Uniform raster pattern generating system
US6380545B1 · kind B1 · utility
50Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Aug 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J37/147
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A conventional particle generation and magnet configuration are used in combination with a relatively low-power power amplifier, a resonant loop magnet driver system, an amplitude modulator that induces a homogeneous amplitude function proportional to (t)½ and, when individual X and Y magnets are used, a precision phase shifter that induces a 90° phase shift in the applied power to one of the magnets to produce a circular raster pattern of virtually uniform density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.