File:Telescope-schematic.png

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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 OpenOffice.org
Author	Michael Schmid
Permission ( Reusing this file)	Michael Schmid put it under Creative Commons Attribution ShareAlike 2.0 Austria License.

English

(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

Deutsch

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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