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The Optics of Simple Lenses

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Presentation on theme: "The Optics of Simple Lenses"— Presentation transcript:

1 The Optics of Simple Lenses
Converging and diverging lenses

2 CONVERGING lens vertical axis object side (usually) image side
(convex lens) vertical axis object side (usually) image side (usually) optical (principal) axis 2F F F’ 2F’ Optical centre (O) or circumcentre (C) or circumcentre (C)

3 CONVERGING lens (convex lens) 2F F F’ 2F’

4 "Large convex lens" by User Fir0002 on en. wikipedia - http://en
Licensed under CC BY-SA 3.0 via Wikimedia Commons -

5 DIVERGING lens vertical axis object side (usually) image side
(concave lens) vertical axis object side (usually) image side (usually) optical (principal) axis 2F F F’ 2F’ Optical centre (O) or circumcentre (C) or circumcentre (C)

6 DIVERGING lens (concave lens) 2F F F’ 2F’

7 "Concave lens" by User Fir0002 on en.wikipedia.
Licensed under CC BY-SA 3.0 via Wikimedia Commons -

8 How to draw the ray diagrams
CONVERGING lens (convex lens) How to draw the ray diagrams 2F F F’ 2F’

9 CONVERGING lens CASE I 2F F F’ 2F’ Properties of the image
(convex lens) CASE I 2F F F’ 2F’ Properties of the image Position: between F’ and 2F’ Attitude: inverted Kind: real Magnification: diminished

10 CONVERGING lens CASE II 2F’ 2F F F’ Properties of the image
(convex lens) CASE II 2F’ 2F F F’ Properties of the image Position: at 2F’ Attitude: inverted Kind: real Magnification: same size

11 CONVERGING lens CASE III 2F F F’ 2F’ Properties of the image
(convex lens) CASE III 2F F F’ 2F’ Properties of the image Position: beyond 2F’ Attitude: inverted Kind: real Magnification: magnified

12 CONVERGING lens CASE IV 2F F F’ 2F’ Properties of the image
(convex lens) CASE IV 2F F F’ 2F’ Properties of the image Position: infinity Attitude: inverted Kind: real Magnification: magnified

13 CONVERGING lens CASE V 2F F F’ 2F’ Properties of the image
(convex lens) CASE V 2F F F’ 2F’ Properties of the image Position: between F and 2F Attitude: upright Kind: virtual Magnification: magnified

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