Advances in OptoElectronics / 2011 / Article / Fig 12

Review Article

From Spheric to Aspheric Solid Polymer Lenses: A Review

Figure 12

Micrograph of a multiring microlens and thickness measurements; relationship between size, NA value, and focal length (a) before heat treatment; (b) after first heat treatment; (c) after second heat treatment; (d) after third heat treatment; (e) relationship between multiring Teflon pattern size and NA value; (f) relationship between multiring Teflon pattern size and focal length.

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