P3D Pulfrich Effect

[Ron Fredrickson <RLF@xxxxxxxxxxx>]

> >Pulfrich question: if you make a traditional 3D movie with polarized or LCS
> >glasses (instead of Pulfrich glasses), but display one view much darker than
> >the other one, does the Pulfrich effect still work? It seems to me it would,
> >but it would be interesting to hear whether it's actually been tried. 

> >John R

	Could one simply increase the density of one polarizing lens to 
test this hypothesis?

	Lots of good questions here.  

			Stuart


>From Ron Fredrickson
A friend recently lent me an Alaskan travelogue videotape which was
advertised as 3-D with glasses included. This was a train trip on the White
Pass and Yukon Railroad with much lateral motion portrayed. On this
particular occasion I was using a pair of Pulfrich glasses with a very dark
lens in place. To my surprise, I had the distinct impression that everything
was in hyperstereo! Has anyone else noticed whether or not the degree of
darkness of the viewing lens can change the depth perception in this way? 


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