We investigated the formation of the aerial image in the double-pass method to measure the optical quality of the human eye. We show theoretically and empirically that the double pass through the eye's optics forces the light distribution in the aerial image to be an even-symmetric function even if the single-pass point-spread function is asymmetric as a result of odd aberrations in the eye. Th...

The effect of external-recycle operations on the thermal performance double-pass cross-corrugated solar air heaters (SAH) under different operating conditions was investigated experimentally and theoretically. Additionally, simultaneous ordinary equations were solved analytically for each proposed configuration. Four recycling types are introduced improving with external recycle processes, whic...

As the performance of photovoltaic cells approaches the Shockley-Queisser limit, appropriate schemes are needed to minimize the losses without compromising the current performance. In this paper we propose a planar absorber-mirror light trapping structure where a conventional mirror is replaced by a meta-mirror with asymmetric light scattering properties. The meta-mirror is tailored to have ref...

Ultra-thin photovoltaics enable lightweight flexible form factors, suitable for emerging terrestrial applications such as electric vehicle integration. These devices also exhibit intrinsic radiation tolerance and increased specific power so are uniquely enabling space applications, offering longer missions in hostile environments reduced launch costs. In this work, a GaAs solar cell with an 80-...

We present a theory of perfect absorption in a bilayer model composed of a mu-near-zero (MNZ) metamaterial (MM) absorbing layer on a metallic substrate. Our analytical solutions reveal that a MM layer with a large purely imaginary permeability and a moderate permittivity backed by a metallic plane has a zero reflection at normal incidence when the thickness is ultrathin. The impedance-mismatche...

The current study aims at analysing the suitability of the double-pass technique in measuring the accommodative response. A custom-built setup which allowed simultaneous double-pass and Hartmann-Shack measurements was used. Several metrics to assess the accommodative response were tested and compared. In order to validate double-pass based measurements, the accommodative response was measured i...