Methods and apparatus for repetitive iris recognition
First Claim
1. An apparatus for repetitively imaging an iris, the apparatus comprising:
- a housing defining a substantially planar outer surface, a first axis normal to the substantially planar outer surface, and a curved outer surface, opposite the substantially planar outer surface, defined by a curve rotated about the first axis;
an infrared sensor array, disposed within the housing, to acquire an infrared image of an iris via at least one first aperture in the substantially planar outer surface; and
at least one infrared illuminator, disposed within the housing, to illuminate the iris during acquisition of the infrared image of the iris via at least one second aperture in the substantially planar outer surface, wherein the housing has a width W, a tipping angle θ
TIP between 50 and 85 degrees, and a height H=Wk/tan θ
TIP, and wherein k is in a range of about ⅔
to about 2.5.
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Accused Products
Abstract
The methods and apparatus for repetitive iris recognition include an apparatus for repetitively imaging an iris. The apparatus comprises a housing defining a substantially planar outer surface, a first axis normal to the substantially planar outer surface, and a curved outer surface, opposite the substantially planar outer surface, defined by a curve rotated about the first axis. The apparatus further comprises an infrared sensor array, disposed within the housing, to acquire an infrared image of an iris via at least one first aperture in the substantially planar outer surface. The apparatus further comprises at least one infrared illuminator, disposed within the housing, to illuminate the iris during acquisition of the infrared image of the iris via at least one second aperture in the substantially planar outer surface.
111 Citations
12 Claims
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1. An apparatus for repetitively imaging an iris, the apparatus comprising:
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a housing defining a substantially planar outer surface, a first axis normal to the substantially planar outer surface, and a curved outer surface, opposite the substantially planar outer surface, defined by a curve rotated about the first axis; an infrared sensor array, disposed within the housing, to acquire an infrared image of an iris via at least one first aperture in the substantially planar outer surface; and at least one infrared illuminator, disposed within the housing, to illuminate the iris during acquisition of the infrared image of the iris via at least one second aperture in the substantially planar outer surface, wherein the housing has a width W, a tipping angle θ
TIP between 50 and 85 degrees, and a height H=Wk/tan θ
TIP, and wherein k is in a range of about ⅔
to about 2.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A repetitive-use iris image recognition device having a bottom surface that is primarily flat and a top surface that is primarily curved and primarily rotationally symmetric about a vertical axis through the bottom surface, the repetitive-use iris image recognition device comprising:
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an infra-red camera viewing the scene through the bottom surface; and one or more infra-red illuminators illuminating the scene through the bottom surface; wherein the top surface has an apex at a height H above the bottom surface determined by the formula θ
TIP=tan−
1 (W/2KH), where θ
TIP is between 50 and 85 degrees, W is a width of the repetitive-use iris image recognition device, and K is in the range of 0.2 to 0.75.- View Dependent Claims (11, 12)
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10. A repetitive-use iris image recognition device having a bottom surface that is primarily flat and a top surface that is primarily curved and primarily rotationally symmetric about a vertical axis through the bottom surface, the repetitive-use iris image recognition device comprising:
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an infra-red camera viewing the scene through the bottom surface; and one or more infra-red illuminators illuminating the scene through the bottom surface, wherein the top surface has an apex at a height H above the bottom surface in the range of about 0.75 inches to about 1.5 inches, and the one or more infra-red illuminators are positioned at or below a horizontal centerline of the repetitive-use iris image recognition device.
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Specification