302 results about "Visible laser" patented technology

A laser scanning bar code symbol reading system for scanning and reading poor quality and damaged bar code symbols in flexible operating conditions. The system includes a housing having a light transmission window; a dynamically-elongated laser beam production module, including a multi-cavity visible laser diode (VLD), for producing a dynamically-elongated laser beam having (i) a direction of propagation extending along a z reference direction, (ii) a height dimension being indicated by the y reference direction, and (iii) a width dimension being indicated by the x reference direction, where x, y and z directions are orthogonal to each other. Each dynamically-elongated laser beam is characterized by an elongation ratio (ER) that is defined as Y/X where, for any point within the working range of the laser scanning bar code symbol reading system, extending along the z direction, (i) Y indicates the beam height of the dynamically-elongated laser beam measured in the Y reference direction, (ii) X indicates the beam width of the dynamically-elongated laser beam measured in the X reference direction, and (iii) the beam height (Y) and the laser beam width (X) are measured at 1/e² intensity clip level. A laser scanning mechanism is provided for scanning the dynamically-elongated laser beam out the light transmission window and across a scanning field defined external to the housing, in which a bar code symbol is present for scanning by the dynamically-elongated laser scanning beam.

A stealth laser sighting system for a firearm includes a non-visible laser and night imaging device with display. The stealth laser sighting system combines all of the features required for stealth laser sighting within a self-contained accessory. The stealth laser sighting system provides for an optional visible laser system. and can include features such as electronic calibration, laser rangefinder compensation, target zoom, projected graphic laser marking, and windage and elevation adjustments on a graphical overlay. The stealth laser sighting system can be packaged as an accessory or all of the features can be integrated into a firearm.

Provided are radiofrequency identification (RFID) tag readers having visible light beams to visually indicate the location of an RFID tag. In one embodiment, the RFID reader can electronically determine the location of an RFID tag. The RFID reader has a visible laser scanner that is controlled to target the RFID tag, based on the electronic location data. Hence, the user will see a laser beam point toward the RFID tag location. In another embodiment, the RFID tag reader has a directional RF interrogating beam, and a visible light beam that overlaps with the RF interrogating beam. The visible light beam indicates the volume of space where the RFID tag reader can detect RFID tags. The size of the visible light beam can be adjusted to be bigger for more sensitive tags (e.g. active tags) or smaller for less sensitive tags. (e.g. passive tags), or adjusted for RF output power.

Disclosed is an automatically-activated code symbol reading system comprising a bar code symbol reading mechanism contained within a handsupportable housing having a manually-actuatable data transmission switch. During symbol reading operations, the bar code symbol reading mechanism automatically generates a visible laser scanning pattern for repeatedly reading,, one or more bar code symbols on an object during a bar code symbol reading cycle, and automatically generating a new symbol character data string in response to each bar code symbol read thereby. During system operation, the user visually aligns the visible laser scanning pattern with a particular bar code symbol on an object (e.g. product, bar code menu, etc.) so that the bar code symbol is scanned, detected and decoded in a cyclical manner. Each time the scanned bar code symbol is successfully read during a bar code symbol reading cycle, a new bar code symbol character string is produced, while an indicator light on the hand-supportable housing is actively driven. During the bar code symbol reading cycle, the user actuates the data transmission switch producing a data transmission control activation signal and enabling a subsequently produced symbol character data string to be automatically selected and transmitted to the host system. By virtue of the present invention, automatically-activated hand-supportable bar code symbol readers are now able to accurately read, in an unprecedented manner, bar code symbols on bar code menus, consumer products positioned in crowded point-of-sale environments, and other objects requiring automatic identification and/or information access.

Various embodiments of a system described herein relate to micromachining materials using ultrashort visible laser pulses. The ultrashort laser pulses may be green and have a wavelength between about 500 to 550 nanometers in some embodiments. Additionally, the pulses may have a pulse duration of less than one picosecond in certain embodiments.

