No sport event without a proper illumination. And for powerful LEDs glass optics are the best choice. When combined in an array the performance can be easily scaled up. We will tell you more about that in this newsletter. We like to discuss your specific requirements during the LpS in Bregenz or regarding our Automotive products during ISAL in Frankfurt (for dates see below).
Have a nice summer season, we are looking forward to seeing you soon.
Auer Lighting Sales Team
P.S.: Our company flyer is all new. Check it out here.
Today, the conversion of most illumination applications to LED light sources is ongoing. The use of LEDs offers several advantages as for example high efficacy but also introduces some changes to conventional light sources: LEDs are smaller but also emit less light flux compared to traditional solutions. For high power applications two different approaches are feasible. The first one –with COB (chip on board) LEDs – uses large boards densely packed with an array of many small LED dies. The size of the board is determined by the required luminous flux and the flux density of a single LED die. Typical diameters of such COB LEDs are up to 30 mm. This large light emitting diameter has some implications on the size of the optic. Generally speaking: the larger the light source the larger the optic. Due to this restriction COB LEDs are often used for general lighting with less sophisticated light distributions. The second approach for higher power applications is the use of many distinct LEDs with individual optics. Here, the size of the optic is determined by the size of the single LED, typically in the range of a few millimeters. In the final application many sets of LED + optic are arranged in an array configuration. For easier system assembly the optics can be combined in a lens plate (see Fig. 1) while the LEDs are arranged on a larger LED board.
Typical applications of lens plates require luminous fluxes above 10 klm with a highly defined light distribution of the luminaire. Samples may be street lighting, flood lights for sport arenas or architectural areas. What are the advantages of the latter approach? First of all, with smaller light sources many freedoms in terms of the light distribution can be realized. The application may be non-rotationally and highly asymmetric with defined illuminance distributions. This can be a homogenously illuminated square on a floor or wall, but also asymmetric light. Due to the high power of up to several hundred Watts the application is still challenging: Conventional polymers exceed their thermal limits and are quite vulnerable to optical degradation (caused by the LED itself or by natural light of the sun). This can be circumvented by the use of glass. Our SUPRAX® borosilicate glass is ideal for high power applications and can be perfectly used for the production of lens plates. Combined with our optical design experience we will also solve your illumination task. Feel free to ask.
Fact of the month
Our world-wide network: We serve customers in 47 different countries on all continents (excluding Antarctica as per today).