From: Jeffrey D. Mathias (jeffrey.d.mathias@worldnet.att.net)
Date: 08/14/00-05:14:49 AM Z
"Robert W. Schramm" wrote:
> The holographic "image" is not an image at all but a series of
> interference patterns which are used to "construct" the image in space
> via laser light which is monochromatic and coherent. ...
For years (decades) holographic images could be made that are viewed
with a regular tungsten lamp which is neither monochromatic nor
coherent.
> ... In order to avoide
> distortion the backing is non flexable glass. This will give
> the best image. ...
The optical glass plate will give the highest resolution image, but
decent holograms can be and are made on films as well.
> ... The plates are sensitive to red laser light and fairly slow. They
> are also rather expensive. ...
Some holographic film is fast enough to easily use humans as subjects.
Remember some of the classics like the blowing kiss. They can also be
in color, recall the National Geographic space shot with the McDonalds
add on the reverse.
-- Jeffrey D. Mathias http://home.att.net/~jeffrey.d.mathias/
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