Light-emitting-diode lamps are widely used because of their long lifespan and excellent electric efficiency. Recently, LED light sources were introduced in several vitrectomy machines for endo-illumination of the retina1. Despite the several advantages of LEDs, many researchers have reported that ...
many reviews. In principle, the incidentlight beamtransforms the sample into an excited state. The thermal deactivation process from the sample induces the changes in the temperature of the thin layer of the coupling medium surrounding the sample. The coupling medium could be atmospheric air or ...
Understanding these phenomena is increasingly important as the light from modern lamps, such as LEDs, typically contains a greater percentage of blue light, making them more biologically effective, and the use of devices that emit artificial light (e.g., smartphones) becomes more pervasive4,26,...
These are regions with high death rates from vector-borne disease [4], making it important to determine how these lights perform as vector attractants. A small difference in attractiveness between two lights can become a large difference in insect numbers when many lights are used over a wide ...
A bright blue light hurts everyone who can see it, regardless of their proximity to the source. Small point, high intensity, blue-component-rich light, like LEDs, can be reflected from a surfaces (desk or counter top, for example) and reach the eyes. LED lamps are richer in blue content...
A), spectral irradiance of the sun on July 2nd, 2019 from 9:00 to 15:00, B), spectral irradiance of visible lamps C), spectral irradiance of cell phones and tablets. D), spectral irradiance of monitors and TV. Table 1. Real (unweighted) irradiance in the visible light range (400–...
Poel, B.R.; Runkle, E.S. Seedling growth is similar under supplemental greenhouse lighting from high-pressure sodium lamps or light-emitting diodes.HortScience2017,52, 388–394. [Google Scholar] [CrossRef] [Green Version] Randall, W.; Lopez, R.G. Comparison of SL from high-pressure sodium...
1.A light emitting device, comprising:an active region comprising semiconductor material;a first metal contact on the active region, the first metal contact having a first face adjacent the active region and a second face remote from the active region and being configured such that photons emitted...
At this moment, no clear standard exists regarding maximum acceptable flicker in LED lamps, but many LED lighting manufacturers specify the percent flicker to be less than 30% in the 100Hz - 120Hz frequency range. LED light output is directly related to the current through the LED, and by ...
e Visible light LED lamps used for THz detection. HWP: half-wave plate; LN: lithium niobate; OAP: 90° off-axis parabolic mirror; P1 and P2: THz polarizer; PCB: printed circuit board; QWP: quarter wave plate; GP: Glen-prism. Full size image THz field strength and polarization ...