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

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

Good use for diffraction: exoplanets

Chromatic aberration

http://upload.wikimedia.org/wikipedia/en/4/47/Lens6a.svg

http://upload.wikimedia.org/wikipedia/commons/1/15/Lens6b-en.svg

Spherical aberration

Parabolic

Spherical

Coma

Astigmatism

(e.g., Hale telescope)

http://upload.wikimedia.org/wikipedia/commons/b/b3/Astigmatism.svg

Field curvature

(e.g., Oschin Schmidt telescope)

http://upload.wikimedia.org/wikipedia/commons/f/fc/Field_curvature.svg

Distortion

Barrel Pincushion

Keck NIRC

http://en.wikipedia.org/wiki/File:Barrel_distortion.svg

http://en.wikipedia.org/wiki/File:Pincushion_distortion.svg

Reflection and transmission

http://en.wikipedia.org/wiki/File:Optical-coating-2.png

Telescopes

Galilean (refracting)

40” refractor at Yerkes Obs.

http://upload.wikimedia.org/wikipedia/commons/4/4c/Galileantelescope.png

http://upload.wikimedia.org/wikipedia/commons/d/dc/Yerkes_Observatory_Astro4p7.jpg

Telescopes: newtonean

http://upload.wikimedia.org/wikipedia/commons/6/60/Newton-Teleskop.svg

Telescopes: Cassgrain

http://upload.wikimedia.org/wikipedia/en/2/2c/Cassegrain.en.png

Telescopes: Cassegrain

Ritchey-Cretien: Wise, HST, VLT …

http://upload.wikimedia.org/wikipedia/en/2/2c/Cassegrain.en.png

Interlude: mounts

Equatorial

Alt-az

Telescopes: Coude

Naysmith

Coude

Telescopes: prime focus

http://www.astro.caltech.edu/palomar/animations/lfcwirc.mov

Telescopes: Schmidt

Schmidt Cassegrain

Schmidt (e.g., PTF)

Maksutov

http://en.wikipedia.org/wiki/File:Schmidt-Cassegrain-Telescope.svg

http://en.wikipedia.org/wiki/File:Schmidt_telescope_(PSF).png

http://en.wikipedia.org/wiki/File:Maksutov_spot_cassegrain.png

http://en.wikipedia.org/wiki/File:Dmitri_Maxutow_Leutnant.jpg

http://en.wikipedia.org/wiki/File:Maksutov_cassegrain_comercial.png

End

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

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