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Design and Construction system for recording Finger print by laser, and separted the signal to noise by holographic element, was done. For safety, total reflection lighting ensures hat aser earns an not enter An operators eyes. Holographic diffraction grating was used instead of computer program to contrast images.
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Journal BS. Laser Finger Print Sensor with Holographic Grating : Adnan Salah . Baghdad Sci.J [Internet]. 2004Jun.6 [cited 2020Nov.28];1(2):271-3. Available from: http://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/558