Infrared LED helps unlock smartphone biometric identification
The IREDs are the only ones capable of the high power demands required for iris scanning in a compact mobil devices.
Secure methods for unlocking cell phones and tablet computers are gaining in importance because these devices are being used more and more for sensitive applications such as online banking and online shopping. Manufacturers are turning more and more to biometric identification. In addition to fingerprint scans, many manufacturers are now considering iris scanning. The new biometric unlocking method involves illuminating the eye with infrared light. The camera on the smartphone simultaneously takes a picture of the iris in which characteristic features are then identified.
The Oslux SFH 4780S light emitting diode from Osram’s subsidiary Opto Semiconductors claims to offer the best size to performance ratio and for the first time opens up compact and reliable iris scanning for mobile devices. The device is 2.4 mm high and achieves a typical radiant intensity of 2900 milliwatts per steradiant – a combination that at present only this infrared LED can provide.
The Oslux SFH 4780S has a wavelength of 810 nm which enables the iris scanner to identify iris patterns for all eye colors – brown, blue, green and gray – with a high degree of reliability. The light source is also efficient and does not drain the mobile device batteries. For developing the IRED Osram Opto Semiconductors received the 2015 Kaiser Friedrich Research Award.
Related articles and links:
www.osram-os.com
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