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IR Filter. Will this work?

Discussion in 'Night Vision Optics and Illumination' started by LuckySniper, Apr 17, 2014.

  1. LuckySniper

    LuckySniper Busy Member

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    Hi all. Will this work as a filter on my fox lamp. It will be used on a home brew NV and a Photon.

    PLASTIC ACRYLIC PERSPEX INFRARED FILTER THIS MATERIAL WORKS WITH LIGHT BETWEEN 380-780 NANOMETER
     
  2. ratman60

    ratman60 Pro Poster

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    hello i am sure someone else on forum used this but not as good as a I/R led.[/QUOTE]
     
  3. terry1001

    terry1001 Major Poster

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    It doesn't sound very useful from the details you posted. The problem is that most lamps don't emit a lot of ir although the older incandescent bulbs are better. White leds have almost no ir.
    It would help if you had an actual link to the product and some details of your lamp. This filter http://www.ebay.co.uk/itm/INFRA-RED...Hunting_ShootingSports_ET&hash=item2ed0ef36e3 will block nearly all the visible light and pass ir, how well it works will depend upon your lamp.
     
  4. LuckySniper

    LuckySniper Busy Member

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    As always Terry your a wealth of knowledge!! Here are the links


    Filter http://www.ebay.co.uk/itm/171275392787?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

    Lamp http://clulite.cluson.co.uk/spotlights/246-la4-lazerlite-1million-c-power-db-cp.html
     
  5. terry1001

    terry1001 Major Poster

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    The filter looks similar to the one that I linked to or at least they use the same diagram for light transmission and they look as though they might pass some visible red so might show a red glow but the only way is to try it. The lamp should also have some ir so it's worth a try. I've got one or two ir pass filters and I've not had any luck with them and I gave up on them when I started using ir leds.
     
  6. r10hunter

    r10hunter Honorary Member

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    I use this ir filter http://bit.ly/1qPVoZT fitted to a tracer 170 foxing lamp that is a very similar lamp to yours. Yours is a little more powerful. ( white light )
    The whole lot is car roof mounted with a watec camera and a 75mm quality lense.

    You can see a fox clearly at 1000 plus yards and his eyes at a mile plus.
    With the correct ir filter the fox lamps work very well.
    They do give a red glow when running at full power (far less than a car tail light) you do need a dimmer in the circuit for close range work as they will give far to much ir for your camera / device to cope with.[​IMG][​IMG][​IMG]
    It's got to be worth a try you have the lamp already.
    Cheers Andy
     
  7. some bloke

    some bloke Busy Member

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    It might be worth noting it doesn't claim to pass 850nm or 940nm wavelengths that digital rigs are also receptive to - so some of it's potential will be lost.
     
  8. r10hunter

    r10hunter Honorary Member

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    [​IMG]
    I read it that the filter passes ir light above 740 nm and passes ir light at 90% in the 810nm plus range.

    The clugson filter can be purchased for your lamp for £28 http://clulite.cluson.co.uk/22-filters

    If you don't need long range use you may be better with an ir torch than a filter.

    I don't think that a photon is going to be any good for long range use it does not have enough mag or produce a sharp enough image. You maybe able to spot with the photon if you fitted an external screen???

    But if you are foxing with your add on the extra power of the filtered lamp will be a bonus compared to an ir 800 etc. As you will see the foxes a huge distance out and know when to call, change call due to the foxes reaction etc.
    Cheers Andy
     
    Last edited: Apr 18, 2014
  9. some bloke

    some bloke Busy Member

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    HM, I read the OP's info as:

    "PLASTIC ACRYLIC PERSPEX INFRARED FILTER THIS MATERIAL WORKS WITH LIGHT BETWEEN 380-780 NANOMETER"

    I didn't read anything about it working at higher wavelengths although there are different wavelength filters available.

    EDIT:

    I hadn't clicked on the links though.:)
     
    Last edited: Apr 18, 2014
  10. r10hunter

    r10hunter Honorary Member

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    It's written kind of backwards but I think they are saying it filters out all light between 380 and 780nm and passes light above 780nm. It's a normal ir lamp filter in other words.
    Cheers Andy
     

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