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Re: [APML]AntiNewton glass. Was: _Fog,Diffusion_Filter_article

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>>>>> "Bert" == Bert Katzung <katzung1@attbi.com> writes:

    Bert> I believe (without much evidence!) that antiNewton glass has
    Bert> microscopic ridges or rough spots to prevent it from getting
    Bert> within a light wavelength of the glass or other material
    Bert> it's laid up against. The two surfaces are parallel, but one
    Bert> side is slightly roughened. Is that right, experts?

Well, I'm not an expert on AN glass, but that's what it appears like
on my 35mm AN glass slide mounts.

roland
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		       PGP Key ID: 66 BC 3B CD
Roland B. Roberts, PhD                             RL Enterprises
roland@rlenter.com                            6818 Madeline Court
roland@astrofoto.org                           Brooklyn, NY 11220

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