I don't know much about such things, but the way you cut down on glare is to coat the glass. So from a broad perspective, I don't see how they can't be made the same way. I'm sure there are some differences in the coating that give slightly different results, and maybe how the coating is applied, but in the end they are both coated glass.

I think PDI glass is 5 mm, which is 0.1969". Regular pin glass is 3/16", which is 0.1875". I noticed it was a little thicker when I put it in my AFM. It is just a little more snug, but it isn't a problem.

From what I've read, yes. But I can't point you directly to the info. It may have been on a thread here where Roman (MagicJumpi), who supplies the glass to Joey at PDI, gave some info about the glass. It may have been buried in Phoog's glass thread, or somewhere else, I can't remember.

It isn't so snug that I'd worry about it. The glass will still slide out on its own from its weight. It is just a little more snug, enough that I noticed when I slid out the old glass and put in the PDI glass.

Thanks for the summary, Roman.

I don't think the issue is that it can't be done in the US. I think the issue was that until now, the only place to get non-reflective 3/16" glass was from Germany. Anything domestic was all 1/4" and thicker. Someone correct me if I'm wrong.