[go: up one dir, main page]

DE660874C - Fluorescent screen, especially for X-ray examinations - Google Patents

Fluorescent screen, especially for X-ray examinations

Info

Publication number
DE660874C
DE660874C DE1930660874D DE660874DD DE660874C DE 660874 C DE660874 C DE 660874C DE 1930660874 D DE1930660874 D DE 1930660874D DE 660874D D DE660874D D DE 660874DD DE 660874 C DE660874 C DE 660874C
Authority
DE
Germany
Prior art keywords
fluorescent screen
light
sharpness
ray examinations
characters
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
DE1930660874D
Other languages
German (de)
Inventor
Dr Joseph Hartmann
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.)
Siemens Reiniger Werke AG
Original Assignee
Siemens Reiniger Werke AG
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 Siemens Reiniger Werke AG filed Critical Siemens Reiniger Werke AG
Application granted granted Critical
Publication of DE660874C publication Critical patent/DE660874C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21KTECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K4/00Conversion screens for the conversion of the spatial distribution of X-rays or particle radiation into visible images, e.g. fluoroscopic screens

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Conversion Of X-Rays Into Visible Images (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Description

Fluoreszenzschirm, insbesondere für Untersuchungen mittels Röntgenstrahlen Bei vier Herstellung von Riintgenstrahlenbildern werden zwecks Verkürzung der Beiichtun ,szeit bei der Aufnahme, wie bekannt, Verstärkungsschirme benutzt. Bei der Herstellung dieser Schirme war man bestrebt, eine möglichst gute Lichtausbeute und damit eigen möglichst günstigen Verstärkungsfaktor zu erhalten. Daß bei Anwendung solcher Verstärkungsschirnne die Zeichenschärfe gegenüber der bei Aufnahmen ohne Verstärkungsschirm erreichbaren Zeichenschärfe sich wesentlich verschlechterte, nahm man als einen nicht zu vermeidenden Nacliteil dieser Schirme mit in Kauf.Fluorescent screen, in particular for X-ray examinations In the case of four production of X-ray images, in order to shorten the report As is known, intensifying screens are used when recording. In the preparation of The aim of these screens was to achieve the best possible light output and thus their own to get the lowest possible gain factor. That with the use of such reinforcement cords the sharpness of the characters compared to that which can be achieved when taking pictures without an intensifying screen Sharpness of characters deteriorated significantly, was taken as unavoidable Nacli part of these umbrellas in purchase.

Dieser Mangel an Zeichenschärfe ist belanntiich vor allem darauf zurückzuführen. daß das von den einzelnen Kristallen nach allen Seiten ausgehende Licht teilweise die hchtempfindliche Schicht erst nach ein- oder n.ehrmali@er Reflexion an benachbarten Kris:ailen oder an der Rückseite der Folie err-eicht.This lack of sharpness is known to be mainly due to this. that some of the light emanating from the individual crystals in all directions the highly sensitive layer only after one or more reflection at neighboring Kris: ailen or at the back of the slide.

Die vorliegende Erfindung beruht auf die-_ @:- Erket,ntnis der Ursachen für den Mangel ._:: Zeichenschärfe und besteht darin, daß das c:as Diid verschleiernde. gestreute oder reflektier te Licht möerlichst vernichtet oder seine Auabreitung möglichst vermieden wird. Dies geschieht in der Weise. daß die fluoreszicre.^.de Schicht angefärbt wird, und zwar ent-@,.;-der durchgehend oder nur zum Teil, etwa schichtweise. Zwar wird auch in diesem Fall die Verstärkungswirkung verringert, die Zeichenschärfe jedoch wesentlich verbessert. Zum Anfärben benutzt man mit Vorteil entweder schwarze oder andere das Licht des Schirmes genügend absorbierende Stoffe, die man zweckmäßigenveise dein Bindemittel für die Leuchtmasse vor der Verarbeitung Qntweder in fester .oder gelöster Form zusetzt. Man erhält mit solchen Folien auch bei größerer Schichtstärke Negative mit ausgeprägt guten Schärfedetails, die sich kaum von solchen unterscheiden, die man ohne Anwendung der Folien :erzielt.The present invention is based on the knowledge of the causes for the deficiency ._ :: sharpness of characters and consists in the fact that the c: as diid veils. scattered or reflected light is destroyed as much as possible or its spread is avoided as much as possible. It does so in that way. that the fluoreszicre. ^. de Layer is colored, namely ent - @ ,.; - which is continuous or only partially, for example in layers. Although the reinforcing effect is also reduced in this case, however, the sharpness of the characters is significantly improved. It is advantageous to use it for coloring either black or other substances that sufficiently absorb the light of the screen, which one expediently your binder for the luminous material before processing Q either in solid or dissolved form adds. One also obtains with such films If the layer is thicker, there are negatives with very good sharpness details can hardly be distinguished from those that can be achieved without using the foils.

