Osram Opto Semiconductors GmbH of Regensburg, Germany says that its new Oslon Black SFH 4715A 850nm-wavelength infrared LED (IRED) offers a typical electro-optical efficiency of 48% – a figure never before achieved with opto-electronic elements, it is claimed. It also achieves a substantial reduction in cooling requirements, providing much longer service life. Also, another new product in the Oslon Black family, the SFH 4716A, has a beam angle of 150°, permitting particularly narrow-angled imaging for camera-based lighting applications by using reflector optics.
The SFH 4715A’s high typical electro-optical efficiency of 48% is possible due to the firm’s latest chip generation and the optimized package (measuring either 3.85mm x 3.85mm x 2.29mm or 3.85mm x 3.85mm x 1.51mm). “We are not aware of any other opto-electronic component with an optical efficiency to rival this,” says product marketing manager Sevugan Nagappan. Due to a boost in optical output to 800mW at 1A (previously 630mW), the new IRED can illuminate objects over 100m away, depending on the application and type of external optics. This higher output also generates more light, improving the image in the process. The new SFH 4715A can almost match a laser diode in terms of efficiency, allowing for greater ranges than the previous members of the Oslon Black family. “The same range can be achieved with fewer components – yielding a significant cost benefit,” Nagappan says, adding that the system cooling requirements have also been reduced (thermal resistance is 11K/W maximum).
Use in camera-based outdoor security systems
The new A-version of the SFH 4715 IRED, with its much higher output and beam angle of 90°, will replace the previous Oslon Black SFH 4715. ESD (electrostatic discharge) protection for up to 2kV and extended corrosion-resistance make the new IRED suitable for outdoor applications, e.g. in CCTV systems.
150° beam angle for efficient injection into reflector optics
The SFH 4716A is the second new high-flux IRED in the Oslon Black family. It can inject light into reflector optics very effectively and has a beam angle of 150°. It rounds off Osram's product portfolio as a light source for applications requiring efficient imaging.
