover a wide measurement wavelength range. (For example, the light source 22 is a xenon lamp or a tungsten lamp, the light source 23 is a deuterium lamp) 24 is a spherical mirror for selecting a light source, and makes the light flux from the light source 22 or 23 enter the spectroscope 25. 29 is a spectroscope 25
Is an exit slit, and the dispersed light flux is emitted. On the exit slit 29 of this spectroscope, a slit disc 30
Is installed, for example, a slit 31 is formed such that the increment of the distance from the center is proportional to the rotation angle.

The center of the slit disk 30 is fixed to the rotating shaft of the pulse motor 32 and driven straight.

In this case, as shown in FIG. 5, the slit disk is positioned so that the longitudinal direction of the exit slit 29 is the radial direction of the slit disk 30.

Next, 32 is a spherical mirror and 33 is a plane mirror, which reflects the measurement light beam 34 passing through the hole at the intersection of the exit slit 29 and the slit 31 to reflect the sample S on the sample stage 35 on the suction-type sample table 1. Irradiate the top.

The sample stage 35 moves in the X and Y directions, is driven by a pulse motor 36 via a belt 37 in the X direction, and drives a belt 39 by a pulse motor 38 in the Y direction. To move.

The pulse motor 38 for moving in the Y direction is used when changing the irradiation point of the light beam, and the pulse motor 36 for moving in the X direction is used when changing the scanning lane on the sample S.

The measuring light beam 34 is incident on the sample S, and the reflected light from this sample is measured by the reflection measuring photomultiplier tube 40.

Although detailed description of these measuring methods is omitted, since the light beam scans the sample S in a zigzag manner by the rotation of the slit disk and the sample S itself is moved in the X and Y directions, Can be scanned with a light beam, and for example, the optical characteristics of the sample can be detected.

In this case as well, since the sample S is adsorbed on the suction type sample table 1 through the suction pipe 13, it does not fall off from the sample table even when it is moved in the X and Y directions, and the sample surface Since the mesh-shaped support is held by the support member without being bent, it becomes flat and can be measured with high accuracy.

In the above description, the suction type sample table is used by mounting it on the sample stage. However, depending on the measuring device, the suction type sample table alone may not be used. It is possible.

Further, although the honeycomb shape in which the frame members are combined is explained as the supporting member arranged in the opening, it is not limited to this, and it is obvious that various shapes such as a plurality of columnar shapes can be used. is there.

[0027]

By using the sample table described above, a thin sample such as paper or cloth can be supported on a flat surface, and two-dimensional photometry and color measurement can be performed under ideal conditions. It is possible and easy to use by combining various optical measuring instruments, which is convenient, but it is also highly useful as a sample stand for accurately supporting a sample.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a situation in which a suction-type sample table of the present invention is placed on a sample stage.

FIG. 2 is a view for explaining the structure (configuration) of the suction type sample table of the present invention.

FIG. 3 is a diagram illustrating the shape of a support member arranged in the opening of the suction-type sample table of the present invention.

FIG. 4 is a diagram for explaining the usage of the suction type sample table of the present invention.

5 is a diagram for explaining the positional relationship of slits, slit discs, etc. in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Suction-type sample stand 11 ... Sample stand frame 12 ... Mesh support 13 ... Suction pipe 14 ... Suction port 15 ... Support member 18 ... Opening part

Claims (1)

[Claims] 1. A sample underframe, a mesh-like support that covers the opening of the sample underframe, and on which a sample can be placed, and the sample underframe that is arranged in the opening defined by the sample underframe. A suction-type sample table having a support member for supporting the bending of the mesh-shaped support and a suction port provided in the sample frame.