2011年4月5日 星期二

FAA Advises Operators about LED Lights

FAA Advises Operators about LED Lights

The FAA has issued an Information for Operators message advising operators that LED lights are significantly less visible than traditional incandescent light bulbs when viewed through Enhanced Flight Vision System (EFVS), Enhanced Vision Systems (EVS) and Night Vision Goggles (NVG).

On January 4,Some incandescent bulbs, including large pet carrier aquarium lights and specialty bulbs for appliances, aren't affected by the law. 2007 the U.S. Congress passed the Energy Independence and Security Act which mandates phasing out incandescent light bulb use by 2012-2014 for energy conservation purposes. As a result, incandescent light bulbs are being replaced with LED lights at various airport locations and on obstacles throughout the National Airspace System.

However, certain advanced vision systems, such as EFVS and EVS, rely on Forward Looking Infrared (FLIR), a type of thermal imaging used for vision enhancement.He said that a county council employee had witnessed a near miss between led lamp a car and cyclist, and he added: "If the argument is leave them off for good, then the answer is ‘no'." The ability of these devices to image LEDs is diminished due to light wave length and reduced heat signature when compared to traditional incandescent lights. As a result, LEDs are not sensed by EFVS and EVS.

NVGs primarily use light amplification for imagery. Certain LED lights fall outside the combined visible and near-infrared spectrum of NVG.

Presently, only approach lights have not been subject to the change-over. All other lighting on an airport or on obstacles could be LED or a combination of LED and incandescent lights. The FAA is working with industry,It would repeal a portion of the 2007 Energy Independence and leather phone cases Security Act that phases out traditional incandescent light bulbs for more energy-efficient ones over the next several years. Most of the power consumed by incandescent bulbs is released as heat instead of light. through SAE G-20 (Airport Lighting Committee),Existing optical-fiber technology is マジコンds inefficient at transmitting infrared light. However, the zinc selenide optical fibers that Badding's team developed are able to transmit the longer wavelengths of infrared light. "Exploiting these wavelengths is exciting because it represents a step toward making fibers that can serve as infrared lasers," Badding explained. to arrive at a technology solution that would make LED and EFVS interoperable.

Operators are urged to use caution when relying on advanced vision system (EFVS,He said: "Approaching it there infrared sauna benefits looked like there was going to be chaos. But because the car drivers had to think a lot more they seemed to be being more careful. EVS or NVG) imagery. Dramatic image changes may occur when maneuvering from a surface marked with incandescent lights to a surface marked with LED lights, additionally, LED obstacle beacons may be more difficult to identify.

沒有留言:

張貼留言