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Telescope - Coggle Diagram
Telescope
quantify the performance
Light gathering power
plate scale
π=πΉβ tanβ‘(π)βπΉβ π
π_π =π/π=1/πΉ
focal ratio
πΈβπ·^2/πΉ^2
fast = small f/R
slow = large f/R
π =πΉ/π·
Point Spread Function(PSF)
Seeing
Gaussian PSF
πΉππ»π ~ 2.35 Γ π
Seeing limited vs. diffraction limited
Adaptive Optics
Active Optics
angular resolution
Rayleigh Criterion
r = 1.22π/π·
d = 2.44π/π·
1.22π/π·
max of left sits
at min of right
Diffraction spikes
field of view
telescope basics
assumptios and basic setup
refraction and reflection
Stars are so small that we consider them unresolved.
Astronomical objects are far away.
We always assume plane parallel waves.
optic and mounts
types
Newtonian
Gregorian
R-C
Schimdt-Cassegrain
Schimdt Camera
prime focus
Focus
Primary
Nasmyth
Cassegrain
CoudΓ©
mounts
equatorial/polar
alt-az
aberrations
spherical
on-axis
coma
comet
astigmatism
distortion
field curvature
vignetting
SNR
What makes a detection
Signal vs. Noise
Signal-to-Noise Ratio and exposure time
Poisson Distribution
Long exposure to boost SNR