Coplanar camera scanning system
First Claim
1. A large depth of field system located over a moving surface which carries objects to be scanned through an object scanning area, comprising:
- a linear array sensor adapted to detect light input signals;
a sensor lens optically connected to the linear array sensor, the lens being adapted to receive and transmit an optical image located in an optical field of view to the linear array sensor;
a light source comprising a housing having four side walls, at least one linear row of LEDs located at a fifth wall of the housing, and a Fresnel lens that is spaced apart from and positioned to receive a generally unobstructed light output of the LEDs located at a sixth wall of the housing, opposite the fifth wall, to produce an illumination plane that has a height that extends over a depth of field and a width that extends across the field of view so that an illumination stripe is formed on a surface of the object traveling through the field of view; and
the illumination plane and the field of view of the linear array sensor are coplanar over the depth of field in the object scanning area.
2 Assignments
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Accused Products
Abstract
A system for scanning objects having at least two linear array sensors, adapted to detect light input signals, is provided. A lens is optically connected to each of the linear array sensors, and are adapted to receive and transmit an optical image located in a respective lens field of view along a respective lens axis to the respective one of the at least two linear array sensor. A light source which generates an illumination stripe in general linear alignment with the lens axis across a depth of the field of view is provided. A cylindrical lens is positioned between the light source and an object to be scanned. The cylindrical lens adapted to collect, transmit and focus light from the light source to form the illumination stripe. This arrangement provides a wider system field of view with generally more uniform resolution.
108 Citations
9 Claims
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1. A large depth of field system located over a moving surface which carries objects to be scanned through an object scanning area, comprising:
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a linear array sensor adapted to detect light input signals; a sensor lens optically connected to the linear array sensor, the lens being adapted to receive and transmit an optical image located in an optical field of view to the linear array sensor; a light source comprising a housing having four side walls, at least one linear row of LEDs located at a fifth wall of the housing, and a Fresnel lens that is spaced apart from and positioned to receive a generally unobstructed light output of the LEDs located at a sixth wall of the housing, opposite the fifth wall, to produce an illumination plane that has a height that extends over a depth of field and a width that extends across the field of view so that an illumination stripe is formed on a surface of the object traveling through the field of view; and
the illumination plane and the field of view of the linear array sensor are coplanar over the depth of field in the object scanning area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification
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- Resources
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Current AssigneeDatalogic Automation Incorporated (Datalogic S.p.A.)
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Original AssigneeAccu-Sort Systems Incorporated (Datalogic S.p.A.)
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InventorsSkokowski, Richard J. Jr., Chaleff, Edward I., Brobst, Thomas J.
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Primary Examiner(s)Ho; Tuan V
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Assistant Examiner(s)SEGURA, CYNTHIA
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Application NumberUS11/165,602Publication NumberTime in Patent Office1,454 DaysField of Search348/376, 250/227.26, 234/462.01, 358/474US Class Current348/376CPC Class CodesG06K 7/10722 Photodetector array or CCD ...G06K 7/10732 Light sourcesH04N 1/02815 Means for illuminating the ...H04N 1/02865 using an array of light sou...H04N 1/03 with photodetectors arrange...