Durch Anwendung extrem dünner Schichten, z. B. von o,o.l bis o,oS mm Dicke, kann man die Unschärfe der Verstärkungsfolien noch weiter beseitigen. Die Folie verliert zwar etwas an Verstärkungswirkung, sie behält aber ihre Eigenschaft bei, noch ganz wesentliche Abkürzungen der Belichtungszeit zu ermöglichen. Man erhält also bei der Anwendung solcher Folien, bei welchen man bewußt auf das Optimum an Verstärkungswirkung verzichtet, bei .etwas verlängerter Belichtung wesentlich schärfer gezeichnete \ egative. Bei Verwendung von Folien für die Doppelfilmtechnik müssen natürlich zwei Folien angewandt werden, die hinsichtlich der Dicke die angegebenen Maße nicht überschreiten. Ebenso wie bei den Verstärkun`;sschirmen ';1111l auch die Zeichenschärfe voti Leucht- schirmeil verbessert werden. By using extremely thin layers, e.g. B. from o, ol to o, oS mm thickness, you can eliminate the blurring of the reinforcing foils even further. Although the film loses some of its reinforcing effect, it retains its property of still allowing significant shortening of the exposure time. Thus, when using such films, in which one deliberately renounces the optimum in reinforcement effect, with a slightly longer exposure one obtains significantly more sharply drawn \ egatives. When using foils for the double film technique, of course, two foils must be used that do not exceed the specified dimensions in terms of thickness. As is the case with the amplification screens '; 1111l also the sharpness of the characters voti luminous schirmeil can be improved.

Claims (1)

P_1TI;NT_1\SPRÜCIIE:
i. Fluoreszenzschirm, insbesondere für Untersuchungen mittels Röntgenstrahlen, i dadurch gekennzeichnet, daß das die Zeichenschärfl@e°intr-,ichti@ende reilelc- . tierte Fluoreszeilzlicht der aktiven (Leucht-) Schicht durch ganzes oder teilweises An-
färben der aktiven Schicht mit elllem das von ihr ausgehende Licht absorbierend-ti Farbstoff und,/oder durch ganzes oder teilweises Anfärben-des Bindemittels, in das die aktive Substanz eingebettet ist, mit einem das von dieser Subtanz ausgehende Licht absorbierenden Farbstoff vermindert wird. c. Fluoreszenzschirm nach Anspruch r, dadurch gelcennzeichilet, (Iah die Dicicc der aktiven Schicht weniger als 0,1 Inin beträgt.
P_1TI; NT_1 \ SPRÜCIIE:
i. Fluorescent screen, especially for X-ray examinations, i characterized in that the the Sharpness of characters @ e ° intr-, ichti @ end reilelc-. controlled fluorescent light of the active (luminous) Shift through full or partial
color the active layer with elllem the light-absorbing dye emanating from it and / or by wholly or partially coloring the binding agent in which the active substance is embedded, with a dye which absorbs the light emanating from this substance. c. Fluorescent screen according to claim r, characterized in that it is characterized (Iah the thickness of the active layer is less than 0.1 inin).
DE1930660874D 1930-05-25 1930-05-25 Fluorescent screen, especially for X-ray examinations Expired DE660874C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE660874T 1930-05-25

Publications (1)

Publication Number Publication Date
DE660874C true DE660874C (en) 1938-06-04

Family

ID=6587694

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1930660874D Expired DE660874C (en) 1930-05-25 1930-05-25 Fluorescent screen, especially for X-ray examinations

Country Status (1)

Country Link
DE (1) DE660874C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743340C (en) * 1941-04-01 1943-12-23 Jur Karl Staiger Dr Fluorescent screen for X-rays
DE1039361B (en) * 1956-09-29 1958-09-18 Standard Elektrik Lorenz Ag Luminescent screen
DE2801647A1 (en) * 1977-01-17 1978-07-27 Dainippon Toryo Kk RADIOGRAPHIC AMPLIFIER SCREEN

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743340C (en) * 1941-04-01 1943-12-23 Jur Karl Staiger Dr Fluorescent screen for X-rays
DE1039361B (en) * 1956-09-29 1958-09-18 Standard Elektrik Lorenz Ag Luminescent screen
DE2801647A1 (en) * 1977-01-17 1978-07-27 Dainippon Toryo Kk RADIOGRAPHIC AMPLIFIER SCREEN

Similar Documents

Publication Publication Date Title
DE2755381A1 (en) IMAGE CONVERTER AND LUMINAIRE MADE OF RARE EARTH METAL OXYHALOGENIDES FOR USE THEREOF
DE2137327A1 (en) Filters to increase the contrast in display devices
DE2614305A1 (en) Fluorescent screen
DE660874C (en) Fluorescent screen, especially for X-ray examinations
DE2161958A1 (en) Phosphors made from rare earth oxyhalides
DE2300928A1 (en) X-RAY CONVERSION SCREENS
DE1017464B (en) Process for the production of double-sided coated X-ray films
DE431750C (en) Lighting device
DE2651219A1 (en) TRANSLUCENT PROJECTION SCREEN
DE1151601B (en) Optical light amplifier for selective fluorescence
AT136106B (en) Fluorescent screen, in particular for X-ray examinations.
DE760884C (en) Luminous screen for Braun tubes
US2088595A (en) Fluorescent screen
AT300401B (en) Anti-reflective coating
Buettner-Janusch Use of infrared photography in archaeological field work
DE705341C (en) Image carrier for three-dimensional lenticular images
DE668734C (en) Fluorescent screen
DE588547C (en) Luminographic process
DE1764329C3 (en) Solid-state image storage, in particular for use with X-rays as excitation radiation
DE744568C (en) Device for mapping the intensity distribution in a bundle of beams of slow neutrons, especially for mapping objects using slow neutrons
DE700512C (en) Light source, which emits light in the visible range with a continuous spectrum of constant energy for each wavelength
DE975763C (en) Luminescent screen for X-rays
DE567677C (en) Device for inertia-free photographic recording of acoustic vibrations on a light-sensitive carrier, in particular for sound films
AT147578B (en) Color camera for simultaneous recording of several partial images.
DE700695C (en) Arrangement for the photographic recording of sound events