Laser scanning

laser scannerlaser scanslaser scanlaser scannedlaser scannerslaserlaser scanning systemslaser sensorlaser-scanningscanners
In modern surveying, the general meaning of laser scanning is the controlled deflection of laser beams, visible or invisible.wikipedia
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Lidar

laser altimeterLight Detection and Ranging3D laser scanning
Within the field of 3D object scanning, laser scanning (also known as lidar) combines controlled steering of laser beams with a laser rangefinder.
Lidar sometimes is called 3D laser scanning, a special combination of a 3D scanning and laser scanning.

Galvanometer

D'Arsonval galvanometertangent galvanometernull detector
Additionally, the mirrors can lead to a periodic motion - like the rotating mirror polygons in a barcode scanner or so-called resonant galvanometer scanners - or to a freely addressable motion, as in servo-controlled galvanometer scanners. The most common way to move mirrors is, as mentioned, the use of an electric motor or of a galvanometer.
Mirror galvanometer systems are used as beam positioning or beam steering elements in laser scanning systems.

Laser rangefinder

laser range finderlaser ranginglaser range-finder
Within the field of 3D object scanning, laser scanning (also known as lidar) combines controlled steering of laser beams with a laser rangefinder.

Mobile mapping

3D scanning is also used for mobile mapping, surveying, scanning of buildings and building interiors, and in archaeology.
Mobile mapping is the process of collecting geospatial data from a mobile vehicle, typically fitted with a range of photographic, radar, laser, LiDAR or any number of remote sensing systems.

Selective laser melting

direct metal laser sinteringDMLSlaser melting
The ability of lasers to harden liquid polymers, together with laser scanners, is used in rapid prototyping, the ability to melt polymers and metals is, with laser scanners, to produce parts by laser sintering or laser melting.
The laser beam is directed in the X and Y directions with two high frequency scanning mirrors.

Laser beam welding

laser weldingweldinglaser beam
With higher powers the material becomes fluid and laser welding can be realized, or if the power is high enough to remove the material completely, then laser cutting can be performed.
In this method, the laser beam is moved along the seam with the help of a laser scanner, so that the robotic arm does not need to follow the seam any more.

Deflection (physics)

deflectionmagnetic deflectiondeflect
In modern surveying, the general meaning of laser scanning is the controlled deflection of laser beams, visible or invisible.

Laser

laserslaser beamlaser light
In modern surveying, the general meaning of laser scanning is the controlled deflection of laser beams, visible or invisible.

3D scanning

3D scanner3D laser scanningscan
Within the field of 3D object scanning, laser scanning (also known as lidar) combines controlled steering of laser beams with a laser rangefinder.
Laser scanning describes the general method to sample or scan a surface using laser technology.

Photogrammetry

photogrammetricstereophotogrammetryPhotomapping
Small objects can be placed on a revolving pedestal, in a technique akin to photogrammetry.

3D printing

3D printeradditive manufacturing3D printers
Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Rapid prototyping

Rapid prototyper3D fabricationengineers
The ability of lasers to harden liquid polymers, together with laser scanners, is used in rapid prototyping, the ability to melt polymers and metals is, with laser scanners, to produce parts by laser sintering or laser melting. Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Laser engraving

laser markinglaser engravedetching
Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Presbyopia

presbyopicnear pointFlexivue Microlens
Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Confocal microscopy

confocal microscopeconfocal laser scanning microscopyconfocal
Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Laser printing

laser printerlaser printerslaser
Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Laser video display

Laser TVLaser video projectorLaser
Scanned laser beams are used in some 3-D printers, in rapid prototyping, in machines for material processing, in laser engraving machines, in ophthalmological laser systems for the treatment of presbyopia, in confocal microscopy, in laser printers, in laser shows, in Laser TV, and in barcode scanners.

Raster scan

rasterraster scanningscan
One also uses the terms raster scanning and vector scanning to distinguish the two situations.

Rotary encoder

encoderabsolute encoderencoders
To control the scanning motion, scanners need a rotary encoder and control electronics that provide, for a desired angle or phase, the suitable electric current to the motor or galvanometer.

Electric motor

motorelectric motorsmotors
The most common way to move mirrors is, as mentioned, the use of an electric motor or of a galvanometer.

Piezoelectricity

piezoelectricpiezoelectric effectpiezo-electric
However, piezoelectric actuators or magnetostrictive actuators are alternative options.

Magnetostriction

magnetostrictivemagnetostrictive actuatorsmagnetostrictive alloy
However, piezoelectric actuators or magnetostrictive actuators are alternative options.

Microscanner

There are also microscanners, which are MEMS devices containing a small (millimeter) mirror that has controllable tilt in one or two dimensions; these are used in pico projectors.

Handheld projector

pico projectorcompactpico projectors
There are also microscanners, which are MEMS devices containing a small (millimeter) mirror that has controllable tilt in one or two dimensions; these are used in pico projectors.

Prism

prismsprismaticPrism (optics)
When two Risley prisms are rotated against each other, a beam of light can be scanned at will inside a cone.