IR LED for discreet security applications

Opto-Electronics

6 March 2013 Opto-Electronics

Concealed security systems, such as those installed in banks, on machinery and at border controls, need to be designed so they are unobtrusive. This is a major challenge for infrared illumination in such applications because the 850 nm LEDs that are most often used here appear as weak dots of red light, especially in dark environments.

The solution is to switch to a wavelength of 940 nm, which the human eye is 130 times less likely to notice. Camera sensors, however, can easily detect this invisible radiation.

The Oslon black SFH 4725S from Osram Opto Semiconductors is designed specifically for such applications. This compact infrared LED provides 940 nm light with a high optical output of 980 mW from an operating current of 1 A. Behind this performance lies Nanostack technology, through which Osram has succeeded in providing two emission centres in one chip, almost doubling the light output.

Measuring 3,85 x 3,85 x 2,29 mm, the LED achieves a radiant intensity of 450 mW/sr at an emission angle of 90 degrees and therefore provides excellent illumination over the area being monitored. Radiant intensity indicates the light output within a solid angle segment and therefore defines the intensity of the light beam. The black package ensures that the component is completely concealed behind the camera lens.

For more information contact Ryan Hunt, OSRAM Opto Semiconductors, +27 (0)79 525 1779, [email protected], www.osram-os.com

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IR LED for discreet security applications

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