Lenticular projection

[wwstrat@xxxxxxxx]

 Jim Beals wrote

>I want to dabble with lenticular 3D for video projection.  
>using 2 sheets of lenticular material back-to-back as the 'screen'
>(it didn't say, but I am thinking it may need a piece of rear screen
>material in the middle so the image can appear on something...)
 
I  also think  you will  need an intermediate screen           

>The information I read only mentioned 2 rear screen projectors,

This  is completely dependent on the design of the lenticular screen, lower
frequency screens are typically used for fewer images, with the image line 
being
wider  each eye has a larger viewing angle.
  I suggest  you keep  it simple to start with, less problems  to sort out.
There  won't be many ortho seats but you probably will have the only ticket to 
the 
premier
 
>The idea would seem to work, as lenticular prints work by shooting 3 or more
>negs down from a special enlarger through the lenticular material onto the
>print film. The linear lenses of the lenticular material create alternating
>strips of each negative behind each lens (line of the lenticular material).
  
This is one of two predominate ways to line form images for lenticular viewing
the other is barrier screen, each has its  own benefits and draw backs. The 
downside to image combining through a lenticular screen is that it doesn't 
form perfect line images with sharp edges. Instead since the whole screen
is exposed to light from each enlarger lens every lenticule focuses an image
from all angle of it's surface painting the complete surface of the emulsion
with each image. It is a small parallel bundle of rays from the exit pupil 
(aperture ? ) that forms the densest image line. This total exposure can
 be compensated for in photographic printing but might be a problem for
projected images.  From this you can see that the lens separation is dependent
on the aperture in order to  place line formed images next to each other.     

 >Anyone out there know where I can find lenticular material ?  especially
>some that is large enough to make a reasonably sized rear-projection screen
  
Start small and test & test & test & test then spend& more testing.
E- mail me I have some 81.28 Lpi screens that may be sutable for testing.

William Stratemeyer jr.
ADVANCED DISPLAYS
custom Lenticular printing
1308 E. Libby Dr.
W.P. Bch. Fla.    33406       
 Phone:   (407) 434-0189  after 4:00 pm & weekends
wwstrat@xxxxxxxx




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