Patent application number | Description | Published |
20080203164 | Photodiode with improved performance in ambient light - An arrangement for improving performance of a sensor operative for collecting light from a target to generate a data signal in a presence of ambient light, includes a sample and hold circuit for operating the sensor during a sampling time period in which the sensor only collects the ambient light to generate an ambient signal, and during a holding time period in which the sensor collects both the ambient light and the light from the target to generate a composite signal comprised of the ambient signal and the data signal; and a subtracting circuit operative for subtracting the ambient signal from the composite signal to produce the data signal as an output. | 08-28-2008 |
20080204541 | Aperture stop in an image projection arrangement for preserving color fidelity over an image - A lightweight, compact image projection module has a laser assembly for emitting a plurality of laser beams of different wavelengths, an optical assembly for focusing and nearly collinearly arranging the laser beams to form a composite beam, a scanner for sweeping the composite beam in a pattern of scan lines, each scan line having a number of pixels, and a controller for causing selected pixels to be illuminated, and rendered visible, by the composite beam to produce the image. An aperture stop located between the laser assembly and the scanner, limits a cross-sectional dimension of at least one of the laser beams to below a prescribed level to preserve color fidelity over the image. | 08-28-2008 |
20090109534 | Multi-Segmented Aiming Diffractive Optical Elements - A system having a light source generating a light beam, a collimating lens collimating the light beam into a collimated light beam and a pattern generating element comprising a diffractive optical element portion and a refractive optical element portion, the pattern generating element creating a target pattern from the collimated light beam incident on the pattern generating element. | 04-30-2009 |
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 |
20090272808 | Imaging module with optical elements of one-piece construction - An imaging module for imaging, and a reader for and a method of electro-optically reading, a target, include an aiming assembly having an aiming laser for generating an aiming laser beam, an aiming element for collimating the laser beam, and a pattern-generating element for optically modifying the collimated laser beam to generate a visible aiming light pattern on the target, and an illuminating assembly having an illuminating light source for generating illumination light, and an illuminating element for uniformly illuminating the target with the illumination light. A solid-state imager has an array of image sensors for capturing return illumination light from the target. The pattern-generating element is molded of a one-piece construction with at least one of the aiming and illuminating elements. | 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 |
20100123007 | Electro-optical lens mounting assembly and method in electro-optical readers - A lensholder holds at least one fixed optical lens and a variable focusing element in a spaced relation along an optical path through which light passes in an electro-optical reader. The variable focusing element has a pair of electrodes across which a voltage is applied to optically modify the light passing through the fixed optical lens and the variable focusing element. The lensholder directly electrically conductively contacts the electrodes and establishes an electrically conductive path between each electrode and an exterior of the lensholder. | 05-20-2010 |
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 |
20110147459 | AIMING SIGHT FOR A BARCODE READER - An apparatus, system, and method for aiming and reading a target object. The apparatus includes a barcode reader for reading the target object. The apparatus also includes an aiming sight coupled to the barcode reader. The aiming sight is used for aiming the target object and thereby directing the barcode reader to read the target object. The aiming sight can either be used independently or can be used along with an aiming pattern generator present in the barcode reader, in order to read the target object. | 06-23-2011 |
20110164225 | Arrangement for and method of projecting an image with linear scan lines - A lightweight, compact image projection module, especially for mounting in a housing having a light-transmissive window, is operative for sweeping a composite laser beam as a pattern of linear scan lines on a planar projection surface and for causing selected pixels arranged along each linear scan line to be illuminated to produce an image of high quality and in color. | 07-07-2011 |
