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Erschienen in:
2014 | OriginalPaper | Buchkapitel
An Effective Optical Component to Increase the Illumination Uniformity of Extended LED Light Source
verfasst von : Yonghua Tang, Weiqi Yuan
Erschienen in: Biometric Recognition
Verlag: Springer International Publishing
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The design of light source is crucial for the availability of palmprint, hand shape and high quality image of Handmetric identification. After the small (small lighting area, Gao Liangdu) LED light source is added at the front end of an appropriate optical component, it may assist to redistribute the LED flux in receiving specific distant source within a specific range. It may also favor in reducing the volume of light source. Such can be done during the improvement of the uniformity of illumination. The light’s utilization of surface is also objective. This paper analyses in detail of the track’s changes before and after the light through optical components by comparing the use of flux distribution and optical component. The results show that the uniformity is improved after luminous flux component’s distribution.