The distance between the primary and secondary image in a 2-mirror telescope

Fig. 2.11, Fig. 2.12, Eq. (2.81), Eq. (2.84)

p (suffix)

Denotes a field ray, or property thereof, which cuts the axis at P or P'

Fig. 2.5, Fig. 2.6

pr (suffix)

Denotes a principal ray, or property thereof, which cuts the axis at E and E'

Fig. 2.6, Fig. 2.8

Ra

Axial obstruction ratio of a 2-mirror telescope

Eq. (2.58), Eq. (2.72)

r

Radius of curvature of a surface = 1/c (see surface number v)

Eq. (2.13), Eq. (2.36)

Symbol |
Meaning |
Where defined |

ri, r2 ••• |
Defined light rays |
Figs. 2.1, 2.2, 2.4, 2.6, 2.8 |

Was this article helpful? ## Telescopes MasteryThrough 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! |

## Post a comment