Real time detection of cracked quartz window

A method of detecting a crack in a body of a quartz window comprising the steps of:

• providing a source of a light beam and a light receiver;
• applying a reflective coating onto an exterior surface of the quartz window;
• directing the light beam from the source into the quartz window to have the beam undergo a plurality of predetermined strokes within the body of the quartz window in the course of successive reflections thereof from an exterior surface of the quartz window to thereby probe the body;
• and
• judging of absence of a crack in the body of the quartz window by receiving a reflected beam by the light receiver, the receiver being installed so as to catch the beam having unobtrusively passed through the body of the quartz window.

A method of detecting a crack in a body of a quartz window comprising the steps of:

• providing a source of a light beam;
• directing the laser beam from the source into the quartz window to have the beam undergo a plurality of predetermined strokes within the body of the quartz window in the course of successive reflections thereof from an exterior surface of the quartz window to thereby probe the body;
• providing a light receiver, the receiver being installed so as to catch the light beam having unobtrusively passed through the body of the quartz window, a place where the receiver is installed depending on the number of the reflections selected for the beam, completeness of detecting being higher with increasing the number of the reflections;
• and
• judging of absence of a crack in the body of the quartz window by receiving a reflected light beam by the light receiver.