Electronic optical apparatus comprising pyrolytic graphite elements
US4508967A · kind A · utility
9Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1983 |
| Grant date | Apr 2, 1985 |
| Priority date | — |
| Expiry date | Jan 11, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J37/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The electronic optical apparatus provided is such that the parts situated in the immediate vicinity of the beam, anode, screen placed inside the condenser block, screen formed from a tube and limiter diaphragms inside the deflection block, screen placed between the final focussing lens and the sample to be observed and the secondary electron collector electrode have their faces exposed to the electron beam formed from pyrolytic graphite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.