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在指纹采集领域,光学指纹采集技术是目前应用最广泛的指纹采集技术。其原理是采集仪根据指纹乳突线与小犁沟的几何特性、物理特性等特征的不同,利用光源光线照射到压有指纹的玻璃表面形成不同的反射光线,反射光线再经过凸镜聚焦后由CCD或者CMOS去捕获成像。
In the field of fingerprint collection, optical fingerprint acquisition technology is currently the most widely used fingerprint acquisition technology. The principle is that according to the difference of the geometric characteristics and physical characteristics of the mastoid and small furrows, the collecting instrument irradiates the surface of the pressed glass with different light to form different reflected light, and the reflected light is focused by the convex mirror Capture imaging by CCD or CMOS.