Digital fingerprint identification assembly for biometric field, has three lenses with dielectric film so that light from lighting devices is partially reflected by fingerprint and penetrates partially two lenses to be collected by detector

摘要

The assembly has a laminated lens (2) with three lenses (21, 23, 24), where the lens (24) is formed jointly with the lens (21, 23). Each of the lenses (21, 23, 24) is applied with a dielectric film. Lighting devices (3) are located on a lower part of the lens (2). A detector (4) is located below the lens (2) to collect an image of a digital fingerprint on an upper part of the lens (2). The film is applied such that the light from the devices is partially reflected because of a pattern of the fingerprint and penetrates partially through the lenses (23, 24) to be collected by the detector.