Re: screens vs barrier

[threed@xxxxxxx (Bob Mannle)]

Jef Robb asks:
>My question is why, after all their reseach into method, to produce the
>highest quality possible, they use barrier screens when commercial prints
>even from disposable cameras use screens, which as they say are more
>expensive and difficult to produce?
-------------------------------------------------------------------------

Lenticular prints are highly dependent upon having the proper number of
lenticles per inch (pitch) along with the information contained under them.

In computer terms... if your 3-D image comprises of 6 images, and you are
using a 65.4 pitch lenticular screen, then your interlaced image MUST be
printed at 392.4 ppi (pixels per inch). Because most printers do not offer
varying degrees of resolution, they will interpolate the results, usually
at 300 dpi... which will not work.

This fine balance between number of images, lenticular pitch and resolution
can of course be achieved when dealing with mass production, or high
quantity runs... but not when it comes to making just a few images for a client.

The Barrier grid system offers you the option of making you own grid, designed
to the exact pitch you require. It therefore is more applicable to projects
of art, and short runs.

Hope this clears it up a little for you.

Best Regards,
Bob Mannle

--------------------------------------------------------------------

                         http://www.3d-web.com/
                The Premier Site For Stereoscopic Imagery
              ---------------------------------------------
                          New Vision Technology
                           653 Hutchison Street
                              Vista, CA 92084
                (619) 941-5500 Office - (619) 941-3934 Fax


------------------------------