Learning Center
Phase-out of Incandescent Light Bulbs - Asia
Brazil and Venezuela started the phase-out of incandescent light bulbs in 2005, and the European Union, Switzerland, and Australia started to phase them out in 2009. Likewise, other nations are implementing new ...
Top-Ten List of LED Manufacturers
Market research firm Strategies Unlimited has unveiled the top-ten list of HB-LED manufacturers in 2010, ranked by revenue from packaged LED sales. Topped by privately-held Japanese manufacturer Nichia, the ...
a Green Laser for Display Projectors
Combining a solid-state laser with intracavity frequency doubling,large conversion efficiency,and a high optical damage threshold results in a low-cost,miniature 532nm light source.Recently,research into laser ...
Photonic Crystals Benefit Phosphor Performance
Nanostructures with a periodically varying refractive index may provide a novel platform that enables efficient phosphorescence when the pump wavelength is well tuned.The development of efficient phosphors with ...
Weilin Hou Video: Improving Underwater Image Quality
Besides particulates,optical turbulence also impacts visibility in the ocean. The major source of degradation in imaging underwater is from scattering by the medium itself and the particles within.Recent ...
Thermally Switched Liquid Crystal Alignment Based on Rubbed ...
The optical properties of linear and concentric polarization rotators,made using a heat-treated,rubbed polymer film,show promise in applications such as beam forming and splitting.14 September 2011,SPIE ...
High-Performance Devices Using Organic Semiconductors
New device architectures overcome the limitations of organic semiconductors and could accelerate development of large organic LEDs.12 September 2011,SPIE Newsroom. Synthetic control over the molecular ...
Naming Conventions for Light Bulb Shapes Definition of Light Bulb Beam Angle The beam angle is the degree of width that light emits from a light source. In specific terms this is the angle between ...
Beam Angle The beam angle of a LED lamp refers to the measure of the spread of the light source and is simply stated in degrees. This is a great feature of LED lamps as the individual LED's can be arranged ...
Color Rendering Index and LEDs
The color rendering index (CRI) has been used to compare fluorescent and HID lamps for over 40 years, but the International Commission on Illumination (CIE) does not recommend its use with white light LEDs. A ...
Artificial light sources are usually evaluated in terms of luminous efficacy of a source, also sometimes called overall luminous efficacy. This is the ratio between the total luminous flux emitted by a device ...
Diodes, in general, are made of very thin layers of semiconductor material; one layer will have an excess of electrons, while the next will have a deficit of electrons. This difference causes electrons to move ...
LED - Efficiency and Operational Parameters
Typical indicator LEDs are designed to operate with no more than 30–60 milliwatts (mW) of electrical power. Around 1999, Philips Lumileds introduced power LEDs capable of continuous use at one watt. These LEDs ...
Bare uncoated semiconductors such as silicon exhibit a very high refractive index relative to open air, which prevents passage of photons at sharp angles relative to the air-contacting surface of the ...
Sander Mulder's Transparent Take on The Traditional Lamp
Each lamp is made from 16 transparent panels connected together, this collection from Sander Mulder adds an inventive twist to a classic shape. These pieces are sure to catch your eye with their unique ...
Solar Water Bottle Cap – Illuminate Your Water for 5 Hours!
The Solarbulb?This unique way to illuminate your water bottle uses a solar powered cap that screws right on your water bottle's top.Said to fit on most plastic water bottles and soft drink bottles this fun ...
Slow Demand From LED Makers Challenges The Sapphire Industry
A shortage of sapphire material between 2010 and 2011 created a window of opportunity for new entrants. In just the last two years, more than 80 companies announced their intention to enter the industry. This ...
Light-emitting diodes (LEDs)—small colored lights available in any electronics store—are ubiquitous in modern society. They are the indicator lights on our stereos, automobile dashboards, and microwave ovens. ...
Centre Street Bridge Seen in a New Light
Centre Street Bridge seen in a new light "The Lions Awaken" – which is the new lighting installed on the Centre Street Bridge in Calgary, Canada has received one of two new Design Lion Awards. The Calgary ...
Choosing The Right Light for Crime Lab
The new Johnson County Sheriff's Office Criminalistics Laboratory (JCCL), located in Olathe, KS, has installed Lusio SSL fixtures for energy savings and reduced maintenance costs. Completed this ...
