OPTI 201R 10 L15

OPTI 201R 10 L15 - 15-1 Chapter 6: Thin Lenses 6.1 Lens...

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15-1 OPTI 201R Fall 2010 Chapter 6: Thin Lenses 6.1 Lens Types and Shape Factors Figure 6.1 Basic lens shapes and their associated radii of curvature: (a) convex lenses; (b) concave lenses. ! Lens shapes shown in cross-section (in the y-z plane). Rotate about the z-axis to get the "3-D" picture. ! Surfaces are spherical ("in OPTI 201 and 202"…they are often aspheric in the world of real rays and non-paraxial optics). ! Convex " $% &’()*+ ,-./0&* 1*(2, ’-340.2 0(2 &’()*.5*, (reduces) the curvature of a wavefront incident on it." ! Concave " $% &’(&0)* ,-./0&* 6, 6(2*(3*2 .*7036)* 3’ 0 /703 surface." (A concave surface bends inward and increases the curvature of a wavefront incident on it.)
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15-2 OPTI 201R Fall 2010 ! 6 basic lens shapes: - equi-convex (bi-convex) - plano-convex - convex-meniscus (R1 may or may not equal R2) - equi-concave (bi-concave) - plano-concave - concave-meniscus (R1 may or may not equal R2) ! Meniscus lens: both surfaces curve (bend) in the same direction. ! "When light travels from left to right, the radius of curvature is positive when a convex surface is encountered first, and the
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OPTI 201R 10 L15 - 15-1 Chapter 6: Thin Lenses 6.1 Lens...

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