| 摘要 |
PCT No. PCT/EP98/01246 Sec. 371 Date Oct. 30, 1998 Sec. 102(e) Date Oct. 30, 1998 PCT Filed Mar. 5, 1998 PCT Pub. No. WO98/44322 PCT Pub. Date Oct. 8, 1998The invention is directed to a probe tip (10) for a radiation thermometer in which the infrared radiation to be measured is directed through a waveguide device (12) to a radiation sensor (14) that converts the incident radiation into an electrical output signal from which the target temperature is determined by means of a downstream electronic measurement circuitry. To reduce temperature gradients in the sensor (14), the invention provides for the sensor housing (16) to be thermally coupled to the waveguide device (12) via a thermal coupling arrangement (24, 28, 30), such that the waveguide device is in direct thermal contact with the side of the sensor housing (16) close to the radiation and the opposite side thereof via the thermal coupling arrangement (24, 28, 30). Preferably, the thermal coupling arrangement (24, 28, 30) which is made of a material conducting heat well has substantially its entire surface area in abutting engagement with the corresponding sides of the sensor housing (16). Further, a suitable method for reducing temperature gradients in the housing (16) of the radiation sensor (14) is described. The probe tip (10) of the present invention enables the temperature to be determined accurately also in cases where inhomogeneous heating occurs. Still further, the probe tip is small, of light weight and compact, thus enabling easy-to-handle and user-friendly radiation thermometers to be built as they are conventionally used for measuring the temperature in a person's ear canal. |
