JPH0733140Y2 - Aiming structure of radiation thermometer - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a sighting structure of a radiation thermometer capable of easily obtaining an accurate light spot sighting at the time of temperature measurement.

[Conventional technology]

Conventionally, as a mechanism for matching the aim of the radiation thermometer with the light spot, a structure in which an aiming optical system is installed separately from the measuring optical system (for example, Japanese Utility Model Laid-Open No. 55-175835), or A structure in which an aiming optical system is added to a measuring optical system (Japanese Utility Model Laid-Open No. 55-36327, Japanese Patent Laid-Open No. 61-228320, Japanese Utility Model Laid-Open No. 62-30129) and the like are known.

However, these aiming mechanisms have a problem that it is generally difficult to obtain accurate aiming due to the use of two series of optical systems, and it is difficult to make adjustments to achieve accurate light point aiming. In addition, in the latter structure in which the aiming optical system is added to the measuring optical system, there is a problem in that a part of the optical path is mechanically blocked, resulting in loss of incident energy.

[Problems to be solved by the device]

This invention aims to solve the above-mentioned problems of the conventional mechanism,
By using the same optical system for measurement and aiming, accurate and easy aiming mechanism was realized.

Therefore, an object of the present invention is to provide an aiming structure of a radiation thermometer, which can always obtain an accurate light point aiming easily.

[Means for Solving the Problems]

The aiming structure of the radiation thermometer according to the present invention for achieving the above object is such that the detection element and the aiming light source rotate or move immediately after the diaphragm provided at the point where the radiation from the object to be measured is focused. A structural feature is that a moving mechanism that alternately moves by horizontal sliding is provided.

[Action]

According to this invention, since the detecting element for measurement and the light source for aiming have a mechanism which can be alternately moved and set at the converging position of the fixed single optical system (position immediately after the diaphragm), the temperature measuring At this time, when the aiming light source is moved and set to the condensing position, the light emitted from the aiming light source and passing through the diaphragm produces a light spot on the object to be measured. Since the optical path at this time follows the optical path opposite to the radiated light at the time of temperature measurement and passes through the same optical system, there is no positional deviation due to the difference in optical system unlike the conventional mechanism. Further, since the light spot is an image formed by the aperture of the diaphragm, the position of the aiming light source does not need to be particularly precise.

After the aiming of the light spot is performed in this way, the detecting element is moved and set to the position of the aiming light source to measure the temperature.

With the above-described mechanism action, it becomes possible to easily and accurately aim the light spot, and highly accurate temperature measurement can be performed.

〔Example〕

Hereinafter, the present invention will be described in detail based on illustrated embodiments.

FIG. 1 is a schematic sectional view showing a radiation thermometer having an aiming structure according to the present invention, in which 1 is an optical system, 2 is a diaphragm, 3 is a moving mechanism equipped with a detecting element 4 and an aiming light source 5. The moving mechanism 3 of this example has a structure in which the detecting element 4 and the aiming light source 5 are alternately moved by rotational movement.
2 and the aiming light source 5 are installed at equal intervals from the center on a disk 7 having a rotation axis 6 at the center as shown in FIG.
As shown in FIG. 2 (a), the rod-shaped or plate-shaped body 8 having the rotating shaft 6 at the center is installed at equal intervals from the center, and the rotation of the rotating shaft causes the detecting element 4 and the aiming light source 5 to alternate immediately after the diaphragm 2. It is supported via a bearing 9 so as to move to the position.

However, the moving mechanism 3 is not limited to the above-described rotational movement, and has a structure in which the disc 7 on which the detection element 4 and the aiming light source 5 are installed, and the rod-shaped or plate-shaped body 8 are horizontally slid to move. You can also do it.

FIG. 3 is an explanatory view showing a state at the time of aiming a light spot. First, the moving mechanism 3 is rotated or horizontally slid to move and set the aiming light source 5 immediately after the diaphragm 2. At this stage, the irradiation light 10 emitted from the aiming light source 5 passes through the diaphragm 2 and forms a light spot on the temperature-measured object 11 by the optical system 1. After aiming with this light spot, the moving mechanism 3 is rotated or horizontally slid to detect the detection element 4.
Immediately after the aperture 2 is moved to the temperature measurement operation.

At the time of temperature measurement, the light emitted from the temperature-measured object 11 is focused on the detection element 4 through the same optical system by the optical path opposite to the irradiation light 10 at the time of aiming at the light spot. Therefore, there is no phenomenon that the incident energy is lost due to the shielding of the optical system during the sighting and temperature measurement process.

[Effect of device]

As described above, according to the aiming structure of the radiation thermometer according to the present invention, it is possible to easily perform the light aiming with the same optical system, so that the accurate light aiming can be performed with a simple mechanism.

Therefore, the temperature measurement operation is always guaranteed with excellent measurement accuracy.

[Brief description of drawings]

FIG. 1 is a schematic sectional view illustrating an aiming structure of a radiation thermometer according to the present invention, FIGS. 2A and 2A are perspective views showing members of a moving mechanism, and FIG. 3 is a state of light aiming. It is the explanatory view shown. 1 ... Optical system, 2 ... Aperture 3 ... Moving mechanism, 4 ... Detection element 5 ... Aiming light source, 6 ... Rotating shaft 7 ... Disc, 8 ... Rod-shaped or plate-shaped body 9 ... Bearing, 10 ... Irradiated light 11 ... Object to be measured

Claims (1)

[Scope of utility model registration request] 1. A detection element (4) and a light source for aiming (5) are rotationally moved or horizontally slid immediately after a diaphragm (2) provided at a point where light emitted from an object to be measured (11) is condensed. An aiming structure for a radiation thermometer, comprising a moving mechanism (3) for alternately moving the positions according to.