An add-on device for an image scanner for scanning barcodes is provided. The add-on device includes a housing mounted to the standard range lens front on an image scanner, and a lens holder. The lens holder has a first position for holding a first lens, a second position being an aperture, and a third position for holding a second lens. A high-density lens is mounted in the first position. An extended range lens is mounted in the third position. The lens holder is mounted in the housing and is transverse to the optical axis of the standard range lens of the image scanner. Further, the lens holder is movable within the housing in order to alternately position the high-density lens, the aperture, and the extended range lens to be in alignment with the optical axis of the standard range lens of the image scanner.

The present disclosure provides systems and methods for acquiring images of a code at variable distances. The systems and methods utilize variable focus lenses to provide operating conditions where acquisition of images of the code at shorter distances provides a wider viewing angle and lower magnification than acquisition of images of the code at longer distance. In some cases, the distances for code image acquisition can be predefined. The predefined distances can have corresponding predefined variable focus lens settings to facilitate image acquisition.

An imaging reader has near and far imagers for imaging illuminated targets to be read over a range of working distances. A range finder determines a distance to a target. A default imager captures a minor portion of an image of the target, and rapidly determines its light intensity level. At least one of the imagers is selected based on the determined distance and/or the determined light intensity level. The exposure and/or gain of the selected imager is set to a predetermined value, and an illumination level is determined, also based on the determined light intensity level and/or the determined distance. The selected imager, which has been set with the predetermined value, captures an image of the target, which has been illuminated at the illumination light level.

The disclosed embodiments include wearable devices and methods for performing courier services. In one implementation, the device includes a depth camera for detecting object depths in a field of view, a scanner for decoding visual codes, a speaker for producing audible sounds in response to an electrical signal, memory, and a processor. The processor may execute instructions to detect a scanning event based on a first signal received from the depth camera, determine a scan region associated with the scanning event, provide a second signal to the scanner causing the scanner to decode a visual code located within the scan region, generate scan data based on a third signal received from the scanner, and provide a fourth signal to the speaker causing the speaker to emit a notification sound. The wearable device may also capture signatures, dimension objects, and disable device functions based on time and place restrictions.

A screen display ratio adjusting apparatus includes a handheld device and a display device. The handheld device includes an application module which obtains an image of a pre-stored picture being displayed on a display interface of the display device (test picture). The pre-stored picture includes a first section and a second section. The application module calculates respective lengths and widths of the first and second sections from the test picture. The application module further calculates a display size ratio between the first section and the second section, and adjusts a display size of the first section. The display device is then configured to display the first section in an adjusted size. A screen display ratio adjusting method is also provided.

Embodiments of the present disclosure include near co-axial polarized illuminator apparatuses and uses thereof. The near co-axial polarized illuminator is internally positionable in near co-axial alignment with one or more imager(s) utilized to capture a representation of a field of view illuminated by the near co-axial polarized illuminator. Embodiments include small form factor reader(s) that utilize a near co-axial polarized illuminator to improve illumination of a field of view captured via multiple imagers for detecting and/or decoding machine-readable symbologies, such as barcodes. Some embodiments include a DPM channel image sensor, a standard range channel image sensor, a near co-axial polarizer light source positioned adjacent to the DPM channel image sensor and adjacent to the standard range channel image sensor, a near co-axial polarizer aligned with the near co-axial polarizer light source, and an analyzer aligned with the DPM channel image sensor and/or the standard range channel image sensor.

An optical communication device can address these and other issues by utilizing a system and method in which an optical device emits a series of laser pulses that trace a spiral path over a coverage area. Each laser pulse containing a packet of information modulated at a relatively rate to help mitigate adverse effects from device movements, scintillation, and the like. The beam width of the laser, speed of the scan (along the spiral path), and number of laser pulses can be configured such that corresponding response pulses (e.g., retro-modulated pulses) received from an illuminated tag within the coverage may have a variety of different amplitudes, increasing the likelihood that at least one of the response pulses will have power characteristics that facilitate a proper decoding of the response pulse.

Embodiments of the present invention are directed towards barcode readers that implement multiple circuit boards for housing various electronic components. In an embodiment, the present invention is a handheld barcode reader that includes: a handle portion; a head portion positioned on a top of the handle portion; a window positioned within the head portion; a first circuit board extending at least partially through the handle portion, the first circuit board defining a first plane, the first circuit board including a decode assembly; and a second circuit board positioned behind the first plane relative to the window, the second circuit board including an imaging assembly having an imaging sensor, the imaging sensor operable to capture image data over a field of view (FOV), the FOV extending through the first plane and the window.

Systems and methods for selectively illuminating objects located within the field-of-view of an image sensor used to capture images in a machine-readable symbol reader. In an active illuminated reading mode, a light source illuminates objects as the image sensor captures images. In a self-illuminated object reading mode, used to capture images of smartphone, tablet, or other self-illuminating displays, the image sensor captures images without the light source illuminating the objects. The machine-readable symbol reader transitions between the two modes based upon distance and light-level measurements taken of the various objects that are within the field-of-view of the image sensor.

Image processing for scanning devices based on laser aimer position, wherein a first frame and a second frame of image data related to an object associated with a barcode are captured using a scanning device. A difference between first pixel data for a first grouping of pixels associated with the first frame and second pixel data for a second grouping of pixels associated with the second frame is computed. Additionally, a location of a laser aimer pattern in the first frame or the second frame is determined based on a comparison between respective differences between the first pixel data for the first grouping of pixels and the second pixel data for the second grouping of pixels, where the laser aimer pattern is created by the scanning device.