Results 61 to 70 of about 6,294 (295)
Improvement of double-layer phosphor structure WLEDS in color homogeneity and luminous flux
, 2021 The concept of the analysis is to put a CaAl2O4:Mn2+ green phosphor layer on top of the YAG:Ce3+ yellow phosphor layer. After that, find the added CaAl2O4:Mn2+ concentration appropriate for the highest luminous flux (LF) and color homogeneity (CH).
Phung Ton That +5 more
core +1 more source
Forecasting long term lumen maintenance of LED lamps
ITM Web of Conferences, 2018 Due to the very high life of LED lamps, amounting to tens of thousands of hours, the life declared by the manufacturer is most often life determined on the basis of the method of forecasting the long term lumen maintenance.
Zalesinska Malgorzata +3 more
doaj +1 more source
LUMINOUS FLUX MODULATOR WITH KNOWN OPTICAL PULSE SHAPE
Радіоелектронні і комп'ютерні системи, 2019 The article describes the developed and tested luminous flux modulator (LFM). LFM is designed to identify and study the dynamic distortions of optoelectronic devices (OED) with high temporal resolution.
Антон Александрович Букарев +2 more
doaj +1 more source
, 2014 Citation: 'luminous flux' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.L03646 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms. Requests for commercial
openaire +1 more source
Analysis on the high luminous flux white light from GaN-based laser diode
, 2010 We fabricated a phosphor-conversion white light using an InGaN laser diode that emits 445 nm and phosphor that emits in the yellow region when excited by the blue laser light.
Hu H +5 more
core
The THESEUS Space Mission and the Infrared Telescope Calibration Unit
Astronomische Nachrichten, EarlyView.ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó +9 more
wiley +1 more source
Research on thermal characteristics of heat pipes for led lightning devices
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2014 New energy-saving technologies for lighting is a promising trend in lighting technology. To this end, during the recent decade, have been actively developed and implemented lighting units based on LED modules.
M. A. Lozovoi +3 more
doaj +1 more source
Comparison of Luminous Flux Maintenance, Continous vs. ON/OFF Cycles
, 2021 Most LED lifetime tests focusses on luminous flux maintenance, but on/off cycling have been shown toinfluence the lifetime increasing early catastrophic failures.
Thorseth, Anders +2 more
core
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, EarlyView.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
wiley +1 more source
Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves
Astronomische Nachrichten, EarlyView.ABSTRACT The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE).
Diego Calderón +4 more
wiley +1 more source