OPTI 201R 10 L19

# OPTI 201R 10 L19 - 19-1 Class Exercise #1: Gaussian-reduce...

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19-1 OPTI 201R Fall 2010 Class Exercise #1: Gaussian-reduce the human eye wearing eyeglasses. The Human Eye, with Eyeglasses: 1 2 1 2 1 16 1 eye eye tot tot glasses eye glasses eye eye tot eye tf mm t n ! ! ! !! " # " # \$ % & # \$ % # …the power of the combination of the eyeglasses and the eye remains unchanged… …so why wear the eyeglasses? The back principal plane has shifted: ’ (’ ( ’ ( ’ ( 2 1 2 1 eye eye eye tot glasses glasses glasses eye f t ff ) * * % +, %% ## # -. /0 % # If a person is near-sighted (myopic), his/her eye is too long (or perhaps eye is too large, making f eye too small). Either way, objects at infinity are imaged in front of the retina , and appear blurry to the myopic person. Said another way, the distance F retina * 1 is too large. Eyeglasses (having negative power) correct this by moving the back principal point P * and the back focal point F * of the eye/glasses system towards the retina (if glasses is negative, then * is positive and the image is now formed on the retina, assuming glasses is chosen correctly).

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19-2 OPTI 201R Fall 2010 Class Exercise #2:

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## This note was uploaded on 08/23/2010 for the course OPTICS 201R taught by Professor Staff during the Spring '10 term at University of Arizona- Tucson.

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OPTI 201R 10 L19 - 19-1 Class Exercise #1: Gaussian-reduce...

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