DE752592C - Luminescent screen - Google Patents

Luminescent screen

Info

Publication number
DE752592C
DE752592C DEL109281D DEL0109281D DE752592C DE 752592 C DE752592 C DE 752592C DE L109281 D DEL109281 D DE L109281D DE L0109281 D DEL0109281 D DE L0109281D DE 752592 C DE752592 C DE 752592C
Authority
DE
Germany
Prior art keywords
screen
luminescent screen
glass plate
tube
light
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
DEL109281D
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.)
Opta Radio A G
Original Assignee
Opta Radio A G
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 Opta Radio A G filed Critical Opta Radio A G
Priority to DEL109281D priority Critical patent/DE752592C/en
Application granted granted Critical
Publication of DE752592C publication Critical patent/DE752592C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18Luminescent screens
    • H01J29/24Supports for luminescent material

Landscapes

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

Description

In den meisten Fällen wird der Leuchtschirm einer Kathodenstrahlröhre von der Rückseite aus betrachtet, so daß die von den Kathodenstrahlen erzeugte Lumineszenz durch die Leuchtschicht hindurchtreten muß und von ihr merklich absorbiert wird. Letzteren Nachteil kann man dadurch vermeiden, daß man in an sich bekannter Weise das Licht von der Vorderseite des Leuchtschirms benutzt, z. B. zur Betrachtung oder zur photographischen Aufzeichnung.In most cases, the fluorescent screen will be a cathode ray tube viewed from the rear, so that the luminescence generated by the cathode rays must pass through the luminous layer and is noticeably absorbed by it. The latter disadvantage can be avoided by doing in a manner known per se uses the light from the front of the fluorescent screen, e.g. B. for viewing or for photographic recording.

In diesem Falle ist es möglich, die Lichtausbeute nahezu zu verdoppeln, indem man erfindungsgemäß die Leuchtschicht auf einer spiegelnden Unterlage anbringt, zweckmäßig auf einer vorderseitig verspiegelten Glasplatte.In this case it is possible to almost double the light output, by applying the luminescent layer according to the invention to a reflective base, expediently on a glass plate mirrored on the front.

Bild i zeigt eine solche Röhre i i mit dem Leuchtschirm 12. Die Kathodenstrahlen kommen aus der Richtung des Pfeiles 13, während das Licht vom Leuchtschirm in der Richtung des Pfeiles 1.4 strahlt.Picture i shows such a tube i i with the luminescent screen 12. The cathode rays come from the direction of arrow 13, while the light from the fluorescent screen is in the Direction of arrow 1.4 radiates.

Bild 2 stellt den Querschnitt durch ein kleines Stück des Leuchtschirms dar. 21 ist die Glasplatte, 22 die Spiegelschicht (z. B. aufgedampftes Silber) und 23 die Leuchtschicht.Figure 2 represents the cross section through a small piece of the fluorescent screen 21 is the glass plate, 22 is the mirror layer (e.g. vapor-deposited silver) and 23 the luminescent layer.

Während nach Bild i der Kathodenstrahl axial in die Röhre eintritt und das Licht seitwärts austritt, zeigt Bild 3 die umgekehrte Anordnung. Beispielsweise ist eine Röhre i i dargestellt, die durch eine planparallele Glasplatte 21 abgeschlossen ist, auf welcher sich eine Metallschicht 22 und die Leuchtschicht 23 befinden. Der Kathodenstrahl 13 wird bei io erzeugt und trifft schräg auf den Bildschirm, während das Licht desselben durch die in die Röhre eingeschmolzene Linse 24 betrachtet oder auf einen Schirm entworfen wird.While according to Fig. I the cathode ray enters the tube axially and the light emerges sideways, Figure 3 shows the reverse arrangement. For example a tube i i is shown, which is closed off by a plane-parallel glass plate 21 is on which a metal layer 22 and the luminous layer 23 are located. Of the Cathode ray 13 is generated at io and strikes the screen obliquely while viewing its light through the lens 24 fused into the tube, or is designed on a screen.

Claims (1)

PATENTANSPRUCFI: Leuchtschirm für Kathodenstrahl- und Fernsehröhren, dessen Licht in bekannter Weise von derselben Seite aus betrachtet oder photographiert wird, auf die die Kathodenstrahlen treffen, dadurch gekennzeichnet, daß der Leuchtschirm auf einer vorderseitig verspiegelten Glasplatte aufgebracht ist.PATENT APPLICATION: Fluorescent screen for cathode ray and television tubes, whose light is viewed or photographed in a known manner from the same side is hit by the cathode rays, characterized in that the luminescent screen is applied to a glass plate mirrored on the front.
DEL109281D 1934-11-07 1934-11-07 Luminescent screen Expired DE752592C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEL109281D DE752592C (en) 1934-11-07 1934-11-07 Luminescent screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL109281D DE752592C (en) 1934-11-07 1934-11-07 Luminescent screen

Publications (1)

Publication Number Publication Date
DE752592C true DE752592C (en) 1954-11-22

Family

ID=7290454

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL109281D Expired DE752592C (en) 1934-11-07 1934-11-07 Luminescent screen

Country Status (1)

Country Link
DE (1) DE752592C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172779B (en) * 1959-07-30 1964-06-25 Telefunken Patent Process for two-fold, independent evaluation of a fluorescent screen image from cathode ray tubes and a device for carrying out the process
DE3924213A1 (en) * 1989-01-17 1990-07-19 Pioneer Electronic Corp LUMINESCENCE SCREEN

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172779B (en) * 1959-07-30 1964-06-25 Telefunken Patent Process for two-fold, independent evaluation of a fluorescent screen image from cathode ray tubes and a device for carrying out the process
DE3924213A1 (en) * 1989-01-17 1990-07-19 Pioneer Electronic Corp LUMINESCENCE SCREEN

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