Certain low cost imported night vision scopes have been proven to cause
retinal damage. An uneven phosphor coating combined with a cyclic high
voltage supply has caused secondary and tertiary emissions from the phosphor
in the long wave ultraviolet region. I'll post the brands and model numbers
when I get the complete list.

Poppa Pimple

LOL

Cheers MC

Poppa Pimple wrote:

long wave ultraviolet region.

Here's something of interest:
http://labrecyclers.com/product.html?InventoryID=229

http://www.auspexscientific.com/lowaulla.html

http://www.spectroline.com/ndt_36-380.html


Shall I go into detail on how multipacting on phosphors create the
wavelength?

PP


"The_navigator©" wrote in message
...
LOL

Cheers MC

Poppa Pimple wrote:

long wave ultraviolet region.

Why not?

Cheers MC

Poppa Pimple wrote:

Here's something of interest:
http://labrecyclers.com/product.html?InventoryID=229

http://www.auspexscientific.com/lowaulla.html

http://www.spectroline.com/ndt_36-380.html


Shall I go into detail on how multipacting on phosphors create the
wavelength?

PP


"The_navigator©" wrote in message
...

LOL

Cheers MC

Poppa Pimple wrote:


long wave ultraviolet region.

prst-ab.aps.org/pdf/PRSTAB/v3/i9/e092001




"The_navigator©" wrote in message
...
Why not?

Cheers MC

Poppa Pimple wrote:

Here's something of interest:
http://labrecyclers.com/product.html?InventoryID=229

http://www.auspexscientific.com/lowaulla.html

http://www.spectroline.com/ndt_36-380.html


Shall I go into detail on how multipacting on phosphors create the
wavelength?

PP


"The_navigator©" wrote in message
...

LOL

Cheers MC

Poppa Pimple wrote:


long wave ultraviolet region.

Why don't you paraphrase it for us?

Cheers MC

Poppa Pimple wrote:

prst-ab.aps.org/pdf/PRSTAB/v3/i9/e092001




"The_navigator©" wrote in message
...

Why not?

Cheers MC

Poppa Pimple wrote:


Here's something of interest:
http://labrecyclers.com/product.html?InventoryID=229

http://www.auspexscientific.com/lowaulla.html

http://www.spectroline.com/ndt_36-380.html


Shall I go into detail on how multipacting on phosphors create the
wavelength?

PP


"The_navigator©" wrote in message
...


LOL

Cheers MC

Poppa Pimple wrote:



long wave ultraviolet region.

For your edification:

http://optoelectronics.perkinelmer.c...s/CPMPhotonCou
nting.pdf


Instead of multiple plates, just use a pulsating plate voltage on a single
plate and you get the same effect on the phosphor.


Dr. Pimple

"The_navigator©" wrote in message
...
LOL

Cheers MC

Poppa Pimple wrote:

long wave ultraviolet region.

What effect on the phosphor? I didn't phow our PMT's had phosphors. What
has this to do with UV blindness from a night vision scope?

Cheers MC



Poppa Pimple wrote:

For your edification:

http://optoelectronics.perkinelmer.c...s/CPMPhotonCou
nting.pdf


Instead of multiple plates, just use a pulsating plate voltage on a single
plate and you get the same effect on the phosphor.


Dr. Pimple

"The_navigator©" wrote in message
...

LOL

Cheers MC

Poppa Pimple wrote:


long wave ultraviolet region.

how does one get a cascade of electrons in a PMT?

Now suppose the cascade is from one metal surface, the ejected electrons are
pulled away and accelerated back into the same plate by an oscillating
electric field, creating even more ejected electrons. The process repeats.

Now suppose the accelerating voltage ina NVS had an ac component to it. What
would happen to the back ejected particles in the ac field? They would be
accelerated back into the phosphor in ever increasing amounts.
Does your NVS use a switching power supply to generate the HV? Is the HV
filter cap a little old?


"The_navigator©" wrote in message
...
What effect on the phosphor? I didn't phow our PMT's had phosphors. What
has this to do with UV blindness from a night vision scope?

Cheers MC



Poppa Pimple wrote:

For your edification:


http://optoelectronics.perkinelmer.c...s/CPMPhotonCou
nting.pdf


Instead of multiple plates, just use a pulsating plate voltage on a
single
plate and you get the same effect on the phosphor.


Dr. Pimple

"The_navigator©" wrote in message
...

LOL

Cheers MC

Poppa Pimple wrote:


long wave ultraviolet region.

Hmm. I see the idea but there's something missing. The fluctuations in
the voltage are small and few electrons are not absorbed. The number
that "recirculate" will then be small and the amount of energy they gain
will only be a fraction of the accelerating field per cycle.

Cheers MC



Poppa Pimple wrote:

how does one get a cascade of electrons in a PMT?

Now suppose the cascade is from one metal surface, the ejected electrons are
pulled away and accelerated back into the same plate by an oscillating
electric field, creating even more ejected electrons. The process repeats.

Now suppose the accelerating voltage ina NVS had an ac component to it. What
would happen to the back ejected particles in the ac field? They would be
accelerated back into the phosphor in ever increasing amounts.
Does your NVS use a switching power supply to generate the HV? Is the HV
filter cap a little old?


"The_navigator©" wrote in message
...

What effect on the phosphor? I didn't phow our PMT's had phosphors. What
has this to do with UV blindness from a night vision scope?

Cheers MC



Poppa Pimple wrote:


For your edification:



http://optoelectronics.perkinelmer.c...s/CPMPhotonCou

nting.pdf


Instead of multiple plates, just use a pulsating plate voltage on a

single

plate and you get the same effect on the phosphor.


Dr. Pimple

"The_navigator©" wrote in message
...


LOL

Cheers MC

Poppa Pimple wrote:



long wave ultraviolet region.