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Fully Lensless Microscopy based on Sub-Wavelength Non-Periodic Holes Array Plate


  Aviram Gur [1]  ,  Ran Aharoni [1]  ,  Zeev Zalevsky [1]  ,  Vladimir G. Kutchoukov [2]  ,  Vicente Mico [3]  ,  Javier Garcia [3]  ,  Yuval Garini [4]  
 [1] School of Engineering and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 52900, Israel
[2] Department of Imaging Science and Technology, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
[3] Departamento de Óptica, Universitat de Valencia, C/Dr. Moliner, 50, 46100 Burjassot, Spain
[4] Physics Department and Nanotechnology Institute, Bar-Ilan University, Ramat-Gan 52900, Israel

We present preliminary results for a novel concept of high resolution microscopic imaging. The proposed microscope does not include an objective lens neither a condenser. Instead, a metallic plate of sub-wavelength non-periodic holes is used in order to illuminate the inspected object that is mounted very close to it. The metallic plate contains an array of holes with a varying pitch. As a result, the transmitted spectrum through each hole differs from the others. As a result, each spot of the detected object is illuminated with a unique spectrum. Therefore, 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.