Zernike Terms Explained for Telescope Makers

Zernike terms explained especially as they relate to lenses and mirrors and interferometry and DFTFringe software. Special thanks to Paul Valleli who helped write the text for this video. All mistakes are mine, not his. Chapters 00:00 Intro and advertisement 00:34 Overall explanation (zernike description, wavefront versus surface error, orthogonality, wavelength, similarity to Fourier Transform) 07:39 Spherical Aberration - what is it, parabolic mirror versus spherical mirror 10:42 Null feature in DFTFringe - what it does, how it works 13:10 Astigmatism - x astig, oblique astig, how to remove it 16:10 Wavefront Inversion - when to invert the wavefront 17:54 Defocus 18:13 Coma