850nm IR diode illuminates camera surveillance

6th August 2015
Nat Bowers

Suited for security applications such as camera surveillance, Osram Opto Semiconductors has introduced an InfraRed Emitting Diode (IRED) with an 850nm wavelength. The Oslon Black SFH 4713A supports efficient designs for near-range illumination from 10 to 50m (approximately 30 to 200ft), compared to previous Oslon Black high-flux IREDs which were designed for systems with a range of up to 100m.

Infrared short- to mid-range lighting systems are the target application for the SFH 4713A. To create its new IRED, Osram transferred the high-performance technology behind its Oslon Black, with an optical output of over 1W, to the mid-range power class of approximately 760mW, rounding off its portfolio. Currently this IRED is available with a beam angle of 90°.

The IREDs are the result of advances in chip and package technology - developments that enabled Osram, less than a year ago, to engineer an Oslon Black with unprecedented electro-optical efficiency. The SFH 4713A now makes these advances available in the mid-range power classes as well.

Rajeev Thakur, IR Product Marketing Manager, Osram Opto Semiconductors, explains: “With this new version of the Oslon Black, our customers can use the same designs they did before for high-end, long-range applications to engineer systems with mid- to short-ranges, all while cutting costs.”

The high-efficiency IRED offers an optical output of 760mW at a current of 1A. Two to five IREDs are typically adequate for achieving ranges between 10 and 50m. Due in part to the smaller chip size, the IRED is a lower-cost alternative to Osram’s SFH 4715A for systems with mid-range output requirements.

In autumn 2015, another variant - the SFH 4714A, with a beam angle of 150° and an optical output of 720mW - will complement the SFH 4713A. These new components close the gap between the extremely small Oslon Compact, with 270mW at 0.5A, and the high-output Oslon Black versions with optical outputs of more than 1.135W at 1.5A. The result is a product portfolio of high-efficiency 850nm IREDs that serves the entire spectrum of infrared lighting applications and output requirements.

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