Re: [photo-3d] Re: Legitimizing 3D Movies

["John A. Rupkalvis" <stereoscope@xxxxxxxxxxxxx>]

All silver screens are more directional than their counterparts in most
other surfaces.  But Ektalite screens were even more so.  Quite a bit more
so (I recall some Kodak literature saying they were six times brighter and
more directional than a matte white screen).

The technique when setting up any silver screen, is to turn on the
projector, and then standing by the screen, observe where in the room the
light reflected off of the screen is the brightest.  If you can't move the
screen, seat your audience there.  If you can, tilt the screen such that the
brightest reflection is on the center seat in the auditorium.

JR

----- Original Message -----
From: "Peter Homer" <P.J.Homer@xxxxxxxxxxxxx>
To: <photo-3d@xxxxxxxxxxx>
Sent: Thursday, October 26, 2000 7:02 AM
Subject: [photo-3d] Re: Legitimizing 3D Movies


> Herbert C Maxey wrote
>
> >Eastman Kodak once offered a screen that was also slightly curved. It was
> >called an Ektalite Screen, and without any doubt, this was the finest
> >screen I ever saw. A coworker bought one and tried for as long as I could
> >remember to locate another one. As I recall they were quite small.
>
> We still have a couple of screens at work which I think are Ekatalite,
they are small being intended for small lecture rooms. I believe these were
actualy intended for the early projection TV,s using red, green, blue
cathode ray tubes which had to be all registered on the screen. The concave
curvature was intended to compensate for the convex of the tube. I have
tried stereo projection on these screens and they are very bright with good
retention of polarisation being a kind of brushed aluminium but very
directional. If the projectionist standing gets the brightest view then the
audience don't and vice versa. P.J homer
>
>
>
>
>
>