Iris capture device having expanded capture volume
First Claim
1. An iris image capture device having an expanded capture volume comprising:
- two lens systems comprising;
a first lens system; and
a second lens system;
wherein said first lens system and said second lens system are offset from one another in one or more of a X-axis, a Y-axis, and a Z-axis and arranged to capture an iris image of at least one of a left eye and a right eye;
two illuminators comprising;
a first illuminator positioned outboard of said second lens system; and
a second illuminator positioned outboard of said first lens system;
wherein said first illuminator and said second illuminator are offset from one another in one or more of a X-axis, a Y-axis, and a Z-axis for illuminating an iris of said at least one of said left eye and said right eye, wherein said first lens system operates with said first illuminator and said second lens system operates with said second illuminator to illuminate an iris of an eye and capture an image of said iris.
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Accused Products
Abstract
An improved system and method for personal identity biometric authentication using an iris acquisition device having an expanded capture volume to enable greater ease of use, overcomes the problem of eyeglass reflections to avoid false rejections, has no moving parts thereby enhancing reliability, and achieves low cost through use of a simple design and commonly available components. The invention is directed to an apparatus, system, and method for expanding the capture volume by extending the iris image capture zone in one or more axes (X, Y, and/or Z). The iris image capture device includes a cooperating pair of lens systems and illuminators wherein each individual lens system/illuminator system has a known separation and is capable of capturing an image of either or both a right eye and a left eye of a user thereby extending am apparent width of filed in an X-axis. The lens systems of the iris image capture device can also be physically and/or optically offset from one another resulting in an extended apparent depth of field in a Z-axis. In addition, each individual lens system/illuminator system preferably has a minimum angular separation that ensures that no reflections due to eyeglasses fall onto the iris image area.
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Citations
43 Claims
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1. An iris image capture device having an expanded capture volume comprising:
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two lens systems comprising;
a first lens system; and
a second lens system;
wherein said first lens system and said second lens system are offset from one another in one or more of a X-axis, a Y-axis, and a Z-axis and arranged to capture an iris image of at least one of a left eye and a right eye;
two illuminators comprising;
a first illuminator positioned outboard of said second lens system; and
a second illuminator positioned outboard of said first lens system;
wherein said first illuminator and said second illuminator are offset from one another in one or more of a X-axis, a Y-axis, and a Z-axis for illuminating an iris of said at least one of said left eye and said right eye, wherein said first lens system operates with said first illuminator and said second lens system operates with said second illuminator to illuminate an iris of an eye and capture an image of said iris. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A system for imaging an area of an object positioned behind a light transmissive structure using an illuminator that produce specular reflections on said light transmissive structure comprising:
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a single lens system having a sensor for capturing an image of said object behind said light transmissive structure;
a single illuminator positioned having a known separation from said lens system;
an object distance between said lens system and said object to be imaged; and
a minimum angular separation defined an angle formed between an illumination axis and a lens system axis, wherein said minimum angular separation ensures that no specular reflections fall onto an area of an object to be imaged. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A method for imaging an area of an object positioned behind a light transmissive structure using illuminators which produce specular reflections on said light transmissive structure while avoiding specular reflections from falling onto said area of said object to be imaged, said method comprising:
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providing a first lens system;
providing a second lens system positioned a predetermined distance from said first lens system;
providing a first illuminator positioned outboard of said second lens system for operating with said first lens system to capture an image of either a left eye or a right eye;
providing a second illuminator positioned outboard of said first lens system for operating with said second lens system to capture an image of either a left eye or a right eye;
separating said first illuminator from said first lens system a distance apart from one another to ensure a minimum angular separation so that no reflections due to eyeglasses fall within an iris image area;
separating said second illuminator from said second lens system a distance apart from one another to ensure a minimum angular separation so that no reflections due to eyeglasses fall within an iris image area;
illuminating said area with said first illuminator and checking to see if said first illuminator has produced a specular reflection that obscures said area of said object;
if said first illuminator has produced a specular reflection that obscures said area of said object then illuminating said area with said second illuminator;
obtaining an image of said area while said first illuminator is on using said first imager if said first illuminator has produced a specular reflection that has not obscured said area; and
obtaining an image of said area while said second illuminator is on using said second imager if said first illuminator has produced a specular reflection that has obscured said area. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification