[photo-3d] Re: stereopticon lenses

[Abram Klooswyk <abram.klooswyk@xxxxxx>]

Maybe it should be mentioned, again, but just once in this
thread, that a Holmes stereoscope is not a "stereopticon".

In the glossary which was recently published in "Stereoscopy", 
the journal of the International Stereoscopic Union, 
"stereopticon" is described as:
"Term sometimes (erroneously) used to describe a stereoscope. 
First used (1875) to identify a dissolving twin-image magic 
lantern which could be used to convey information about depth 
by the blended sequential presentation of a series of planar 
views of a subject; later applied to some other kinds of
non-stereo projectors."

So it was a dissolve projector. At the web site of the
Magic Lantern Castle Museum (San Antonio, Texas, USA)
pictures of a two lenses and of a three lenses stereopticon
are shown.   http://www.magiclanterns.org
(The word "stereopticon" is only in the jpg-pictures there,
 so will never be found by web search robots...)

The Taylor-Merchant Corporation http://www.stereopticon.com
has used the brand name "Stereopticon 707" since the 1960s
for a foldable book viewer (book stereoscope).
(Don Wratten didn't think this should be mentioned in the
glossary.)

Abram Klooswyk