Abstract: An optical information reading apparatus includes: a light source; an imaging element configured to repeat a first exposure and a second exposure; and a control part configured to control the light source such that a gravity center of a light quantity of exposure illumination at a time of the first exposure and a gravity center of a light quantity of dummy illumination before and after the second exposure or before the second exposure are at an even time interval.

Abstract: A selection apparatus capable of efficiently selecting an optimum setting condition for filtering is provided. The selection apparatus is an apparatus that selects a setting condition for filtering to be performed on a reading target. The selection apparatus includes: a determiner that determines whether the reading target is readable with each of a plurality of combinations selected from among combinations of all setting conditions for at least two types of filtering; and a selector that selects a setting condition for the filtering based on a result of the determination by the determiner.

Abstract: An imaging device comprises an imaging sensor and a pulsed LED for illuminating an imaging object of the imaging sensor, performs respective imagings according to respective imaging conditions each including an exposure time te of the imaging sensor and a lighting time tr of the pulsed LED, stores respective combinations of brightness index values D1 of respective images obtained by the respective imagings and the imaging conditions of the respective images, obtains estimates of exposure contribution degree k_off indicating degree of influence of variation of the exposure time te on brightness index value and a lighting contribution degree k_on indicating degree of influence of variation of the lighting time tr on brightness index value, based on the stored combinations of the brightness index values D1 and the imaging conditions, and determines an imaging condition to be used in the next imaging based on the estimates of k_on and k_off.

Abstract: A two-dimensional code includes: a first code symbol coding first information being valid information according to a first standard; a terminator pattern indicating an end of the valid information according to the first standard; and a second code symbol arranged after the terminator pattern in a region in which the valid information can be arranged according to the first standard and coding second information being valid information according to a second standard different from the first standard. The first information may be output data, and the second information may be non-output data.

Abstract: An optical code reading process and a reading stability determining process are performed while suppressing an increase in the cost of a transfer system and avoiding a decrease in work efficiency. CCD performs imaging. Processor reads a one-dimensional code contained in image data taken by CCD, and outputs a signal when a reading process in which the number of reading successes related to the one-dimensional code reaches a determination reference value is completed. In addition, processor determines reading stability during a period from the first reading success to completion of the reading process and outputs predictive maintenance information (PMI) representing a determination result of reading stability.

Abstract: A two-dimensional code includes: a first code symbol coding first information being a first valid information according to a first standard; a terminator pattern indicating an end of the valid information according to the first standard; and a second code symbol arranged after the terminator pattern in a region in which valid information can be arranged according to the first standard, and coding, according to a second standard different from the first standard, verification data encrypted using a private key, the verification data being for verifying correctness of the first valid information. The verification data may be signature data included in non-output data.

Abstract: A two-dimensional code includes: a first code symbol coding first information being valid information according to a first standard; a terminator pattern indicating an end of the valid information according to the first standard; and a second code symbol arranged after the terminator pattern in a region in which the valid information can be arranged according to the first standard and coding second information being valid information according to a second standard different from the first standard. The first information may be output data, and the second information may be non-output data.

Abstract: An optical code reading process and a reading stability determining process are performed while suppressing an increase in the cost of a transfer system and avoiding a decrease in work efficiency. CMOS performs imaging. Processor reads an optical code contained in image data taken by CMOS and outputs a signal upon success of reading of the optical code. Further, processor calculates a first contrast at the time of teaching and a second contrast at the time of reading success, and determines reading stability based on a decrease rate of the second contrast with respect to the first contrast.

Abstract: Provided is a dimension measuring apparatus which measures dimensions of a measurement target object without the need of complicated operations by a user. According to dimension measuring apparatus (100), laser (15) radiates laser beams to form at least two feature points on a measurement target object. Decoder (20) measures a distance from the measurement target object by using reflection light of at least two laser beams reflected on the measurement target object. Imaging sensor (10A) captures an image of the measurement target object to which at least the two laser beams are radiated. Dimension measurement section (30) measures a length of the measurement target object on a line connecting the two feature points on the basis of the distance from the measurement target object, a position of the measurement target object in the image, and positions of the two feature points in the image.

Abstract: A collimator lens unit in which an aperture limit stop formation member and a collimator lens are integrally disposed in a cylindrical member is inserted in a lens-barrel hole of the module casing so as to be reciprocatable in an optical axis direction, and a light-emitting unit is fixed in the lens-barrel hole, with an optical axis of a light source aligned with an optical axis of the collimator lens. A long hole through which an adjust pin is penetrated so as to be reciprocatable in the optical axis direction is formed in a peripheral sidewall of the lens-barrel hole, and a fitting portion in which the adjust pin is fit is formed in an outer peripheral surface of the cylindrical member. On an inner peripheral surface of the lens-barrel hole, at a position opposed to the fitting portion, bearing portions in contact with the outer peripheral surface of the cylindrical member are formed.

Abstract: For reading optical information arranged on a target object by analyzing an image of the target object captured through an imaging device, a plurality of blocks are disposed in an area of the image in which the optical information is arranged such that the plurality of blocks cover a whole range in the arrangement direction of the optical information, each of the blocks being in a parallelogram shape in which facing two sides are in parallel with a pixel arrangement direction of the image and the other two sides are vertical to the arrangement direction of the optical information, a first arrangement data indicating arrangement of the optical information in the block is generated for each of the blocks based on the image data of the block, and a second arrangement data indicating arrangement of the whole optical information is generated by combining the generated respective first arrangement data.

