Pre-electronic night vision

[Richard O'Neill]

  Was the device you're thinking of called a Metascope? If so I've owned 
and experimented with a couple of them, still have one in my collection. 
An interesting mix of fast Schmidt optics and IR sensitive compounds. 
Image resolution was so-so but useful enough for 'invisible' code 
communications.

Richard


On 6/9/2011 4:43 PM, Karl W4KRL wrote:
>
> I'm looking for the name of the old night vision system that was used 
> during World War II. You sometimes see this in old war movies 
> especially on the bridge of a ship. The illumination was red for which 
> the rods in the human eye are very sensitive.
>
> Karl W4KRL
>
>
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