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Thread: Infra-red torches creating light visible by target animals

  1. #1

    Infra-red torches creating light visible by target animals

    For some specialist work I've contracted to carry out, I've been given a NightMaster infra-red torch.

    When used on its own away from the vehicle, it does not seem to startle or alert animals, but when used while I am by the vehicle or under trees, the beam seems to make the animals look up and become alert.

    Does anyone involved in the clever side of optics know if an IR torch can reflect off a car or trees/leaves in such a a way that the 'new' light is moved to the visible spectrum. In the same way that if you shine a coloured light on a coloured surface , the surface colour and reflected light dramatically from the original light and surface colours.

    Tanks in advance.

  2. #2
    although people will disagree anyone who uses IR with Night Vision will confirm animals CAN see IR
    especially the lower frequency ones

    I am not sure if the 800 stands for the frequency but I would guess it does.
    ​I have a 900nm laser and the foxes could definitely see it

  3. #3
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    800 in this instance is actually the distance the lamp shines (in metres) - according to the manufacturer. The standard Nightmaster LED is 850nm, although they do do one at 940nm. The former is closer to the visible spectrum than the latter and emits a faint dull red glow.
    To answer the OP, direct reflection of the light will not change the wavelength, but diffraction (through glass etc) may to a lesser extent.

    As Bewsh says, animals can pick it up and reflection will not help with the light footprint you're creating - but the beam on the NM800 is pretty focussed, so there shouldn't be too much spill.
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  4. #4
    Quote Originally Posted by bewsher500 View Post
    although people will disagree anyone who uses IR with Night Vision will confirm animals CAN see IR
    especially the lower frequency ones

    I am not sure if the 800 stands for the frequency but I would guess it does.
    ​I have a 900nm laser and the foxes could definitely see it


    It may not be 900nm i have a L915nm but it is not 915nm as i can see the (redish-glow) a True 880nm you won't see the beam unless looking thru nv kit.

  5. #5
    i had a fox look at me or the ml800 ir on the photon the other week ,

  6. #6
    SD Regular teyhan1's Avatar
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    I have a lamp shy fox that I'm desperately trying to get. I am considering getting a night vision.
    This all makes me wonder, how long until we have IR shy foxes out there???
    “Man surprised me most about humanity. Because he sacrifices his health in order to make money.Then he sacrifices money to recuperate his health. And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived.”........Dalai Lama

  7. #7
    I've mopped most of the cubs up using my NM800 fitted with the Red led - now I'm on to the old wary Foxes I've switched to my NV & use the IR led - so far none have been spooked by it at all It's my landowner who chase things about with Red lamps that cause me the problems !!

  8. #8
    Quote Originally Posted by teyhan1 View Post
    I have a lamp shy fox that I'm desperately trying to get. I am considering getting a night vision.
    This all makes me wonder, how long until we have IR shy foxes out there???
    Already out there mate !!
    ​Atb Steve

  9. #9
    I had the laser that came with the Archer and found that over the last couple of years a few foxes turned tail when the laser caught them - even at 150 yds. Also badgers seemed to pick up the laser at around 100 yds - since I swopped the laser for a Nightmaster I have not had this problem and even badgers have wandered as near as 30 yds from me with the beam full on them

  10. #10
    I can confirm that the foxes I've met DO NOT see IR even at 80 metres (the closest I've shot at with the rig which was walking straight at me): Nightmaster 800 IR on a Pulsar N750.

    We've actually had to turn on a "proper lamp" to get the things to "behave" as they have kept on doing foxy things like hunting which does not help getting an engagement.

    The DO, however, see and hear very well: perhaps the vehicle has other noises? Springs? Seats?

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