Contact-noncontact type sapphire infrared temperature measurement system

The utility model discloses a contact-noncontact type sapphire infrared temperature measurement system which comprises a sensor unit, a signal processing unit, an A/D converter and a computer, wherein the sensor unit comprises a temperature measurement probe, a lens group, a sapphire optical fiber and an optical fiber joint; the tail part of the temperature measurement probe is provided with the lens group, the sapphire optical fiber is inserted on the rear part of the lens group and is in noncontact with the temperature measurement probe, and the sapphire optical fiber is connected with a common optical fiber through the optical fiber joint; the signal processing unit comprises an optical fiber directional coupler, a first light sensitive tube, a second light sensitive tube and a photoelectric signal conversion circuit; the common optical fiber is simultaneously transmitted to the first light sensitive tube and the second light sensitive tube through the optical fiber directional coupler; the first light sen