Emitter device with focusing columns
US6822241B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2002 |
| Grant date | Nov 23, 2004 |
| Priority date | — |
| Expiry date | Oct 3, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/3175
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An emitter device including a focusing array with plural focusing columns to focus emissions from one or more emitters onto a target medium. Relative movement between the target medium and the focused emissions allows each focusing column to focus emissions over an area of the target medium encompassing the movement range. In a preferred embodiment, separate emitter, focusing array and target medium substrates are used. The focusing array may be moveable, or in a particularly preferred embodiment, is affixed to the emitter substrate, in which case the target medium substrate is movable or the focusing array includes beam direction control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.