FR2687504B1 - Perfectionnements aux tubes a rayons x. - Google Patents
Perfectionnements aux tubes a rayons x.Info
- Publication number
- FR2687504B1 FR2687504B1 FR9201621A FR9201621A FR2687504B1 FR 2687504 B1 FR2687504 B1 FR 2687504B1 FR 9201621 A FR9201621 A FR 9201621A FR 9201621 A FR9201621 A FR 9201621A FR 2687504 B1 FR2687504 B1 FR 2687504B1
- Authority
- FR
- France
- Prior art keywords
- ray tubes
- tubes
- ray
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
- H01J35/147—Spot size control
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
- H01J35/066—Details of electron optical components, e.g. cathode cups
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9201621A FR2687504B1 (fr) | 1992-02-13 | 1992-02-13 | Perfectionnements aux tubes a rayons x. |
DE4304142A DE4304142C2 (de) | 1992-02-13 | 1993-02-11 | Kathode für eine Röntgenröhre |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9201621A FR2687504B1 (fr) | 1992-02-13 | 1992-02-13 | Perfectionnements aux tubes a rayons x. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2687504A1 FR2687504A1 (fr) | 1993-08-20 |
FR2687504B1 true FR2687504B1 (fr) | 1994-04-08 |
Family
ID=9426609
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9201621A Expired - Lifetime FR2687504B1 (fr) | 1992-02-13 | 1992-02-13 | Perfectionnements aux tubes a rayons x. |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE4304142C2 (fr) |
FR (1) | FR2687504B1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19510048C2 (de) * | 1995-03-20 | 1998-05-14 | Siemens Ag | Röntgenröhre |
US7539286B1 (en) * | 2007-11-19 | 2009-05-26 | Varian Medical Systems, Inc. | Filament assembly having reduced electron beam time constant |
US7924983B2 (en) | 2008-06-30 | 2011-04-12 | Varian Medical Systems, Inc. | Thermionic emitter designed to control electron beam current profile in two dimensions |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE577796C (de) * | 1929-01-16 | 1933-06-03 | C H F Mueller Akt Ges | Gluehkathodenroentgenroehre mit mehreren getrennt voneinander angeordneten, mit Sammelvorrichtungen versehenen Kathoden, deren Elektronenbuendel auf ein und dieselbe Antikathodenflaeche auftreffen |
US3649861A (en) * | 1970-09-09 | 1972-03-14 | Picker Corp | Double focus x-ray tube |
US4315154A (en) * | 1979-11-08 | 1982-02-09 | Siemens Corporation | Multiple focus X-ray generator |
DE3001141A1 (de) * | 1980-01-14 | 1981-07-16 | Siemens AG, 1000 Berlin und 8000 München | Kathodenanordnung fuer eine roentgenroehre |
DE4026299A1 (de) * | 1990-08-20 | 1992-02-27 | Siemens Ag | Roentgenanordnung mit einem roentgenstrahler |
-
1992
- 1992-02-13 FR FR9201621A patent/FR2687504B1/fr not_active Expired - Lifetime
-
1993
- 1993-02-11 DE DE4304142A patent/DE4304142C2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE4304142C2 (de) | 1994-09-29 |
FR2687504A1 (fr) | 1993-08-20 |
DE4304142A1 (en) | 1993-08-19 |
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