Abstract:
PROBLEM TO BE SOLVED: To provide an optical code reading system capable of increasing the inclusive area of the system by improving possibility to read a cods symbol on an object arbitrarily directed in an object volume. SOLUTION: This coma reading system is provided with plural images or scan modules oriented in various directions in respect to the object, handy reader 412, dock device 414, operator side rail, arch-shaped tunnel 416 and mirror. Besides, integrated gauges, input pad, system controller and display devices 419 and 422 ears provided as components related to a sales room facility or code reading terminal.
Abstract:
PROBLEM TO BE SOLVED: To reduce the size and the weight of a component used for collection of reflected light by providing an integrated optical element, which includes a beam forming part and beam bending part made one-piece and a light collection part which collects reflected light to lead it to a detector, to scan and move a light beam. SOLUTION: A light beam 16 from a semiconductor laser 18 passes through a plastic lens 20 and is turned at 90 deg. by total reflection in a prism 22. It is emitted from the prism 22 and passes through an aperture 24 in a collection mirror 26 and strikes on an oscillatory scanning mirror 28. Then, an exit light beam 30 for scanning is generated and is led to indicia to be read. Reflected light 32 from a mark is first received by the oscillatory scanning mirror 28, and this mirror 28 leads it to a concave 34 of the collection mirror 26. The concave 34 focuses light on a photo detector 40 through an aperture 36 and a filter 38. The output signal of the photo detector 40 is supplied to proper electronics in a printed circuit board 14 by electric coupling 42.
Abstract:
PROBLEM TO BE SOLVED: To reduce the size and weight of a component to be used for converging reflected light by generating the scanning motion of a light beam. SOLUTION: A first module provided with a laser for emitting a laser light beam and a photodiode for sensing light reflected from a bar code symbol is attached to a support independently away from a second support provided with a movable reflector and a driving device for moving the reflector. The reflector is attached on a pair of tension elements comprising a permanent loop advantageously for enabling to vibrate.
Abstract:
PROBLEM TO BE SOLVED: To provide a small-sized assembly for scanning a display mark which contains vibratile parts having functions of focusing, sweeping of light beam crossing the display mark and further correction of scan aberration, if necessary. SOLUTION: A laser diode emitting the beam is inserted in a center of an opening of a wound electric coil in order to save a space. A magnet on the parts interacts with the coil to cause vibration. A floating flexure returns the parts to an equilibrium position.
Abstract:
PROBLEM TO BE SOLVED: To provide a module which is easily produced and inexpensively easily assembled by decreasing the dimension and the weight of component parts used to perform scanning operation by a light beam and condense reflected light and developing a compact and light-weight electrooptical scanning system. SOLUTION: The reverse reflection type optical scanning module of the bar code reader equipped with a window part is provided with a light source part 18 directing a light beam 16 to a code to be read, and an optical assembly having a condensing part condensing the light on a sensor 40 along the optical path and directing it again. The optical axis of the condensing part is deviated from the optical axis of the emitted light beam so that the emitted light partially reflected by the window part of the reader may not irradiate the sensor.
Abstract:
PROBLEM TO BE SOLVED: To miniaturize a bar-code reader. SOLUTION: The scanning module is formed as a thin and flat module of low electric power consumption by reducing its size and weight. The reverse reflective optical scanning module includes a light source attached to a substrate of the scanning module and at least one reflection mirror for reflecting and reorienting the light beam for scanning along an optical path existing on at least a portion atop the module. The scanning beam is longer than the length in the side part of the module to be passed with the scanning beam during the course of heading toward a target. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an inexpensive and rugged scanner which can be easily replaced with another by preparing an optical module and a PCB(printed circuit board) having a stationary electric connector, which is attachably connected to a coupler that electrically connects the optical module fixed to the PCB to the PCB. SOLUTION: An optical module and a PCB 212 are prepared. The optical module includes an optical scanner 206 which scans a mark to be read, an optical detector which detects the light reflected from the mark that is currently read and also supplies the data signal shown by the mark and a movable electric coupler. The PCB 212 has a stationary electric connector which is attachably connected to a coupler that is fixed to the PCB 212 and electrically connects the optical module to the PCB 212, and contains an electric circuit fixed to the PCB 212 for control of the optical module. The electric circuit prepared on the PCB 212 includes a drive device that drives the scanner 206.
Abstract:
PURPOSE: To provide an intelligent fixation device which converts a single straight-line scanning pattern emitted by a hand-held scanner into an all- directional scanning pattern consisting of crossing scanning lines. CONSTITUTION: A trigger-operated or triggerless scanner 10 reads a bar code symbol out with a 1st scanning pattern at a 1st attitude where the scanner is held in a hand and used. The intelligent fixation device 110 supports the scanner 10 selectively as a hand-free work station and the scanner 10 is merely fitted to the fixation device 110 to converts the 1st scanning pattern into a 2nd different scanning pattern. The scanner 10 reads the bar code symbol out at a 2nd attitude where this work station is used. The scanner 10 is equipped with a signal processing digital circuit so as to reconstitute the bar code symbol faithfully and digitally.
Abstract:
PURPOSE: To provide a method for reading a bar code which is encoded by the relative width of one or both of bars and spaces and by the relative height of the bar by scanning with long laser beams across the bar code which is height-modulated or width-modulated. CONSTITUTION: The bar code is scanned by a light source generating almost oval illumination spot 200. The bar code may be a height modulation code (A) or a width modulation code (B). The intensity of light reflected from the bar code changes when the illumination spot crosses the bar code. When the illumination spot 200 crosses the spaces (205'), reflected light intensity reaches a maximum value and it reduces when it crosses a short bar [205" of (A)] or a fine bar [205" of (B)]. Reflected light intensity reaches a minimum value when it crosses the long bar [205"' of (A)] or the thick bar [205"' of (B)]. Consequently, it is clear that the patterns of (A) and (B) become the patterns of reflected light intensity and they can be decoded.
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus and a method for simulating the state of a flickering laser beam which is especially useful in a hand-held bar code reader of a linear sensor-based and a two-dimensional sensor in an electrooptical imaging system which includes an optical code reader and a digital camera and uses a semiconductor sensor in order to record a target image. SOLUTION: The operating environment of a moving laser beam in a flying spot electrooptical reader is simulated in a semiconductor sensor-based imaging reader by turning a visible line produced by a light emitting diode on and off before capturing the two-dimensional image of a target. COPYRIGHT: (C)2004,JPO