15 February 2017 Experimental characterization of a F/1.5 geometric-phase lens with high-achromatic efficiency and low aberration
Author Affiliations +
Abstract
We report on the properties of a fast F/1.5 geometric-phase lens with a focal length of 37 mm at 633 nm and a 24.5 mm diameter. This lens employs photo-aligned liquid crystal layers to implement the spatially varying Pancharatnam-Berry phase, leading to the expected polarization- and wavelength-dependent focusing. An achromatic spectrum is achieved using (chiral nematic) multi-twist retarder coatings, with high first-order (≥98%) and low zero-order (≤1%) transmittance across 450-700 nm. We measure traditional optical metrics of the GP lens including focused spot profile and modulation transfer function through knife edge testing and NBS 1963a resolution charts. This work includes a comparison to similar F/# conventional thick and thin lenses.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Kathryn J. Hornburg, Jihwan Kim, Michael J. Escuti, "Experimental characterization of a F/1.5 geometric-phase lens with high-achromatic efficiency and low aberration", Proc. SPIE 10125, Emerging Liquid Crystal Technologies XII, 101250Y (15 February 2017); doi: 10.1117/12.2258545; https://doi.org/10.1117/12.2258545
PROCEEDINGS
8 PAGES + PRESENTATION

SHARE
Back to Top