Results 21 to 30 of about 655,925 (308)
Highly Concentrated Solar Flux of Large Fresnel Lens Using CCD Camera-Based Method
Sustainability, 2022 Fresnel lens is a kind of lens that can concentrate sunlight up to a level of thousands of suns with small space occupation which is widely used in the research of sunlight concentration and transmission systems via optical fiber.
Kexin Zhang +6 more
semanticscholar +1 more source
Fresnel lens sidewall design for imaging optics [PDF]
Journal of the European Optical Society-Rapid Publications, 2015 We developed a ray tracing simulation tool for imaging systems including a Fresnel lens with a quasi-arbitrary sidewall structure. One issue with Fresnel lens is that noise in the image plane can appear from rays passing through or reflected at its ...
Fujii T. +7 more
doaj +1 more source
High diopter spectacle using a flexible Fresnel lens with a combination of grooves.
Optics Express, 2022 In this study, the Fresnel lens was investigated as a potential candidate for vision correction in patients with myopia. A few previous studies have suggested this idea; however, Fresnel lenses are limited by their aesthetics and quality.
V. Vu +4 more
semanticscholar +1 more source
Optical and quantum electronics, 2021 An asymmetric optical cryptosystem to encrypt images using devil’s vortex Fresnel lens (DVFLs) phase masks and lower upper decomposition with partial pivoting (LUDPP) is proposed in gyrator transform domain. The proposed cryptosystem utilizes DVFLs which
Anshula, Hukum Singh
semanticscholar +1 more source
Performance enhancement of a single slope solar still with single basin using Fresnel lens
Journal of Mechanical Engineering and Sciences, 2021 This paper presents an experimental study using Fresnel lens to increase the overall efficiency of the conventional Single Slope Solar Still (SSSS) with single basin.
Parimal Sharad Bhambare +2 more
doaj +1 more source
Imaging performance of an ultra-precision machining-based Fresnel lens in ophthalmic devices.
Optics Express, 2021 This study aims to resolve the trade-off between the constraints and capabilities of ultra-precision machining to achieve ophthalmic Fresnel lenses. A general Fresnel lens pattern has a narrow variable pitch and curved grooves.
V. Vu +4 more
semanticscholar +1 more source
Microprismatic Fresnel Lens for Formation of Uniform Light Circle
IEEE Photonics Journal, 2021 Focusing Fresnel lenses are used in many fields of applied optics. These devices are used in optical sensor systems for imaging and optoelectronic integration.
M. L. Fu +4 more
doaj +1 more source
LensIet VR: Thin, Flat and Wide-FOV Virtual Reality Display Using Fresnel Lens and LensIet Array
IEEE Transactions on Visualization and Computer Graphics, 2021 We propose a new thin and flat virtual reality (VR) display design using a Fresnel lenslet array, a Fresnel lens, and a polarization-based optical folding technique.
Kiseung Bang +3 more
semanticscholar +1 more source
Elliptical-Shaped Fresnel Lens Design through Gaussian Source Distribution
Energies, 2022 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 solar concentrators.
Dário Garcia +6 more
doaj +1 more source
Design of a stigmatic lens with minimal Fresnel losses
Компьютерная оптика, 2021 A method for designing double aspheric lenses enabling minimal Fresnel losses in the class of stigmatic lenses is considered. Minimization of the Fresnel losses is provided by ensuring equal ray-deviation angles on both aspheric surfaces of the lens. The
L.L. Doskolovich +3 more
doaj +1 more source