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VCSEL device improves security camera performance

Posted: 05 Jul 2006     Print Version  Bookmark and Share

Keywords:TT electronics  Optek  OPV330  VCSEL  vertical cavity surface emitting laser 

TT electronics Optek Technology has developed a vertical cavity surface emitting laser (VCSEL) device that promises to improve performance of security cameras. According to the company, the new device uses lower drive currents to achieve the same power output as conventional infrared LEDs.

Designated the OPV330 series, the VCSELs feature high thermal stability and low drive current, making them suitable for lower power consumption applications such as battery-operated equipment.

According to Dave Birtalan, VP of the company's components business unit, VCSELs offer many advantages in sensing applications in comparison to infrared LEDs, particularly those involving security cameras. "VCSELs can achieve much greater distances with lower power consumption than infrared LEDs. Typically only eight, and even as few as four, VCSEL components are needed to replace up to 20 IR LEDs," said Birtalan.

"Because of their narrower beam, VCSELs also produce less unwanted reflections in narrow spaces, as well as better long distance visibility and clarity, making them ideal for night-time security cameras in unlit spaces," Birtalan added. The primary advantage of VCSEL devices compared to conventional IR LEDs is their higher apertured power output, which enables enhanced operation in many transmissive and reflective applications, he said.

Additional applications for the device include non-contact position sensing, photoelectric sensors, optical encoders and light curtains. The flat lens lateral packaging allows the device to be used with secondary optics to create custom beam profiles, Birtalan explained. The device is optically and spectrally compatible with Optek's standard detector products.

The OPV330 series is an 850nm VCSEL device. Maximum forward peak current is 20mA, with a maximum reverse voltage of 5V. Operating temperature range is -40°C to 85°C.

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