DE394364C - Process for generating particularly sharp X-ray images - Google Patents

Process for generating particularly sharp X-ray images

Info

Publication number
DE394364C
DE394364C DEP36575D DEP0036575D DE394364C DE 394364 C DE394364 C DE 394364C DE P36575 D DEP36575 D DE P36575D DE P0036575 D DEP0036575 D DE P0036575D DE 394364 C DE394364 C DE 394364C
Authority
DE
Germany
Prior art keywords
focus
ray
ray images
particularly sharp
cathode
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
Application number
DEP36575D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JOSEF ROSENTHAL DR
Original Assignee
JOSEF ROSENTHAL DR
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JOSEF ROSENTHAL DR filed Critical JOSEF ROSENTHAL DR
Priority to DEP36575D priority Critical patent/DE394364C/en
Application granted granted Critical
Publication of DE394364C publication Critical patent/DE394364C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J35/00X-ray tubes
    • H01J35/02Details
    • H01J35/04Electrodes ; Mutual position thereof; Constructional adaptations therefor

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Description

Verfahren zur Erzeugung besonders scharfer Röntgenbilder. Durch geeignete Bemessung und Anordnung der Elektroden einer Röntgenröhre ist man in der Tage, die Auftreffstelle der Kathodenstrahlen auf der Antikathode (Fokus) außerordentlich klein zu erhalten und damit schärfste Röntgenbilder zu erzielen. Da ,jedoch die Energie, welche den Kathodenstrahlen bei zinigermaßen intensiven Strömen innewohnt, sehr groß ist, kann der Fokus nicht beliebig klein gewählt wenden, weil sonst die Antikathode - selbst bei Verwendung sehr schwer schmelzbarer 'Metalle - sofort an.geschmolzen werden würde.Process for generating particularly sharp X-ray images. Through suitable Dimensioning and arrangement of the electrodes of an X-ray tube is one in the days that The point of impact of the cathode rays on the anticathode (focus) is extraordinary to keep it small and thus to achieve the sharpest X-ray images. There, however Energy which is inherent in the cathode rays in the case of somewhat intense currents, is very large, the focus cannot be arbitrarily small, because otherwise the Anticathode - even when using very difficult to melt metals - melted on immediately would be.

Versuche haben nun ergeben, daß es möglich ist, schärfste Röntgenbilder zu erhalten, ohne daß ein Einschmelzen der Antikathode eintritt, und zwar auch bei Verwendung relativ starker Ströme. Diese Möglichkeit besteht darin, daß man einen linienartigen Fokus erzeugt. Alle ganz oder nahezu in Richtung dieser Linie projizierten Gebilde werden nun ebenso odernahezu ebenso scharf erscheinen, als wenn der Fokus ein Punkt wäre. In Wirklichkeit ist natürlich weder ein punktförmiger noch ein linienartiger Fokus ausführbar, dagegen läßt sich sehr wohl ein einer Linie sich näherndes langes Rechteck von kleiner Schmalseite erzielen. Da die Kathodenstrahlen bei einem derartigen Fokus aber in relativ großer Fläche die Antikathotde treffen, ist ein Einbrennen :der letzteren leicht zu vermeiden.Experiments have now shown that it is possible to get the sharpest X-ray images to be obtained without the anticathode melting down, even with Use of relatively strong currents. This possibility is that one generated line-like focus. All or nearly all projected in the direction of this line Forms will now appear just as or almost as sharp as if the focus would be a point. In reality, of course, it is neither punctiform nor linear Focus can be carried out, on the other hand a long one approaching a line can very well be possible Achieve a rectangle from the small narrow side. Since the cathode rays at such The focus, however, in a relatively large area that the antique cathots hit is a burn-in : the latter easy to avoid.

