| Patent application number | Description | Published |
|---|
| 20080239140 | Adaptive aperture for an imaging scanner - An apparatus and method is provided for focusing an image of a target object. The apparatus comprises imaging circuitry for analyzing an image reflected from a target object that is projected onto an imaging sensor coupled to the imaging circuitry. A fixed imaging lens having an optical axis in alignment with the imaging sensor focuses the reflected image onto the imaging sensor. One of a plurality of apertures located within a selectable aperture of varying sizes is selected for optically enhancing the fixed imaging lens. An actuator is coupled to the selectable aperture for selectively selecting the one of the plurality of apertures in a direction transverse to optical axis for optically enhancing the fixed imaging lens. | 10-02-2008 |
| 20080239509 | Compact imaging lens assembly for an imaging-based bar code reader - An imaging lens assembly ( | 10-02-2008 |
| 20080265035 | DUAL IMAGING LENS SYSTEM FOR BAR CODE READER - An imaging system for an imaging-based bar code reader for capturing an image of a target bar code. In one exemplary embodiment, the imaging system includes: a sensor array including an array of photosensitive elements for converting, light impinging on the array of photosensitive elements into electrical signals based on light intensity; an imaging lens system for focusing light from a field of view onto the sensor array, the imaging lens system including a first lens assembly and a second lens assembly, the first lens assembly defining a first field of view and the second lens assembly defining a second field of view, the first and second fields of view being different; and a control for selectively choosing between the first and second fields of view for imaging the target bar code. | 10-30-2008 |
| 20080290169 | COMPACT AUTOFOCUS BAR CODE READER WITH MOVING MIRROR - The disclosed bar code reader includes an auto-focusing component for rapidly producing in focus images. An imaging system makes use of an aiming pattern that impinges upon the coded indicia of a target. The imaging system includes a light monitoring pixel array and a focusing lens that is fixed with respect to the pixel array for transmitting an image of the target object onto the pixel array. The imaging system also includes a movable mirror mounted for movement along a path of travel to reflect light passing through the focusing lens onto the pixel array. A drive motor moves the mirror relative the lens to adjust a focus of an image of the object formed at the pixel array. An automatic focusing component of the imaging system analyzes the aiming pattern reflected from the target object and projected onto the pixel array by the lens. The automatic focusing component issues commands to the drive motor causing the mirror to move along its path of travel to a suitable position for properly focusing the target object onto the pixel array. | 11-27-2008 |
| 20080290171 | ILLUMINATION APPARATUS FOR AN IMAGING-BASED BAR CODE READER - An illumination apparatus ( | 11-27-2008 |
| 20080296385 | VARIABLE FOCUS IMAGING LENS ASSEMBLY FOR AN IMAGING-BASED BAR CODE READER - A variable focus imaging lens assembly ( | 12-04-2008 |
| 20090001169 | BAR CODE READER WITH IMPROVED LENS FOR IMAGING WITH BALANCED ASTIGMATISM - An exemplary imaging based barcode reader has an imaging system that includes a photosensitive array, a focusing lens fixed with respect to the light detecting array which creates an image of a target object on the light detecting array; and an aperture stop fixed in relation to the focusing lens having an opening that allows light from the target object to impinge upon the lens for focusing onto the light detecting array. The focusing lens has a surface facing the aperture stop that is toroidal and in one exemplary embodiment approximates a cylinder that balances or optimizes. Astigmatism of the lens in the imaging plane located in the close proximity to the photosensitive array. | 01-01-2009 |
| 20090057413 | Selectable Aiming Pattern for an Imaging-Based Bar Code Reader - An aiming pattern assembly ( | 03-05-2009 |
| 20090084851 | Imaging reader for and method of improving visibility of aiming pattern - An aiming light assembly supported by a mobile imaging reader projects an aiming light pattern on a symbol. A controller modulates the aiming light pattern to render the aiming light pattern more visibly discernible to an operator, especially in a brightly lit ambient environment, to enable the operator to position the aiming light pattern on the symbol prior to reading. | 04-02-2009 |
| 20090084852 | Aiming pattern indicative of optimum working distance in imaging reader and method - An aiming light assembly supported by a mobile imaging reader projects an aiming light pattern on a symbol prior to reading. The aiming light pattern visually indicates to an operator an optimum distance in a working range at which the symbol is best readable within a field of view. | 04-02-2009 |
| 20090084856 | Imaging reader with asymmetrical magnification - 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 diverse targets useful for customer identification, customer payment validation, operator surveillance, and coded indicia. An optical converter is located within the housing, for optically modifying and asymmetrically magnifying the field of view along mutually orthogonal directions generally perpendicular to the optical axis, and for increasing resolution of the imager along one of these directions. | 04-02-2009 |
| 20090108068 | Parallax adjustment in imaging readers for electro-optically reading indicia - In an imaging reader for reading a target located in a range of working distances from the reader, a solid-state imager captures light from the target in the range of working distances over a field of view, an aiming system visually illuminates the symbol with an aiming light pattern, and a steering system steers the aiming light pattern and/or the field of view to be substantially aligned throughout the range of working distances to aid an operator in aiming the imager at the symbol prior to reading. | 04-30-2009 |
| 20090108076 | Electro-optical reader switchable between handheld and hands-free modes of operation by non-magnetic, immobile switch - An immobile, non-magnetic mode sensor, preferably an optical sensor, is entirely supported by a housing of a reader for electro-optically reading indicia in a handheld mode, and in a hands-free mode, of operation. The mode sensor is operative for sensing the mode of operation, for example, by detecting whether the housing has been grasped by an operator, or by detecting whether the housing has been removed from a support surface. The mode sensor is actuatable between handheld and hands-free states, which respectively correspond to the handheld and hands-free modes of operation. A controller is operative for selecting the mode of operation, which is sensed by the mode sensor, in which the indicia is to be read. | 04-30-2009 |
