JPH0448503Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a photometric probe provided at the end of an optical fiber during photometry.

<Prior Art> Measurement using an optical fiber has the advantage that the main body of the measuring device can be placed at a position away from the object to be measured. Generally, such optical fibers are not used alone but in bundles, and one end of these optical fiber bundles is connected to the main body of the measuring device, and the other end of the optical fiber bundle is provided with a photometric probe. things are being done. When performing photometry using an optical fiber bundle provided with such a photometric probe, a measurement start switch for activating the measuring apparatus body is provided in the measuring apparatus body. Therefore, it is necessary to place the photometric probe on the object to be measured, then move to the measuring device located in a remote location and operate the measurement start switch, which makes it difficult to connect the object to be measured and the measuring device main body. It was not possible to take full advantage of the advantage of being able to place them apart.

Therefore, in the past, a foot switch was provided near the photometric probe, or an electric switch was provided on the probe.

<Problems to be solved by the invention> However, in these cases, lead wires are required to connect the foot switch or the electrical switch of the probe to the measuring device, and these lead wires are connected to the optical fiber bundle or the probe. There was a problem that they got tangled and hindered operability.

<Means for solving the problem> A means for solving the above problem is to use an optical switch as a switch for driving the main body of the measuring device, and to install this optical switch on the photometric probe.
Light is sent and received to and from this optical switch using some optical fibers in the optical fiber bundle.

<Operation> According to such a means, when the optical switch is operated, the light that was previously being transmitted (or not being transmitted) to the main body of the measuring device is no longer transmitted (or is being transmitted). By this,
The measuring device main body is driven.

<Embodiment> FIG. 2 is a perspective view of this embodiment, in which 10 is a measuring device main body, 12 is a measuring probe, 14 is an optical fiber bundle, and the measuring device main body 10 and the measuring probe 12 are
are connected.

FIG. 1 is a partially omitted sectional view of the measurement probe 12, in which 14a and 14b are optical fiber bundles housed in the probe body 16. These two fibers 14a, 14b constitute an optical fiber bundle 14 shown in FIG. Optical fiber bundle 1
Reference numeral 4a is used to irradiate the object to be measured with the light transmitted from the measuring device main body 10 from the tip of the probe main body 16. The optical fiber bundle 14b is for transmitting reflected light incident on the tip of the probe body 16 from the object to be measured to the measuring device body 10.

An operating section 20 of the optical switch 18 is provided at a proper location on the probe body 16. A reflecting plate 22 is provided at the lower end of the operating section 20 so as to penetrate into the probe body 16. This reflective plate 22
is raised as shown in FIG. 1 when the operating section 20 is not operated, and when the operating section 20 is operated and pushed down, the reflecting plate 22 is also lowered. Note that the pressed down state of the operating section 20 is maintained by a claw or the like (not shown), and when the operating section 20 is pushed somewhat downward in this state, the operating section 20 is raised by the action force of the spring 24.

Near the reflecting plate 22, the tip of the optical fiber 14c taken out from the optical fiber bundle 14a and the tip of the optical fiber 14d taken out from the optical fiber bundle 14b are located. When the reflector 22 is raised as shown in FIG. 1, the light from the optical fiber 14c is not transmitted to the optical fiber 14d, but when the reflector 22 is lowered, the light from the optical fiber 14c is transmitted to the reflector 14c. 22 and is reflected by the optical fiber 14
d, the optical fibers 14c, 14
The position of the tip of d has been selected.

In this embodiment, when the tip of the probe 12 is placed on the object to be measured and pushed down by operating the operating section 20, the reflection plate 22 is lowered and the optical fiber 14c is moved downward.
The light from the optical fiber 1 is reflected by the reflection plate 22 and
4d and transmitted to the measuring device main body 10. The light transmitted to the measuring device main body 10 is converted into an electrical signal by a light receiving element (not shown) within the measuring device main body 10. The measurement device main body 10 is driven by the generation of this electrical signal.

In the above embodiment, when the operation unit 20 is operated, the light from the optical fiber 14c is transmitted to the optical fiber 14d, but as shown in FIG. , when the operation unit 20 is not operated, the optical fiber 14c
The configuration is such that light is transmitted from the optical fiber 14c to the optical fiber 14d, and when the operating section 20 is operated, the reflecting plate 22 descends and the light is transmitted from the optical fiber 14c to the optical fiber 14d.
It may be configured to stop transmitting light to.
Further, if the object to be measured emits light from itself, the optical fiber 14a is not necessary, and in that case, the light input to the optical fiber 14d may be obtained from the object to be measured. That is, the optical fiber 14d is configured to receive light from the object to be measured, and the operating section 20 is configured so that when it is pushed downward, it automatically returns to its original state by the action force of the spring 24. ,
The optical fiber 14 is activated only during the period when the operation unit 20 is pressed.
Since the light to d is blocked, this blockage is detected by the measuring device main body 10.

<Effects> As described above, according to this invention, since the switch for driving the measuring device main body 10 is provided in the probe main body, it is possible to separate the object to be measured and the measuring device main body as in the conventional method. Can be placed in position. Moreover, this switch uses an optical switch, and the transmission of the light from the optical switch to the main body of the measuring device is as follows.
Since the optical fibers in the optical fiber bundle used to transmit the measurement light to the measuring device main body are used, there is no chance of it becoming entangled with the probe main body or the optical fiber bundle, improving operability.

[Brief explanation of drawings]

FIG. 1 is a partially omitted longitudinal sectional view of one embodiment of the photometric probe according to this invention, FIG. 2 is a perspective view of the same embodiment, and FIG. 3 is a partially omitted side view of the main part of another embodiment. . 10... Measuring device main body, 12... Probe, 1
4... Optical fiber bundle, 16... Probe body, 1
8...Light switch.

Claims (1)

[Scope of utility model registration request] It includes a probe body provided at the end of an optical fiber bundle opposite to the measurement device body, which transmits light for photometry to the measurement device, and an optical switch provided on the probe body, A photometric probe that uses some of the optical fibers in the optical fiber bundle to transmit light to a switch.