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Bi-focal and negative microlens arrays in hard optical materials

Gu, E. and Choi, H.W. and Liu, C. and Watson, I.M. and Girkin, J.M. and Dawson, M.D. (2004) Bi-focal and negative microlens arrays in hard optical materials. In: Lasers and Electro-Optics Society, 2004. LEOS 2004. IEEE, pp. 360-361. ISBN 9780780385573

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Abstract

Using the methods of photoresist reflow and moulding, bifocal and negative microlens arrays, with diameters down to 10 μm, have been fabricated in GaN-on-sapphire. The optical properties of these microlens arrays were characterised by a recently developed reflection/transmission confocal microscopy technique and agree well with calculated values.