Aph162.Optics.Talk

Aph162.Optics.Talk - Cleaning optics Geometric optics...

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Unformatted text preview: Cleaning optics Geometric optics Aberrations Fourier optics Modern microscopy in Aph162 lab Optics primer Cleaning optics • Don’t clean optics… but if its dirty Bare optics: 1)Blow off dust (not with organics) 2)Drag and drop * Make sure solvent is good for coatings * don’t clean bare metal surfaces with tissues * Don’t contaminate lens tissue Cleaning optics • Objectives – 1) roll up lens tissue – 2) blot off excess oil – 3) roll up lens tissue and apply solvent; shake off excess – 4) wipe center outward and discard. Geometric optics f f f Image is real Image is virtual Magnification f2 f1 M = f1/f2 f2 f1 M = f1/f2 Paraxial approximation Thin lens equation Now, let n m ~1, d Æ ( ) ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ − − = + 2 1 1 1 1 1 1 R R n s s l i o If s o Æ inf, s i Æ f i (and vice versa) Gaussian lens formula m Geometric optics f f f Image is real Image is virtual Higher approximation (primary abberrations) Fixes: >Apertures >1 surface (PCX Æ BCX) >aspherics >doublets Actually, this lens is backwards… Aberrations • C o m a • astigmatism Aberrations • Field curvature • Distortions Aberrations • Chromatic aberration Fourier Optics...
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This document was uploaded on 01/03/2012.

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Aph162.Optics.Talk - Cleaning optics Geometric optics...

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