Methods of and systems for illuminating objects using planar laser illumination beams having substantially-planar spatial distribution characteristics that extend through the field of view (FOV) of image formation and detection modules employed in such systems. Each planar laser illumination beam is produced from a planar laser illumination beam array (PLIA) comprising an plurality of planar laser illumination modules (PLIMs). Each PLIM comprises a visible laser diode (VLD, a focusing lens, and a cylindrical optical element arranged therewith. The individual planar laser illumination beam components produced from each PLIM are optically combined to produce a composite substantially planar laser illumination beam having substantially uniform power density characteristics over the entire spatial extend thereof and thus the working range of the system. Preferably, each planar laser illumination beam component is focused so that the minimum beam width thereof occurs at a point or plane which is the farthest or maximum object distance at which the system is designed to acquire images, thereby compensating for decreases in the power density of the incident planar laser illumination beam due to the fact that the width of the planar laser illumination beam increases in length for increasing object distances away from the imaging optics. Advanced high-resolution wavefront control methods and devices are disclosed for use with the PLIIM-based systems in order to reduce the power of speckle-noise patterns observed at the image detections thereof. By virtue of the present invention, it is now possible to use both VLDs and high-speed CCD-type image detectors in conveyor, hand-held and hold-under type imaging applications alike, enjoying the advantages and benefits that each such technology has to offer, while avoiding the shortcomings and drawbacks hitherto associated therewith.

An ergonomic single-line compact laser bar code scanning system having a compact housing for hand-held disposition at a counter. The scanning system is automatically-activated and includes a bar code symbol reading mechanism contained within a hand-supportable housing having a manually-activatable data transmission switch formed integrally in the housing. During symbol reading operations, the bar code symbol reading mechanism automatically generates a visible laser scanning pattern for repeatedly reading one or more bar code symbols on an object during a bar code symbol reading cycle, and automatically generating a new symbol character data string in response to each bar code symbol read thereby. During system operation, the user visually aligns the visible laser scanning pattern with a particular bar code symbol on an object (e.g., product, bar code menu, etc.) so that the bar code symbol is detected, scanned, and decoded. The user depresses the data transmission switch to produce a data transmission control activation signal and enabling a currently or subsequently produced symbol character data string to be automatically selected and transmitted to a host system.

A laser system comprising: a light source generating light, said light source comprising at least two laser sources of different wavelengths; and a frequency converter operatively coupled to said light source to accept the light provided by said light source and to convert it to higher optical frequency such that said frequency converter is producing light output at the final output wavelength situated in the 150-775 nm range.

A laser system that includes a diode pump source. A frequency doubled solid state visible laser is pumped by the diode pump source and produces a pulsed laser output with a train of pulses. Resources provide instructions for the creation of the pulsed output, with on and off times that provide for substantial confinement of thermal effects at a target site. This laser system results in tissue specific photoactivation (or TSP) without photocoagulation damage to any of the adjacent tissues and without causing full thickness retinal damage and the associated vision loss.

A fluorescence imaging device detects fluorescence in parts of the visible and invisible spectrum, and projects the fluorescence image directly on the human body, as well as on a monitor, with improved sensitivity, video frame rate and depth of focus, and enhanced capabilities of detecting distribution and properties of multiple fluorophores. Direct projection of three-dimensional visible representations of florescence on three-dimensional body areas advantageously permits view of it during surgical procedures, including during cancer removal, reconstructive surgery and wound care, etc. A NIR laser and a human visible laser (HVL) are aligned coaxially and scanned over the operating field of view. When the NIR laser passes over the area where the florescent dye is present, it energizes the dye which emits at a shifted NIR frequency detected by a photo diode. The HVL is turned on when emission is detected, providing visual indication of those positions.

