Optoelectronics

IR LEDs suit security camera applications

9th September 2018
Mick Elliott

The SFH 4718A infrared LED (IRED), part of the IR OSLON Black family from OSRAM Opto Semiconductors is now being shipped by Mouser Electronics. The small but powerful IRED is the first in the family to feature a narrow beam angle of ± 25 degrees, enabling illumination units for camera systems with a medium capture range without requiring secondary optics.

Adding the OSRAM SFH 4718A IRED means the OSLON Black portfolio now comprises three wavelengths (810nm, 850nm and 940nm) and three beam angles (±25, ±45 and ±75 degrees), with optical outputs ranging from 0.3W to 2W.

Optical output is 0.8W at 1A, and radiant intensity is 730 W/sr. The device’s 850 nm wavelength is barely discernible by humans, but lies within the sensitivity range of the camera sensors.

The IREDs come in a small 3.75 × 3.75mm package with a low thermal resistance of 16 K/W (max) and electrostatic discharge (ESD) protection to 2kV, and it is ideal for a range of security and recognition applications, including 3D image capture and facial-scan access control.

Engineers can also use the IREDs in systems to illuminate areas monitored by closed-circuit television (CCTV) systems, as well as for automatic license plate recognition systems.

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