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There are different light LED lens angle LED light extraction efficiency is somewhat different 1, the second lens secondary lens material generally used optical grade PMMA or PC; optional glass in exceptional circumstances. The second lens function is to light angle LED light source together again into any 5 ° to 160 ° between the desired angle, the distribution of light field can be divided into: round, oval, rectangular. The second lens and LED are two separate objects, but they are really inseparable in the application. 2, a lens with a lens generally PMMA, PC, optical glass, silica and other materials. LED chip (chip) emitting 360 degrees theoretically cob lens brand, but actually placed on the LED chip can be fixed bracket and packaging, so the chip maximum emission angle is 180 degrees (more than 180 ° range and a small amount of peripheral vision), additional chip will have some stray light, so through a lens chip can be effectively aggregation of all the light and get as 180 °, 160 °, 140 °, 120 °, 90 °, 60 ° angle of light, such as different, but different There's the light angle LED light extraction efficiency is somewhat different (the general rule is: the higher the greater the efficiency point of view). A lens is directly encapsulated (or bond) on the LED chip support, and LED as a whole. COB market competition, not just the price, is the technology to enhance competition. First power cob lens, low light efficiency, light effects on the market most of the COB between 100-110LM / W, while the other light source device can reach 160-180LM / W; secondly, high color tolerance, high volume capacity When production of many products on the market is not good color consistency cob lens quality, the same color temperature or color inside the same batch shipping high tolerance deviations. Finally, the reliability of the material needs to be improved, since the continuation of the current COB package mode uses a conventional package cob lens, high thermal resistance, low sulfidation resistance, light and dead light phenomenon is prone to high-density packaging, ceramic substrates easy to rattle, easy welding phenomena. COB lens looking good, preferred Dongguan City Chong Ming Optical Technology Co., Ltd! wholesale lens cob, cob lens, Chong Ming professional manufacturer of optical lenses cob by the Dongguan City, providing innovative Optical Technology Co., Dongguan City Chong Ming Optical Technology Co., Ltd. (www.ledtoujing.com) strong, credible, in Dongguan, Guangdong and other optical equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas Chong Ming will lead into the brilliant optics and you work for a better future!