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High-speed 850nm IR emitters suit security cameras

Posted: 27 Jun 2008 ?? ?Print Version ?Bookmark and Share

Keywords:IR emitter? infrared? CCTV? security camera?


Vishay Intertechnology Inc. has expanded its optoelectronics portfolio with 850nm IR emitters optimized for IR illumination for CMOS and CCD cameras used in CCTV security applications; high-speed IR data transmission in home entertainment surround-sound systems, museums, and concert halls; and for particle detection in smoke detectors.

The TSHG5210 and TSHG6210 are available with 10 viewing angle while the TSHG5410 and TSHG6x10 devices are available with a 18 viewing angle. The emitters offer high radiant intensity with low forward voltage in 5mm leaded packages.

For security camera illumination, the emitters' high radiant intensity of 230mW/sr at 100mA for the 10 devices and 90mW/sr at 100mA for the 18 devices provide longer illumination distance and greater resolution. In addition, the emitters are claimed to show the lowest degradation over time. Where some competing emitters degrade up to 60 percent in one year, Vishay's emitter intensity remains virtually unchanged.

For high-modulation operation, the new emitters feature switching times of 20ns, supporting data transmission rates up to 16Mbit/s. For smoke detectors, the higher radiant intensity of the 10 devices allows for lower current operation to extend battery life.

While many emitters are only suitable for 50mA operation, Vishay's TSHG5x10 and TSHG6x10 devices provide 55mW optical power at 100mA. The emitters offer high power output, with a forward voltage of 2.3V at 1A and 1.5V at 100mA. To control the height of the emitter when inserted into the PCB for soldering, the TSHG5x10 devices feature a standoff. The devices are Pb-free in accordance with WEEE 2002/96/EC and RoHS 2002/95/EC.

Samples and production quantities of the new IR emitters are available now, with lead times of four to six weeks for large orders.

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