Heat-absorbing filter and method for making same
US6844976B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2000 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Jul 20, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C17/3417
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to a heat filter and a process for manufacturing this filter.This heat filter may for example be used to filter surgical or examination lighting composed of a light source which emits energy, or radiation, in the visible and infrared ranges. It allows the light emitted by this source to be filtered so as to prevent infrared radiation from hindering the surgical team or the patient.It includes a substrate, at least one layer of an infrared reflecting material, and a coating forming an interference filter in the visible range.The invention process includes the deposition on a substrate of a layer of an infrared reflecting material and the deposition on this layer of an interference filter in the visible range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.