High transmission mass spectrometer with improved optical coupling
US5189304A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1991 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Aug 19, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J49/32
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosed mass spectrometer has, positioned between an input slit and an output slit, crossed by particles emitted by a sample, an optical coupling system placed between two respectively electrostatic and magnetic sectors. The optical coupling system comprises at least two lenses with slits oriented respectively along a first direction in which the path of the ions is incurvated by the electrostatic and magnetic sectors and along a direction perpendicular to the plane of the path. The position of the two lenses on the optical axis of the spectrometer is determined to obtain a compensation for the chromatic dispersions throughout the axis downline from the spectrometer, a stigmatic image of the input slit in the output plane of the spectrometer and a stigmatic image downline from the spectrometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.