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Richard O Brown wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology Centers
> Incorporated, a worldwide network of science museums and related institutions.
> *****************************************************************************
>
> DLP displays do have some advantages, but their rapidly spinning color
> wheels can cause problems.  

There are also LCoS projectors from Canon, JVC, Sony and others.
No wheels.   Very good images that are better than DLP without the
"screen door effect" common on both LCD and DLP if you enlarge the image.
We use LCoS in our fulldome system and it does make a difference.
>
>
> Has anyone had any luck with solid state projectors, which use LED and/or
> laser light sources?  The new ones are just starting to get bright enough
> for museum use (1000 - 2500 lumens), and could offer some advantages.  But I
> don't know how well they handle heat and dust under heavy use.
>
> -Richard
The LED projectors have much promise for the future.  And you aren't 
going to have
to replace lamps nearly as often as with conventional projectors.

-- 


Clear DARK Skies,


Jack Dunn - Mueller Planetarium

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