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By combining a laser illumination source and a camera, the machine vision technology known as laser triangulation may record 3-dimensional data.
Both the laser beam and the camera are pointed at the target for the inspection, but by placing a specified angular offset between the laser source and the camera sensor, it is able to use trigonometry to calculate the differences in depth.
A laser diode that emits visible light is typically employed. A 2-D complementary metal oxide semiconductor (CMOS) or charge-coupled device (CCD) camera is utilised as the sensor, with the beam being focused onto the target by a point or line projection optic.
The Global Laser Triangulation Camera market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
The Z-Trak2 5GigE 3D profile sensor for in-line applications from Teledyne Dalsa, which can deliver scan speeds of up to 45,000 profiles per second, and the C6 laser triangulation sensor from Automation Technology, which can achieve a profile speed of 38kHz, were among the high-speed 3D smart cameras on display at the Vision trade show in Stuttgart
. A stereo vision camera including an FPGA for real-time 3D imaging was displayed by Nerian Vision, which is currently owned by the TKH Group, which also owns the 3D profiling supplier LMI.
By utilising a camera at an angle to the laser beam, laser triangulation or laser beam profiling detects how a laser beam changes when projected onto a moving object.
A whole 3D image of the item, rather than simply a single cross-sectional line, is provided by the structured light technique known as the whole field method using a light pattern projector.
Measurements in the spatial domain are performed by stereo vision, laser triangulation, or structured light methods.
Light detection and ranging (lidar) and time-of-flight (ToF) are based on the time domain. A light pulse, frequently in the infrared, is released by time-of-flight sensors. This light signal is reflected by things in the sensor’s area of view.
