LEDs challenge xenon lamps.
Physicians and scientists have two major options when it comes to solid-state lighting for applications in fiber optics: conventional lamps, using xenon gas, or LEDs. The light sources, which may be used for tasks ranging from endoscopy in medical settings or borescopy for jet engine inspection, must generate light output with high luminance in order to couple sufficient light into the used light fiber of 5 mm in diameter or even smaller. Until recently, LEDs couldn't generate the light output needed to fully compete with 300-W xenon lamps. But OSRAM GmbH, Osram Sylvania and T.Q. Technology Co. Ltd. have jointly developed a new white-light LED module based on laser technology: the ITOS PHASER 3000. Designed for light sources using fibers about 5 mm in diameter, the system generates non-modulated white light at a nominal (80% of maximum) level of 2,100 lumens and three times higher luminance than common competing LED options. The light output at the distal end of an endoscope truly matches the same performance as when using a typical 300-W xenon lamp, which are the most commonly used type for this application.
ITOS PHASER 3000 lasts up to 30 times longer than xenon lamps. It generates significantly less heat and therefore also less fan noise when cooling the system. Specifically in endoscopy applications it is of advantage that the light output is free of infrared or ultraviolet light, reducing the impact on the patients tissue during surgery.
* OSRAM GmbH, www.osram.com