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Optical Engineering • new

Bioinspired adaptive gradient refractive index distribution lens
Author(s): Kezhen Yin; Chuan-Yar Lai; Jia Wang; Shanzuo Ji; James Aldridge; Jingxing Feng; Andrew Olah; Eric Baer; Michael Ponting
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Paper Abstract

Inspired by the soft, deformable human eye lens, a synthetic polymer gradient refractive index distribution (GRIN) lens with an adaptive geometry and focal power has been demonstrated via multilayer coextrusion and thermoforming of nanolayered elastomeric polymer films. A set of 30 polymer nanolayered films comprised of two thermoplastic polyurethanes having a refractive index difference of 0.05 were coextruded via forced-assembly technique. The set of 30 nanolayered polymer films exhibited transmission near 90% with each film varying in refractive index by 0.0017. An adaptive GRIN lens was fabricated from a laminated stack of the variable refractive index films with a 0.05 spherical GRIN. This lens was subsequently deformed by mechanical ring compression of the lens. Variation in the optical properties of the deformable GRIN lens was determined, including 20% variation in focal length and reduced spherical aberration. These properties were measured and compared to simulated results by placido-cone topography and ANSYS methods. The demonstration of a solid-state, dynamic focal length, GRIN lens with improved aberration correction was discussed relative to the potential future use in implantable devices.

Paper Details

Date Published: 12 February 2018
PDF: 7 pages
Opt. Eng. 57(2) 027101 doi: 10.1117/1.OE.57.2.027101
Published in: Optical Engineering Volume 57, Issue 2
Show Author Affiliations
Kezhen Yin, Case Western Reserve Univ. (United States)
Chuan-Yar Lai, Case Western Reserve Univ. (United States)
Jia Wang, Case Western Reserve Univ. (United States)
Shanzuo Ji, Case Western Reserve Univ. (United States)
James Aldridge, Case Western Reserve Univ. (United States)
Jingxing Feng, Case Western Reserve Univ. (United States)
Andrew Olah, Case Western Reserve Univ. (United States)
Eric Baer, Case Western Reserve Univ. (United States)
Michael Ponting, PolymerPlus, LLC (United States)


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