US3585384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ionic microanalyzers
Assignee: Centre National de la Recherche Scientifique
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Filing: 1969-11-19
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Granted: 1971-06-15
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Expires: 1989-11-19
Abstract
Abstract In an ionic microanalyzer, the energy filtering of the ions of the beam providing an image of a sample is effected by means of a spherical capacitor, suitably associated with the magnetic deflector used for the momentum-to-charge ratio filtering, through an intermediate lens system.
Inventors
- 👤 Raymond Castaing
- 👤 Georges Soldzian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:00
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/252; H01J49/00; H01J49/26; H01J49/28; H01J49/284; H01J49/286
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
118 words
An ionic microanalyzer as claimed in claim 1 wherein, each of said deflectors having for said optical axis thereof an achromatic focal point located on the image axis thereof, and said further point of said axis of said first lens means coinciding with the conjugate relatively to said first deflector, at least as far as radial focusing is concerned, of said achromatic focal point of said first deflector, said second lens means being further such that said image plane intersects said axis of said second lens means at a point which, in relation to the second deflector, is the conjugate, at least as far as radial focusing is concerned, of said achromatic focal point of said second deflector.
Claim 2
Dependent Claim
43 words
An ionic microanalyzer as claimed in claim 2, wherein said first lens means and said further lens means lie on one and the same side of said plane normal to said radial plane and wherein said second lens means comprise a single lens.
Claim 3
Dependent Claim
44 words
An ionic microanalyzer as claimed in claim 2, wherein said first lens means and said further lens means respectively lie on opposite sides of said plane normal to said radial plane and wherein said second lens means comprise a first and a second lens.
Claim 4
Dependent Claim
122 words
An ionic microanalyzer as claimed in claim 1, wherein: said axis of said first lens means and said axis of said further lens means are parallel to each other and perpendicular to said axis of said second lens means; said axis of said second lens means and that one of the two axes of said first and further lens means which is intersected by one of said lateral faces of said gap make angles equal in absolute value to Arc tan 1/2 with the normals at said lateral faces of said gap at their respective points of intersection with said lateral faces; and a stigmator is provided for correcting the astigmatism of the image of said surface provided by said magnetic deflector.
Claim 5
Dependent Claim
81 words
An ionic microanalyzer as claimed in claim 5, wherein said diaphragm is centered on said axis of said second lens means at a point located at the distance D 2R-r from the point at which said last-mentioned axis is tangent to said arc of a circle of said optical axis of said spherical capacitor, R and r being respectively the radii of said arcs of a circle of said optical axes of said magnetic deflector and of said electrostatic deflector respectively.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |