I Can the quantum eraser work without coincidence?

I understand that downconverted light is not coherent, so that there are essentially many overlapping interference patterns and that coincidence detection filters out one of those patterns. However, could the downconverted light be filtered such that interference can be detected without coincidence? I imaging this being done with something like a long tube that absorbs light going off at angles rather than straight through the tube - it would only allow light in the polarization-entangled parts of the intersecting degenerate cones through.

This would, of course, screw up the momentum entanglement. However, the entanglement used in the quantum eraser is polarization, which should not be affected by the spatial filtering. I'm sure gobs of people have thought of this before me but I haven't run across any sort of discussion on it.
 
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Thanks for the thread! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post? The more details the better.
 

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