An aiming beam in optics refers to a low-power laser beam or other light source that is used to assist with the alignment or targeting of a more powerful laser or other optical instrument. Aiming beams are typically used in applications such as laser cutting, welding, or engraving, where precise targeting and alignment are critical to achieving accurate and consistent results. The aiming beam can help the operator to visualize the path or location of the more powerful laser beam, allowing for more precise and efficient operation of the optical instrument. Aiming beams can be generated by a variety of sources, including diode lasers, LEDs, or other light sources.