Re: Overhead View Screens

["Daniel L. MacIsaac" <Dan.MacIsaac@nau.edu>]

John,

....where do I buy one?  What brand name?  How many lumens?  I note that
most of the TFT all-in-one projectors come in around 500-700 lumens.  An
ordinary overhead provides 2000 lumens, a high-intensity overhead provides
3000-4500 lumens.  Then the inverse square law bites you as you move away.

Seriously,  who makes these DLP thingies?  We're going to build 3 labs here
and require projection technology for them that I don't think has been 
invented yet.  I'd be delighted to be wrong; it's my usual state :^).

Dan MacIsaac, Assistant Professor of Physics and Astronomy, Northern AZ Univ
danmac@nau.edu  http://www.phy.nau.edu/~danmac/homepage.html

> Having said all this, the only really satisfactory projection
> solution for me is a very expensive, very bright reflection-based
> DLP projector (as opposed to LCD transmission) that give a
> knock-your-eyes-out bright image so that you don't have to dim the
> room. A darkened room is death to effective teaching.
>
> These things are in the 8 to 10k range, I believe. 
>
> JEG
>
> --
> John E. Gastineau                (304) 296-1966
> 900 B Ridgeway Ave.              gastineau@badgerden.com
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