Abstract: A bar-code reader is easy to use and has an optical system that is easy to position and replace. The bar-code reader is used for a POS system. The bar code reader has a laser source for emitting a laser beam, a scan unit for scanning a bar code with the laser beam according to a predetermined scanning pattern, a window for emitting the laser beam from the scan unit, a condensing unit for condensing reflected light returned from the bar code through the window and scan unit along the route the laser beam traced, a photosensor for detecting the condensed light and providing an electric signal in proportion to the intensity of the detected light, and an emission-condensing unit incorporating the laser source, condensing unit, and photosensor, which can be easily and correctly mechanically installed.

Abstract: A laser beam generation control system of an optical mark reader device including a laser generating element, a laser generation control unit, a laser scanner unit for scanning a mark, such as a bar code or the like, and a signal processor unit for photoconverting a reflected light to read thereof; wherein the laser beam generation control unit turns ON/OFF the laser generation element by a predetermined duty to carry out a generation of the laser intermittently. Further, when a reflected light from the mark is detected during an intermittent generation of the laser beam, the laser generation element is turned ON to generate a laser beam continuously; and when a reflected light from the mark is not detected for more than a predetermined first time period during a continuous generation of a laser beam, the system is switched from continuous generation to intermittent generation.

Abstract: A bar-code reader includes a laser source for emitting a laser beam, and a scan device having reflecting surfaces for scanning a bar code with the laser beam according to a predetermined scanning pattern. A window passes the laser beam from the scan device toward the bar code. A condensing device is provided for condensing reflected light returned from the bar code which passes through the window and is reflected by the reflecting surfaces of the scan device along the route traced by the laser beam. A photosensor is provided for detecting the condensed light and for providing an electric signal in proportion to the intensity of the detected light. A replaceable emission-condensing unit incorporates the laser source, the condensing device, and the photosensor except the scan device and the window, to be mechanically correctly installed.

Abstract: A bar code reader includes a laser source for emitting a laser beam, and a scan device for scanning a bar code with the laser beam according to a predetermined scanning pattern. A window passes the laser beam from the scanning device toward the bar code which is in the vicinity of the window. A condenser condenses reflected light return from the bar code through the window and scanning device along the route traced by the laser beam. A photosensor detects the condense light and provides an electric signal which is proportional to the intensity of the detected light. A main body accommodates the laser source, the scanning device, the window, the condenser, and the photosensor. A cover is attached to the main body, and has an opening corresponding to the window. A buzzer is provided, to create a buzzing sound which resonates in a space formed between the main body and the cover.

Abstract: A laser beam generation control system of an optical mark reader device including a laser generating element, a laser generation control unit, a laser scanner unit for scanning a mark, such as a bar code or the like, and a signal processor unit for photoconverting a reflected light to read thereof; wherein the laser beam generation control unit turns ON/OFF the laser generation element by a predetermined duty to carry out a generation of the laser intermittently. Further, when a reflected light from the mark is detected during an intermittent generation of the laser beam, the laser generation element is turned ON to generate a laser beam continuously; and when a reflected light from the mark is not detected for more than a predetermined first time period during a continuous generation of a laser beam, the system is switched from continuous generation to intermittent generation.

Abstract: A rotary polyhedral mirror includes a plurality of reflective surface portions and a connecting portion connecting the plurality of reflective surface portions, wherein the plurality of reflective surface portions and the connecting portion being integrally formed portions of a member which is subjected to a mirror surface treatment prior to the member is formed in a polyhedral shape.

Abstract: An optical beam scanner, for reading a bar-code, which comprises a housing (10) accommodating therein a beam generator (1) for projecting a laser beam (34) along a fixed axis, a rotary mirror (30, 40) rotatable about its axis (32) and having a plurality of reflection surfaces (30a, 30b) arranged in a polygonal manner on the periphery of a body thereof, which surfaces receive and reflect the laser beam (34) projected from the beam generator (1), and a unit for driving the rotary mirror (30) to rotate at a predetermined speed during the operation.

Abstract: A hologram scanner includes a laser source, a rotary body having a rotational axis at least one hologram facet arranged on the rotary body for diffracting a laser beam from the laser source to scan an object and receive the scattered light from the object for detection thereof, a motor means for driving the rotary body, and an optical detector for detecting the scattered light received and diffracted by the hologram facet. The hologram facet is inclined with respect to the rotational axis of the rotary body.

Abstract: Light-beam scanning apparatus mainly used for a bar-code reader in a point-of-sale system to identify sold articles. The apparatus includes a light-beam emitting device, a hologram disk having a plurality of hologram segments with different diffraction characteristics mounted along its circumference and being rotated at a predetermined speed, and a deflecting device for directing the emitted light beam from the light-beam emitting device to one side of the hologram disk in a first direction.

Abstract: A beam scanning-type information readout device, and more particularly, a hand-carried beam scanning-type information readout device which can read information consisting of a bar-code-symbol applied to a product and which is low in cost, simply operated and very useful and has high readout accuracy. The beam scan type information readout device comprises a laser beam generator, an optical beam scanner which deflects and scans plural beams generated from the laser beam generator or deflects and scans a beam generated from the laser beam generator in plural directions, an optical beam detector which detects the beam reflected from the bar-code-symbol, and a case which functionally and physically accommodates the above-identified elements and also provides a grip portion for the operator.