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

["Bert Katzung" <katzung1@attbi.com>]

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

Bert Katzung
katzung1@attbi.com
www.astronomy-images.com

----- Original Message -----
From: "Gene Horr" <genehorr@houston.rr.com>
To: "Discussion of Film Astrophotography" <astro-photo@seds.org>
Sent: Tuesday, February 25, 2003 9:10 AM
Subject: RE: [APML]_Fog,Diffusion_Filter_article


> What exactly is the physical componant of anti-Newton rings glass?
> >From the cause I would assume an optical flat that the surfaces were
> just slightly non-parallel, but is there something else involved?
>
> Gene Horr
> genehorr@texas.net
>
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