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Mobile phones and tablet computers are used more and more for sensitive applications such as online banking and online shopping. As a result, biometric identification methods are the latest trend for unlocking mobile devices, since they offer a strong and specific protection against abuse.
Fingerprint scans are subject to falsifications to a certain extent as fingerprints change in the course of life or can be exposed to external influences. Therefore, many manufacturers now consider the iris scan as the new biometric unlocking method. The eye is illuminated with infrared light and the camera on the device takes a picture of the iris so that its characteristic features, which are unique for every person, can be identified. The result is then compared with the stored iris pattern. With an error rate of less than one percent, the iris scan is not only fast, but also a very safe method of identification.
Presenting its first infrared emitter with a wavelength of 810 nm, innovation leader OSRAM Opto Semiconductors now also paves the way for compact energy-saving designs for reliable iris scanning functionality on mobile devices. The new IR OSLUX SFH 4780S clearly sets new standards, achieving record radiant intensity values with a narrow emission angle from very small dimensions at a height of only 2.4 mm.
An iris scanner consists of an LED and an image sensor with an optical filter to suppress ambient light effects mounted next to it. The reliability of the iris recognition stands and falls with the contrast of the captured image, which depends on the color of the eye and the wavelength of the light source. The typical wavelengths for iris scanners are approximately 760 to 850 nanometers. A wavelength of 810 nanometers is considered a good compromise, as it allows good results for all eye colors. The IR OSLUX SFH 4780S is the first IRED from OSRAM Opto Semiconductors offering this new wavelength and at the same time the best performance-to-size ratio currently available, perfectly meeting the specific conditions for iris recognition in mobile devices.
Long-established for visible lighting applications in mobile devices, the OSLUX range has now been extended to include infrared emitters.