[off topic] see thru projection

Mar 27, 2006 at 12:21pm

[off topic] see thru projection

hi list,
i am looking into a material that will allow me to project onto glass.
the effect is meant for theatre production in which a man sits behind a
glass panel (inside a glass box actually), when not using projection the Man
should be fully visible. when using the projection i strive to control how
much of the man behind the audience can see.
i know that sometimes a fabric called scrim is used for this effect, when
lit from behind it is transparent and when front lit (in a specific angle?)
it it opaque.
i want to know if anybody had the opportunity to work with such setup. or if
another material, more glass like is available.
prices would be nice but hypothesizing is always welcomed.
thank.

links to stuff i found on scrim-

Rosco US : Technotes : Screens : Basics

http://www.rosco.com/us/technotes/screens/technote_tbcs.asp

What types of scrims are there for Theater, Retail Displays, Photography,
and Exhibit Design
http://www.studio-productions-inc.com/white_papers/wp_types_ scrim.html

#25083
Mar 27, 2006 at 1:22pm

if you’d got a big budget: http://www.holopro.de/

:)

#73406
Mar 27, 2006 at 2:01pm

Peppers Ghost effect. http://www.dafe.org/misc/peppers/peppers.htm
Or careful use of lighting on the subject, coordinated with the
projection. You can use any cheap scrim from a fabric store. You
might just get a few yards of various sheer material and try it out
to see what works best.

Brian

#73407
Mar 27, 2006 at 2:10pm

> i want to know if anybody had the opportunity to work with such
> setup. or if another material, more glass like is available.
> prices would be nice but hypothesizing is always welcomed.
> thank.

you can project onto plexiglass, this works! it tends to only
reflect lighter parts of the projection (naturally as far as screens
go it has a negative gain factor)

i’ve used studio-productions scrims before, you can pretty much trust
their website for what it says.

one thing about working with scrims and projection, to achieve
‘transparency’ you really need to have whats called a ‘flapper’
installed on the projector. its a small motor mounted at the head of
the projector, which you attach a ‘flap’ to be able to remotely cover/
uncover the lens, thus blocking ALL the light. (because with any lcd
or dlp based projector, ‘black’ is nowhere near ‘absolute black’ and
it will destroy the illusion. you can also cover the lens by hand
if it is low tech and accessible.

also, do a search on “Pepper’s Ghost” you might enjoy this effect as
well.

–deKam

#73408
Mar 27, 2006 at 4:47pm

or even this

http://www.fogscreen.com/

I’ll take five ;-)

Simon

#73409
Mar 27, 2006 at 11:50pm

I am using for my project a very cheap transparent fabric.. is more
transparent than a fabric scrim…I have double feelings about it.,..
but it does makes the effect that I was looking for… but if you have
a big budget I would buy a scrim I know that for the kind of effect
that you want to achieve there are several kinds that may feet
there…..

#73410

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