Omni-directional optical code reader using scheimpflug optics
First Claim
Patent Images
1. A method of optical reading comprising the steps of:
- focusing, along an optical path, a two-dimensional image of an object being read;
projecting the two dimensional image toward a collection system comprised of one or more two-dimensional sensor arrays, each sensor array being arranged at a tilt angle α
with respect to the optical path according to the Scheimpflug principle;
detecting the two dimensional image at differing rotational angles relative to the optical path while maintaining the tilt angle α
of the sensor array with respect to the optical path.
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Abstract
An optical code reader for reading optical codes in any orientation with a preferred depth of field (DOF), the optical code reader including imaging sensor arrays arranged at angles to one another and tilted in accordance with the Scheimpflug principle to allow for omni-directional reading and a preferred DOF. In addition, an optical code reader may also include an optical device to rotate an image as it is projected upon a stationary tilted image sensor array. Still further, an optical code reader may include a rotating imaging sensor array tilted in accordance with the Scheimpflug principle to allow for omni-directional reading with a preferred DOF.
81 Citations
23 Claims
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1. A method of optical reading comprising the steps of:
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focusing, along an optical path, a two-dimensional image of an object being read;
projecting the two dimensional image toward a collection system comprised of one or more two-dimensional sensor arrays, each sensor array being arranged at a tilt angle α
with respect to the optical path according to the Scheimpflug principle;
detecting the two dimensional image at differing rotational angles relative to the optical path while maintaining the tilt angle α
of the sensor array with respect to the optical path. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An optical reader comprising:
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a lens system for focusing along an optical path an image of an object being read;
a plurality of image sensor arrays disposed in the optical path for detecting a signal representative of light reflected from the object through said lens system, wherein each of said image sensor arrays is disposed in a separate plane, wherein each plane is arranged at approximately a same tilt angle α
with respect to the optical path according to the Scheimpflug principle, wherein each plane of said image sensor arrays is oriented at a different rotational angle to the optical path in relation to one another. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An optical reader comprising:
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means for focusing, along an optical path, an image of an object being read;
a plurality of image sensor arrays arranged about the optical path, each of said image sensor arrays being disposed in a separate plane, wherein each plane is arranged at approximately a same tilt angle α
with respect to the optical path according to the Scheimpf lug principle, wherein each plane of said image sensor arrays is oriented at a different rotational angle to the optical path an relation to one another. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method of optical reading comprising the steps of:
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focusing, along an optical path, an image of an object being read;
arranging a plurality of image sensor arrays about the optical path with each of said image sensor arrays being disposed in a separate plane at approximately a same tilt angle α
with respect to the optical path according to the Scheimpflug principle, wherein each plane of the image sensor arrays is oriented at a different rotational angle to the optical path in relation to one another;
detecting, at each of the image sensor arrays, a signal representative of light reflected from the object.
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22. A method of optical reading comprising the steps of:
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focusing via a first lens system an image of an object being read onto a first two-dimensional image sensor array, wherein the first image sensor array is arranged at a tilt angle α
with respect to the first lens system according to the Scheimpflug principle;
focusing via a second lens system an image of the object being read onto a second two-dimensional image sensor array, wherein the second image sensor array is arranged at a tilt angle α
with respect to the second lens system according to the Scheimpflug principle, wherein each of the image sensor arrays is disposed in a separate plane; and
detecting, at each of the image sensor arrays, a signal representative of light reflected from the object.
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23. An optical reader comprising:
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a plurality of at least two sensor arrays with lens combinations, comprised of;
a first lens system;
a first two-dimensional image sensor array for detecting a signal representative of light reflected from an optical code through said first lens system, wherein the first image sensor array is disposed approximately at a tilt angle α
with respect to the first lens system;
a second two-dimensional image sensor array for detecting a signal representative of light reflected from an optical code through said second lens system, wherein the second image sensor array is disposed approximately at a tilt angle α
with respect to the second lens system according to the Scheimpflug principle,wherein each of the image sensor arrays is disposed in a separate plane.
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Specification