650nm Line Laser Module is an optical device that converts a coherent laser beam into a straight line using internal collimation optics and cylindrical lens structures. It operates at a visible red wavelength of 650nm and is commonly built with integrated laser diode, beam shaping optics, and thermal stabilization components. The module is engineered to produce uniform line intensity and stable projection across different working distances. It is widely used in machine vision systems, industrial alignment tools, laser measurement equipment, and scanning applications. Optical design focuses on maintaining line straightness, minimal divergence, and consistent energy distribution.