6 May 2010


Integrated lens for Osram Opto's IR DRAGON LED boosts radiant intensity by 3.5x

Osram Opto Semiconductors GmbH of Regensburg, Germany has launched the DRAGON SFH 4236 infrared (IR) LED, which has an integrated lens that concentrates the emitted infrared light within a viewing angle of +/-20°.

Picture: Drowsy driver monitoring systems can benefit from the IR DRAGON SFH 4236's high radiant intensity and small dimensions.

This boosts typical radiant intensity to 650mW/sr at a DC current of 1A, more than three times that of its standard IR DRAGON SFH 4232. The IR DRAGON family consists of the standard version SFH 4232, the stack version SFH 4235 with twice the total radiant flux, and now the new SFH 4236 with integrated lens.

The integrated lens also eliminates the need for a complex, expensive external lens assembly (which previously have been necessary to achieve a narrow beam angle). "The total height of the new SFH 4236 is about 35% smaller compared to conventional DRAGON solutions with an external lens," points out Harry Feltges, marketing manager Infrared Devices.

With the same small footprint as other IR DRAGON devices (enabling use as a drop-in replacement in existing designs), the new SFH 4236 IR DRAGON is designed for applications with limited board space that require narrow radiation characteristics, says Osram Opto. The SFH 4236 also shows the same electrical parameters as the standard IR DRAGON and is suitable for reflow soldering.

IR DRAGON LEDs emit at a wavelength of 850nm, which is the best compromise between maximum spectral sensitivity for CCD and CMOS cameras and suppressed visibility for the human eye, says Osram Opto. Suitable applications are camera-based vision systems for the industrial and security sector, as well as applications in the automotive sector such as driver and passenger monitoring systems for cars and trucks and blind-spot detection systems.

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