What is a line laser and what is it used for?

A line laser projects a line of light onto a surface – unlike a point laser, which only shows a single dot. The line is generated by a cylindrical lens that spreads the round laser beam into a fan. Typical applications include cut-line projection on saws, circular saws and CNC machines, workpiece positioning in manufacturing and machine integration, operator guidance at manual workstations, and reference lines in inspection and measurement setups. Line laser modules are available in different wavelengths (red, green, blue), power classes (1 – 500 mW) and IP ratings (IP 40 for dry indoor use up to IP 65 for sawmills and splash-water environments).