Chirped arrays of refractive ellipsoidal microlenses for aberration correction under oblique incidence

Improvements of the resolution homogeneity of an ultra-thin artificial apposition compound eye objective are accomplished by the use of a chirped array of ellipsoidal micro-lenses. The array contains 130x130 individually shaped ellipsoidal lenses for channel-wise correction of astigmastism and field...

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Bibliographic Details
Published in:Optics express 2005-12, Vol.13 (26), p.10539-10551
Main Authors: Duparré, Jacques, Wippermann, Frank, Dannberg, Peter, Reimann, Andreas
Format: Article
Language:English
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Summary:Improvements of the resolution homogeneity of an ultra-thin artificial apposition compound eye objective are accomplished by the use of a chirped array of ellipsoidal micro-lenses. The array contains 130x130 individually shaped ellipsoidal lenses for channel-wise correction of astigmastism and field curvature occurring under oblique incidence. We present an analytical approach for designing anamorphic micro-lenses for such purpose based on Gullstrands equations and experimentally validate the improvement. Considerations for the design of the photolithographical masks for the micro-lens array fabrication by melting of photoresist cylinders with ellipsoidal basis are presented. Measurements of the optically performance are proceed on first realized artificial compound eye prototypes showing a significant improvement of angular resolution homogeneity over the complete field of view of 64.3?.
ISSN:1094-4087
1094-4087
DOI:10.1364/opex.13.010539