projector lens question

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Hi All,
I have a lens from a mitsubushi x500u projector (replaced the original with a short throw). I would like to use this lens to create an opaque projector - basically the same design as a LCD but using reflected light and not projected through. The "lens" has two motors, and it looks like one controls a front lens (I presume this is the zoom) and the other controls three internal lenses at varrying ratios (maybe for the difference with the RGB wavelengths) and I guess that is the focus.

Here is a picture of it....

Has anyone ever done this before?

My questions are about how to determine the exact mounting distances and focal length ... that kind of thing...

Thanks
 

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