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Re: interferometer

The purpose that has led us to buying this equipment is for me (or
anyone else who wants) to talk about LIGO and demonstrate (roughly) how
LIGO does precision measurement.  I'm confident in my ability to get it
working.  It could also be used for many other purposes.  One of them
would be for a student project.  I would expect that once the system was
set up Thor would not be harder for the student than Pasco, and would
allow a wider range of projects.  But I have never been involved in
anything like this.

Buying a document camera seems like a good idea, but if we want to use
it for a three-dimensional object, we should be concerned with the depth
of field.  I don't see any document camera that lists depth of field in
the specifications, but the HoverCam T5 and T3 at least say "large depth
of field for documents and 3D objects."