An optical information reader includes an imaging lens and a lens retainer retaining the imaging lens and assembled, in this state, into the holder. The lens retainer includes a flange bottom surface and end faces as a reference surface that is parallel to an optical axis of the imaging lens. The holder includes a top surface and edge faces as a guide surface. The guide surface is brought into surface contact with the flange bottom surface and the end faces when the lens retainer is assembled into the holder, and is brought into slidable contact with the flange bottom surface and the end faces when the lens retainer is moved along the optical axis. Thus, influence of one-sided blur is minimized in terms of variation in resolution which is measured when obtaining an optimal focus position by changing relative positions of the area sensor and the imaging lens.

The system and process described herein will utilize an application configured in an image capturing system such as a handheld terminal to detect and mark a plurality of barcodes in the field of view of the terminal and show the details to the operator. The application will guide the operator through text and/or voice to configure the terminal to read the intended barcode labels. For reading multiple barcodes on an object, the application will provide various barcode sequencing configurations support. The application may suggest sequencing criteria based on past configuration options.

This invention provides a vision system that is arranged to compensate for optical drift that can occur in certain variable lens assemblies, including, but not limited to, liquid lens arrangements. The system includes an image sensor operatively connected to a vision system processor, and a variable lens assembly that is controlled (e.g. by the vision processor or another range-determining device) to vary a focal distance thereof. A positive lens assembly is configured to weaken an effect of the variable lens assembly over a predetermined operational range of the object from the positive lens assembly. The variable lens assembly is located adjacent to a front or rear focal point of the positive lens. The variable lens assembly illustratively comprises a liquid lens assembly that can be inherently variable over approximately 20 diopter. In an embodiment, the lens barrel has a C-mount lens base.

A method for tracking procedures performed on personal protection equipment (PPE) and actions of individuals includes the following steps. An article of PPE configured with a smart tag is provided to an individual prior to performance of a task. After the individual performs the task, the article of PPE is processed. Information is retrieved from the smart tag during at least one of: before, during and after processing the article of PPE. After the performance of the task, the individual's data is read and the individual enters into a designated area.

A barcode reader is provided. The barcode reader comprises an imaging assembly having a field of view (FOV) extending along one or more horizontal planes and a housing of the imaging assembly, the housing being a cuboid shape having six sides. The FOV of the imaging assembly passes through an opening in a first side of the housing with a width that is 1.5 inches or greater. The first side of the housing has a width that is greater than or equal to 2.5 inches and less than or equal to 3.5 inches, and has a height that is greater than or equal to 2.0 inches and less than or equal to 3.5 inches. The housing is substantially stable when at least a portion of a second side of the housing, substantially parallel to at least one of the one or more horizontal planes, is placed on a flat surface.

A reader contains a housing with a window having a peripheral rim. The housing has a device for reading coded information which generates a field projecting through the window towards the outside of the housing, and has a device for visually indicating the result to a user. The visual indication device generates an indication appearing substantially at least on the window, on a portion of the peripheral rim of the window, or on a portion of the housing adjoining laterally the peripheral rim of the window. The housing portion is at least on the left side, right side, or below the window. Additionally, a camera based checkout security system includes at least a checkout security camera and a fixed position reader of coded information. The checkout security camera generates a camera field of view directed towards the window of the fixed position reader of coded information.

Methods, systems, and devices for constructing an assembly are disclosed. A construction element with a machine-readable code thereon is provided. A robotic assembler is provided. The robotic assembler includes a code reader, a device for manipulating the construction element, and a controller that receives input from the code reader and provides instructions to the device. The machine-readable code is read on the construction element with the code reader. Instructions are provided to the device derived from the machine-readable code. The construction element is manipulated by the device based on the instructions.

According to one embodiment, a measuring apparatus includes a weighing scale, an imaging unit, an identification unit, and an output unit. The weighing scale is configured to measure a weight of merchandise placed in a space for measurement. The imaging unit is configured to image the space for measurement. The identification unit is configured to identify the merchandise placed in the space for measurement, based on a feature of the merchandise shown in an image captured by the imaging unit. The output unit is configured to output predetermined data through which merchandise placed in the space for measurement and a sales price of the merchandise can be specified respectively, based on the weight measured by the weighing scale and an identification result obtained by the identification unit.

A hand-held barcode reader has a decoding module that analyzes barcodes on a surface. The decoding module determines a displacement based on a current position of the hand-held barcode reader and a desired new position of the hand-held barcode reader with respect to a barcode on the surface. An LED of the hand-held barcode reader produces a first-colored light-spot at a position on the surface to direct a desired movement of the hand-held barcode reader to move from the current position to the desired new position.

Provided is an optical information reading device that can reduce an installation load on a user, and can accurately read a code provided to each of various workpieces. A polarized illumination light source includes light emitters that irradiate the workpiece with illumination light through a polarization filter. A non-polarized illumination light source includes light emitters that irradiate the workpiece with illumination light without through a polarization filter. An imaging element is provided with a polarization filter having a polarization direction different from a polarization direction of the polarization filter of the light emitters. Either of the polarized illumination light source and the non-polarized illumination light source is used in accordance with the workpiece.