GeomOpt3 - Section3.Lenscombinations Section...

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Section 3. Lens combinations References: Hecht 5.2 ©AGK 2010 Geometric optics 1: Lenses and lens combinations 69
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Overview Most optical systems contain more than one lens. In this class we will introduce some simple equations for combinations of pairs of lenses. This will also allow us to study some of the terms that are used to describe compound optical systems, which we will relate to real instruments such as telescopes and microscopes. ©AGK 2010 Geometric optics 1: Lenses and lens combinations 70
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Learning outcomes •J u s t i f y derivation of compound lens equations • Apply compound lens equations •D e f i n e front focal length, back focal length and effective cal length focal length • Calculate these quantities (bfl and ffl) ©AGK 2010 Geometric optics 1: Lenses and lens combinations 71
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Thin lens review S 2 P 1 y o F i A W S 1 P 2 y i F o x o f f x i O REVIE s o s i   11 1 1 1 1 l n s s RR    12 oi fs  ©AGK 2010 Geometric optics 1: Lenses and lens combinations 72
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Optics Bench applet ©AGK 2010 Geometric optics 1: Lenses and lens combinations 73 http://webphysics.davidson.edu/physlet_resources/optics4/default.html
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Thin lens combinations •M o s t optical systems contain several lenses, which may be both positive and negative •W e need to be able to calculate location and magnitude f image of image h e n there are more than 2 or 3 lenses it is easier to use a computer or the matrix formulation (see later) • However, we will study formulae for 2 lens systems ©AGK 2010 Geometric optics 1: Lenses and lens combinations 74
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Thin lens combinations: ray trace Thin lens separated by distance > sum of their focal lengths Easy to locate final image by finding intermediate image 1. Thin lens separated by distance
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This note was uploaded on 09/28/2010 for the course ECSE ECSE 527 taught by Professor Kirk during the Winter '10 term at McGill.

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GeomOpt3 - Section3.Lenscombinations Section...

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