Collimated beam

A light beam is said to be collimated if it is made of perfectly parallel rays. Perfectly collimated beams simply cannot exist in the real world, due to the wave nature of light. The closest thing to a collimated beam is a laser beam originating from a longitudinal mode of a laser cavity. Before lasers were invented, approximately collimated beams were created by illuminating a small pinhole at the focus of a lens, a device called a collimator.

Expert in lasers


OPTON LASER INTERNATIONAL - Parc Club Orsay Université - 29 rue Jean Rostand - 91893 ORSAY Cedex - T : +33 (0) - F : +33 (0)