1. Telescope Ray Diagram
Click to see each stage

2. How to draw the ray diagram
Electronics
23/02/2019
How to draw the ray diagram
Draw the lens axes
Draw rays parallel with the principal axis
The refracted rays meet at the focal plane
The eyepiece rays emerge parallel to this line.
Draw a light construction line from the centre of the eyepiece to the focal plane
Draw the parallel rays coming out of the eyepiece
Draw the rays coming in at angle a
Draw the refracted rays going through the principal focus
They meet the principal axis at angle b
Objective
Eyepiece
Angle b
Angle a
Focal Plane
23/02/2019
Leeds City College
Leeds City College