DE910453C - Braun tubes for measuring purposes - Google Patents

Braun tubes for measuring purposes

Info

Publication number
DE910453C
DE910453C DET5217D DET0005217D DE910453C DE 910453 C DE910453 C DE 910453C DE T5217 D DET5217 D DE T5217D DE T0005217 D DET0005217 D DE T0005217D DE 910453 C DE910453 C DE 910453C
Authority
DE
Germany
Prior art keywords
measuring purposes
braun tubes
piston crown
braun
matting
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
DET5217D
Other languages
German (de)
Inventor
Erich Neubauer
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.)
Telefunken AG
Original Assignee
Telefunken 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 Telefunken AG filed Critical Telefunken AG
Priority to DET5217D priority Critical patent/DE910453C/en
Application granted granted Critical
Publication of DE910453C publication Critical patent/DE910453C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/20—Cathode-ray oscilloscopes
    • G01R13/202—Non-electric appliances, e.g. scales, masks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/34—Luminescent screens provided with permanent marks or references

Description

Braunsche Röhre für Meßzwecke Es wurde bereits eine Meßanordnung mit einer Braunschen Röhre vorgeschlagen, bei der das optische Abbild einer Skalenteilung oder das Abbild einer Beschriftung mit Hilfe eines Projektors von außen oder von innen her auf der Leuchtschicht an der Innenseite des Kolbenbodens entworfen wird.Braun tube for measuring purposes There was already a measuring arrangement with a Braun tube proposed in which the optical image of a scale division or the image of a lettering with the help of a projector from the outside or from is designed on the inside of the luminescent layer on the inside of the piston crown.

In der Praxis hat sich gezeigt, daß. bei der Projektion von rückwärts her, die zweckmäßig durch ein im konischen Teil des IBraunschen Rohres angebrachtes Fenster aus optisch einwandfreiem Glas erfolgt, die Dicke der Leuchtschicht oft nicht mehr genügt, um ein Durchscheinen der zur Projektion benutzten Lichtquelle zu verhindern. In practice it has been shown that. when projecting from behind here, which is expediently attached to the conical part of the brown tube Windows are made of optically perfect glass, the thickness of the luminous layer often is no longer sufficient for the light source used for projection to shine through to prevent.

Hierdurch wird die Ablesung erschwert.This makes reading difficult.

Gemäß der Erfindung wird vorgeschlagen, bei dieser Art der Projektion den Kolbenboden der Braunschen Röhre vor Aufbringen der Leuchtschicht an der Innenseite auf chemischem oder mechanischem Wege zu mattieren. Dadurch wird die Transparenz des Kolbenbodens so weit vermindert, daß die Projektionslichtquelle nicht mehr störend durch den Schirm hindurch wahrnehmbar ist. According to the invention it is proposed in this type of projection the piston crown of the Braun tube before applying the luminescent layer on the inside to mattify chemically or mechanically. This will increase the transparency of the piston crown reduced so much that the projection light source is no longer disturbing is perceptible through the screen.

Die Mattierung des Kolbenbodens kann nach irgendeinem zur Glasmattierung bekannten Verfahren erfolgen, beispiel,sweise auf mechanischem Wege durch Behandlung desselben mit einem Sandstrahlgebläse oder einem anderen die Oberfläche aufrauhenden Mittel (Schleifverfahren) oder aber auf chemischem Wege durch Ätzung des Glases mit Flußsäure oder mit gelösten Flußsäuresalzen. The matting of the piston crown can be done in any way for matting the glass known processes take place, for example, by mechanical means by treatment the same with a sandblasting blower or other roughen the surface Medium (grinding process) or by chemical means by etching the glass with hydrofluoric acid or with dissolved hydrofluoric acid salts.

Auch ist es möglich. eine dünne trübe Zwischen- schicht zwischen dem Kolbenboden und der Leuchtschicht vorzusehen.It is also possible. a thin, cloudy intermediate layer to be provided between the piston crown and the luminous layer.

Claims (1)

PATENTANSPRUCH: Braunsche Röhre für Meßzwecke, bei der das optische Abbild einer Skalenteilung oder einer -Beschriftung mit Hilfe eines Projektors von innen her auf der Leuchtschicht an der Innenseite des Kolbenbodens entworfen wird. dadurch gekennzeichnet, daß der Kolbenboden mit einer vor dem Aufbringen der Leuchtschicht auf chemischem oder mechanischem Wege vorgenommenen Mattierung versehen ist. PATENT CLAIM: Braun tube for measuring purposes in which the optical Image of a scale division or a lettering with the help of a projector from is designed on the inside of the luminescent layer on the inside of the piston crown. characterized in that the piston head with a before the application of the luminous layer is provided with a chemically or mechanically made matting.
DET5217D 1941-01-23 1941-01-23 Braun tubes for measuring purposes Expired DE910453C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DET5217D DE910453C (en) 1941-01-23 1941-01-23 Braun tubes for measuring purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET5217D DE910453C (en) 1941-01-23 1941-01-23 Braun tubes for measuring purposes

Publications (1)

Publication Number Publication Date
DE910453C true DE910453C (en) 1954-05-03

Family

ID=7544927

Family Applications (1)

Application Number Title Priority Date Filing Date
DET5217D Expired DE910453C (en) 1941-01-23 1941-01-23 Braun tubes for measuring purposes

Country Status (1)

Country Link
DE (1) DE910453C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972877C (en) * 1952-10-28 1959-10-22 Bendix Aviat Corp Process for the production of a transparency for the projection of reference characters and lines on a screen within a cathode ray tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972877C (en) * 1952-10-28 1959-10-22 Bendix Aviat Corp Process for the production of a transparency for the projection of reference characters and lines on a screen within a cathode ray tube

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