PURPOSE To characterize and explore the efficacy of a novel low-cost, lowfluid, broad-beam optical-CT system for 3D-dosimetry in radiochromic Presage dosimeters. Leading current optical-CT systems incorporate expensive glass-based telecentric lens technology, and a fluid bath with substantial amounts of fluid (which introduces an inconvenience factor) to minimize refraction artifacts. Here we i...

This letter presents a novel hybrid design approach for the Fresnel zone lenses (FZL). The method combines two conventional approaches: grooved and perforated methods. Perforated minimize shadow blockage that suffer from, therefore provide improved antenna gain. However, fabrication of low refractive index regions in is challenging due to limited manufacturing resolution, which means dielectric...

Modern optical telescopes are giving us unprecedented imaging of the Universe in order to probe into the nature of dark matter and dark energy. Large optical telescopes require complex optical systems—often involving multiple lenses and mirrors. Light diffraction patterns on the focal planes influence imaging resolution, so a good understanding of diffraction is required to ensure high precisio...

It has been established that of all types aberrations following the implantation intraocular lenses, most significant is spherical, inherent in spherical optics various aspects. This paper proposes a method for reducing longitudinal aberration lenses by applying an additional optical layer onto their surface. To reduce aberration, thickness polytetrafluoroethylene (Teflon) was simulated program...

A novel three-dimensional elliptical-shaped Fresnel lens (ESFL) analytical model is presented to evaluate and maximize the solar energy concentration of Fresnel-lens-based concentrators. AutoCAD, Zemax Ansys software were used for ESFL design, performance evaluation temperature calculation, respectively. Contrary previous modeling processes, based on edge-ray principle with an acceptance half-a...

The Fresnel sine integral S(x), the Fresnel cosine integral C(x), and the associated functions S + (x), S − (x), C + (x), and C − (x) are defined as locally summable functions on the real line. Some convolutions and neutrix convolutions of the Fresnel sine integral and its associated functions with x r + , x r are evaluated. 1. Introduction. The Fresnel integrals occur in the diffraction theory...

Advances in holography have led to applications including data storage, displays, security labels, and colorimetric sensors. However, existing top-down approaches for the fabrication of holographic devices are complex, expensive, and expertise dependent, limiting their use in practical applications. Here, ink-based holographic devices have been created for a wide range of applications in diffra...

We have developed reflective diffraction optical elements (DOE) for focusing radiation of terahertz free electron lasers (FEL). Metal-dielectric Fresnel zone plates and metallic kinoform “lenses” were fabricated and tested using FEL radiation. A microbolometer camera (see the paper by Esaev et al. at this conference) sensitive to THz radiation had been applied for recording both terahertz beam ...