Lamp having a high-reflectance film for improving directivity of light and heat treatment apparatus having such a lamp
US6825615B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2001 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Dec 7, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01K1/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lamp for a heat treatment apparatus that provides a rapid temperature rise without using a reflector. The lamp has at least one electrode part to which an electric power is supplied. A light-emitting part, connected to the electrode part, seals a filament for emitting light. A high-reflectance film is formed on an outer surface of a first portion of the light-emitting part so as to reflect light emitted from the filament. Reflected light exits from the light-emitting part through a second portion not having a film formed thereon. Accordingly, directivity of light exiting from the second portion of the light-emitting part is improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.