초록 ▼

An optical imaging device such as a fingerprint imager has a platen formed of a plurality of parallel prisms and a light source for illuminating a portion of the platen. An optical sensor is disposed so as to receive light from the light source reflected off a surface of the platen and directed towa

An optical imaging device such as a fingerprint imager has a platen formed of a plurality of parallel prisms and a light source for illuminating a portion of the platen. An optical sensor is disposed so as to receive light from the light source reflected off a surface of the platen and directed toward the optical sensor. The platen is mounted moveable relative to the sensor so as to allow scanning of a fingertip in contact with the platen during relative motion of the platen and the sensor. Preferably, the platen is formed of a microprism structure.

대표청구항 ▼

[ What is claimed is:] [1.] A biometric imaging device comprising:an optical sensor for detecting incident light and for providing a second signal in dependence upon incident light, the optical sensor having an optical sensor rate for capturing a predetermined area;a light source for providing light

[ What is claimed is:] [1.] A biometric imaging device comprising:an optical sensor for detecting incident light and for providing a second signal in dependence upon incident light, the optical sensor having an optical sensor rate for capturing a predetermined area;a light source for providing light to the optical sensor along an optical path;a platen comprising a plurality of prisms, the platen disposed within the optical path for reflecting a portion of light incident thereon along the optical path toward the optical sensor;wherein at least one of the optical path and the platen is moveable relative to the other to provide relative movement independent of the optical sensor rate; and,a motion sensor for sensing relative motion between the platen and the optical path and for providing a first signal in dependence thereon.