Results 81 to 90 of about 655,925 (308)
Glass molding of all glass Fresnel lens with vitreous carbon micromold.
Optics Express, 2019 An all glass Fresnel lens (AGFL) was fabricated by glass molding with a vitreous carbon (VC) micro mold. In the glass molding process, a glass plate was heated up to its softening temperature and pressed against to the VC mold to replicate the Fresnel ...
Young Kyu Kim, M. R. Haq, Seok-min Kim
semanticscholar +1 more source
Adaptive Fresnel lens: basic theory
Journal of the Optical Society of America AWe present a design for an adaptive Fresnel lens. The focal length can be altered by rotating two components relative to each other, each comprising modified cylindrical lenses wound into spirals. The main light-ray-direction change is due to transmission through pairs of parallel cylindrical lenses whose focal lengths have equal magnitude but opposite
Ivan Armstrong +2 more
openaire +1 more source
Advanced Materials Technologies, EarlyView.This review explores recent advances in digital micromirror device (DMD)‐based lithography, focusing on its programmable light modulation, multi‐material compatibility, and dimensional patterning strategies. It highlights innovations from optical system design to materials integration and multifunctional applications, positioning DMD lithography as a ...
Yubin Lee +5 more
wiley +1 more source
All-optical atom surface traps implemented with one-dimensional planar diffractive microstructures [PDF]
, 2006 We characterize the loading, containment and optical properties of all-optical atom traps implemented by diffractive focusing with one-dimensional (1D) microstructures milled on gold films.
H. J. Lezec +3 more
core +2 more sources
Design and Optimization of Fresnel Lens for High Concentration Photovoltaic System
International Journal of Photoenergy, 2014 A practical optimization design is proposed, in which the solar direct light spectrum and multijunction cell response range are taken into account in combination, particularly for the Fresnel concentrators with a high concentration and a small aspect ...
Lei Jing +5 more
doaj +1 more source
IEEE Access, 2021 Based on high efficiency and wide spectral splitter film and Fresnel lens, we have theoretically investigated a full solar-spectrum power-generation system. Designed nano-multilayers are fabricated on Fresnel lens. Then short wavelengths (400 nm ~
Dong Wang, Houzhi Cai, Ou Yang
doaj +1 more source
9-fold Fresnel–Köhler concentrator with Fresnel lens of variable focal point
Optics Express, 2014 Non-uniform irradiance patterns over Multi-Junction Cells gives rise to power losses, especially when considering spectral irradiance distributions over different junctions. Thermal effects on Silicone-on-Glass lenses affect spectral irradiance distributions. A new Photovoltaic Concentrator (CPV), formed by nine optical channels, each one with a Köhler
Mendes Lopes, Joao +3 more
openaire +3 more sources
Photonic Hybrid Integration: Strategies and Promises of Advanced Additive Manufacturing
Advanced Optical Materials, EarlyView.Heterogeneous photonic integration combines wafer bonding, transfer printing, and advanced multi‐photon lithography to realize compact, adaptable photonic systems. This review highlights breakthroughs in hybrid materials, metrology, and 4D printing, revealing how the convergence of traditional and emerging fabrication unlocks scalable, high‐performance
Zhitian Shi +3 more
wiley +1 more source
Advanced Science, EarlyView.This review summarizes green and low‐carbon strategies throughout the entire life cycle of polyester plastics, including sustainable monomer synthesis, optimization polymerization, efficient recycling, and advanced upcycling technologies. The synergistic implementation of these strategies is expected to significantly promote the development of a ...
Jinzhou Li +5 more
wiley +1 more source
Optical Tests on a Curve Fresnel Lens as Secondary Optics for Solar Troughs
International Journal of Photoenergy, 2017 A curve Fresnel lens is developed as secondary concentrator for solar parabolic troughs to reduce the number of photovoltaic cells. Specific measurements and optical tests are used to evaluate the optical features of manufactured samples. The cylindrical
D. Fontani +5 more
doaj +1 more source