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Description Schematic drawing demonstrating how a telescope works (Keplerian or astronomical telescope)
Deutsch: Prinzipieller Strahlengang im Astronomischen Fernrohr. Das Objektiv (1) erzeugt vom Objekt (4) ein reelles, umgekehrtes Zwischenbild (5), das man mit einer "Lupe" (Okular 2) betrachtet. Das Auge (3) sieht ein winkelmäßig vergrößertes, virtuelles Bild (6) in scheinbar großer Entfernung (strichlierte Parallelstrahlen).
English: Keplerian telescope, schematic
Date 2005-Jul-09
Source Drawing created by myself as to test the drawing program of
Author Michael Schmid
( Reusing this file)

Michael Schmid put it under Creative Commons Attribution ShareAlike 2.0 Austria License.


(1) Objective lens ( focal length f_1)

(2) Eyepiece (aka. ocular; focal length f_2)

(3) Eye

(4) Object (at a large distance)

(5) Real Image of the object at the focal plane of the objective lens (here, a film or CCD detector could be placed for photographing the object)

(6) Virtual Image of the object (as it appears to the eye)

(7) Tube


Strahlengang in einem astronomischen Fernrohr (Kepler'sches Fernrohr):

(1) Objektiv ( Brennweite f_1)

(2) Okular ( Brennweite f_2)

(3) Auge

(4) Objekt (in großer Entfernung)

(5) Reelles Zwischenbild in der Fokalebene des Objektivs (zum Fotografieren könnte hier der Film oder ein CCD-Chip platziert werden)

(6) Virtuelles Bild (das dem Auge erscheint)

(7) Fernrohrgehäuse

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