Sub-wavelength and non-periodic holes array based fully lensless imager |
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| Authors: | Aviram Gur Zeev Zalevsky Vladimir G Kutchoukov Javier Garcia |
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| Institution: | a School of Engineering and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 52900, Israelb Department of Imaging Science and Technology, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlandsc Departamento de Óptica, Universitat de Valencia, C/Dr. Moliner, 50, 46100 Burjassot, Spaind Physics Department and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 52900, Israel |
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| Abstract: | We present a novel concept for microscopic imaging. The proposed microscope-like device does not include an objective lens neither a condenser. Instead, a metallic plate of sub-wavelength hole-array with a varying pitch is used to illuminate the inspected object that is mounted very close to it. As a result, the transmitted spectrum through each hole differs from the others and therefore, each spot of the detected object is illuminated with a unique spectrum. By measuring a single spectrum that is the sum of all the spectra that are transmitted through the sample and by using spectral decomposition algorithms, the spatial transmission pattern of the object can be extracted. |
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| Keywords: | Fourier transform optics Image processing and restoration Nano-plasmonics |
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