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Projector for the rear projection screen

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Dmitriy Dribinskiy
Projector for the rear projection screen
on May 15, 2009 at 10:43:30 pm

Hello,
What tech data I should look at to make sure I can use a projector with a rear projection screen? Most importantly, I would like to keep it as close to the screen as possible (should be projection angle or something?) It would be great if you can recommend any specific brand/ model. Thanks!


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Walter Soyka
Re: Projector for the rear projection screen
on May 16, 2009 at 2:49:10 am

Your projector will need to be able to reverse the image to allow for rear projection. Rear projection always creates a hot spot, so if your projector also supports keystone correction, you can place the projector vertically off-axis, moving the hot spot out of the center of the screen.

Walter Soyka, Principal
Keen Live, Inc.
Presentation, Motion Graphics & Widescreen Design
RenderBreak: A Blog on Innovation in Production



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maurice jansen
Re: Projector for the rear projection screen
on May 17, 2009 at 8:24:22 pm

well

there are a few things to think about

i understand that you want a short projection distance.
but use the biggest distance you CAN use this minimize the hotspot.
next to that wideangle lensen have smaller shift range's
so shifting the hotspot out can only be done with longer lenses.
have also a look at the screen material hi gain material give more
hotspot lowgain material give more light on the back then on the front.

greet
Maurice


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Mike Golding
Re: Projector for the rear projection screen
on May 18, 2009 at 1:15:00 am

a few things to think about:

what size of screen are you looking to use? This will determine the minimum projector output you are looking for

what is your audience? What kind of venue are you showing at? What are the sources?

Using a short throw fixed lens usually means allowing the corner focus to be softer that normal due to the necessity of short throw. Another idea would be to utilize a mirror projection setup to gain projection distance.

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