Light guide for transmitting thermal radiation from melt to pyrometer and method of measuring temperature of molten metal in metallurgical vessel with the aid of said light guide
US4533243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1982 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Mar 15, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/0887
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The light guide and the method of measuring temperature with the aid of said light guide relate to optical pyrometry of melts. A light guide 1 is made from a light-permeable refractory corrosion-resistant material such as leucosapphire, for example, and according to the invention comprises 2 portions: a narrow portion 2 in the form of a rod, and a large portion 3 with a flat end 3a being an operating end of the light guide 1. The large portion 3 of the light guide 1 represents with respect to the narrow portion 2 an optical cavity producing radiation of the operating end 3a substantially in the form of a radiation of an absolutely black body. The ratio of the cross-section area of the narrow portion 2 at the place where it adjoins the large portion 3 does not exceed 0.5. According to the method the light guide 1 is mounted in a lining 6 so that the large portion 3 is exposed to a melt 5 and the narrow portion 2 extends to a pyrometer 7 so that the geometrical axis of the light guide 1 passes through the point of the inner surface of the lining 6, located in a zone l of the maximum circulation of the melt 5. Said point is located with respect to a residual level 5a of the melt 5 at …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.