Cross-line laser vs. line laser vs. positioning laser – what are the differences?

Line laser: projects one line – ideal for cutting lines, paths and boundaries. Cross-line laser: projects two perpendicular lines as a cross (90°) – ideal for centring and aligning. Positioning laser with DOE optics: projects a pattern (crosshair, circle, search field, square) through a diffractive optical element – the image has constant brightness across the entire area, but the lines are inherently wider than with classic lens optics. In short: line for straight markings, cross-line laser for precise centring with sharp lines, DOE positioning laser for evenly bright patterns including the outer areas.