PHYS 1070 Lecture Notes - Lecture 11: Chromatic Aberration, Absorbance, Depth Perception
25 Mar 2015
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Phys1070: intro physics for life sci - lecture 11: astigmatism and aberrations. Index of refraction n=c/vm (acts as a measure of optical density of the media) All angles are measured with respect to the normal. Non-uniform curvature of the cornea or lens surface. In the simplest case - 2 different radii of curvature are in the same lens! One axis is in focus while the perpendicular axis is out of focus. Rays of light passing through outer parts of a lens are not focused at the same spot as rays passing through the centre. Rays of different wavelengths are reflected at different angles. Humans have 2 eyes and because they are slightly separated they see 2 slightly different images (binocular parallel) When these 2 images mesh, the difference between them are interpreted by our brain as distance (depth perception)
