One such optical device that geometric optics helps to understand is the lens. Lenses, with their axial symmetry, refract light rays to either converge or diverge the light beam.

Employing the newest technologies, SCHOTT has integrated high brightness LEDs and controller electronics into two innovative flicker-free illuminators. Both offer continuous dimming with a separate on/off switch. The EasyLED series is an innovative, self-contained illumination system with the controller electronics built into the illuminator head. This saves countertop space and provides an easy and ergonomic operation, directly on the microscope. The VisiLED illuminators include a control box and offer a wide range of illumination options and controls for more advanced applications.

Optics is a fascinating branch of physics that deals with the behavior and properties of light, including its interactions with matter and the construction of instruments that use or detect it. One of the key aspects of optics is the study of light propagation in terms of light rays.