A holographic laser scanners of ultra-compact and modular design capable of reading bar and other types of graphical indicia within a large scanning volume using holographic optical elements and visible laser diodes, and also a method of designing and operating the same for use in diverse applications.

The invention discloses a method and a system for laser deicing for power transmission and transformation equipment. The method comprises the steps of: adopting laser frequency conversion technology and a galvanometer scanning focusing principle; adopting a continuous or long-pulse solid laser as core deicing equipment; outputting infrared laser, partially converting the infrared laser into visible laser; coaxially outputting the infrared laser and the visible laser; focusing and irradiating on an ice-covering area of the power transmission and transformation equipment to deice through a collimating mirror, two scanning galvanometers and a focusing mirror; adopting control equipment to control the opportunity and the time of laser output of the laser and the vibration of the scanning galvanometers to ensure that the laser irradiated on the ice-covering area of the power transmission and transformation equipment performs two-dimensional mobile scanning; and observing the irradiation position of the visible laser through a tracking and aiming device to prevent the laser from damaging the power transmission and transformation equipment. The system has small volume and light weight, realizes the long-distance focusing of the laser, is favorable for removing large-area ice coating, realizes the tracking and observation of the laser deicing, prevents the laser from damaging the power transmission and transformation equipment, and can remove ice layers under the condition of no poweroff for a conducting wire iron tower; and the system can also be used for the deicing of the power transmission and transformation equipment such as insulators, overhead transmission lines, iron towers and the like.

The invention discloses mid-infrared spectroscopy-based trace gas detection method and device combining a long-optical-path open light path with a wavelength modulation technique. The detection device mainly consists of a continuous wave quantum cascade laser (CW-QCL), a laser driving and controlling unit, a plane mirror, a beam splitter, a visible laser, a reference gas pool, mercury, tellurium and cadmium (MCT) detector, an off-axis parabolic mirror, a corner reflector, a digital lock-in-amplifier and a computer. By using the CW-QCL as a light source, long-optical-path open light path is combined with the wavelength modulation technique to detect multi-component trace gas with high sensitivity.

Disclosed is an automatically-activated body-wearable code symbol reading system comprising a bar code symbol reading mechanism contained within a body-wearable housing having a manually-activatable data transmission switch. During symbol reading operations, the bar code symbol reading mechanism automatically generates a visible laser scanning pattern for repeatedly reading one or more bar code symbols on an object during a bar code symbol reading cycle, and automatically generating a new symbol character data string in response to each bar code symbol read thereby. During system operation, the user visually aligns the visible laser scanning pattern with a particular bar code symbol on an object (e.g. product, bar code menu, etc.) so that the bar code symbol is scanned, detected and decoded in a cyclical manner. Each time the scanned bar code symbol is successfully read during a bar code symbol reading cycle, a new bar code symbol character string is produced, while an indicator light on the housing is actively driven. During the bar code symbol reading cycle, the user actuates the data transmission switch producing a data transmission control activation signal and enabling a currently or subsequently produced symbol character data string to be automatically selected and transmitted to the host system. By virtue of the present invention, automatically-activated body-wearable bar code symbol readers are now able to accurately read, in an unprecedented manner, bar code symbols on bar code menus, products positioned in crowded working environments, and other objects requiring automatic identification and/or information access.

