Patent US3101430A successfully refreshed from Google Patents.
US3101430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensating lens
Assignee: Carl Zeiss AG
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Filing: 1960-08-16
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Granted: 1963-08-20
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Expires: 1980-08-16
Abstract
No abstract record available.
Inventors
- 👤 Scherzer Otto
- 👤 Steigerwald Karl Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:12
CPC Classifications
H; H01; H01J; H01J29/00; H01J29/46; H01J29/56; H01J29/58; H01J29/62; H01J29/622; H01J29/624
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
APPARATUS FOR COMPENSATING FOR THE APERTURAL DEFECT OF AN ELECTRON OPTICAL LENS OF ROTATIONAL SYMMETRY WHICH IS FREE OF SPACE CHARGE, COMPRISING A CORRECTIVE LENS, SAID CORRECTIVE LENS BEING POSITIONED NEAR THE PRINCIPAL PLANE OF SAID ELECTRON OPTICAL LENS, SAID CORRECTIVE LENS COMPRISING A FIRST AND SECOND RING ELECTRODE POSITIONED IN PARALLEL PLANES PERPENDICULAR TO THE AXIS OF THE BEAM, A NETTING CLAMPED BETWEEN SAID RING ELECTRODES AND INSULATED THEREFROM, AND MEANS FOR BIASING EACH OF SAID RING ELECTRODES TO INDUCE A CHARGE DISTRIBUTION ON SAID NETTING VARYING WITH THE DISTANCE FROM THE CENTER OF THE NETTING, THE TOTAL CHARGE SO INDUCED ON THE NETTING TRAVERSED BY THE BEAM BEING SO SLIGHT THAT NO DISTURBING LENS EFFECT OF THE INDIVIDUAL NETTING MESHES OCCURS.
Claim 2
Dependent Claim
123 words
APPARATUS FOR COMPENSATING FOR THE APERTURAL DEFECT OF AN ELECTRON OPTICAL LENS OF ROTATIONAL SYMMETRY WHICH IS FREE OF SPACE CHARGE, COMPRISING A CORRECTIVE LENS, SAID CORRECTIVE LENS BEING POSITIONED NEAR THE PRINCIPAL PLANE OF SAID ELECTRON OPTICAL LENS, SAID CORRECTIVE LENS COMPRISING A FIRST AND SECOND RING ELECTRODE POSITIONED IN PARALLEL PLANES PERPENDICULAR TO THE AXIS OF THE BEAM, A NETTING CLAMPED BETWEEN SAID RING ELECTRODES AND INSULATED THEREFROM, AND MEANS FOR BIASING EACH OF SAID RING ELECTRODES TO INDUCE A CHARGE DISTRIBUTION ON SAID NETTING VARYING WITH THE DISTANCE FROM THE CENTER OF THE NETTING, THE TOTAL CHARGE SO INDUCED ON THE NETTING TRAVERSED BY THE BEAM BEING SO SLIGHT THAT NO DISTURBING LENS EFFECT OF THE INDIVIDUAL NETTING MESHES OCCURS.
References Cited (Backward Citations)
US2486856A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-19 | 1967-02-18 | 1967-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-19 | 1971-02-18 | 1971-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-19 | 1975-02-18 | 1975-08-20 | $7700.00 | Window Closed / Lapsed |