Laser pendulum

How it works:

After being leant from the equilibrium, the pendulum starts its movement on a given trajectory. An UV laser, attached to its end, leaves traces on the photosensitive screen. They last there for some time, to disappear eventually. The trajectory of movement and shape of the traces are defined directly by the initial swing, the pendulum was given.

How it’s made:

The exhibit has a wide, stable base, made from lacquered MDF, and a steel frame. In the upper part of the design, a swinging joint is situated, allowing for smooth movement of the pendulum. Three steel supporters, connected to the base, are used to keep it intact. The screen is made from photosensitive material. In the lowest part of the pendulum an UV laser is attached, as well as a weight, to give the pendulum enough inertia to swing continually.