Controllo ottico  Fabbricanti, Commercianti, Fornitori

GRT(Beijing Guangruntong Technology Development Co., Ltd.) is headquartered in Beijing Zhongguancun Hi-Tech Park and began in April 2008. GRT has gathered a group of senior R&D personnel with an average age of more than 15 years. Under the background of the rapid development of the optical fiber industry and the optical fiber to households, GRT has always adhered to the strategic principles of quality and innovation, and has gradually grown into a high-tech fiber optic company that is currently well-known in China, which integrates R&D, production and marketing, and has its own intellectual property and its own brand.
The main products of GRT are Optical Fiber Network Cards, Optical Fiber Modules, WDM devices, Optical Converter, Optical Fiber Patch Cord, and Optical Splitter. All kinds of products have passed international certification such as FCC, CE, and ROHS, as well as national industry certification, and have won a number of scientific and technological progress awards and excellent product awards. On the road ahead, GRT is committed to building China's own national enterprises, achieving the goals of "Optics Links The World, Connects Us Togetcher".

EVERFINE Corporation (Stock Code: 300306) is a professional supplier of photoelectrical (optical, electrical, opto-electronical) measurement instrument and calibration service, and leading in the field of LED & lighting measurement instrument. She is located in Binjiang National Hi-Tech Zone, Hangzhou, China, the so called Heaven Silicon Valley. EVERFINE is a National Certificated High-tech Enterprise, Supportive Member of the CIE, ISO9001 Registered Firm, Government Certificated Software Enterprise & Software Product Enterprise, and owns a Province Level High-tech R&D Center, and NVLAP accredited Lab （Lab code 500074-0) and CNAS accredited Lab (Lab code L5831). In 2013 and 2014, EVERFINE was judged by Forbes as China’s Most Potential Listed Companies.
EVERFINE has undertaken projects of National 863 programs and local government Key Science &Technology Programs for many times. EVERFINE owns more than 100 patents, including Germany, US ones. Several products were awarded as "National Outstanding Innovation", "National Independent Innovation Products" or "National Key & New Products". Meanwhile, EVERFINE is active in the standardization societies, and chaired or participated in over 30 international and domestic standards.
EVERFINE has the largest customer base in LED & Lighting industry in the world, and lead both oversea and domestic high-end market share. The products have been exported to US, Europe, Japan and other developed countries and regions. The customers include high level institutes and laboratories like NIM, UNDP, NIST, ITRI, SGS, ITS, TUV, KEMA, CTI, and famous corporations like CREE, PHILIPS, GE, OSRAM, SAMSUNG and etc.