Op-tec stands for optical technology. It is used for things like laser technology, fiber optics, and other ways of transmitting and using light. For example, fiber optics are thin strands of glass that are used to send signals through light, like how you can watch TV shows over the internet. Laser technology uses special beams of light to perform tasks like cutting, scanning and imaging. Put simply, op-tec is a way of using light to do different things.