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Telescopes - Coggle Diagram
Telescopes
Telescope Basics
Assumptions and basic setup
Parallel rays of light
refraction and reflection
Focus
Optics and mounts
Different types of reflector and focus
Telescope Mounts
Equatorial/Polar
alt-az
Aberrations
Spherical Aberration/Coma/Astigmatism/Distortion/Field curvature/Vignetting
Quantify the Performance
Light gathering power, plate scale, focal ratio, etc.
S = F·θ
Plate scale: P_s=θ/S=1/F
Focal Ratio: R=F/D
fast = small f/R
slow = large f/R
Field of View
PSF, angular resolution
Rayleigh Criterion and Angular Resolution
Seeing and the Point Spread Function
Seeing limited vs. diffraction limited
Adaptive Optics
SNR
What makes a detection:Signal vs. Noise
Signal-to-Noise Ratio and exposure time
Long exposure to boost SNR