Opto-Electronics


IR LED suits gesture recognition

24 July 2013 Opto-Electronics

The new infrared light emitting diode (IRED) Oslon black SFH 4716S from OSRAM Opto Semiconductors is one of the most powerful on the market with an optical output of 1030 mW.

With a beam angle of 150 degrees this IRED offers perfect illumination at a range of a few metres. It is therefore ideal for gesture detection systems linked to computer games or for optical safety systems in the automotive sector. But its capabilities extend further; with external optics and tight focusing even distant objects can be perfectly illuminated with infrared light.

The new Oslon black is ideal wherever gesture detection is involved. The high-power IRED illuminates the relevant area so that a camera sensor can detect movement which will then be used to control a computer or enter text. The wide beam angle of 150 degrees ensures that the near-field area is uniformly illuminated and gestures are reliably detected. Text can therefore be entered, for example, even if the hand is a few centimetres away from the keyboard.

The SFH 4716S is also certified in accordance with automotive standards so it can be used in safety-related applications such as driver monitoring or seat occupancy detection systems in vehicles. The emitted light with a wavelength of 850 nm is suitable for camera sensors but is barely visible to the human eye and therefore is not considered annoying.

The device’s high optical output of 1030 mW is achieved at an operating current of 1 A with an efficiency of around 35%. This performance is based on stack technology with which Osram provides each chip with two emission centres, thereby doubling its output. Oslon black achieves a radiant intensity of up to 225 mW/sr.

The high optical output of the Oslon black also makes it suitable for combining with external reflectors. In this type of application, the reflector shapes the beam so that it can be tightly focused by an additional lens. This makes it suitable for surveillance systems and monitoring systems that operate with additional infrared illumination.

For more information contact Ryan Hunt, OSRAM Opto Semiconductors, +27 (0)79 525 1779, r.hunt@osram.com, www.osram-os.com



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