Black Infra Red

Can such be bought for use on a NV scope?


if you mean Infra red illumination yes it can you can make some very cheaply ok for close range Airgunning or spend a fortune very long range fox etc

​lots of torches do IR drop ins now

ATB

Duncan
 
I noticed that some trail cameras seem to utilise black IR, as the normal IR gives off a red light, so I thought maybe, you could buy Black IR illuminator off the shelf for use on a NV rifle scope?

ScoutGuard Black IR Long Range Trail CameraThe ScoutGuard SG560K-8M is able to capture high resolution pictures and video with a very high picture quality and clarity, long battery life, fast trigger time, true black 940nm LEDs and a built in colour LCD display. 32GB memory card support and VGA quality video.What also sets the Scoutguard SG560K-8M apart from the competition is the new patented PIR technology that constantly delivers up to 25 meter range and 55 degrees.Uniform night vision is also achieved with a diffractive glass cover providing fantastic night vision results and what's more because is black IR, its totally invisible.
 
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I've done a bit of digging in some books and the internet and wonder what the requirement is for "covert" in the context of deer and fox imaging (for whatever purpose).

It appears (from What do Deer See? | Quality Deer Management Association and Robert Bucknell's book) that both deer and foxes see the blue (438nm) and green (555nm) parts of the spectrum and not, like us, much of the red at all. Deer appear to be able to see something in the UV (but that's at the opposite end of the red spectrum) but no data on foxes so far.

So, since both of the primary species don't see much, or any, red (and, hence, IR since that's further down the red end) one wonders how much covert is adequate?
We're not hunting I2 equipped soldiers (hence, we can hunt with what's basically an out-of-visual band lamp and a moderate performance IR sensor) and so the risk of being countered (like the early G1 systems were once the "other side" found out about it...) is very low.

Or are we looking for something else? Or just something more "shiny" than the last bit of kit? Note I like "shiny" stuff...
 
905nm and especially 940nm "black" IR is only marginally usable with Gen3. The devices around 800-850nm are fully amplified but usually give the visible spill.

There seems to be no reliable techical data for affordable IR torches, like what's the total spectrum (including the unwanted spill on shorter and longer wavelengths) etc.
 
Something like 630 if I remember correctly

I actually bothered to read this up and it look there was a base technology change to gallium arsenide for Gen 3 and a shift in wavelength. The older tubes used the same basic building blocks but the Gen 2 was a microchannel plate design (I first came across these in a wide bandwidth (1.3GHz) analogue oscilloscope in the 1980s)...
And the CCD stuff is something completely different with its own benefits and drawbacks. They apparently can run up to 1.1um or 1100nm.
 
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