Observational techniques meeting #2. Good use for diffraction: exoplanets.

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Presentation transcript:

Observational techniques meeting #2

Good use for diffraction: exoplanets

Chromatic aberration

Spherical aberration Parabolic Spherical

Coma

Astigmatism (e.g., Hale telescope)

Field curvature (e.g., Oschin Schmidt telescope)

Distortion BarrelPincushion Keck NIRC

Reflection and transmission

Telescopes Galilean (refracting) 40” refractor at Yerkes Obs.

Telescopes: newtonean

Telescopes: Cassgrain

Telescopes: Cassegrain Ritchey-Cretien: Wise, HST, VLT …

Interlude: mounts Equatorial Alt-az

Telescopes: Coude Naysmith Coude

Telescopes: prime focus

Telescopes: Schmidt Schmidt Cassegrain Schmidt (e.g., PTF) Maksutov

End

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