pictures of static charge distribution on insulators ?

[SArepairman]

Does anyone have an example of some pictures that show static charge distribution along insulators?

The idea being similar to showing current in a ground plane (as shown by mikes electric stuff), that is in this case to connect a surface electrostatic voltmeter to a light source, so the brightness of the bulb changes based on charge magnitude (and diff color for opposite polarity), and then to use a long exposure.

(or just take measurements at every point and simulate it with software zzz)

this is related to my other thread
https://www.eevblog.com/forum/projects/measuring-static-charge-with-an-electrometer-19267/msg658822/#msg658822

But anyway, pictures of actual professionally done mappings would be cool to see.

[Alex Eisenhut]

I don't know, but dust seems to do a decent job inside old TVs.

I think mappings, for example in vacuum tubes, were done by some weird mechanical computing process.

http://www.google.com/patents/US2542478

I saw a video, I'll try to find it. It was like this table full of pegs or something.

[daqq]

There's a free simulator that might be of use to you:

http://www.femm.info/wiki/HomePage

[SArepairman]

There's a free simulator that might be of use to you:

http://www.femm.info/wiki/HomePage

I'm more interested to actually see it how it is, for curiosity purposes. It might be beautiful/trippy.  O0