JP2754686B2 - Spectrophotometer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sample chamber of a spectrophotometer.

(Prior Art) Conventionally, a sample chamber of a spectrophotometer is provided with a slide-type or rotary-type lid, and when a sample is put in and out, the lid is opened and a hand is inserted into the sample chamber to put a sample in and out. . Also,
During the measurement, the lid was closed to prevent external light from entering the sample chamber. In this case, the inside of the sample chamber of the spectrophotometer is shielded from light from outside so that the inside is not visible. You have to work by fumbling. Therefore, the work was difficult and troublesome. Further, in order to improve the workability, it is necessary to make the opening large enough to allow the hands to be freely put in and out, and thus there is a limit in reducing the size of the sample chamber.

(Problems to be Solved by the Invention) It is an object of the present invention to facilitate a sample exchange operation and reduce the size of a sample chamber in a spectrophotometer.

(Means for solving the problems) A sample stage is provided in the sample chamber of the spectrophotometer so that it can enter and exit freely.
By providing a door (lid) in the sample chamber and opening the door,
The sample stage was able to move in the sample entry / exit direction.

(Operation) The sample chamber is a chamber configured in the outer casing of the spectrophotometer. This chamber has an opening on the side wall of the outer casing of the spectrophotometer. Usually, a hand is inserted through this opening to exchange the sample in the sample chamber. In the present invention, since the sample stage is provided with the sample stage so that it can enter and exit through the sample room opening, the sample exchange can be performed outside the sample room by pulling the sample stage out of the sample room.

(Embodiment) FIG. 1 shows an embodiment of the present invention. In FIG.
C is an outer casing of the spectrophotometer. In this outer housing, 1 is a light source, 2 is a light source mirror, and forms an image of the light source 1 on the entrance slit 3. The light passing through the entrance slit 3 is reflected by the reflection mirror 4 and the main mirror 5 and is guided to the diffraction grating 6 as a parallel light flux. The light diffracted by the diffraction grating 6 is
The wavelength scanning is performed by rotating the diffraction grating 6 that forms a spectrum image on the surface on which the exit slit 7 is disposed by a motor. The monochromatic light passing through the exit slit 7 is condensed on the photometric cell 11 by a lens 8 provided on the side wall of the sample chamber 9, and the light transmitted through the photometric cell 11 is condensed on a detector 12 by a lens 8 on the reflection side. Let me do. The sample chamber 9 is a chamber recessed from one surface of the outer housing C toward the outer housing, and has an exit slit 7.
The luminous flux emitted from the sample chamber passes through this sample chamber and is
Incident on the detector 12 disposed therein. Reference numeral 10 denotes a sample, in this case, a moving sample stage on which a photometric cell 11 is detachably mounted, and has a fitting recess for positioning the photometric cell,
As shown in FIG. 1B, a guide rail 14 and a rack 15 are provided on the lower surface in parallel with the moving direction of the moving sample table 10,
The rack 15 is meshed with a pinion 16 attached to a motor 17, and the guide rail moves on a traveling platform 18 provided on the bottom surface of the outer casing C. In the direction (up and down in FIG. 1A).
A lid (door) 19 provided at the side opening of the sample chamber 9 has a lower edge hinged to the outer casing C, is opened forward (rotated downward in FIG. 1A), and is opened. The guide rail 14 can travel on the traveling platform 18 and the lid 19 so that the upper surface matches the traveling surface of the traveling platform 18 provided below the sample chamber 9.

An operation of attaching and detaching the photometric cell 11 in the above embodiment will be described. The lid 19 is opened so that the upper surface of the lid 19 coincides with the surface of the traveling platform 18. The motor 17 is driven and the pinion 16
Is rotated, the movable sample stage 10 is pulled out to the dotted line in FIG. 1A, the photometric cell 11 is removed from the movable base 10, and the photometric cell is removed.
After replacing the photometer 11 with the photometric cell 11 attached to the moving sample stage 10, the motor 17 is reversed, the moving sample stage 10 is returned to the position indicated by the solid line in FIG. 1A, and the lid 19 is closed.

FIG. 2 shows a second embodiment. While the first embodiment slides the moving sample stage back and forth, the second embodiment rotates the moving sample stage about a vertical axis. Since the sample table 22 on which the photometric cell 11 is installed is fixed to a lid (door) 21 rotatably provided on one side of the sample chamber front opening of the outer casing C, the lid 21 is rotated. , The sample table 22 in the sample chamber 9
Therefore, the exchange of the photometric cell 11 on the sample table can be performed outside the sample chamber 9.

FIG. 3 shows a third embodiment. In the third embodiment, the sample stage is moved up and down. The sample room 9 has an upper surface opened, a lid (door) 31 is provided above the sample room 9, and the sample stage in which the photometric cell 11 is installed. 32 is held by a vertical slide guide 33 so as to be slidable up and down, and is pulled upward by a wire 37. The wire 37 is pulled by a take-up roller 35 attached to a motor 36 via a pulley 34 fixed above the slide guide 33, and the mounting table is driven by the motor 36.
32 can be moved up and down.

In the embodiment of FIG. 1, the lid on the front surface of the sample chamber may be fixed to the moving sample stage, and the lid may be closed by pushing the sample stage into the sample chamber. Further, in the embodiment shown in FIG. 1, the lid of the sample chamber which is moved forward and the movable sample table may be mechanically connected so that the movable sample table is pulled out in conjunction with opening the lid.

(Effects of the Invention) According to the present invention, the sample table on which the sample is placed can be pulled out of the sample chamber, so that the sample can be exchanged outside the sample chamber, which facilitates the work. Was.
Further, since the need to insert a hand into the sample chamber is eliminated, the size of the sample chamber can be reduced.

[Brief description of the drawings]

1 is an embodiment of the present invention. FIG. 1A is a plan view and FIG.
2 is a front view, FIG. 2 is a plan view of the sample chamber of the second embodiment, and FIG.
The figure is a side view of the sample chamber of the third embodiment. 1 ... light source, 2 ... light source mirror, 3 ... entrance slit,
4 ... reflection mirror, 5 ... main mirror, 6 ... diffraction grating,
7: Exit slit, 8: Lens, 9: Sample chamber, 10
… Moving sample stage, 11… Photometry cell, 12… Detector, 14…
… Guide rail, 15… Rack, 16… Pinion, 17…
... Motor, 18 ... Travel stand, 19 ... Lid.

Claims (3)

(57) [Claims] 1. A spectrophotometer has an outer housing and a door for opening and closing a sample in and out of a sample chamber formed in the outer housing. The door is openable and closable about a lower side, and when the door is opened, the inner surface of the door is opened. Is a spectrophotometer that is flush with a sliding surface of a traveling table that slides in and out of a sample table provided in a sample chamber and serves as a guide surface of the sample table. 2. A spectrophotometer, wherein an outer housing is provided with a door for opening and closing a sample in and out of a sample chamber formed in the outer housing. A spectrophotometer in which an installation table is provided so as to protrude and a sample can be installed on the installation table. 3. A spectrophotometer having a spectrophotometer provided with a door for taking a sample in and out of the outer casing above a sample chamber formed in the outer casing, and a sample mounting table provided in the sample chamber so as to be vertically movable. Total.