I guess this is getting off into the weeds a bit, but is the quartz layer doped
with cerium in the mass? Or is the cerium diffused into the surface by
immersion in a molten cerium compound?
--- Original Message ---
On Tuesday, December 20th, 2022 at 2:26 AM, Andrew Meulenberg
wrote:
Terry that was truly funny :-)
I wonder why so many of them are now being seen/ reported. Is it because
everyone now has access to both a camera and the internet?
Maybe they are here to just watch- as we transition to ???
On the negative side, maybe they know that an upcoming sudden shift
In reply to Andrew Meulenberg's message of Mon, 19 Dec 2022 20:26:52 -0600:
Hi Andrew,
Thanks for the info. It's nice to have comment from an "insider". :)
>Robin,
>
>The whole deal is a set of tradeoffs that depends on the environment to be
>encountered. At some altitudes, the Van Allen Belts
Interesting... But I can't believe it took so long to get around to what should
have been obvious.
--- Original Message ---
On Wednesday, December 21st, 2022 at 12:07 AM, Andrew Meulenberg
wrote:
> Things have gone beyond simple UV protection. At a quick glance, I found this
> from
Things have gone beyond simple UV protection. At a quick glance, I found
this from 2014:
"Ion exchange doping of solar cell coverglass for sunlight down-shifting"
I was working with this method of surface treatment of glass more decades ago
than I care to remember. You simply immerse ordinary glass into a bath of
molten potassium nitrate and the sodium Ions at the surface are replaced with
potassium ions, resulting in a highly impact resistant glass.
In reply to MSF's message of Tue, 20 Dec 2022 22:59:35 +:
Hi Michael,
>I recently discovered a method of depositing a layer of silica on any given
>surface using a ridiculously simple and inexpensive technique. This is
>something that should have been discovered 200 or so years ago, but
Foster,
You have raised an interesting possibility. I have been out of the loop for
25 years, so my info may be dated. However, the cerium was included in the
melt, with the quantity a djusted for the optimum UV absorption for the
coverslide thickness.
Use of a doped layer rather than the bulk
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