Compact Imaging Systems Based on Annular Harmonic Lenses

In this study, a configuration of a compact imaging objective based on a reflecting annular harmonic lens was proposed. Light propagation through the proposed optical system was comprehensively modeled using a dedicated special program and the ZEMAX software, with the latter used to derive the point spread function (PSF). Several relationships were used to describe the connection between key parameters of the objective, including its focal length, field of view, and thickness. We demonstrated that it was possible to design a compact imaging objective whose overall length could be one to two orders of magnitude smaller than its focal length. Using direct laser writing, a reflecting annular harmonic lens was fabricated and used in the proposed objective scheme. The performance of the objective was experimentally studied by imaging a light source and a test pattern. The performance of the compact imaging objective based on a reflecting annular harmonic lens was verified in principle. A PSF value of approximately 16 microns was experimentally obtained, for a lens with a diameter of 25 mm with a focal length of 100 mm.

[1]  A G Verhoglyad,et al.  Polar coordinate laser pattern generator for fabrication of diffractive optical elements with arbitrary structure. , 1999, Applied optics.

[2]  Rajesh Menon,et al.  Imaging with flat optics: metalenses or diffractive lenses? , 2019, Optica.

[3]  G. I. Greĭsukh,et al.  Layout and design of a periscope-type refraction–diffraction objective for a mobile communication device , 2016 .

[4]  G. M. Morris,et al.  Spectral properties of multiorder diffractive lenses. , 1995, Applied optics.

[5]  R. Menon,et al.  Full-color video and still imaging using two flat lenses. , 2018, Optics express.

[6]  Ahmad Rosli Abdul Manaf,et al.  Design and fabrication of Si-HDPE hybrid Fresnel lenses for infrared imaging systems. , 2017, Optics express.

[7]  G E Sommargren,et al.  Harmonic diffractive lenses. , 1995, Applied optics.

[8]  B. Shen,et al.  Broadband imaging with one planar diffractive lens , 2017, Scientific Reports.

[9]  Y Fainman,et al.  Diffractive lenses for chromatic confocal imaging. , 1997, Applied optics.

[10]  Artem V. Nikonorov,et al.  Fresnel lens imaging with post-capture image processing , 2015, 2015 IEEE Conference on Computer Vision and Pattern Recognition Workshops (CVPRW).

[11]  J. Wolffsohn,et al.  Multifocal diffractive lens generating several fixed foci at different design wavelengths. , 2018, Optics express.

[12]  V. P. Korol’kov.  Sensitivity of an optimized contour mask technique to errors in fabricating piecewise continuous relief diffractive optical elements , 2014 .

[14]  Rajesh Menon,et al.  A new class of multi‐bandgap high‐efficiency photovoltaics enabled by broadband diffractive optics , 2015 .

[15]  Wei Ting Chen,et al.  Achromatic metalens over 60 nm bandwidth in the visible , 2017, 2017 Conference on Lasers and Electro-Optics (CLEO).

[16]  E. G. Ezhov,et al.  Diffractive elements for imaging optical systems , 2017 .

[17]  Yifan Peng,et al.  The diffractive achromat full spectrum computational imaging with diffractive optics , 2016, ACM Trans. Graph..

[18]  Rajesh Menon,et al.  Design and analysis of multi-wavelength diffractive optics. , 2012, Optics express.

[19]  Nikolay L. Kazanskiy,et al.  Toward Ultralightweight Remote Sensing With Harmonic Lenses and Convolutional Neural Networks , 2018, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing.

[20]  E. G. Ezhov,et al.  Taking diffractive efficiency into account in the design of refractive/diffractive optical systems , 2016 .

[21]  G M Morris,et al.  Diffractive-refractive behavior of kinoform lenses. , 1997, Applied optics.

[22]  Peng Wang,et al.  Optical microlithography on oblique and multiplane surfaces using diffractive phase masks , 2015 .

[23]  Rajesh Menon,et al.  Chromatic-aberration-corrected diffractive lenses for ultra-broadband focusing , 2016, Scientific Reports.

[24]  V. Veiko,et al.  Laser Technologies in Micro-Optics. Part 2. Fabrication of Elements with a Three-Dimensional Profile , 2018 .

[25]  Raymond N. Wilson,et al.  Reflecting telescope optics I : basic design theory and its historical development , 2007 .