4500PH02-1 - Hemispherical Solid Immersion Lens Compact...

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Hemispherical Solid Immersion Lens Compact disks may be read by systems with a variety of optical heads. For ±ne pitch tracks, these include near-±eld optical components such as solid immersion lenses. In operation, the compact disk tracks are immediately adjacent to the ²at surface of the lens. One type of these lenses is the hemispherical solid immersion lens as shown in the ±gure. The refractive index of the lens is n 1 . The refractive index of the surrounding medium is n 2 . The radius of curvature is R . It is known that for paraxial rays the linear magni±cation of the hemispherical solid immersion lens is n 1 /n 2 . An object on the compact disk is at the ²at surface of the lens extending from the axis of the lens to its tip at height h . Two rays from the tip of this object are shown in the diagram. Projecting the refracted rays (right-hand region) back to the left, the image may be visualized. Calculate without approximations and showing all work, an- alytic expressions for the coordinates (
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This note was uploaded on 04/29/2008 for the course ECE 4500 taught by Professor Gaylord during the Spring '08 term at Georgia Institute of Technology.

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4500PH02-1 - Hemispherical Solid Immersion Lens Compact...

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