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Optical Telescopes - Coggle Diagram
Optical Telescopes
Focal length, image scale and focal ratio
Focal point
Focal length
image scale
Focal ratio
f_/ = F/d
CCD
Angular resolution
Airy disk
diffraction rings
Rayleigh criterion
Dawes limit
Telescope optics: basic principle
Snell's Law
Refraction
Reflection
Types of telescope
refractors
singlets
doublets
triplets
reflectors
Newtonian
Classical Cassegran
Gregorian
compound
Schmidt camera
Schimdt-Cassegrain
Aberrations
chromatics
dispersion
Vignetting
off-axis
coma
astigmatism
distortion
field curvative
Other visual accessories
star diagonal
Barlow lens
erecting lens
Collecting light
light gathering power
large objectives collect light much faster than smaller ones
Surface brightness and image brightness
Surface brightness
brightness per unit area for an extended object
Image brightness
the light gathering power(LGP) divided by the image area
Telescope mount
purposes
to point a specific location on the sky
to track a target in order to compenstae for its change in location
to support the optical tube assembly
class
equatorial
alt_az
Foci
Nasmyth focus
Coude focus
Limiting magnitude
M_L=2.7 + 5logd
Field of view
fov=tcos(delta)/239