摘要:
A narrow-bodied, single-and twin-windowed, hand-held, laser scanning head for reading bar code symbols includes at least one window mounted at the rear region of the head, and through which either the incident beam going to the symbol and/or the reflected beam returning from the symbol, passes unobstructedly and exteriorly of, and past, the front and intermediate body regions of the head. A field-replaceable laser tube arrangement, a laser tube and method of making the same, an arrangement for and method of controlling a scanning system, optical passive elements for increasing the depth of field, a trigger protective device, and a one-piece support bench and method of fabricating the same by mass-production techniques are also disclosed.
摘要:
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.
摘要:
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.
摘要:
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.
摘要:
A bar code scanner employs a light source such as a laser for generating a light beam to be directed along a path toward a bar code symbol to be read. A scanner such as a mirror driven by a motor moves the light beam along a scan line across the bar code symbol. A sensor detects the intensity of reflected light from the bar code symbol, and generates an electrical signal in response to this reflected light. A signal processor receives the electrical signal and produces a digitized signal representing the bar code symbol. Control circuit automatically de-energes the scan by shutting off at least one of the light source and the motor after the signal processor has produced a digitized signal representing a valid bar code symbol.
摘要:
A narrow-bodied, single- and twin-windowed, hand-held, laser scanning head for reading bar code symbols includes at least one window mounted at the rear region of the head, and through which either the incident beam going to the symbol and/or the reflected beam returning from the symbol, passes unobstructedly and exteriorly of, and past, the front and intermediate body regions of the head. A field-replaceable laser tube arrangement, a laser tube and method of making the same, an arrangement for and method of controlling a scanning system, optical passive elements for increasing the depth of field, a trigger protective device, and a one-piece support bench and method of fabricating the same by mass-production techniques are also disclosed.
摘要:
In a system for electro-optically reading bar code symbols, a movable reflector is rearwardly positioned in a hand-held housing. A sensor receives light reflected off a bar code symbol from the reflector over a scan that extends across the entire bar code symbol. The housing has a window, a front end and a handle for enabling a user to hold and support the housing in one's hand, and to aim the front end of the housing at the bar code symbol during reading. A signal processor in the housing processes an electrical signal from the sensor to generate therefrom data descriptive of the bar code symbol being read. The reflector is positioned at a distance from the front end of the housing, and the length of the scan is proportional to that distance.
摘要:
A plurality of printed circuit boards is mounted within a housing of a data collection terminal. The boards lie in respective planes generally parallel to the plane of a top wall of the housing. The boards are spaced apart along an upright direction generally normal to the plane of the top wall. Terminal components are mounted on the circuit boards.
摘要:
In a system for electro-optically reading bar code symbols, a movable reflector is positioned for directly receiving light reflected off a bar code symbol, and for reflecting this light to a sensor. The reflector movement provides the sensor with a field of view that extends across the entire bar code symbol. The reflector and the sensor are mounted in a housing having a handle for enabling a user to hold and support the housing in one's hand, and to aim the housing at the bar code symbol during reading. A signal processor in the housing processes an electrical signal from the sensor to generate therefrom data descriptive of the bar code symbol being read.