The invention relates to a pose measure system of a cantilever type heading machine. The pose measure system comprises a laser pointing rangefinder and an optical goniometer. The pose measure system is characterized in that: the laser pointing rangefinder respectively emits a visible laser and an infrared ranging laser; the visible laser forms an image on a focal plane of a convex lens of the optical goniometer through the convex lens; a direction angle alpha<,> and a pitch angle beta<,> of a optical axis of the optical goniometer relative to a laser beam are obtained through image point coordinates. Because a preset optical axis of the optical goniometer is parallel to a fuselage axis of the heading machine, the alpha<,> and the beta<,> are the direction angle and the pitch angle of the fuselage axis relative to the laser beam. A spinning angle gamma of the fuselage relative to a horizontal plane can be obtained through a tilt angle sensor installed parallel to a datum plane of the heading machine. Therefore, influence on measurements of the direction angle alpha<,> and the pitch angle beta<,> due to the spinning angle gamma is corrected so as to complete the measurements of the direction angle alpha<,> and the pitch angle beta of the heading machine relative to the laser beam, and the spinning angle gamma of the heading machine relative to the horizontal plane. With the present invention, a range between the fuselage of the heading machine and the laser pointing rangefinder can be obtained through the infrared ranging laser; a position coordinate of the heading machine can be obtained through combining the position coordinate of the laser pointing rangefinder and parameters of emission angle of the laser beam; tunnelling workload and other information can be obtained through system output data.

A removable laser base for a bubble level that includes a body, a laser beam generator, and a removable securement. The body has a flat top surface that the level is secured to and a bottom surface that is flat and parallel to the top surface. A laser diode mounted in a module emits a visible laser beam upon application of power from a battery that is controlled by a switch. The module, batteries, and switch are mounted in a through bore in the body. The laser base is removably secured to the bubble level by any manner appropriate to the shape of the level. In one such securement, the level has a T-shaped cross-section and the body has a complementary slot into which the level slides. When the level reference surface abuts the top surface of the laser base, a thumb screw is tightened to frictionally secure the level in the base.

A fluorescence imaging device detects fluorescence in parts of the visible and invisible spectrum, and projects the fluorescence image directly on the human body, as well as on a monitor, with improved sensitivity, video frame rate and depth of focus, and enhanced capabilities of detecting distribution and properties of multiple fluorophores. Direct projection of three-dimensional visible representations of florescence on three-dimensional body areas advantageously permits view of it during surgical procedures, including during cancer removal, reconstructive surgery and wound care, etc. A NIR laser and a human visible laser (HVL) are aligned coaxially and scanned over the operating field of view. When the NIR laser passes over the area where the florescent dye is present, it energizes the dye which emits at a shifted NIR frequency detected by a photo diode. The HVL is turned on when emission is detected, providing visual indication of those positions.

Systems, apparatuses, and methods for a compact surgical device include a laser unit and one or more laser outlet assemblies. The laser unit has a power regulator, one or more diode laser assemblies, each having a single diode laser source, and a laser trigger mechanism. The laser unit can emit an aiming light beam and a treatment laser beam either both from the same single diode laser or from two separate single diode lasers. The beam can pass through the one or more laser outlet assemblies. The aiming light beam can have a first energy level. The treatment laser beam can have a second energy level that is substantially greater than the first energy level of the aiming light beam.

Methods of and systems for illuminating objects using planar laser illumination beams having substantially-planar spatial distribution characteristics that extend through the field of view (FOV) of image formation and detection modules employed in such systems. Each planar laser illumination beam is produced from a planar laser illumination beam array (PLIA) comprising an plurality of planar laser illumination modules (PLIMs). Each PLIM comprises a visible laser diode (VLD, a focusing lens, and a cylindrical optical element arranged therewith. The individual planar laser illumination beam components produced from each PLIM are optically combined to produce a composite substantially planar laser illumination beam having substantially uniform power density characteristics over the entire spatial extend thereof and thus the working range of the system. Preferably, each planar laser illumination beam component is focused so that the minimum beam width thereof occurs at a point or plane which is the farthest or maximum object distance at which the system is designed to acquire images, thereby compensating for decreases in the power density of the incident planar laser illumination beam due to the fact that the width of the planar laser illumination beam increases in length for increasing object distances away from the imaging optics. By virtue of the present invention, it is now possible to use both VLDs and high-speed CCD-type image detectors in conveyor, hand-held and hold-under type scanning applications alike, enjoying the advantages and benefits that each such technology has to offer, while avoiding the shortcomings and drawbacks hitherto associated therewith.