High-temperature endoscope preventing impurities of ingot growth apparatus from being deposited

A high-temperature endoscope for preventing impurities of an ingot growth apparatus from being deposited, comprising:

• a frame extending to the inside of a chamber of the ingot growth apparatus and having at least one gas discharge port provided at an end portion thereof through which an inert gas is discharged;
• a lens installed at the center of the end portion of the frame and protected by the inert gas discharged from the at least one gas discharge port;
• and
• a guide tube installed on an outer surface of the frame and having a guide portion extending from the end portion of the frame so as to guide the inert gas to prevent impurities from being deposited on the lens by increasing a flow rate of the inert gas,
• wherein an inner surface of an end portion of the guide tube has a reduced diameter portion protruding toward a longitudinal central axis of the guide tube,
• wherein the reduced diameter portion has an inner diameter linearly reduced from a first diameter to a second diameter toward the end portion of the guide tube,
• wherein an inner diameter of the guide tube at a position where the lens is located is relatively greater than the first diameter of the reduced diameter portion, and
• wherein a difference between the inner diameter of the guide tube at the position where the lens is located and the first diameter is relatively smaller than a difference between the first diameter and the second diameter.