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 lightingInfo
- 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
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
- G02B21/12—Condensers affording bright-field illumination
- G02B21/125—Condensers 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)
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)
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 |
-
1923
- 1923-07-11 DE DEO13779D patent/DE411484C/en not_active Expired
Cited By (1)
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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