Identix Corporation

Idnetix Incorporated

Daniel Frederick Maase

Thomas F Sartor

David Eugene Stoltzmann

Bryan Scott

John David Hamre

Apparatus and methods for providing an optically based planar scanner for generating an image are provided. In one embodiment, the apparatus includes a switchable Bragg grating. An area of the switchable Bragg grating is configured to be activated to direct light to a platen. The platen is configured to reflect the light to a waveguide or to refract the light. The light reflected to the waveguide is guided to a light detector. By activating a number of the areas of the switchable Bragg grating and measuring the intensity of the light with a light detector, an image of an object contacting the platen may be formed.

Optically based planar scanner

Systems, devices and methods for providing rolled fingerprint capture and palm capture capability in a device having reduced size are provided. In certain embodiments, the systems and methods provide capture of rolled fingerprints, slap fingerprints and palm prints in one continuous workflow in a compact device. In certain embodiments, moisture discriminating optics and/or enhanced definition image formation previously achieved only in devices designed for capturing only fingerprints are provided. In certain embodiments, the systems employ a single scanning device to capture 500 ppi and/or 1000 ppi palm and fingerprint images.

High performance multi-mode palmprint and fingerprint scanning device and system

A system for optically imaging an object includes an optical platen having an object receiving surface. The object receiving surface is illuminated by a multi-color light source, and a color imaging system forms an image of the object on the object receiving surface.

Multi-color illumination device in fingerprint imaging system with microprism diffuser

High performance fingerprint imaging system

The invention provides a movable cover for a finger receiving surface of an optical platen in a fingerprint imaging device. A heater incorporated into the platen cover applies controlled heat to the finger receiving surface when the cover is closed over the platen. Maintaining the finger receiving surface within a selected temperature range that is at about skin temperature helps to inhibit condensation of moisture from a subject's fingers onto the finger receiving surface.

Heated optical platen cover for a fingerprint imaging system

A fingerprint image capture system reduces tip smear by ceasing to update a data array characteristic of the rolled fingerprint image behind an advancing freeze column at least about half way from the trailing edge to the leading edge of a finger contact strip.

Method and device for reducing smear in a rolled fingerprint image

A device for providing a plain image signal indicative of a plain image of surface characteristics of more than one finger on a hand includes an plain platen prism having a flat, rectangular shaped finger receiving surface having a platen aspect ratio greater than 1.33:1. An illumination source internally illuminates the finger receiving surface such that light internally illuminating a bare portion of the finger receiving surface is internally reflected from the finger receiving surface and light internally illuminating a contacted portion of the finger receiving surface in contact with the fingers is not internally reflected from the finger receiving surface. The internally reflected light forms a reflection image of the surface characteristics of the fingers. Optical elements direct the reflection image to a camera. The camera, which has a rectangular receiving surface with an aspect ratio of approximately 1.33:1, receives the reflection image and provides the plain image signal in response. The directing optical elements include refracting elements structured and arranged to change the aspect ratio of the reflection image to approximately equal the camera receiving surface aspect ratio.

Device and method for obtaining a plain image of multiple fingerprints

An electro-optic palm scanner system employing a non-planar platen for obtaining high quality palmprints and heelprints. The platen includes an upper contact surface having a convex portion for contacting a palm to be imaged, and a planar portion for contacting the heel of the hand. The imaging system includes an optical carriage movably secured to a frame. The carriage supports a light source, lens system, and light detector. Total internal reflection occurs when light is incident on the platen at an angle greater than a critical angle of the platen, providing identifying information. The detector may include a linear CCD array which detects ridges and valleys in the hand to obtain image data. The image data is processed and the corresponding print of the heel or hand may be displayed on a video screen, and stored. The images of the palm and heel may be merged to form a single image.

Growing community of inventors

Campbell, CA, United States of America

Daniel Frederick Maase