Re SL3D

[P3D Peter Homer <P.J.Homer@xxxxxxxxxxxxxxxxx>]

Paul Kline wrote about the posibility of using polarised light for single
lens 3D with full colour . Some time In the seventies I found a book which
described three ways to get stereoscopic images from binocular microscopes
which are not normaly considered stereo as they have a single objevtive
lens the image from which is then split between two eyepieces . As opposed
to "true" stereo microscopes which are two complete microscopes side by
side. They suggested both the use of a half red half green filter in the
filter tray below the specimen and red and green filters in the eyepieces
and the use of halves of polaroid at right angles to each other with
apropriately orientated filters in the eyepieces.
  I have tried both methods for visual use but not got round to taking any
photographs this way it does seem to work though. The polaroid method would
only be of use for getting a very small base for close ups though because
you still need a conventional stereo camera set up to record the images
once seperated by the filters . Unless as Paul Kline suggests some way can
be found to record the polarisation on film. The old Vectograph film did
something like this but not in the initial taking it was created later from
conventionalpairs by a type of "Dye Imbibitation Process".
                            P.J.Homer



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