Info

sin 20

If we take y = ym, we have the coordinates of rays distributed round the edge of the pupil at azimuth angle 0. This leads to the classical transverse aberration of Fig. 3.18, known as the "coma patch". The principal ray intersects at the point I . This corresponds to the point E' at the centre of the pupil (right-hand diagram). Because of the double angle 20, both the marginal rays 1 in the t-section cut at the same point 1 in the coma patch. The ray coordinates lie on circles of radius

comat

4r

0 „

Was this article helpful?

0 0
Telescopes Mastery

Telescopes Mastery

Through this ebook, you are going to learn what you will need to know all about the telescopes that can provide a fun and rewarding hobby for you and your family!

Get My Free Ebook


Post a comment