Patent ID: 8870452

Claim:
An optical system for an infrared radiation thermometer and its focusing structure, including an eyepiece slide, an objective slide component, an objective focusing ring, a spectroscope component and an optical outer slide component, wherein: an inner cavity of the optical outer slide component is provided with the spectroscope component and the objective slide component, a connecting interface for an infrared focusing light-spot receiving device is arranged outside the optical outer slide component, the back end of the optical outer slide component is provided with the objective focusing ring and the eyepiece slide that are coaxially piled and is further provided with a protective nut cap, an eyepiece can be shifted and focused by stretching the eyepiece slide at the rear end of the optical outer slide, an objective can be shifted and focused by rotating the objective focusing ring, the nut cap at the rear end can be used for locking the measurement image distance of the objective and implementing fully-sealed protection on the whole focusing operation position, and the optical system directly can be used as an optical probe of the infrared radiation thermometer and can also be used for constructing various other types or forms of infrared radiation thermometers.