Patent US3819941A successfully refreshed from Google Patents.
US3819941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass dependent ion microscope having an array of small mass filters
Assignee: Bendix Corp
•
Filing: 1973-10-15
•
Granted: 1974-06-25
•
Expires: 1993-10-15
Abstract
Abstract A mass dependent ion microscope having an array of very small mass filters, interposed between the source of an ion image and an image transducer for transmitting on a point-for-point basis only ions of a predetermined mass-to-charge ratio, is described. The point-for-point transmission by the mass filter array preserves the image information of the original ion image and permits the filtered ion image to be visually observed on a phosphor screen or otherwise detected. The individual filter elements of the array may be either of the monopole or quadrupole structure fabricated from glass.
Inventors
- 👤 J Carrico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:02
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/26; H01J37/285; H01J37/02; H01J37/04; H01J37/05; H01J49/00; H01J49/0004; H01J49/004; H01J49/009; H01J49/26; H01J49/34; H01J49/42; H01J49/4205; H01J49/421; H01J49/4215
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
95 words
A mass dependent ion microscope comprising: means for supporting a sample to be investigated; means fOr stimulating said sample to emit an ion image representative of the sample; means for magnifying said emitted ion image; an array of mass filters receiving said magnified ion image, transmitting therethrough on a point-for-point basis, the ions of said magnified ion image having a predeterminable mass-tocharge ratio, and absorbing ions having a different mass-tocharge ratio; and means receiving said transmitted ion image having a predetermined mass-to-charge ratio for generating a detachable output signal indicative of said transmitted ion image.
Claim 2
Dependent Claim
95 words
A mass dependent ion microscope comprising: means for supporting a sample to be investigated; means fOr stimulating said sample to emit an ion image representative of the sample; means for magnifying said emitted ion image; an array of mass filters receiving said magnified ion image, transmitting therethrough on a point-for-point basis, the ions of said magnified ion image having a predeterminable mass-tocharge ratio, and absorbing ions having a different mass-tocharge ratio; and means receiving said transmitted ion image having a predetermined mass-to-charge ratio for generating a detachable output signal indicative of said transmitted ion image.
Claim 3
Dependent Claim
13 words
The mass dependent ion microscope of claim 1 further including an evacuable enclosure.
Claim 4
Dependent Claim
19 words
The mass dependent ion microscope of claim 2 wherein said means for stimulating is a source of energetic particles.
Claim 5
Dependent Claim
18 words
The mass dependent ion microscope of claim 3 wherein said source of energetic particles is an ion source.
Claim 6
Dependent Claim
18 words
The mass dependent ion microscope of claim 3 wherein said source of energetic particles is an electron source.
Claim 7
Dependent Claim
19 words
The mass dependent ion microscope of claim 2 wherein said means for stimulating is a source of ionizing radiation.
Claim 8
Dependent Claim
19 words
The mass dependent ion microscope of claim 6 wherein said source of ionizing radiation is a source of x-rays.
Claim 9
Dependent Claim
20 words
The mass dependent ion microscope of claim 6 wherein said source of ionizing radiation is a source of lambda rays.
Claim 10
Dependent Claim
21 words
The mass dependent ion microscope of claim 6 wherein said source of ionizing radiation is a source of intense electromagnetic radiation.
Claim 11
Dependent Claim
17 words
The mass dependent ion microscope of claim 9 wherein said source of electromagnetic radiation is a laser.
Claim 12
Dependent Claim
23 words
The mass dependent ion microscope of claim 2 wherein said means for stimulating is means for heating said sample to cause thermionic emission.
Claim 13
Dependent Claim
72 words
The mass dependent ion microscope of claim 2 wherein said array is an array of quadrupole mass filters comprising a plurality of individual laterally enclosed quadrupole elements disposed in a parallel relationship with respect to each other, each quadrupole element receiving a like portion of said magnified ion image and transmitting therethrough on a point-for-point basis ions of a predeterminable mass-to-charge ratio and adsorbing all other ions having a different mass-to-charge ratio.
Claim 14
Dependent Claim
47 words
The mass dependent ion microscope of claim 12 wherein each individual quadrupole element comprises: four conductor rods of a predeterminable radius and length symmetrically disposed about a longitudinal axis; a surface laterally enclosing said four conductor rods; and means for supporting said rods within said enclosing surface.
Claim 15
Dependent Claim
52 words
The mass dependent ion microscope of claim 13 wherein said surface is a glass cylinder having a high resistance internal surface and said conductor rods are glass rods having low resistance external surfaces wherein said glass rods are fused to the internal surface of said cylinder supporting said rods in said cylinder.
