Upload
vuongtruc
View
217
Download
0
Embed Size (px)
Citation preview
10/13/10
1
PHY385-‐H1F Introductory Op8cs Class 9 – Outline: Sec8ons 5.1, 5.2
• Geometrical Op8cs Introduc8on • Refrac8on at a Curved Surface • Thin Lens Equa8on • Focal Point • Focal Plane • Images
• Magnifica8on
• Lenses in Combina8on
Image Forma8on From a plane surface
Image forma8on at a spherical interface
R is posi8ve means surface is convex toward the object R is nega8ve means surface is concave toward object so is posi8ve means object is to the leW of interface si is posi8ve means image is real, to the right of interface
€
n1so
+n2si
=n2 − n1R
so si
Lensmaker’s Formula
so2 si2
so1 si1
€
1so1
+1si2
= (nl −1)1R1−1R2
⎛
⎝ ⎜
⎞
⎠ ⎟
10/13/10
2
so si
€
1so
+1si
=1f
The Thin Lens Equa8on:
f is posi8ve for a converging lens f is nega8ve for a diverging lens so is posi8ve means object is real, to the leW of lens si is posi8ve means image is real, to the right of lens si is nega8ve means image is virtual, to the leW of lens
Ray Tracing With a converging thin lens
Ray Tracing With a diverging thin lens
Thin Lens Combina8ons