Target holding jig and measurement apparatus

1. A target holding jig for holding a target including a reflection mechanism for reflecting measurement light emitted from a light source, and bringing the target and an end surface of an object to be measured into contact with each other, the target holding jig comprising:

a supporting portion configured to support the target being in contact with the object to be measured;

a guide portion disposed on a side of the supporting portion facing the object to be measured, the guide portion being configured to regulate a contact position of the target with the object to be measured in a short side direction of the end surface of the object to be measured, and configured to restrict the movement of the target in the short side direction of the end surface of the object to be measured; and

a coupling portion fixed to the supporting portion, the coupling portion including a holding portion defining a groove for removably coupling to the object to be measured,

wherein the supporting portion includes an opening formed in a surface facing the object to be measured so as to accommodate the target therein, and

wherein the guide portion is disposed on the surface of the supporting portion facing the object to be measured so as to be positioned collinearly with the coupling portion, and includes two members extending collinearly with the coupling portion to form a linear groove positioned collinearly with the groove of the coupling portion.

2. The target holding jig according to claim 1 , wherein the coupling portion can be coupled to the object to be measured by holding the object to be measured with the holding portion.

3. The target holding jig according to claim 1 , further comprising:

a detection unit configured to detect contact between the target and the object to be measured; and

a notification unit configured to notify that the detection unit has detected the contact between the target and the object to be measured.

4. The target holding jig according to claim 3 , wherein the detection unit includes a power source connected to the target and the coupling portion, and the target, the coupling portion, the power source, and the notification unit are connected in series, and

when the target and the coupling portion are brought into contact with the object to be measured, the target, the coupling portion, the power source, the notification unit, and the object to be measured form a closed circuit.

5. The target holding jig according to claim 4 , further comprising:

an insulation portion which is disposed between the supporting portion and the coupling portion, and configured to insulate between the supporting portion and the coupling portion.

6. The target holding jig according to claim 3 , wherein the notification unit is a light emitting unit configured to emit light.

7. A measurement apparatus comprising:

the target holding jig according to claim 1 ;

a target held by the target holding jig; and

a measurement apparatus body including:

a light source configured to irradiate the target with measurement light;

a light receiving unit configured to receive the light reflected from the target; and

a processing unit configured to analyze a result of the light received by the light receiving unit.