Glare protection device
US6887531B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 2002 |
| Grant date | May 3, 2005 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The glare protection device for welding applications contains an active electro-optical filter element (2) with an electronic control circuit (3). The active filter element (2) absorbs the UV-radiation up to 380 nm. An IR-plastic filter (10) is completely joined with the active electro-optical filter element by a compact adhesive layer (11) and together with it forms a single optical and mechanical unit (1) having a high transmittance in the visual region of the spectrum. The IR-plastic filter (10) contains a dye that absorbs the infrared radiation in a wavelength range of 780-1400 nm. With this, a robust, cheap and safe in operation glare protection device for various applications is created.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.