[photo-3d] Re: Lenticulars, etc...

[mramstad@xxxxxxxxxx]

John Billingham,

Your method of "autostereoscopic barrier" sounds interesting.  I know
that you have descibed this before, but there are still some parts of your
method I am unclear about.

>The "barriers" I print with this printer, and I use a clear plastic
>inkjet transparency for the barrier "grid" and a plastic-
>based "backlight" material for the image.

I would think that the "grid" needs to be spaced about 0.1" away from
the image in order to get enough parallax to block out alternate slices for
each eye.  Does the plastic based "backlight" material provide this spacing?

Today, I decided to streamline the process of combining images into
lenticulars in my software.  However, I still have some questions about
printing lenticulars which you could help me with.

How many images do you think your Epson printer could handle before
the lines begin to merge at 50 lenticles per inch?
How difficult is it to print at the correct dimensions so that the image slices
stay registered with the lenticular material (assuming tranparency material)?
Did you need to use special lenticular software for printing the lenticulars or
will general printing software work?

Thanks in advance!

Dr. Monte Ramstad
www.pokescope.com
507-263-4611

> Message: 8
>    Date: Tue, 19 Dec 2000 03:38:05 -0000
>    From: "John Billingham" <narjan@xxxxxxxxxxxx>
> Subject: Lenticulars, etc...
>
>  In a recent post, Dr. Monte Ramstad inquires whether anyone has
> produced "reasonable" lenticulars using consumer printers. I believe
> I have, although my personal preference for interlaced images like
> this is the "autostereoscopic barrier" image , which although much
> fussier with regard to viewing position, yields a much higher quality
> image given the same material size. I did begin my interlacing
> experiments assuming I was going to be making lenticulars, and I got
> acceptable results using 50 to 60 LPI material with images printed on
> an Epson 600  (720-1440 dpi) of course with paper-based media,
> differential expansion and contraction of the materials is a big
> problem, moreso as size increases and/or the pitch gets finer.
> The "barriers" I print with this printer, and I use a clear plastic
> inkjet transparency for the barrier "grid" and a plastic-
> based "backlight" material for the image. ( for display on a light
> box). Any of you who have attended a New York Stereoscopic Society
> meeting or a Tom Deering's Third Friday Stereo dinner may have seen
> some of these displayed.
> John Billingham


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