Tunnel Vision Inside View from Jen Stark on Vimeo.
The Lightbox project
A harmonograph is a mechanical device that uses swinging pendulums to
draw pictures, believed to be originally invented in 1844 by Scottish
mathematician Hugh Blackburn.
Two lateral pendulums swing back and forth at right angles to eachhttp://www.karlsims.com/harmonograph
other with arms connecting to a pen. One moves the pen from side to
side, and the second moves it from front to back on the paper. A
third "rotary" pendulum moves the paper by swinging on any axis or in
circular motions, while the pen is drawing on it. The combined
motions of all three pendulums generate the resulting drawing.
CHERYL VAN HOOVEN
b. 1948 Chicago, Illinois
From the beginning, Cheryl Van Hooven's intentions in photography have been twofold: first, to cross the barrier between herself and the photographed object, and secondly, to expand the technique, boundaries and definitions of the medium. The artist had been working on a series of photograms when she began adding light drawing to enhance dimension. Using a penlight to draw directly onto photographic paper, Van Hooven moved from light drawing as tool to Light Drawing as subject, at which point the technique became inseparable from the content. "I am interested," says Van Hooven, "in the ability of photography to be both a handmade object and the opposing notion of infinite reproduction; the mechanically photographic versus the personal line; the dialectic between the rational and the irrational."
Van Hooven received her B.A. in Journalism from the University of Georgia, Athens in 1970. The following year, she was awarded a fellowship at the Graduate School of Sociology and Anthropology at Emory University in Atlanta. Van Hooven has worked as a free-lance photographer for magazines, including Interview, Details, and Vogue Italia.
Artwork from top to bottom:
Untitled (Light Drawing), 1985
unique drawing with light on photographic paper
Untitled (Light Drawing), 1985
unique drawing with light on photographic paper
Untitled (Light Drawing), 1985
unique drawing with light on photographic paper
Untitled (Light Drawing), 1985
unique drawing with light on photographic paper
Untitled (Light Drawing), 1985
unique drawing with light on photographic paper
Untitled (Light Drawing), 1985
unique drawing with light on photographic paper
http://www.carleton.edu/campus/gallery/exhibitions/2001/NOTphotograph/hooven.html
All initial amplitudes, frequencies (w) and phases (p) should be different and not integer multiples for the most complicated (interesting) patterns.
In order for the amplitude to decay (not necessary but occurs in the real harmonograph) the amplitudes can decay as follows, where d is typically a suitable small positive number. This gives an exponential decay function.