| 20090166543 | Imaging reader with enhanced light throughput - A solid-state imager detects return light from a target, and generates an electrical signal corresponding to the return light. A controller processes the electrical signal into data indicative of the target during an imaging mode of operation. An imaging lens assembly captures, optically modifies and directs the return light over a field of view along an optical path onto the imager. The imaging lens assembly includes a variable liquid lens controlled by the controller for optically modifying the return light. The liquid lens has an entrance area and is located in close proximity to an aperture stop A plurality of solid lenses magnifies the aperture stop and has an entrance pupil larger in size than the aperture stop and the entrance area to increase throughput of the return light to the imager. | 07-02-2009 |
| 20090168010 | Adaptive focusing using liquid crystal lens in electro-optical readers - Working range and beam cross-section are adjusted in an electro-optical reader for reading indicia by applying voltages to electrodes in one or more liquid crystal lenses in which the index of refraction is changed. | 07-02-2009 |
| 20090272807 | IMAGING SYSTEM HAVING ANAMORPHIC MANGNIFCATION - A method and imaging system ( | 11-05-2009 |
| 20090302116 | SEMI-ZOOM IMAGING OPTICAL SYSTEM - An apparatus includes a first lens, a liquid lens, imaging sensor arrays, an aperture stop, and a barcode decoding system. The first lens has a fixed optical power. The liquid lens has a variable optical power. The imaging sensor arrays are operable to receive light passing through both the first lens and the liquid lens. The liquid lens is positioned between the aperture stop and the imaging sensor arrays. The barcode decoding system receives signals from the imaging sensor arrays. | 12-10-2009 |
| 20100051696 | ILLUMINATION SYSTEM FOR A BAR CODE READER - A method and apparatus for illuminating a target object such as a bar code having areas of differing light intensity on the target. A bar code reader has a light source that is selectively activated, a screen having a slit aperture for creating a narrow light beam, a reflecting mirror for reflecting light transmitted through the slit aperture and a lens for shaping light reflected by the mirror to form an elongated target/illumination pattern. | 03-04-2010 |
| 20100155481 | DUAL LASER AIMING PATTERNS FOR AN IMAGING-BASED BAR CODE READER - An aiming pattern assembly for an imaging-based bar code reader including: a laser assembly laterally offset from an imaging lens assembly optical axis, the laser assembly including a first laser light source and a second laser light source; and a focusing lens defining an optical axis and positioned proximate to the laser assembly, the focusing lens focusing the laser light generated by the first laser light source to generate a first aiming pattern traversing along a first beam path and focusing the laser light generated by the second laser light source to generate a second aiming pattern traversing along a second beam path, the first laser light source being aligned with the focusing lens optical axis and the second laser light source being laterally offset from the focusing lens optical axis resulting in the second beam path crossing the imaging lens assembly optical axis in a near working range. | 06-24-2010 |
| 20100155485 | TWO POSITION ZOOM LENS ASSEMBLY FOR AN IMAGING-BASED BAR CODE READER - An imaging-based bar code reader including: an imaging system for imaging a target bar code within a field of view of the imaging system and projecting light from the field of view onto a sensor array, the imaging system generating image frames of the field of view of the imaging system; the imaging systems including an imaging lens assembly having a plurality of lens and a selection drive mechanism to select between a first optical zoom position defining a first focal length and a first field of view for imaging a target bar code at a close range and a second optical zoom position defining a second focal length and a second field of view for imaging a target bar code at a far range, the second focal length being greater than the first focal length. | 06-24-2010 |
| 20100155487 | Illumination Apparatus for An Imaging-Based Bar Code System - An imaging-based barcode system including a scanning arrangement and an illumination apparatus is shown. The scanning arrangement includes a sensor assembly for capturing an image from a target object, the sensor assembly having a field-of-view focused by an optical arrangement onto a sensor array located within the sensor assembly. The illumination system includes a first illumination assembly and a second illumination assembly, each of the first and second assemblies including an illumination source directing illumination through a light pipe and a focusing lens to generate an illumination pattern directed towards a target object, wherein the light pipe includes an input surface and an output surface, the light pipe is configured to change the light intensity distribution at its output surface. | 06-24-2010 |
| 20110049242 | METHOD AND APPARATUS FOR ESTIMATING EXPOSURE TIME FOR IMAGING-BASED BARCODE SCANNERS - A method and apparatus for estimating an optimized exposure time for an imaging-based barcode scanner. The method includes (1) determining a SNR decodability function that enables a decodability value be determined from a signal-to-noise ratio; (2) determining a blur decodability function that enables a decodability value be determined from a blur value; (3) measuring a blur and a signal-to-noise ratio for an image captured with a first exposure time; and (4) determining an optimized exposure time based on the measured blur, the measured signal-to-noise ratio, and a combined decodability function that depends upon both the SNR decodability function and the blur decodability function. | 03-03-2011 |
| 20110073652 | METHOD AND APPARATUS FOR INTELLIGENTLY CONTROLLING ILLUMINATION PATTERNS PROJECTED FROM BARCODE READERS - A method and apparatus for intelligently controlling illumination patterns projected from barcode readers. The method includes (1) detecting a location of an object of interest with a plurality of object sensors each having a corresponding object field of view; and (2) selecting at least one illumination light source to project one or more illumination patterns in one or more predetermined directions at least based upon the location of the object determined with the plurality of object sensors. | 03-31-2011 |
