Definition
Laser scanning is a technology that measures the shape of objects and spaces using laser light. A scanner rapidly fires laser pulses at surrounding surfaces and records where each one lands, building a dense cloud of accurate 3D points.
The result is a precise digital record of whatever is scanned, captured far faster than manual measurement. Laser scanning can be done from the ground, from the air, or on the move, depending on the project.
In simple terms, laser scanning uses lasers to quickly and accurately capture the real world as 3D data.
How It Works
A laser scanner sends out beams of light and measures how they return from surfaces, using either the time of flight or a phase shift to calculate distance. Paired with the precise direction of each beam, this places every point accurately in three dimensions.
Scanners capture huge numbers of points across their field of view, forming a point cloud. Data from several positions or passes can be combined into one dataset, then processed into models, drawings, or other deliverables. Systems range from tripod-mounted terrestrial scanners to airborne and mobile units.
Applications
Laser scanning is used in construction, surveying, engineering, heritage, and manufacturing. It documents existing conditions, supports scan-to-BIM, enables inspection and monitoring, and preserves historic sites. It is a core method in reality capture wherever accurate 3D data is required.
Benefits
- Fast, accurate 3D data capture.
- Detailed point clouds of complex sites.
- Non-contact measurement of hard-to-reach areas.
- A reusable digital record of any space.
- Compatibility with BIM, CAD, and digital twins.
Related Terms
- Terrestrial Laser Scanning (TLS)
- LiDAR (Light Detection and Ranging)
- Point Cloud
- Reality Capture
Frequently Asked Questions
What is laser scanning used for?
It is used to capture accurate 3D data of sites and objects for construction, surveying, inspection, heritage, and manufacturing.
What are the types of laser scanning?
Common types include terrestrial (tripod-based), mobile, and airborne laser scanning, each suited to different situations.
What does laser scanning produce?
It produces a point cloud, which can be measured directly or turned into 3D models, BIM, and drawings.
How is laser scanning related to LiDAR?
LiDAR is the ranging technology behind laser scanning, so laser scanners use LiDAR to measure distances with light.
About Track3D
Track3D helps teams turn laser scans into accurate digital twins and reality capture insights. Learn more at Track3D.