20120074226 | AIMING SIGHT FOR A BARCODE READER - An apparatus, system, and method for aiming and reading a target object. The apparatus includes a barcode reader for reading the target object. The apparatus also includes an aiming sight coupled to the barcode reader. The aiming sight is used for aiming the target object and thereby directing the barcode reader to read the target object. The aiming sight can either be used independently or can be used along with an aiming pattern generator present in the barcode reader, in order to read the target object. | 03-29-2012 |
20120126015 | LIGHT SEAL GASKET FOR USING IN IMAGING-BASED BARCODE READER - The light seal gasket for using in a barcode reading arrangement includes (1) a skirt region configured to surround the solid-state imager on the circuit board and having a bottom surface for making a light seal with the circuit board, (2) a baffle tube configured for aligning with an opening on the chassis and having a top surface for making a light seal with the chassis, and (3) a diaphragm region configured to be bendable when the chassis and the circuit board are pressed towards each other with the light seal gasket sandwiched in-between. | 05-24-2012 |
20130026233 | IMAGER EXPOSURE, ILLUMINATION AND SATURATION CONTROLS IN A POINT-OF-TRANSACTION WORKSTATION - An illumination time of an illumination system and/or an exposure setting of an imaging system are adjusted by a proximity system operative for detecting a product entering a field of view in a bi-optical, dual window, point-of-transaction workstation. The proximity system includes an infrared emitter for emitting infrared light to the product, and an infrared sensor for sensing return infrared light from the product. Multiple predefined thresholds are stored for the sensed return infrared light, and a predefined illumination time and/or exposure setting are stored and assigned to each predefined threshold. Adjustment of the illumination time and/or of the exposure setting is performed by comparing the sensed return infrared light from the product in real time operation with the stored predefined thresholds. | 01-31-2013 |
20130062412 | APPARATUS FOR AND METHOD OF READING PRINTED AND ELECTRONIC CODES - An apparatus for, and method of, imaging printed and electronic codes associated with transactions or objects to be processed, support a window on a housing, illuminate the codes through the window with illumination light from an energizable illumination system, capture return illumination light from the illuminated codes through the window with an array of light sensors looking at a field of view of a solid-state, exposable imager, and process the captured return illumination light. A printed code is read by exposing the imager for a first exposure time and by also energizing the illumination system during the first exposure time. An electronic code is read by exposing the imager for a second exposure time that is longer than the first exposure time and by also deenergizing the illumination system during the second exposure time. | 03-14-2013 |
20130141584 | APPARATUS FOR AND METHOD OF TRIGGERING ELECTRO-OPTICAL READING ONLY WHEN A TARGET TO BE READ IS IN A SELECTED ZONE IN A POINT-OF-TRANSACTION WORKSTATION - Products associated with targets to be read by image capture are processed in a workstation having a window, a solid-state imager looking at a field of view extending through the window to a target to be imaged, and an illumination system for illuminating the field of view. A proximity system detects a product associated with the target in a selected zone outside the window. The proximity system has an infrared (IR) emitter for emitting IR light into an IR emission field, and an IR sensor for sensing return IR light within an IR detection field that intersects the IR emission field in the selected zone. A controller energizes the illumination system in response to the detection of the product in the selected zone, and processes return illumination light captured in the field of view by the imager. | 06-06-2013 |
20140183263 | METHOD OF CONTROLLING ILLUMINATION PULSES TO INCREASE DYNAMIC RANGE IN BIOPTIC IMAGER BARCODE SCANNER - A method for controlling a workstation includes the following: (1) energizing a first illuminator to illuminate a first subfield of view with a first illumination pulse and subsequently energizing the first illuminator to illuminate the first subfield of view with a second illumination pulse; (2) exposing the array of photosensitive elements in the imaging sensor for a first sensor-exposure time and subsequently exposing the array of photosensitive elements in the imaging sensor for a second sensor-exposure time; and (3) processing an image captured by the imaging sensor to decode a barcode in the image. The first illumination pulse overlaps with the first sensor-exposure time for a first overlapped-pulse-duration, and the second illumination pulse overlaps with the second sensor-exposure time for a second overlapped-pulse-duration. The first overlapped-pulse-duration is different from the second overlapped-pulse-duration. | 07-03-2014 |