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DE952740C - Device for determining image wandering in an electron microscope - Google Patents

Device for determining image wandering in an electron microscope

Info

Publication number
DE952740C
DE952740C DEV6294A DEV0006294A DE952740C DE 952740 C DE952740 C DE 952740C DE V6294 A DEV6294 A DE V6294A DE V0006294 A DEV0006294 A DE V0006294A DE 952740 C DE952740 C DE 952740C
Authority
DE
Germany
Prior art keywords
electron microscope
wandering
image
determining image
color
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
DEV6294A
Other languages
German (de)
Inventor
Lothar Schmidt
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.)
Jenoptik AG
Original Assignee
VEB Carl Zeiss Jena GmbH
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 VEB Carl Zeiss Jena GmbH filed Critical VEB Carl Zeiss Jena GmbH
Priority to DEV6294A priority Critical patent/DE952740C/en
Application granted granted Critical
Publication of DE952740C publication Critical patent/DE952740C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/22—Optical, image processing or photographic arrangements associated with the tube
    • H01J37/224—Luminescent screens or photographic plates for imaging; Apparatus specially adapted therefor, e. g. cameras, TV-cameras, photographic equipment or exposure control; Optical subsystems specially adapted therefor, e. g. microscopes for observing image on luminescent screen

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Measurement Of Radiation (AREA)

Description

Bei der photographischen Aufnahme eines von einem Elektronenmikroskop entworfenen elektronenoptischen Bildes darf, da mit verhältnismäßig langer Belichtungszeit gearbeitet werden muß, die Belichtung des Aufnahmematerials nur dann erfolgen, wenn das Bild einwandfrei feststeht. Es muß daher vor der Aufnahme auf dem Leuchtschirm beobachtet werden, ob kein Bildwandern auftritt. Die Beurteilung des Bildwanderns ist jedoch mitunter schwierig, da die Bildschärfe beim Wandern des Bildes auf dem Leuchtschirm erhalten bleibt.When taking a photograph of one of an electron microscope designed electron-optical image, because with a relatively long exposure time must be worked, the exposure of the recording material will only take place if the picture is perfectly established. It must therefore be displayed on the fluorescent screen before recording observed that no image wandering occurs. Assessing the image wandering is sometimes difficult, however, because the image sharpness as the image wanders on the Luminous screen is retained.

Die Erfindung betrifft eine Einrichtung, mit deren Hilfe eine einwandfreie Feststellung des Bildwanderns auf einfache Weise ermöglicht wird. Gemäß der Erfindung wird hierzu ein Leuchtschirm verwendet, bei dem der größere Teil seiner Oberfläche mit normaler Fluoreszenz;farbe belegt ist, während auf dem restlichen Teil Leuchtfarbe mit starker Nachleuchtwirkung aufgebracht ist. Bei einem derartig ausgebildeten Leuchtschirm macht sich das Bildwandern durch Unschärfe in der mit Nachleuchtfarbe belegten Zone bemerkbar. Es ist vorteilhaft, diese Zone an den Rand des Leuchtschirms zu legen, um bei Betrachtung von Bildern, von denen keine photographische Aufnahmen gemacht werden ' sollen, den Bildeindruck nicht zu stören. Dadurch, daß das elektronenoptische Bild beide Leuchtfarbengebiete bedeckt, tritt der Unterschied in der Bildschärfe der beiden Zonen bei einem Wandern des Bildes deutlich in Erscheinung. Außerdem wird beim Bildwandern eine Kontrast v erschlechterung in der mit Nachleuchtfarbe beleg ten Zone des Bildschirmes hervorgerufen, die gleichfalls zur guten Erkennbarkeit des Bildwanderns beiträgt.The invention relates to a device with the help of which a faultless Detection of image wandering is made possible in a simple manner. According to the invention a fluorescent screen is used for this, in which the greater part of its surface with normal fluorescence; color is covered, while luminous color on the remaining part is applied with a strong afterglow effect. With such a trained Fluorescent screen makes the image wander through blurring in the afterglow color occupied zone noticeable. It is advantageous to place this zone on the edge of the fluorescent screen to lay down when viewing pictures, none of which are photographic recordings should be made 'so as not to disturb the impression of the picture. Because the electron-optical If the image covers both luminous color areas, the difference occurs in the image sharpness of the two zones are clearly visible when the image is wandering. aside from that a contrast deterioration in the afterglow color occurs when moving the image occupied zone of the screen, which is also good for recognizability of image wandering contributes.

In der Abbildung ist schematisch ein Ausführungsbeispiel der Erfindung veranschaulicht. Sie zeigt die Oberfläche eines kreisrunden Bildschirmes, deren innerer, gleichfalls kreisförmiger Teil i mit normaler Fluoreszenzfarbe belegt ist. Auf der ringförmigen Randzone 2 des Leuchtschirmes befindet sich dagegen eine Leuchtfarbe, die starke Nachleuchtwirkung besitzt.In the figure is a schematic embodiment of the invention illustrated. It shows the surface of a circular screen, whose inner, likewise circular part i is covered with normal fluorescent color. On the other hand, there is a luminous color on the ring-shaped edge zone 2 of the fluorescent screen, has a strong afterglow effect.

Claims (2)

PATENTANSPRÜCHE:. i. Einrichtung zur Feststellung des Bildwanderns beim Elektronenmikroskop, dadurch gekennzeichnet, daß der größere Teil der Oberfläche des Endbildleuchtschirmes mit normaler Fluoreszenzfarbe belegt ist, während auf dem restlichen Teil Leuchtfarbe mit starker Nach-Leuchtwirkung aufgebracht ist. PATENT CLAIMS :. i. Device for detecting image wandering in the electron microscope, characterized in that the greater part of the surface of the end screen is covered with normal fluorescent color, while the remaining part is applied with luminous color with a strong after-luminous effect. 2. Einrichtung nach Anspruch i, dadurch gekennzeichnet, daß der mit Nachleuchtfarbe belegte Teil sich am Rande des Leuchtschirmes befindet. In Betracht gezogene Druckschriften: Deutsche Patentschrift Nr. 874 497; schweizerische Patentschrift Nr. 229 054.2. Device according to claim i, characterized in that the part covered with afterglow paint is located on the edge of the luminescent screen. Documents considered: German Patent No. 874 497; Swiss patent specification No. 229 054.
DEV6294A 1953-09-20 1953-09-20 Device for determining image wandering in an electron microscope Expired DE952740C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV6294A DE952740C (en) 1953-09-20 1953-09-20 Device for determining image wandering in an electron microscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV6294A DE952740C (en) 1953-09-20 1953-09-20 Device for determining image wandering in an electron microscope

Publications (1)

Publication Number Publication Date
DE952740C true DE952740C (en) 1956-11-22

Family

ID=7571541

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV6294A Expired DE952740C (en) 1953-09-20 1953-09-20 Device for determining image wandering in an electron microscope

Country Status (1)

Country Link
DE (1) DE952740C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1187334B (en) * 1960-01-07 1965-02-18 Tesla Np Screen for electron optical devices

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH229054A (en) * 1941-02-12 1943-09-30 Loewe Opta Gmbh Fluorescent screen for cathode ray tubes.
DE874497C (en) * 1944-10-10 1953-04-23 Bayer Ag Process for shifting the emission color of zinc sulphide containing phosphors according to larger wavelengths

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH229054A (en) * 1941-02-12 1943-09-30 Loewe Opta Gmbh Fluorescent screen for cathode ray tubes.
DE874497C (en) * 1944-10-10 1953-04-23 Bayer Ag Process for shifting the emission color of zinc sulphide containing phosphors according to larger wavelengths

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1187334B (en) * 1960-01-07 1965-02-18 Tesla Np Screen for electron optical devices

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