Um einen Fokus zu erhalten, ,der sich einer Linie möglichst nähert, verringert man den Querschnitt des Kathodenstrahlenbündels möglichst stark und läßt letzteres unter möglichst spitzem Winkel auf die Antikathodenfläche fallen. Bei den bisherigen Röntgenröhren wurde dieser Winkel gewöhnlich gleich q.5° gewählt. Ein solcher Neigungswinkel kann natürlich das .durch die Erfindung gekennzeichnete Resultat nicht ergeben.To get a focus that comes as close as possible to a line, the cross-section of the cathode ray beam is reduced as much as possible and left the latter fall onto the anticathode surface at an acute angle as possible. at In the previous X-ray tubes, this angle was usually chosen equal to 5 °. Such an angle of inclination can of course be that characterized by the invention Result not yielded.

Zur Ausführung des vorbeschriebenen Verfahrens ist eine Röntgenröhre zu verwenden, «-elche anders gebaut sein muß als die bisher üblichen. Abgesehen davon, daß das Kathodenstrahlenbündel an der Stelle, an welcher es die Antikathode trifft, sehr geringen Querschnitt besitzt, muß der Winkel der Kathodenachse mit der Fläche der Antikathode ein möglichst spitzer sein. Außerdem ist aber auch dafür zu sorgen, daß die ganz oder nahezu in Richtung der Fokuslinie austretenden Röntgenstrahlen praktisch verwendet werden können; es dürfen also in dieser Richtung oder in deren Um-1.ebung keine Ansätze an der Röntgenröhre vorhanden sein, welche bei Verwendung :des gewünschten Röntgenstrahlenbündels hinderlich wären.An X-ray tube is used to carry out the method described above to use "-which must be built differently than the hitherto customary ones. Apart from that from the fact that the cathode ray beam at the point at which it is the anticathode meets, has a very small cross-section, the angle of the cathode axis must be the surface of the anticathode should be as pointed as possible. But it is also for it to ensure that the X-rays exiting completely or almost in the direction of the focus line can be used practically; So it may be in this direction or in theirs In order to avoid any attachments to the X-ray tube, which would occur when using : the desired X-ray beam would be a hindrance.

Claims (1)

PATENT-ANsPRÜCHE: i. Verfahren zur Erzeugung besonders scharfer Röntgenbilder durch Verwendung einer Röntgenröhre, ,deren Elektroden so bemessen und angeordnet sind, daß das auf die Antikathode treffende Kathod:enstrahlbündel sehr geringen Querschnitt besitzt, dadurch gekennzeichnet, daß die Elektroden so angeordnet sind, daß der Winkel zwischen Antikathodenfläche und Kathodenstrahlbündel sehr spitz ist und das benutzte Röntgenstrahlbündel in der Richtung des Iinienartigen Fokus oder in einer wenig davon abweichenden Richtung austritt. a. Röntgenröhre nach Anspruch i, dadurch gekennzeichnet, daß die Glaswandung in Richtung des linienartigen Fokus oder in der Nähe dieser Richtung keinen Ansatz besitzt, so daß in dieser Richtung die Röntgenstrahlen praktisch benutzt werden können.PATENT CLAIMS: i. Process for generating particularly sharp X-ray images by using an X-ray tube, whose electrodes are sized and arranged are that the cathode ray bundle hitting the anticathode is very small Has cross-section, characterized in that the electrodes are arranged so that the angle between the anti-cathode surface and the cathode ray beam very is pointed and the X-ray beam used is in the direction of the line-like Focus or in a slightly different direction. a. X-ray tube according to claim i, characterized in that the glass wall in the direction of the line-like Focus or in the vicinity of this direction has no approach, so that in this direction the X-rays can be put to practical use.
DEP36575D 1918-03-26 1918-03-26 Process for generating particularly sharp X-ray images Expired DE394364C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP36575D DE394364C (en) 1918-03-26 1918-03-26 Process for generating particularly sharp X-ray images

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP36575D DE394364C (en) 1918-03-26 1918-03-26 Process for generating particularly sharp X-ray images

Publications (1)

Publication Number Publication Date
DE394364C true DE394364C (en) 1924-04-17

Family

ID=7374850

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP36575D Expired DE394364C (en) 1918-03-26 1918-03-26 Process for generating particularly sharp X-ray images

Country Status (1)

Country Link
DE (1) DE394364C (en)

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