US3732426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
X-ray source for generating an x-ray beam having selectable sectional shapes
Assignee: NIHONA DENSHI KK
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Filing: 1971-07-30
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Granted: 1973-05-08
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Expires: 1991-07-30
Abstract
Abstract This specification discloses an X-ray source comprising an electron gun, an astigmator, a condenser lens and a target. The astigmator comprises four electrodes to which a voltage is supplied, said voltage determining the sectional shape of the electron beam passed through the astigmator. The electron beam passed through the astigmator is focused on the target by the condenser lens, the resultant impingement causing an X-ray to be generated from the target.
Inventors
- 👤 T Shimizu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:07
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/22; G01N23/223; H; H01; H01J; H01J29/00; H01J29/46; H01J29/56; H01J35/00; H01J35/02; H01J35/14; H01J35/147; G01N2223/00; G01N2223/07; G01N2223/076
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
An X-ray source for generating an X-ray pattern having a plurality of selectable sectional shapes comprising: A. an electron gun for producing an electron beam; B. a condenser lens comprising two coils, first, second and third pole pieces, the polarities of said first and third pole pieces being arranged opposite that of the second, such that the electron beam is not substantially rotated passing through the lens; C. means including an astigmator lens placed between said gun and condenser lens for shaping the electron beam into at least two distinct shapes; D. a target on which said beam is focused by said condenser lens, such that a shaped X-ray beam emits therefrom relating to the shape of the electron beam impinging thereon.
Claim 2
Dependent Claim
122 words
An X-ray source for generating an X-ray pattern having a plurality of selectable sectional shapes comprising: A. an electron gun for producing an electron beam; B. a condenser lens comprising two coils, first, second and third pole pieces, the polarities of said first and third pole pieces being arranged opposite that of the second, such that the electron beam is not substantially rotated passing through the lens; C. means including an astigmator lens placed between said gun and condenser lens for shaping the electron beam into at least two distinct shapes; D. a target on which said beam is focused by said condenser lens, such that a shaped X-ray beam emits therefrom relating to the shape of the electron beam impinging thereon.
Claim 3
Dependent Claim
19 words
An X-Ray source according to claim 1 wherein said astigmator comprises four electrodes connected to a power supply source.
Claim 4
Dependent Claim
19 words
An X-ray source according to claim 1 wherein said astigmator comprises four electromagnets connected to a power supply source.
Claim 5
Independent Claim
158 words
An apparatus for generating an X-ray pattern having a plurality of selectable sectional shapes comprising: A. a vacuum chamber; B. a nozzle, having a minute opening, said nozzle being connected to said chamber; C. a vacuum pump for exhausting the air entering the opening of said nozzle; D. an electron gun for producing an electron beam; E. a condenser lens for focusing said beam so as to pass through the opening of said nozzle, comprising two coils, first, second and third pole pieces, the polarity of said first and third pole pieces being arranged opposite that of the second such that the electron beam is not substantially rotated; and, F. means including an astigmator lens placed between said gun and said lens, for varying the sectional shape of the electron beam passed through the opening of said nozzle, such that said beam may irradiate a specimen to generate an X-ray relating to the shape of the electron beam.
Claim 6
Independent Claim
158 words
An apparatus for generating an X-ray pattern having a plurality of selectable sectional shapes comprising: A. a vacuum chamber; B. a nozzle, having a minute opening, said nozzle being connected to said chamber; C. a vacuum pump for exhausting the air entering the opening of said nozzle; D. an electron gun for producing an electron beam; E. a condenser lens for focusing said beam so as to pass through the opening of said nozzle, comprising two coils, first, second and third pole pieces, the polarity of said first and third pole pieces being arranged opposite that of the second such that the electron beam is not substantially rotated; and, F. means including an astigmator lens placed between said gun and said lens, for varying the sectional shape of the electron beam passed through the opening of said nozzle, such that said beam may irradiate a specimen to generate an X-ray relating to the shape of the electron beam.
References Cited (Backward Citations)
US2866902A
Cited
US2824232A
Cited
US2849634A
Cited
US2919381A
Cited
US3028491A
Cited
US2944175A
Cited
US3376449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |