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OLLI Online Course: Stephen King’s Different Seasons: Four Novellas
Stephen King has described Different Seasons as “a book with stories in it about an offbeat prison break, an old man and a boy locked up in a gruesome relationship based on mutual parasitism, a quartet of country boys on a journey of discovery, ...
Describes how transparent objects may only retard light without diffracting it
Spatial filtering in the transform plane
Using a small aperture slider to remove diffracted orders in the transform plane eliminates detail in the image plane.
Deriving Numerical Aperture = N.A.
The geometries of diffraction patterns must match the geometries of acceptance angle.
Condenser N.A. must at least match that of the objective to realize full resolution.
Complex frequency-based information can be decomposed into combinations of simple waveforms.