The latest reflector lens for high power offroad car LED lights26-11-2015
ESCATEC, one of European leading vendors of contract design and manufacturing services, has designed a next generation, miniaturised TIR (Total Internal Reflection) lens for high power offroad car LED lights. About a twentieth of the size of current TIR lenses, ESCATEC next generation TIR lens is mounted directly onto the bare LED and secured in place with special clear optical glue. This connects the two items together with no air gap for optimal optical coupling, ensuring that the light is transferred from the LED to the TIR lens with minimal sideways losses, giving an optical efficiency of up to 95% of light being directed out of the front of the lens.
Current TIR lenses are designed to fit onto packaged LED lights. So it cannot achieve the high level of optical coupling of the new design. They typically also have a much greater diameter of 20mm and height of 20mm while the next generation TIR lens can be as small as 4mm diameter and 4.5mm high. The new TIR lens can be made from PMMA, silicone or glass depending on how much heat it has to withstand.
The next generation TIR lens was developed to match ESCATEC latest Heat Spreader solution which enables high power LED lights to be packed closely together and passively cooled at power densities of up to 10W per mm2. The combined packing densities of the LED lights and TIR lenses sets a new standard for ultra-bright, compact, lightweight lighting solutions such as LED stage lights, LED search lights and even microscope lighting. Not only do these new solutions require much less power but they also have a longer operational life of up to 50,000 hours compared to 2,000 hours for a comparable Xenon (HID) lamp.
ESCATEC has a reference design available with 20W LEDs fitted within an area of 1.4mm by 1.7mm that results in an adjusted beam of 10W light power with only +/-12 degrees of dispersion.
The new TIR lens match Escatec Heat Spreader solution, providing high brightness while passively cool at power densities of up to 10W per mm2.