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Wide angle Lens for The Projector? It's Not What You Think

Problems, solutions and discussion about scanning with a video projector and stripe patterns.

Wide angle Lens for The Projector? It's Not What You Think

Postby micr0 » Thu Mar 24, 2016 3:32 pm

I guess the first questions are:

How important is projector focus to scanning quality?

How much does the calibration process compensate for the projected image losing focus as it gets closer or further away from the plane at which the projector is focused?

Is increasing the focal depth of the projector possible and or worth doing?

There is a lot of information here about using magnifying lenses on projectors to allow projectors to focus much more closely for scanning very small objects, but I was wondering if anyone has gone the other way and used a wide angle lens on the projector to narrow the image? my though is that this would put the projector further away from the subject and allow a larger depth of focus. Projectors unlike cameras have a very narrow depth of focus and I can't help buut wonder if that is causing problems in scanning objects that are deep.

Anyone else have thought on this?

Am I thinking too much about something that really doesn't matter (again :D )?
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