FIBER-OPTIC THERMOMETER Russian patent published in 2006 - IPC G01K11/12 

FIELD: optical engineering.

SUBSTANCE: fiber-optic thermometer has two light sources, photoreceiver, and fiber coupler connected with the light sources through first light pipe. Coupler is also connected with photoreceiver through second light pipe and with temperature-sensitive element through the third light pipe. Temperature-sensitive element is made in form of semiconductor structure which has first edge side fastened to edge of third light pipe by means of transient layer. Reflecting coating in form of circle having center at geometrical axis of third light pipe and non-reflecting part in form of ring having center at geometrical axis of third light pipe are formed on the second edge side of temperature-sensitive element. Non-reflecting part has external border circle, which coincides with external border of temperature-sensitive element, and internal border structure circle, which coincides with external border of the mentioned circle.

EFFECT: improved precision of measurement.

5 dwg