On the chromatic aberration of microlenses
2006; Optica Publishing Group; Volume: 14; Issue: 11 Linguagem: Inglês
10.1364/oe.14.004687
ISSN1094-4087
AutoresPatrick Ruffieux, Toralf Scharf, Hans Peter Herzig, R. Völkel, K. J. Weible,
Tópico(s)Orbital Angular Momentum in Optics
ResumoThe optical properties of plano-convex refractive microlenses with low Fresnel Number (typically FN < 10) are investigated. It turns out that diffraction effects at the lens aperture limit the range of the effective focal length. The upper limit of the focal length is determined by the diffraction pattern of a pinhole with equal diameter. In addition achromatic microlenses can be realized because refraction and diffraction have opposing effects on the focal length. Gaussian beam propagation method has been used for simulation. The presented results are of relevance for applications, where microlenses with small apertures and long focal lengths are used, for example, Shack Hartmann wavefront sensors or confocal microscopes.
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