Patent ID: 11971366
Assignee: NAGANO AUTOMATION CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An inspection system comprising:
a probe that is hollow, extends in a rod-like shape along a center axis so as to be able to rotate about the center axis;
an optical system that, through the probe, supplies laser light for inspection purposes along the center axis and receives reflected light from a surface of an inspection target that has returned along the center axis;
an optical element that, through an opening at a front end of the probe, emits the laser light for inspection purposes toward the inspection target with respect to the center axis and guides the reflected light in a direction of the center axis;
a gas supplying system that supplies gas through an inside of the probe and discharges the gas from the opening, through which the laser light is emitted and the reflected light is guided;
a holder that supports the probe and is rotationally driven;
an inner cylinder portion that is hollow and does not rotate, the inner cylinder portion being coaxially provided inside the holder with a bearing unit between the holder and the inner cylinder portion; and
an optical fiber that does not rotate and is inserted into the probe through the inner cylinder portion,
wherein the gas supplying system includes a gas feeding path that feeds the gas inside the probe through the inner cylinder portion.