Abstract: In an optical information reading device configured to read a code symbol on a subject to be read by acquiring an image of the subject to be read with an image pickup portion and analyzing the image, a laser light source and an irradiation optical system is provided as an irradiator configured to irradiate the subject to be read to form a guide mark indicating an image pickup resolution of the image pickup portion. It is preferable that the irradiator is configured to emit a plurality of radially diffused light beams so as to form the guide mark at equal intervals on the subject to be read.

Abstract: In an optical information reader controlled by this controller, a laser beam originating in light emitted by a laser diode is reflected by a scan mirror to scan optical information of a bar code or the like, reflected light therefrom is received by a photodiode to be converted to an electrical signal, and the optical information is read by processing the signal. In the controller, a main amp having a characteristic that a gain changes according to a frequency of an input signal amplifies the electrical signal, a detector detects an analog signal resulting from the amplification, and from a. detection output thereof, a MPU (on/off frequency control circuit) detects level of the analog signal and adjusts the gain of the main amp by changing an on/off frequency of the laser diode caused by an APC circuit (light emission on/off circuit), according to the detected level.

Abstract: For reading optical information arranged on a target object by analyzing an image of the target object captured through an imaging device, a plurality of blocks are disposed in an area of the image in which the optical information is arranged such that the plurality of blocks cover a whole range in the arrangement direction of the optical information, each of the blocks being in a parallelogram shape in which facing two sides are in parallel with a pixel arrangement direction of the image and the other two sides are vertical to the arrangement direction of the optical information, a first arrangement data indicating arrangement of the optical information in the block is generated for each of the blocks based on the image data of the block, and a second arrangement data indicating arrangement of the whole optical information is generated by combining the generated respective first arrangement data.

Abstract: In an optical information reader controlled by this controller, a laser beam originating in light emitted by a laser diode is reflected by a scan mirror to scan optical information of a bar code or the like, reflected light therefrom is received by a photodiode to be converted to an electrical signal, and the optical information is read by processing the signal. In the controller, a main amp having a characteristic that a gain changes according to a frequency of an input signal amplifies the electrical signal, a detector detects an analog signal resulting from the amplification, and from a. detection output thereof, a MPU (on/off frequency control circuit) detects level of the analog signal and adjusts the gain of the main amp by changing an on/off frequency of the laser diode caused by an APC circuit (light emission on/off circuit), according to the detected level.

Abstract: A collimator lens unit in which an aperture limit stop formation member and a collimator lens are integrally disposed in a cylindrical member is inserted in a lens-barrel hole of the module casing so as to be reciprocatable in an optical axis direction, and a light-emitting unit is fixed in the lens-barrel hole, with an optical axis of a light source aligned with an optical axis of the collimator lens. A long hole through which an adjust pin is penetrated so as to be reciprocatable in the optical axis direction is formed in a peripheral sidewall of the lens-barrel hole, and a fitting portion in which the adjust pin is fit is formed in an outer peripheral surface of the cylindrical member. On an inner peripheral surface of the lens-barrel hole, at a position opposed to the fitting portion, bearing portions in contact with the outer peripheral surface of the cylindrical member are formed.

Abstract: A barcode reader, as an optical information reader which reads information indicated with a symbol having a light reflectance different from an ambient light reflectance, is provided with a linear sensor as a light receiving sensor, an image pickup lens to image-form light on the linear sensor, an LED as a light emitting device, a projection lens to project light emitted from the LED, a parting portion to regulate a light projection range of the light emitted from the LED, having a first opening and a second opening to shield light out of a predetermined range, a central position of the predetermined range being shifted from position of an optical axis of the projection lens to a side of an optical axis of the image pickup lens.

Abstract: To prevent misreading of barcodes and to allow accurate outputting of bar data even when an element is damaged or blurred, an optical information reading device containing a computation means 23a for adding widths of 6 elements containing a bar and a space that are adjacent within one character to derive respective patterns of 2- through n-element added widths and for converting each of the patterns of 2- through n-element added widths into the module number for one character to obtain the module numbers of the patterns of the 2- through n-element added widths; an extraction means 23b for narrowing down the target characters to extract a candidate character wherein the target character is that each module number of the 2- through n-element widths is an integer with an error equal to or less than 1; and a search means 23d for comparing the extracted candidate character, having the module numbers of the patterns of the 2- through n-element added widths with the expected value character for evaluating the candid

Abstract: An image reading device includes an illumination system and a processor that causes the illumination system to produce illumination according to an illumination period having a continuous or substantially continuous, illumination sub-period and at least one pulsed, illumination sub-period. The illumination period allows the image reading device to determine a proper exposure for imaged indicia by sectioning a single frame into individual exposures.

Abstract: A liquid crystal lens optical body that is available to a rapid response, the liquid crystal lens optical body having a first liquid crystal lens in which a liquid crystal layer is held between first electrodes, the first liquid crystal lens changing optical power by controlling orientation condition of liquid crystal molecules based on an input signal to the electrodes, and a second liquid crystal lens in which a liquid crystal layer is held between second electrodes, the second liquid crystal lens changing optical power by controlling orientation condition of liquid crystal molecules based on the input signal to the electrodes, the first and second liquid crystal lenses provided on an optical axis. In each liquid crystal lens, a response characteristic when the optical power undergoes a transition from a large condition thereof to a small condition thereof is different from a response characteristic when the optical power undergoes a transition from a small condition thereof to a large condition thereof.