Re: AN (Anti-Newton) glass question

"Richard Knoppow" <dickburk@[EMAIL PROTECTED]
> wrote in message 
news:13u4onb995vkgc8@[EMAIL PROTECTED]
> Newton's rings are most obvious where the light source
> is collimated which is at least partially the sase when a
> condenser source is used. A diffusion source will not
> usually display the rings.

You just saved me $90. I owe you. Truly.

The lamp housing, which was originally dual condensers, is missing, and we

plan to replace it with a diffusion source. So plain optical glass it
shall 
be.