Microlens arrays for confocal microscopy |
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Authors: | HJ Tiziani R Achi RN Krämer T Hessler MT Gale M Rossi RE Kunz |
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Institution: | aHJT; RA and RNK are in the Institut für Technische Optik; Universität Stuttgart; Pfaffenwaldring 9; D-70569 Stuttgart; Germany;bTH; MTG; MR and REK are in the Paul Scherrer Institute; Badenerstrasse 569; CH-8048 Zurich; Switzerland |
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Abstract: | A new; high resolution measuring system based on confocal microscopy has been developed for the evaluation of microlens arrays; in particular for applications in confocal microscopy itself. Lenslet arrays for parallel scanning and processing in confocal microscopy were designed as phase-matched Fresnel lenslets and fabricated by direct laser writing. Replica arrays were produced by ultraviolet embossing and hot embossing techniques. Fabricated arrays with a numerical aperture of 0.28 exhibited near diffraction limited performance and a focal length standard deviation of 120 nm in a nominal value of 250 μm. The technique developed represents a convenient and powerful technique for the characterization of lenslet arrays in general. |
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Keywords: | micro-optics microlens arrays confocal microscopy |
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