High quality webcam to do some pattern recognition

Hello,

I need a webcam in order to do some pattern recognition, but I'm stuck, as most webcams I find on the Internet - Amazon above all - lack the quality and - worse - are often the same model with different names.
I hope some of you will be able to give some advice!
I absolutely need:
- decent quality overall. This is an example of what I mean:

The same grid, with an Aukey PC-LM1A and a Logitech C615: Logitech's quality is OK, AuKey quality is not, because of the unacceptable distorsion (at around the same distance).
- perfect focus between 0.5 and 3 meters. This is an example of what I mean:
If you look carefully at the two halves of the image, you will notice that the upper one is slightly out of focus. That's because the upper one was about 1.6-1.7 meters from the webcam (the Logitech), while the lower one was at 1.1-1.2, and the Logitech webcams (as most ones) cannot focus beyond 1.4-1.5 meters, as they are built in order to focus perfectly a person just sitting in front of the monitor.
But I need perfect focus up to 3 meters (infinity non necessary).
- possibility of tripod mount, as I need to mount the webcam on a tripod.
- manual focus of some sort (hardware would be better, but software would be OK); if not, it's imperative to have the autofocus possibily disabled and the focus locked on the point I decide, no matter what happens afterwards.

Not imperative, but preferable:
- wide angle (not so wide, by the way)
- a zoom, not necessarily huge (2x could be OK)
- sharp image
- price matters, but quality matters more.

I hope I've been clear enough. Thanks in advance to anyone who could help me!

Andy