Ultraviolet (UV) radiation has been used for many years in the industrial and health field. Nowadays, the new generation of LED appears to be challenging traditional sources of UV fluorescent lamps. 1.What is the wavelength range of UVC LED? The UVC LED wavelength is usually defined as 200nm to 280nm. 2.What is the “sterilization range” of ultraviolet light? According to the International UV Assoc...

(Continue The Development of Chinese Optics (Ⅰ)) The development of Chinese optics mainly depends on the "scientific talents" cultivated by itself. In 1952, Mr. Wang was transferred to the Changchun headquarter science academy instrument pavilion (by Changchun optical machine institute) work. A few years the institute had been assigned to hundreds of the optical professional graduates, is Chinese ...

In 1948, when Mr. Wang returned to China, the old China had only small workshops and some capable craftsmen to repair or assemble the optical instruments on the guns. At that time, the only optical factory is in Kunming, Yunnan, named after the state-owned 298 factory, about 500to 600 people. They mainly serviced for weapon and guns, can make some simple military optical instruments, such as binoc...

(conyinute UV LED Reliability Research (Ⅰ)) Ⅳ、Summarize From UV LED discrete devices and integrated module two aspects carries on the analysis shows that, the transmittance (UV light), air tightness, from several aspects, such as electrical and thermal performance, inorganic packaging materials is better than the organic packaging materials. Therefore, the use of organic material for UV LED device...