Chapter 6 Optical telescopes
basic principals
refraction: Snell's law
reflection:the law of reflection
How do we collect lights by using the two principals?
types
evaluate the quality
refractors/reflectors
singlets/doublets/triplets
how large is the image?
focal length
image scale
focal ratio
how bright is the image?
surface brightness
image brightness
how good is the image?
diffraction
Airy disk
Rayleigh criterion
six kind of aberrations
mount:how do we control the telescope?
How do we "see" the stars after collecting the light?
eyepieces
calculate the best diameter
other visual accessories
Fov：how wide we can see?