This article [J. Micro/Nanolith. MEMS MOEMS. 11, (3 ), 033010 (2012)] was originally published online on 21 September 2012 with an error on page 6 in the Discussion section.
We report the fabrication and testing of 30-μm radii circular InGaN blue light-emitting didode (LEDs) grown on sapphire wafers, with cointegrated Fresnel zone plates (FZP) with outermost ring radii of 99.6 μm on the backside of the sapphire substrates to provide a collimated output. After being embedded on a contact lens platform such LEDs with integrated lenses can aid in producing in-focus images on the human retina. We measured an image width of 50 μm created by a FZP f/3 subsidiary focal point at 230 μm from the surface. We also demonstrate the construction and wireless operation of a contact lens with predetermined embedded text.
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