Rays in the pupil

Rays in the pupil

Fig. 3.18. Third order coma: the "coma patch"

2n'u' V ym whose centres are shifted from I by

n'u' \ym i.e. by the diameter of the circle concerned. The circles nest within two lines tangent to all circles which meet at I with an angle of 60°.

The total extent of the coma patch in the t-section is called the tangential coma and is given for y = ym by

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