Development of infrared radiation pyrometer with optical fibers—Two-color pyrometer with non-contact fiber coupler

A new type of pyrometer is developed, in which two optical fibers are used to accept and transmit the infrared energy. These two fibers are connected using a non-contact fiber coupler. In turning, the incidence face of one optical fiber which is embedded in a rotating workpiece accepts the infrared rays radiated from the cutting tool and emits it at the other face. The infrared energy is accepted by the other optical fiber which is fixed at the pyrometer and led to the two-color detector. In endmilling, the temperature history of CBN tool face during cutting is measured, where the fiber is embedded in the endmill.