Lecture12

Lecture12 - Lecture 12 9.1. The human eye Unaided...

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Unformatted text preview: Lecture 12 9.1. The human eye Unaided Eyeglasses Color perception 9.1 The Human eye Seeing is probably the sense we have Even from the engineering point of view the eye is an amazing instrument Parts of the human eye Imaging of the human eye Meniscus convex lens The human eye as an optical system A.S GRIN lens n=1.376 n=1.0 n=1.336 n=1.337 n=1.406...1.386 Accommodation Relaxed muscle: We focus on inFnity Strained muscle: We focus on something closer by. or most people 25cm is still rather comfortable Why dont we see well underwater ? Dioptric Power Convenient quantity because it is additive (for thin lenses in contact) In physiological optics lenses are characterized in terms of their dioptric power (unit diopter, 1/m) Consider double convex lens = + We can also deFne the dioptric power for each interface Nearsightedness or a relaxed muscle A point in inFnity is focused in front of the retina The far point is not at inFnity How do we correct for that:...
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Lecture12 - Lecture 12 9.1. The human eye Unaided...

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