405nm Violet Dot Laser Alignment for Wave Optics Experiment After easy connects with AC/DC adapter, Berlinlasers 405nm violet laser diode module makes constant violet light and violet reference dot projection for wave optics experiments. It applies an import laser diode and a qualified optic lens, enables long time lasted IR dot projection, which is compatible for conducting single-slit/multi-slit diffraction, double-slit interference, polarization, and scattering experiments. Violet laser light serves as a standard monochromatic light source to observe the laws governing light wave superposition and polarization state changes. https://www.berlinlasers.com/405nm-blue-violet-dot-projecting-alignment-laser