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Communication

Randomly Multiplexed Diffractive Lens and Axicon for Spatial and Spectral Imaging

1
Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
2
Melbourne Centre for Nanofabrication, Australian National Fabrication Facility, 151 Wellington Road, Clayton, VIC 3168, Australia
3
Tokyo Tech World Research Hub Initiative (WRHI), School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1, Ookayama, Meguro-ku, Tokyo 152-8550, Japan
*
Authors to whom correspondence should be addressed.
Micromachines 2020, 11(4), 437; https://doi.org/10.3390/mi11040437
Received: 31 March 2020 / Revised: 18 April 2020 / Accepted: 20 April 2020 / Published: 21 April 2020
(This article belongs to the Special Issue Micro/Nano-surfaces: Fabrication and Applications)
A new hybrid diffractive optical element (HDOE) was designed by randomly multiplexing an axicon and a Fresnel zone lens. The HDOE generates two mutually coherent waves, namely a conical wave and a spherical wave, for every on-axis point object in the object space. The resulting self-interference intensity distribution is recorded as the point spread function. A library of point spread functions are recorded in terms of the different locations and wavelengths of the on-axis point objects in the object space. A complicated object illuminated by a spatially incoherent multi-wavelength source generated an intensity pattern that was the sum of the shifted and scaled point spread intensity distributions corresponding to every spatially incoherent point and wavelength in the complicated object. The four-dimensional image of the object was reconstructed using computer processing of the object intensity distribution and the point spread function library. View Full-Text
Keywords: Fresnel zone lens; axicon; incoherent imaging; diffractive optics; three-dimensional imaging; spectral imaging; correlation optics Fresnel zone lens; axicon; incoherent imaging; diffractive optics; three-dimensional imaging; spectral imaging; correlation optics
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MDPI and ACS Style

Anand, V.; Katkus, T.; Juodkazis, S. Randomly Multiplexed Diffractive Lens and Axicon for Spatial and Spectral Imaging. Micromachines 2020, 11, 437. https://doi.org/10.3390/mi11040437

AMA Style

Anand V, Katkus T, Juodkazis S. Randomly Multiplexed Diffractive Lens and Axicon for Spatial and Spectral Imaging. Micromachines. 2020; 11(4):437. https://doi.org/10.3390/mi11040437

Chicago/Turabian Style

Anand, Vijayakumar, Tomas Katkus, and Saulius Juodkazis. 2020. "Randomly Multiplexed Diffractive Lens and Axicon for Spatial and Spectral Imaging" Micromachines 11, no. 4: 437. https://doi.org/10.3390/mi11040437

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