Abstract: A louver is mounted adjacent a sensor in a housing of a laser scanning head of a system for electro-optically reading bar code symbols. The louver includes a plurality of mutually parallel, permanently-open slots. The slats are inclined to allow more light from far-out symbols to reach the sensor as compared to close-in symbols.

Abstract: In a system for electro-optically reading coded indicia, such as bar code symbols, a light sensor in a scanning head generates higher amplitude electrical signals for symbols closer to the head, and lower amplitude electrical signals for symbols further from the head. To decrease this amplitude variation, and thereby increase the depth of the field of the system, various optical elements such as a lens, a louver, a filter and a shade, are proposed.

Abstract: A portable laser diode scanning head, aimable at each symbol to be read, emits and receives non-readily-visible laser light, and is equipped with a trigger-actuated aiming light arrangement for visually locating and tracking each symbol. A compact laser diode optical train and an optical folded path assembly, as well as an interchangeable component design and an integral window construction for the head also are disclosed. An embodiment that employs a stationary folding mirror mounted in fixed stationary relationship with a curved collecting mirror and a lightweight, movable scanning mirror is disclosed.

Abstract: A scanning head for reading bar code signals including a laser source producing a beam which is scanned across a symbol to be read by a moving mirror arrangement, and a photodetector responsive to light reflected from the symbol. The signal from the photodetector is digitized and decoded to recover bar code data. The scanning head includes a manually actuated input and display device. A microprocessor in the head controls the operation of the various components. A transmitter and receiver may be located in the scanning head for communication with a central computer, and a battery may be included in the head as a power supply so that the scanning head need not be connected by a cable to a terminal.

Abstract: In bar code symbol scanning systems employing laser, optical and sensor components, a mirrorless scanner arrangement mounts one or more of these components on a drive for repetitive reciprocating movement either about an axis or in a plane to effect scanning.

Abstract: A portable laser diode scanning head, aimable at each symbol to be read, emits and receives non-readily-visible laser light, and is equipped with a trigger-actuated aiming light arrangement for visually locating and tracking each symbol. A compact laser diode optical train and an optical folded path assembly, as well as an interchangeable component design and an integral window construction for the head also are disclosed.

Abstract: In bar code symbol scanning systems employing laser, optical and sensor components, a mirrorless scanner arrangement mounts one or more of these components on a drive for repetitive reciprocating movement either about an axis or in a plane to effect scanning.

Abstract: A scanning head for reading bar code symbols includes a laser source producing a beam which is scanned across a symbol to be read by a moving mirror arrangement, and a photodetector responsive to light reflective from the symbol. The signal from the photodetector is digitized and decoded to recover bar code data. The scanning heads includes a keyboard for entering data, and a display from showing data, and an integrated circuit for data collection and/or data processing. A transmitter and receiver may be located in the scanning head for communication with a central computer, and a battery included in the heads as a power supply, so that the scanning head need not be connected by a cable to a terminal.

Abstract: A scanning head for reading bar code symbols includes a laser source producing a beam which is scanned across a symbol to be read by a moving mirror arrangement, and a photodetector responsive to a light reflected from the symbol. The signal from the photodetector is digitized and decoded to recover bar code data. A transmitter and receiver are located in the scanning head for communication with a central computer, and a battery is included in the head as a power supply, so that the scanning head need not be connected by a cable to a terminal. A controller immediately and automatically turns off the light source and scan when an evaluation of the signal indicates that a bar code is detected.

Abstract: In bar code symbol scanning systems employing laser, optical and sensor components a superstructure mounted on a housing and having a movable exit port to adapt the housing to steer a laser beam through the exit port to a particular course. Both right and left handed users are thereby accommodated.

Abstract: Electrical power consumption is saved in a low-cost scanner for reading bar code symbols by oscillating a tall, narrow light collector, e.g., mirror, either by mechanical power along or by a low-power electrical drive. The collecting mirror has a width along the scan direction which is no more than about one-fifth its height, as considered along an orthogonal non-scan direction. A linear array of light emitting diodes is employed to illuminate the symbols.

Abstract: Collection optics are eliminated in the return path of a retro-reflective scanner for reading bar code symbols.

Abstract: A scanning head for reading bar code symbols includes a laser source producing a beam which is scanned across a symbol to be read by a moving mirror arrangement, and a photodetector responsive to light reflected from the symbol. The signal from the photodetector is digitized and decoded to recover bar code data. The scanning head includes a keyboard for entering data, and a display from showing data, and a microprocessor in the head controls the operations of the various components. A transmitter and receiver may be located in the scanning head for communication with a central computer, and a battery included in the head as a power supply, so that the scanning head need not be connected by a cable to a terminal.

Abstract: In bar code symbol scanning systems employing laser, optical and sensor components, a mirrorless scanner arrangement mounts one or more of these components on a drive for repetitive reciprocating movement either about an axis or in a plane to effect scanning.

Abstract: A hand-mounted scanning system for reading indicia having parts of different light reflectivity, including a housing having a window and an actuatable electro-optical scanner in the housing for projecting a light beam through the window to indicia to be read, for scanning the indicia. The system further detects light of variable intensity that is reflected off the indicia to generate an electrical signal representative of the indicia. The housing is mounted on a glove worn on an operator's hand and the scanner initiates reading of the indicia upon movement of the operator's hand, or automatically by object recognition.

Abstract: A portable laser diode scanning head, aimable at each symbol to be read, emits and receives non-readily-visible laser light, and is equipped with a trigger-actuated aiming light arrangement for visually locating and tracking each symbol. A compact laser diode optical train and an optical folded path assembly, as well as an interchangeable component design and an integral window construction for the head also are disclosed.

Abstract: A portable laser diode scanning head, aimable at each symbol to be read, emits and receives non-readily-visible laser light, and is equipped with a trigger-actuated aiming light arrangement for visually locating and tracking each symbol. A compact laser diode optical train and an optical folded path assembly, as well as an interchangeable component design and an integral window construction for the head also are disclosed. Also disclosed is an optic means mounted in the laser diode scanning head including a focusing lens and an aperture stop for forming the emitted laser light to have a beam cross-section of an altered size within a working distance range.