Patent ID: 9245164
Filing Date: 2016-01-26
CPC Classification: G06K

Claim Text:
1. A biometric authentication device, for authenticating at least a biometric on a portion of a creature (portion-to-be-verified or PTBV, thereinafter), comprising: a carrier base, having an upper opening for receiving the PTBV, which the upper opening further has a base plane and at least one lateral surface; a position structure, located at the carrier base at a position respective to the upper opening, being used to assist the PTBV to anchor at a predetermined position at the carrier base in the upper opening; at least one light source unit, located at the at least one lateral surface of the carrier base respective to the upper opening; in the case that the PTBV reaches the predetermined position, the at least one light source unit being positioned laterally to the PTBV, and the at least one light source unit being able to project at least one lateral light onto the PTBV so as to generate and at least one corresponding image response; an image-sensing unit, located inside the carrier base to receive the at least one image response and further to form thereby a corresponding detection signal readable to a computer; and a light guide module and a filter, the light guide module being located inside the carrier base at a position under the base plane respective to the upper opening, the at least one image response entering the carrier base through the bottom portion of the upper opening and being further proiected onto the image-sensing unit by the light guide module, the filter being located at one of an inside of the image-sensing unit and an outside of the image-sensing unit for filtering out visible lights so as to enhance a identification rate of a particular wavelength; wherein: the at least one light source unit further includes a plurality of Infra-red Vertical-cavity Surface-emitting Lasers (IR-VCSELs), and a vertical height h the PTBV is at least a portion of a first finger member and a second finger member of a finger, the plurality of IR-VCSELs is located at a lateral side of the PTBV along a direction extended from the first finger member to the second finger member; the position structure formed as a finger-anchoring structure located on the base plane further includes a front window, a rear window and a position rib between the front window and the rear window; while an inter-member valley between the first finger member and the second finger member falls onto the position rib, the first finger member is anchored in the front window and the second finger member is anchored in the rear window, the light guide module having at least one prism unit is separated into a fingerprint-detecting area respective to the front window and a vein-detecting area respective to the rear window; when the at least one lateral light projects on the PTBV, a fingerprint image and a vein image being formed simultaneously on the image-sensing unit through the fingerprint-detecting area and the vein-detecting area of the light guide module, respectively, the image-sensing unit then generating the detection signal readable to the computer and having messages of the fingerprint image and the vein image; the light guide module has one single prism unit separated into the fingerprint-detecting area and the vein-detecting area; the fingerprint-detecting area of the prism unit further includes thereof a top surface, a bottom surface opposing to the top surface, an imaging surface connecting in-between the top surface and the bottom surface, and an anti-reflection surface opposing to the imaging surface, the top surface being neighbored to the front window of the position structure; when the PTBV is anchored at the predetermined position in the upper opening, the first finger member of the finger contacting the top surface of the fingerprint-detecting area, the fingerprint image entering the fingerprint-detecting area of the prism unit via the top surface of the fingerprint-detecting area, the fingerprint image being reflected at least once by the bottom surface of the fingerprint-detecting area and then leaving the prism unit through the imaging surface of the fingerprint-detecting area, an oblique angle of the imaging surface of the fingerprint-detecting area helping the leaving fingerprint image to form on the image-sensinq unit, the anti-reflection surface being there to reduce the reflection while lights in the fingerprint-detecting area are projected onto the anti-reflection surface; and the vein-detectinq area of the prism unit further includes thereof another top surface, another bottom surface opposing to the another top surface, another imaging surface connecting in-between the another top surface and the another bottom surface, and an reflection surface opposing to the another imaging surface and connecting obliquely the another bottom surface; the top surface of the vein-detecting area being neighbored to the rear window of the position structure; when the PTBV is anchored at the predetermined position in the upper opening, the second finger member of the finger being above the top surface of the vein-detecting area without any contact in between, the vein image entering the vein-detecting area of the prism unit via the top surface of the vein-detectinq area, the vein image being reflected at least once individually by the reflection surface, the top surface and the bottom surface of the vein-detecting area and then leaving the prism unit through the imaging surface of the vein-detecting area, an oblique angle of the imaging surface of the vein-detecting area helping the leaving vein image to form on the image-sensing unit; an imaging optical path of the vein image being dependent on a vertical height between the top surface and the bottom surface of the vein-detecting area and a reflection frequency of the vein image inside the vein-detecting area, in which the reflection frequency is determined by the oblique angle between the reflection surface and the bottom surface of the vein-detecting area.