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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: A novel material for mirror AH ?
From: David Iwancio
Date: 2019 Aug 14, 22:28 -0700
From: David Iwancio
Date: 2019 Aug 14, 22:28 -0700
I don't think I've seen anybody do this before personally, but I have heard of something like this being done to look at solar eclipses, and warnings against it.
https://www.who.int/uv/resources/fact/en/fs228solareclipses.pdf
Smoked glass produced by holding a piece of glass over a candle flame and darkening it thoroughly with soot has been used as a filter in the past. However, such films of soot are extremely fragile and adequate uniformity is difficult to achieve. Such primitive filters are to be avoided.
