COPLANAR CAMERA SCANNING SYSTEM

• US 20110279672A1
• Filed: 07/22/2011
• Published: 11/17/2011
• Est. Priority Date: 03/17/2000
• Status: Active Grant

• Current Assignee: Datalogic Automation Incorporated (Datalogic S.p.A.)
• Original Assignee: Datalogic Automation Incorporated (Datalogic S.p.A.)
• Inventors: Skokowski, Richard J. JR., Chaleff, Edward I., Brobst, Thomas J.
• Granted Patent: US 9,088,683 B2
• Time in Patent Office: Days
• US Class Current: 348/143
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: H04N 1/02815 Means for illuminating the original, not specific to a particular type of pick-up head
• CPC Class Codes: H04N 1/02865 using an array of light sources or a combination of such arrays, e.g. an LED bar
• CPC Class Codes: H04N 1/03 with photodetectors arranged in a substantially linear array

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.

Claims

1. A fixed-position scanning system for scanning objects in an object scanning area on a conveyor belt, the scanning system comprising:

a linear array sensor adapted to detect light input signals;

a first lens optically connected to the linear array sensor and adapted to receive and transmit an optical image located in a field of view of the first lens to the linear array sensor;

a light source; and

a second lens positioned between the light source and the conveyor belt, wherein the second lens is adapted to provide an illumination plane from light produced by the light source,

wherein the illumination plane is coplanar with the field of view over at least a portion of a depth of field of the object scanning area.