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FINGERPRINT IMAGE ACQUISITION DEVICE

Summary

A fingerprint image acquisition device includes: a light source, a finger touching surface, a convex lens, an image sensor and a grating. The light source is a surface light source, and the grating is disposed on a light output surface of the light source. The light source is configured to emit a light beam, the grating is configured to change a propagation direction of the light beam to form a detection light beam, the finger touching surface is configured for a user to place a finger thereon to reflect the detection light beam and thereby obtain a reflected light beam, the convex lens is configured to focus the reflected light beam on the image sensor, and the image sensor is configured to generate a fingerprint image based on the focused reflected light beam.

Technology Benefits

The invention can make the structure of the fingerprint image acquisition device be more compact.

Technology Application

Lighting

Application Date

2016-06-25

Application No.

US15/193006

Classes

G06K9/00 | H04N5/335

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