Re: Mirror as ground plane

legg <legg@nospam.magma.ca> wrote:

On Wed, 27 Nov 2024 14:24:20 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
 

legg <legg@nospam.magma.ca> wrote:

 
Anyone had experience using metalization on glass (mirror)
as a ground plane or shield?
 
Any data on conductivity etc?
 
RL
 

 
The best quality second-surface mirrors are coated with silver, followed by
copper plating and a coat of paint.  Those should be pretty good if you can
get wires on them.
 
Poorer ones have aluminum coatings around 2-3 nm thick and no plating. 
 
Cheers
 
Phil Hobbs

 
I think pressure contact will be good enough, so long as its renewed
regularly, maybe with a conductive grit.
 
Will have to treat the isolated glass surface with something to
reduce static, or stuff will start flying away at inconvenient
times.
 
RL
 

Won’t work on an unplated film, of course. Indium solder applied with an
ultrasonic iron is one approach—you need to avoid cracking the film, which
will cause extreme flakiness.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics