How to choose LED lens material
LED lamp bead itself has a large heat generation, and emits a direct beam of light, which has a limited irradiation range and is harsh to the eyes. LED lens can change the angle of light, increase the irradiation range, to indirectly realize the effect of soft light, while the loss of light efficiency is also very low, to achieve the special irradiation effect of different occasions. As LED lamps and lanterns are more and more widely used in lighting applications, the lens as one of the key components of the LED, but also with the rise of the boat like hot up. At present, the lens material used in the industry is mainly PC, PMMA, quartz glass. Depending on the requirements of different products and end brands, different types of materials are used.
Manufacturers of commercial and industrial LED luminaires face many challenges. Lighting designs must be practical, attractive and lightweight, while also providing high luminous efficacy and light uniformity. To meet these complex criteria, manufacturers look for materials that offer design flexibility. Due to the design advantages of PC for complex corners, snaps and notches, as well as its excellent durability and strength, PC clearly outperforms glass and PMMA in this area of LED lens applications.
In LED lighting fixtures, the lumen value (brightness) is a very important assessment standard, to achieve high lumen value is mainly to increase the lamp beads and the use of high transmittance materials. Taking into account the LED lamp bead heat, increase the lamp bead to increase the heat dissipation function, and the lens material temperature resistance and flame retardant have higher requirements, apply higher transmittance material is undoubtedly the best solution.
In addition, LED designers have to face another challenge is how to optimize the release of light inside the optical system. If not properly designed, the light output can be reduced, generating unnecessary heat and thus reducing the reliability and lifetime of the device.
SABIC has developed LEXAN LUX with lighter weight, stronger mechanical properties, improved aesthetic appearance and greater design freedom. Lenses made from LEXAN LUX have a high refractive index (90%), which helps to optimize light extraction, and it is also possible to integrate the reflector into the LED module, resulting in thinner lenses and lighter designs.
In addition, due to the exceptionally long lifetime of LED devices (up to 10-15 years), lifetime is also a key factor for LED components and materials.
For more questions, please contact professional LED manufacturer recolux