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Infrared LED enables security surveillance over large distances

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By eeNews Europe


The Dragon Dome is the first high-power infrared LED that emits its light within a narrow angle of +/- 12°. From a current of 1A it achieves a total radiated power of 430 milliwatts (mW) and therefore a radiant intensity of 2.3 watts per steradiant (W/sr). At this radiant intensity the beam of light will have a usable range of more than 100 meters, depending on the sensitivity and field of view of the camera. Radiant intensity is measured in watts per steradiant. It indicates the light output within a solid angle segment. The high total radiated power of the IRED is thanks to state-of-the-art thin-film technology which enables the light to be extracted extremely efficiently from the chip.

This high radiant intensity benefits applications that need strong focused light to provide reliable illumination over large distances, including outdoor CCTV surveillance systems at border crossings and airports. With a wavelength of 850 nm the emitted light is well suited to camera sensors but is barely perceptible to the human eye. This means that surveillance can be very discreet.

The narrow light beam is produced by the deep metallic reflector and the integrated optics of the Dragon Dome. The lens translates into less time and expense for our customers because they do not need an external lens to focus the light. This reduces installation time and system costs in the relevant application, and also enables the overall design to be made extremely compact. The SMT (Surface Mount Technology) package, which is compatible with other Dragon designs, is suitable for reflow soldering processes and helps make handling even easier and further reduces production costs.


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