Claim 16
Dependent Claim
74 words
The mass dependent ion microscope of claim 12 wherein said quadrupole array further includes means for generating an alternating electrical signal having a predeterminable frequency and predeterminable amplitude, said electrical signal applied to predetermined conductors in each of said quadrupole elements generate a dynamic electric field operative to cause ions of a predetermined mass-to-charge ratio to have a stable trajectory through said elements and ions having a different mass-to-charge ratio to have unstable trajectories.
Claim 17
Dependent Claim
71 words
The mass dependent ion microscope of claim 2 wherein said array is an array of monopole mass filters comprising a plurality of individual laterally enclosed monopole elements disposed in parallel relationship with respect to each other, each monopole element receiving a like portion of said magnified ion image and transmitting therethrough on a point-for-point basis ions of a predeterminable mass-to-charge ratio and absorbing all other ions having a different mass-to-charge ratio.
Claim 18
Dependent Claim
40 words
The mass dependent ion microscope of claim 1 wherein means for generating a detectable output signal is a phosphor screen disposed proximate said quadrupole array for generating on a point-for-point basis a visible image representative of said transmitted ion image.
Claim 19
Dependent Claim
82 words
The mass dependent ion microscope of claim 17 wherein said means for generating a detectable output signal further includes an array of microchannel electron multipliers, disposed between said quadrupole array and said phosphor screen, said microchannel array receiving said transmitted ion image and generating on a point-for-point basis an amplified electron image representative of said transmitted ion image, further said phosphor screen receiving said amplified eletron image and generating on a point-for-point basis a visible light image representative of said electron image.
Claim 20
Dependent Claim
82 words
The mass dependent microscope of claim 17 wherein said means for generating a detectable output signal further includes an array of microchannel electron multipliers, disposed between said quadrupole array and said ion detector, said microchannel array receiving said transmitted ion image and generating on a point-for-point basis an amplified electron image representative of said transmitted ion image, further said ion detector receiving said amplified electron image and generating on a point-for-point basis is a visible light image representative of said electron image.
Claim 21
Dependent Claim
69 words
The mass dependent ion microscope of claim 19 wherein said ion detector is a planar array of discrete detector elements, each detector element individually operative to store an electrical charge indicative of the number of incident ions, said detector further including means for electronically interrogating in a predetermined sequence each individual detector element and generating an electrical signal indicative of the number of ions incident on each detector element.
Claim 22
Dependent Claim
48 words
The mass dependent ion microscope of claim 19 wherein said ion detector is a storage element operative to store an electrostatic image indicative of said transmitted ion image, said detector further including means for scanning said electrostatic image and generating an electrical signal indicative of the electrostatic image.
Claim 23
Dependent Claim
64 words
The mass dependent ion microscope of claim 17 wherein said means for generating a detectable output signal further includes: means disposed proximate said quadrupole array for converting on a point-for-point basis said transmitted ion image into an electron image; and an electron lens disposed between said means for converting and said phosphor screen for magnifying and focusing said electron image on said phosphor screen.
Claim 24
Dependent Claim
35 words
The mass dependent ion microscope of claim 22 wherein said means for generating further includes an array of microchannel electron multipliers disposed between said electron lens and said phosphor screen for amplifying said electron image.
Claim 25
Dependent Claim
30 words
The mass dependent ion microscope of claim 1 wherein said means for generating a detectable signal is an ion detector generating an electrical signal indicative of said transmitted ion image.
Claim 26
Dependent Claim
64 words
The mass dependent ion microscope of claim 24 wherein said means for generating a detectable output signal further includes: means disposed proximate said quadrupole array for converting on a point-for-point basis said transmitted ion image into an electron image; and an electron lens disposed between said means for converting and said ion detector for magnifying and focusing said electron image on said ion detector.
Claim 27
Dependent Claim
35 words
The mass dependent ion microscope of claim 25 wherein said means for generating further includes an array of microchannel electron multipliers disposed between said electron lens and said ion detector for amplifying said electron image.
Claim 28
Dependent Claim
69 words
The mass dependent ion microscope of claim 26 wherein said ion detector is a planar array of discrete detector elements, each detector element individually operative to store an electrical charge indicative of the number of incident ions, said detector Further including means for electronically interrogating in a predetermined sequence each individual detector element and generating an electrical signal indicative of the number of ions incident on each detector element.
Claim 29
Dependent Claim
48 words
The mass dependent ion microscope of claim 26 wherein said ion detector is a storage element operative to store an electrostatic image indicative of said transmitted ion image, said detector further including means for scanning said electrostatic image and generating an electrical signal indicative of the electrostatic image.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |