DE411484C - Method for producing bright field lighting in the presence of dark field lighting - Google Patents

Method for producing bright field lighting in the presence of dark field lighting

Info

Publication number
DE411484C
DE411484C DEO13779D DEO0013779D DE411484C DE 411484 C DE411484 C DE 411484C DE O13779 D DEO13779 D DE O13779D DE O0013779 D DEO0013779 D DE O0013779D DE 411484 C DE411484 C DE 411484C
Authority
DE
Germany
Prior art keywords
field lighting
lighting
dark field
producing bright
dark
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
DEO13779D
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.)
F W OELZE DR
Original Assignee
F W OELZE 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 F W OELZE DR filed Critical F W OELZE DR
Priority to DEO13779D priority Critical patent/DE411484C/en
Application granted granted Critical
Publication of DE411484C publication Critical patent/DE411484C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B21/00Microscopes
    • G02B21/06Means for illuminating specimens
    • G02B21/08Condensers
    • G02B21/12Condensers affording bright-field illumination
    • G02B21/125Condensers affording bright-field illumination affording both dark- and bright-field illumination

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

Verfahren zum Herstellen einer Hellfeldbeleuchtung beim Vorhandensein einer Dunkelfeldbeleuchtung. Beim Mikroskopieren mit Dunke17feldbeleuchtung wird häufig die Forderung gestellt, daß während der Beobachtung ein Übergang zur Hellfeldbeleuchtung vorgenommen werden kann.Method for producing bright field lighting in the presence a dark field illumination. When using a microscope with dark field illumination often the requirement is that a transition to bright field illumination during observation can be made.

Es sind Einrichtungen, die den Wechsel dieser beiden Beleuchtungsarten in einer einfachlen Weise gestatten, an sich bekannt. Nach der Erfindung soll der Wechsel dadurch erzielt werden, daß man zwischen den für Dunkelfeldbeleuchtung eingerichteten Kondensor und das Objekt eine lichtVerstreuende Platte (Milchglas, Mattscheibe, mattierten Film, Farbglas o. dgl.) einschaltet. Es wird dadurch unter dem Objekt eine gleichmäßig selbstleuchtende Fläche geschaffen,, was übrigens an sich, aber nicht zu dem Zwecke des Übergangs von der einen Beleuchtungsart zur anderen, bekannt war.There are facilities that allow the alternation of these two types of lighting allow in a simple way, known per se. According to the invention, the Alternation can be achieved by switching between those set up for dark field lighting Condenser and the object a light-diffusing plate (frosted glass, ground glass, matted film, colored glass or the like) turns on. It will be under the object created an evenly self-luminous surface, which, by the way, in itself, but not known for the purpose of transition from one type of lighting to another was.

fJ,b@er die Art, wie der Wechsel in Beleuchtung zustande kommt, gibt die Zeichnung Aufschluß. In Abb. i ist der Strahlengang schematisch dargestellt, wie er bei der Dunkelfeldbeleuchtung vorhanden sein muß; man erkennt, daß selbst bei Vorhandensein einer Immersion zwischen Objekt und Objektiv die beleuchtenden Büschel die Öffnung des Objektives nicht erreichen, und daß nur solche Strahlen in dieses gelangen können, die an dem zu beobachtenden Objekt abgeheugt werden. Führt man, wie dies in Abb. 2 dargestellt ist, in den Strahlengang, der Dunkelfeldbeleuchtung zwischen Kondenso.r und Objekt ein zerstreuendes Mittel ein, dann wird der oben beschriebene Strahlengang völlig zerstört, weil nunmehr die Strahlen nach allen Richtungen hin das Objekt durchsetzen und ein Teil derselben das Objektiv direkt erreicht. Es wird also durch dieses einfache Mittel der Strahlengang hergestellt, wie er bei der Hellfeldbeleuchtung üblich und notwendig ist. Diese so erzeugte Hell feldbeleuchtung ist so gut, daß auch ein nicht abgeblendetes Immersionsobjektiv in seiner ganzen Öffnung von abbildenden Strahlen erfüllt .wird.fJ, b @ er the way the change in Lighting comes, the drawing provides information. In Fig. I the beam path is schematic shown how it must be present in dark field lighting; one recognises, that even in the presence of an immersion between object and lens the illuminating Tufts do not reach the opening of the lens, and that only such rays can get into this, which can be deduced from the object to be observed. If you lead, as shown in Fig. 2, into the beam path, the dark field illumination between the condenser and the object there is a dispersing medium, then the one above beam path described completely destroyed because now the rays after all In the direction of the object, a part of it penetrates the lens directly achieved. The beam path is thus established by this simple means, as is usual and necessary with bright field lighting. This Hell created in this way Field lighting is so good that an immersion lens that is not stopped down can be used is filled with imaging rays in its entire opening.

Es kommt noch dazu, daß im allgemeinen bei den bekannten Einrkh'tungen, die für den abwechselnden Gebrauch der Hell- und Dunkelbeleuchtung bestimmt sind, stets noch Vorrichtungen vorgesehen werden müssen, welche die Helligkeit des Hellfeldbildes dämpfen. Dieser Zweck wird bei der Erfindung durch die zerstreuende Platte nebenher erreicht.There is also the fact that in general with the known devices, which are intended for the alternating use of light and dark lighting, devices still have to be provided which reduce the brightness of the brightfield image dampen. This purpose is complemented by the diffusing plate in the invention achieved.

Claims (1)

PATENTANSPRUCH: Verfahren zum Herstellen einer Hellfeldbekuchtung beim Vorhandensein einer Dunkelfeldbeleuchtung, dadurch gekennzeichnet, daß in. den Strahlengang des Dunkelfeldkondensors zwischen diesem und dem Objektivträger eine lichtzerstreuende Platte (Milchglas, Mattscheibe, mattierter Film o. dgl.) eingeführt wird. Claim: A method for producing bright field lighting when dark field lighting is present, characterized in that a light-dispersing plate (frosted glass, ground glass, matt film or the like) is inserted into the beam path of the dark field condenser between it and the lens carrier.
DEO13779D 1923-07-11 1923-07-11 Method for producing bright field lighting in the presence of dark field lighting Expired DE411484C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEO13779D DE411484C (en) 1923-07-11 1923-07-11 Method for producing bright field lighting in the presence of dark field lighting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEO13779D DE411484C (en) 1923-07-11 1923-07-11 Method for producing bright field lighting in the presence of dark field lighting

Publications (1)

Publication Number Publication Date
DE411484C true DE411484C (en) 1925-03-24

Family

ID=7353487

Family Applications (1)

Application Number Title Priority Date Filing Date
DEO13779D Expired DE411484C (en) 1923-07-11 1923-07-11 Method for producing bright field lighting in the presence of dark field lighting

Country Status (1)

Country Link
DE (1) DE411484C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146276B (en) * 1957-12-13 1963-03-28 Janos Barabas Dipl Ing Condenser to increase the resolving power of microscopes that work with transmitted light

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1146276B (en) * 1957-12-13 1963-03-28 Janos Barabas Dipl Ing Condenser to increase the resolving power of microscopes that work with transmitted light

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