NL92251C - - Google Patents
Info
- Publication number
- NL92251C NL92251C NL92251DA NL92251C NL 92251 C NL92251 C NL 92251C NL 92251D A NL92251D A NL 92251DA NL 92251 C NL92251 C NL 92251C
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement, ion-optical arrangement
- H01J37/10—Lenses
- H01J37/14—Lenses magnetic
- H01J37/143—Permanent magnetic lenses
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0015—Non-sealed electrodes
- H01J2893/0018—Bar or cage-like grids
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP12132A DE857991C (en) | 1948-10-01 | 1948-10-01 | Electron lens working with permanent magnetic excitation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL92251C true NL92251C (en) |
Family
ID=25784630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL92251D NL92251C (en) | 1948-10-01 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2804548A (en) |
| CH (1) | CH301200A (en) |
| DE (2) | DE857991C (en) |
| GB (1) | GB722096A (en) |
| NL (1) | NL92251C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2928004A (en) * | 1954-08-27 | 1960-03-08 | Hitachi Ltd | Three stage electron lens system excited by permanent magnets |
| DE1035813B (en) * | 1956-01-13 | 1958-08-07 | Siemens Ag | Lens arrangement for electron microscopes or the like. |
| NL214979A (en) * | 1956-03-01 | |||
| US2945153A (en) * | 1956-08-31 | 1960-07-12 | Rca Corp | Electron beam tube |
| US2939994A (en) * | 1957-01-28 | 1960-06-07 | Westinghouse Electric Corp | Electron discharge device |
| JPS547236A (en) * | 1977-06-20 | 1979-01-19 | Hitachi Ltd | High-resolution cathode-ray tube |
| US4359706A (en) * | 1979-12-18 | 1982-11-16 | Arnold Flack | Magnet pole pieces and pole piece extensions and shields |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2163157A (en) * | 1937-07-22 | 1939-06-20 | Bell Telephone Labor Inc | Electron discharge apparatus |
| DE973258C (en) * | 1938-03-08 | 1959-12-31 | Siemens Ag | Magnetic pole shoe lens with a small focal length for electron-optical enlargements in electron microscopes |
| US2369796A (en) * | 1943-03-26 | 1945-02-20 | Rca Corp | Electron lens system |
| NL89013C (en) * | 1944-05-31 | |||
| US2503173A (en) * | 1946-10-18 | 1950-04-04 | Rca Corp | Permanent magnetic electron lens system |
| US2533687A (en) * | 1949-05-27 | 1950-12-12 | Quam Nichols Company | Magnetic focusing device |
| GB680300A (en) * | 1950-02-23 | 1952-10-01 | Vickers Electrical Co Ltd | Improvements relating to magnetic electron lenses |
-
0
- NL NL92251D patent/NL92251C/xx active
-
1948
- 1948-10-01 DE DEP12132A patent/DE857991C/en not_active Expired
-
1950
- 1950-08-26 DE DES18799A patent/DE891307C/en not_active Expired
-
1951
- 1951-05-31 GB GB12955/51A patent/GB722096A/en not_active Expired
- 1951-07-21 CH CH301200D patent/CH301200A/en unknown
-
1952
- 1952-01-19 US US267294A patent/US2804548A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2804548A (en) | 1957-08-27 |
| GB722096A (en) | 1955-01-19 |
| DE857991C (en) | 1956-01-12 |
| DE891307C (en) | 1956-08-23 |
| CH301200A (en) | 1954-08-31 |