Identity recognition technology - iris recognition
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The technology is based on the iris in the eye for identity recognition[/url], and is used in security equipment (such as access control) and places with high confidentiality requirements. The structure of the human eye is composed of the sclera, iris, pupil lens, retina and other parts. The iris is located in the black pupil The circular part between the iris and the white sclera contains many interlaced spots, filaments, crowns, stripes, crypts and other detailed features. Moreover, after the iris is formed during the fetal development stage, it will remain unchanged throughout the life course. These characteristics determine the uniqueness of the iris characteristics and also determine the uniqueness of identity recognition. Therefore, the iris characteristics of the eye can be used as the object of identity recognition for each person. In Hollywood blockbusters, everyone must still remember the cool scene of opening a confidential room or safe by scanning the retina of the eye! The use of iris recognition technology provides a high degree of security for places that require high confidentiality. On July 10, 2018, WPG Holdings, a leading semiconductor component distributor dedicated to the Asia-Pacific market, announced that its subsidiary Pinjia is promoting OSRAM's iris recognition application solution. The SFH 4787S from OSRAM, represented by WPG, can evenly illuminate the eye, so iris recognition software now almost no longer needs to correct artifacts. Like the previous SFH4786S version, the emission direction of this LED is not vertical, but slightly tilted, so the usual mechanical aids are not required, thus simplifying the design process. The solution has currently been cooperated with companies such as Zhongke Hongba, Shima Dahua, Siyuan Kean and DELTA. The third generation of OSRAM IREDs for iris recognition meets another requirement for this application: Ideally, brightness differences in the camera image should only come from the iris, and no additional brightness differences should be caused by the illumination gradient. This means that the software only has to correct for fewer artifacts when determining the iris. With the SFH 4787S, OSRAM has developed a planar light emitter with an optimized reflector and lens that achieves a very stable intensity of the emitted beam. Apart from this, the SFH 4787S is virtually identical to its predecessor, the SFH 4786S. Both are based on the compact Oslux package with large dimensions of 3.5 x 3.5 x 1.6 millimeters. The wavelength of 810 nanometers (nm) provides high-contrast images of all eye colors. The emission direction is tilted by 8°, with an emission angle of ±18°. At 1A, the high-efficiency emitter has a light output of 720 milliwatts (mW) and a radiant intensity of 1,000 milliwatts per steradian (mW/sr). Figure 1 - System solution diagram of OSRAM iris recognition application solution promoted by GD Pinjia Solution Features Iris recognition is currently the safest and most accurate identity recognition technology. Iris recognition technology determines people's identities by comparing the similarities between iris image features. Its core step is to use pattern recognition, image processing and other methods to describe, match and classify the iris features of the human eye, thereby achieving automatic personnel identity authentication. OSRAM Opto Semiconductors' new SFH 4787S infrared LED emits planar light, achieving extremely uniform illumination and simplifying access control applications, so that iris scanners can easily detect the unique iris in the eye. Specifications - High-efficiency R light source;
- Double-stack emitter;
- Low thermal resistance (max. 25 k/W);
- Centroid wavelength 810 nm;
- Small package size (LXWXH): 3.5mm×3.5mm×1.6mm;
- Narrow half angle (+/- 18°) / 8° tilt.
Applications - Smart phones (Gome U1, K1…);
- India’s new generation ID card integrates iris information;
- Entry and exit (UAE, UK, Netherlands, etc.);
- Bank ATM iris withdrawal (Middle East).
Figure 2 - Application photo of OSRAM iris recognition application solution promoted by WPG
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