US3714504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron optic system utilizing a focusing electrode having a more positive voltage than the two adjacent electrodes
Assignee: Individual
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Filing: 1970-10-20
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Granted: 1973-01-30
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Expires: 1990-10-20
Abstract
Abstract A system wherein spherical aberration is reduced in an electronoptic device having post deflection acceleration by connecting the focusing electrode of an ''''einzel'''' type electrostatic electron lens to a unitary source of potentials at a potential more positive than the potential connected to the electrodes disposed on either side of the focusing electrode. In every case, the same supply above mentioned provides all the potentials necessary to operate the device.
Inventors
- 👤 K Amboss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:40
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/58; H01J29/62; H01J29/622; H01J29/624; H01J3/00; H01J3/02; H01J3/029
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
141 words
An electron-optic system exhibiting reduced aberration, comprising: a single power source providing a cathode potential VC, an electron lens potential VL, a focusing electrode potential VF, and a final anode potential VS; and an electron optic device including a cathode electrode connected to said VC, and a final acceleration electrode connected to said VS, which is a greater positive potential than said VC, said device also including an electrostatic lens of the ''''einzel'''' type which is disposed between said cathode and said final acceleration electrode and including lens electrodes disposed on either side of a focusing electrode and electrically connected to said VL which is a greater positive potential than said VC, but less than said VS, said focusing electrode being electrically connected to said VF, which is a greater positive potential than said VL, but not more than said VS''.
Claim 2
Dependent Claim
141 words
An electron-optic system exhibiting reduced aberration, comprising: a single power source providing a cathode potential VC, an electron lens potential VL, a focusing electrode potential VF, and a final anode potential VS; and an electron optic device including a cathode electrode connected to said VC, and a final acceleration electrode connected to said VS, which is a greater positive potential than said VC, said device also including an electrostatic lens of the ''''einzel'''' type which is disposed between said cathode and said final acceleration electrode and including lens electrodes disposed on either side of a focusing electrode and electrically connected to said VL which is a greater positive potential than said VC, but less than said VS, said focusing electrode being electrically connected to said VF, which is a greater positive potential than said VL, but not more than said VS''.
Claim 3
Dependent Claim
141 words
An electron-optic system exhibiting reduced aberration, comprising: a single power source providing a cathode potential VC, an electron lens potential VL, a focusing electrode potential VF, and a final anode potential VS; and an electron optic device including a cathode electrode connected to said VC, and a final acceleration electrode connected to said VS, which is a greater positive potential than said VC, said device also including an electrostatic lens of the ''''einzel'''' type which is disposed between said cathode and said final acceleration electrode and including lens electrodes disposed on either side of a focusing electrode and electrically connected to said VL which is a greater positive potential than said VC, but less than said VS, said focusing electrode being electrically connected to said VF, which is a greater positive potential than said VL, but not more than said VS''.
Claim 4
Dependent Claim
141 words
An electron-optic system exhibiting reduced aberration, comprising: a single power source providing a cathode potential VC, an electron lens potential VL, a focusing electrode potential VF, and a final anode potential VS; and an electron optic device including a cathode electrode connected to said VC, and a final acceleration electrode connected to said VS, which is a greater positive potential than said VC, said device also including an electrostatic lens of the ''''einzel'''' type which is disposed between said cathode and said final acceleration electrode and including lens electrodes disposed on either side of a focusing electrode and electrically connected to said VL which is a greater positive potential than said VC, but less than said VS, said focusing electrode being electrically connected to said VF, which is a greater positive potential than said VL, but not more than said VS''.
Claim 5
Dependent Claim
32 words
An electron-optic system according to claim 1, wherein said electron optic device includes a post deflection acceleration electrode and wherein said lens electrodes are electrically connected to said post deflection acceleration electrode.
Claim 6
Dependent Claim
26 words
An electrostatic optic system according to claim 1, wherein said lens electrodes and said focusing electrode are centrally apertured conductive elements aligned with said cathode electrode.
Claim 7
Dependent Claim
26 words
An electron-optic system according to claim 1 wherein said unitary power source includes a voltage dividing network providing all the output potentials of said power supply.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |