System for obtaining print and other hand characteristic information using a non-planar prism
First Claim
1. A system for capturing biometric data, comprising:
- a non-planar prism comprising a substantially conical portion, a top portion, and a planar portion, the non-planar prism configured to be illuminated by a light source; and
a scanning optical system configured to capture image data of a print area of a hand of a person interacting with the substantially conical portion of the non-planar prism, such that the top portion is located between a thumb of the hand and an index finger of the hand, the thumb of the hand interacts with a first side of the substantially conical portion, and the fingers of the hand interact with a second, opposite side of the substantially conical portion during the capture of the image data;
wherein the image data represents substantially all of the print area of the hand of the person, while the hand is stationary on the substantially conical portion of the non-planar prism.
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Accused Products
Abstract
A system and method include a non-planar prism and a scanning imaging system configured to locate and/or scan all or part of a hand print for one or more hands positioned on a curved portion of the non-planar prism. The curved portion can be symmetrical about an axis of symmetry of the non-planar prism. Typically, a print pattern on a palm pocket, a writer'"'"'s palm, or the like, is hard to capture on a flat surface. In contrast, the non-planar prism of the present invention provides a form so that a print pattern on the palm pocket, writer'"'"'s palm, or the like, can be captured. Print patterns or different parts of a hand (e.g., fingertips and a writer'"'"'s palm) are also more easily captured using the non-planar prism. Hand and/or finger characteristic data can also be captured, for example hand geometry (e.g., finger lengths and spacing between fingers). The scanning imaging system can be stationary or it can be rotated along an arcuate scan path about a centerline axis of the optical element. During the rotation, an image of the full hand print (including thenar, hypothenar, inter digital, palm heel, palm pocket, and fingertips) and/or full palm and finger prints can be captured. The optical element can also include a calibration area (e.g., target) that can be used to calibrate the measuring device during each scan and/or be captured with the image for future quality control of the captured image.
131 Citations
38 Claims
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1. A system for capturing biometric data, comprising:
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a non-planar prism comprising a substantially conical portion, a top portion, and a planar portion, the non-planar prism configured to be illuminated by a light source; and a scanning optical system configured to capture image data of a print area of a hand of a person interacting with the substantially conical portion of the non-planar prism, such that the top portion is located between a thumb of the hand and an index finger of the hand, the thumb of the hand interacts with a first side of the substantially conical portion, and the fingers of the hand interact with a second, opposite side of the substantially conical portion during the capture of the image data; wherein the image data represents substantially all of the print area of the hand of the person, while the hand is stationary on the substantially conical portion of the non-planar prism. - 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, 31, 33, 35, 36, 37, 38)
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27. A system for capturing biometric data comprising:
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a non-planar prism configured to totally internally reflect light from a substantially conical portion of the non-planar prism, such that the totally internally reflected light exits a planar portion of the non-planar prism; and an image capturing system that receives the totally internally reflected light and generates image data therefrom of a print area of a hand of a person interacting with opposite sides of the substantially conical portion of the non-planar prism, wherein the hand is configured to be positioned using a top portion of the non-planar prism, wherein the image data represents substantially all of the print area of the hand of the person, while the hand is stationary on the substantially conical portion of the non-planar prism. - View Dependent Claims (28, 29, 30, 32, 34)
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Specification