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Kirlian photography is a high voltage, contact print photography. The process is simple. Sheet film is placed on top of a metal plate, and then an object to photograph is placed on top of the film. High voltage is applied to the plate momentarily to make an exposure (see figure 1). The corona discharge between the object and high voltage plate is recorded onto the film. When the film is developed you have a Kirlian photograph of the object.
The Kirlian process, being a contact print process, doesn't require the use of a camera or lens. However when a transparent electrode is substituted for the discharge plate it is possible to use a standard camera (with a bulb setting) or video camera.
Originally posted by k33l
I'd love to know how to build a kirlian camera though!!!!
Originally posted by spacedoubt
Yes, it actually is just that. But the claims are that objects have influence over the patterns.
It's very much like those PLasma Globes lamps.
You touch it, and the pattern changes.
A team of physicists and psychologists at Drexel University has spent some years studying the Kirlian effect, and has concluded that the major determinant in a Kirlian photograph is the amount of moisture present on the object or skin. It is certainly plausible that different moods and stresses might create different amounts of moisture on the fingertips (for instance). This is the basis of the lie detector. Phantom leaf effects, on the other hand, are very rare � the Drexel team has never produced one, but they theorize a number of possibilities, including residue on the photographic plate and coincidence, not to mention the possibility of outright fraud in some cases.
Overall, although Kirlian photography is not perfectly understood, there is no evidence that variations in Kirlian photographs are due to any paranormal effects. The Drexel team has created a list of 25 factors that can effect a Kirlian photograph, including attributes of the skin, recent physical activity, and, yes, mental stress. All of them effect the amount of moisture on the skin. As for the medical possibilities of Kirlian photography, they are often overestimated. Variations have many causes, but it is very difficult to determine those causes from looking at a photograph � many of the known causes create exactly the same Kirlian variations.