IMAGING READER WITH ASYMMETRICAL MAGNIFICATION
First Claim
1. A reader for electro-optically reading indicia, comprising:
- a housing;
a solid-state imager within the housing, for capturing light along an optical axis from the indicia over a field of view;
a controller for controlling the imager to produce an electrical signal indicative of the indicia being read, and for processing the electrical signal to read the indicia; and
an optical assembly including non-rotationally symmetrical optics for optically modifying and asymmetrically magnifying an image of the indicia and the field of view of the imager along mutually orthogonal directions generally perpendicular to the optical axis, and for increasing resolution of the imager along one of said directions.
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Accused Products
Abstract
A solid-state imager is mounted in a reader, such as a bi-optical, dual window, point-of-transaction workstation, for capturing light along an optical axis over a field of view from coded indicia. An optical assembly including non-rotationally symmetrical optics is operative for optically modifying and asymmetrically magnifying an image of the indicia and the field of view of the imager along mutually orthogonal directions generally perpendicular to the optical axis, and for increasing resolution of the imager along one of the directions. Preferably, the non-rotationally symmetrical optics includes a cylindrical lens having an aspherical profile along the one direction, and a planar profile along the other of the directions.
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Citations
20 Claims
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1. A reader for electro-optically reading indicia, comprising:
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a housing; a solid-state imager within the housing, for capturing light along an optical axis from the indicia over a field of view; a controller for controlling the imager to produce an electrical signal indicative of the indicia being read, and for processing the electrical signal to read the indicia; and an optical assembly including non-rotationally symmetrical optics for optically modifying and asymmetrically magnifying an image of the indicia and the field of view of the imager along mutually orthogonal directions generally perpendicular to the optical axis, and for increasing resolution of the imager along one of said directions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An arrangement for use in electro-optically reading indicia, comprising:
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a solid-state imager for capturing light along an optical axis from the indicia over a field of view; a controller for controlling the imager to produce an electrical signal indicative of the indicia being read, and for processing the electrical signal to read the indicia; and an optical assembly including non-rotationally symmetrical optics for optically modifying and asymmetrically magnifying an image of the indicia and the field of view of the imager along mutually orthogonal directions generally perpendicular to the optical axis, and for increasing resolution of the imager along one of said directions. - View Dependent Claims (12)
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13. A method of electro-optically reading indicia, comprising the steps of:
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capturing light from the indicia with a solid-state imager along an optical axis over a field of view; controlling the imager to produce an electrical signal indicative of the indicia being read, and processing the electrical signal to read the indicia; and optically modifying and asymmetrically magnifying an image of the indicia and the field of view of the imager along mutually orthogonal directions generally perpendicular to the optical axis, and increasing resolution of the imager along one of said directions, with non-rotationally symmetrical optics. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification