NL94737C - - Google Patents
Info
- Publication number
- NL94737C NL94737C NL94737DA NL94737C NL 94737 C NL94737 C NL 94737C NL 94737D A NL94737D A NL 94737DA NL 94737 C NL94737 C NL 94737C
- 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 or ion-optical arrangement
- H01J37/10—Lenses
- H01J37/14—Lenses magnetic
- H01J37/143—Permanent magnetic lenses
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Lenses (AREA)
- Electron Beam Exposure (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE710960X | 1950-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL94737C true NL94737C (en) |
Family
ID=6619728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL94737D NL94737C (en) | 1950-08-29 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2761991A (en) |
| FR (1) | FR1043174A (en) |
| GB (1) | GB710960A (en) |
| NL (1) | NL94737C (en) |
Families Citing this family (3)
| 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 |
| NL100357C (en) * | 1955-10-04 | |||
| US2919381A (en) * | 1956-07-25 | 1959-12-29 | Farrand Optical Co Inc | Electron lens |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| BE437814A (en) * | 1939-02-21 | |||
| US2220973A (en) * | 1939-03-31 | 1940-11-12 | Rca Corp | Electron microscope |
| 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 |
-
0
- NL NL94737D patent/NL94737C/xx active
-
1951
- 1951-08-22 US US243070A patent/US2761991A/en not_active Expired - Lifetime
- 1951-08-22 FR FR1043174D patent/FR1043174A/en not_active Expired
- 1951-08-29 GB GB20402/51A patent/GB710960A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB710960A (en) | 1954-06-23 |
| US2761991A (en) | 1956-09-04 |
| FR1043174A (en) | 1953-11-06 |