Abstract: An optical reader, for example a field of view reader or a flying spot scanner for reading a printed indicia such as a bar code symbol includes a light source and a light detector, and at least two channels associated with the detector for carrying signals corresponding to light detected by the detector at different resolution levels, thus simplifying the decoupling of signals allowing a single reader to be used regardless of the resolution level of the indicia to be read.

Abstract: An optical scanner for reading indicia having areas of different light reflectivity, such as bar code symbols includes a stationary, multi-surface, fold mirror having a first surface of a first aplanar profile and a second surface of a second, different aplanar profile.

Abstract: A light source and a light detector are included in an optical reader such as a field of view reader or a flying spot scanner for reading a printed indicia such as a bar code symbol. At least two channels associated with the detector carry signals corresponding to light detected by the detector at different resolution levels, allowing a single reader to be used for different resolution levels of the indicia to be read.

Abstract: An optical scan module, for example for an optical scanner, includes an integrally molded plastics material member which defines not only the laser focusing lens, but also the laser focusing aperture and the collection mirror. In addition, the molded member may act to house and to locate both a semiconductor laser and a photodetector, thereby ensuring easy and accurate placement of those elements within the scanning assembly. The optical assembly may be in modular form, mounted onto a common printed circuit board with a beam scanner.

Abstract: A terminal for and method of reading indicia employ a hand-held housing, a scanning initiator, a keyboard and a display. The housing has a main portion and a head portion, both having generally rectangular cross-sections. A scan module is mounted on a circuit board that extends through the housing portions. The module includes a base for supporting a light emitter, another circuit board overlying the base, an opening for a light beam from the emitter to pass, and a planar member orthogonal to the base. A sensor having a field of view is mounted on the module. A drive scans the light beam and/or the field of view to read the indicia.

Abstract: An optical scanner such as a bar code scanner includes a segmented fold mirror, the individual sections of which have different profiles. By directing the scanning laser beam across the fold mirror, a plurality of scan lines are created, at different distances from the scanner. This provides increased flexibility by extending the scanner's working range. In alternative embodiments, a collector mirror and/or a scanning mirror may be segmented. In addition, beam shaping may be provided by reflecting the beam from one or more aplanar surfaces.

Abstract: A compact scan module is mounted within a hand-held terminal, and includes two printed circuit boards orthogonal to each other. The circuit boards carry interconnected electrical circuits which drive individual electrical components within the module. Scanning is initiated by an initiator on the terminal. A keyboard and a display are mounted on the terminal.

Abstract: An elongated, flexible, generally planar spring used for mounting an oscillatable scanning component in an electro-optical scanning module for reading coded indicia is rendered resistant to over flexing during scanning by receiving a pin with radial clearance in an oversized opening, thereby attenuating the effects of external shock forces to the module.

Abstract: An optical scanning system for scanning indicia having portions of differing light reflectivity has a light emitter assembly, with a single light source, for emitting a beam of light to scan across the indicia. A first optical detector receives light reflected back from a first portion of the indicia. A second optical detector receives light reflected back from a second portion of the indicia. Each of the optical detectors includes a photodetector, a lens and an aperture which is disposed between the photodetector and lens.

Abstract: An optical scanning system for scanning indicia having portions of differing light reflectivity has a light emitter assembly, with a single light source, for emitting a beam of light to scan across the indicia. A first optical detector receives light reflected back from a first portion of the indicia. A second optical detector receives light reflected back from a second portion of the indicia. Each of the optical detectors includes a photodetector, a lens and an aperture which is disposed between the photodetector and lens.