What is a 2D line laser sensor?

A 2D line laser sensor, sometimes referred to as a laser displacement sensor or profile scanning sensor, focuses primarily on a “single line” of an object, as the name suggests.

It works by expanding a laser beam into a static laser line projected onto the surface of an object, then using a CMOS camera to capture the distortion of this line from another angle. Through optical triangulation, the sensor can accurately calculate the width (X-axis) and height (Z-axis) data for every point along the laser line.

Key Features: Contour Scanning and Dimensional Measurement

A 2D line laser primarily outputs two-dimensional contour data. It can accurately map the shape of an object at a specific cross-section. In industrial settings, it is often used to address the following measurement challenges:

1. Contour and Geometric Comparison: Verifies whether the edges, chamfers, and radii of precision-machined parts match the standard CAD drawings.

2. Critical Dimension Measurement: Measure the width, height, and step height of an object. Examples include flatness inspection of smartphone frames and thickness monitoring of battery plates.

3. In-line Defect Detection: For instance, after an adhesive dispensing robot applies glue, a 2D laser can quickly scan the width and height of the glue bead to determine if there are any breaks or sagging.