Infrared light source
US5731594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1996 |
| Grant date | Mar 24, 1998 |
| Priority date | — |
| Expiry date | Aug 20, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K7/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An infrared light source used in spectrometers including an infrared range, a Fourier Transform Infrared Spectroscope (FTIR), etc. The infrared light source is composed of a panel made of sintered silicon nitride plates, a heating element made of metal and embedded in the panel, and a pair of conducting lines for supplying electricity to the heating element. The infrared light is emitted homogeneously from the flat surface of the panel, as compared to a conventional infrared light source using a metal filament in which infrared light is emitted inhomogeneously. It is preferred to form a silicon oxide layer on a surface of the panel to prevent initial change in the infrared emitting characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.