Harmonogram. This unique pattern was created using a device called a two-pendulum harmonograph. This piece of equipment consists of two pendulums, eac
Harmonogram. This unique pattern was created using a device called a two-pendulum harmonograph. This piece of equipment consists of two pendulums, each suspended from a universal joint, with one pendulum hanging lower than the other. In this case, the higher pendulum had a camera attached to its base, while the lower pendulum had an LED that pointed up at the camera when at rest. In a blacked-out area, both pendulums were set swinging. The camera shutter was opened before the LED was switched on. After about a minute, the LED was switched off and the camera shutter closed. Harmonographs were pioneered by the French physicist, Jules Antoine Lissajous in 1857.
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Photo credit: © ADAM HART-DAVIS/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: -pendulum, antione, damping, diode, emitting, energy, factor, friction, harmonic, harmonogram, harmonograph, individual, jules, led, light, lissajous, mechanical, monochrome, motion, oscillate, oscillation, path, pattern, physical, physics, time-exposure, trace, unique
