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Thread: Focusing an IR beam?

  1. #1
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    Default Focusing an IR beam?

    There's probably an easy answer but I don't know it. How do I focus an IR beam when I can't see it?

    I have only basic kit, i.e. DVM etc.

    Thanks - Dave
    A lovely childhood. Just me my mother and the voices.

  2. #2
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    Default

    use a video camera

  3. #3
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    Default

    Quote Originally Posted by VJ AIWAZ View Post
    use a video camera
    LOL Thanks - I knew there was an easy answer.
    A lovely childhood. Just me my mother and the voices.

  4. #4
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    Unhappy

    No good. Pointed it at webcam and can hardly see anything so assume diode is shagged
    A lovely childhood. Just me my mother and the voices.

  5. #5
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    Default

    no dont point it at the cam

    use the cam to veiw the beam and the spot

  6. #6
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    Default

    and your web cam may have a ir filter

  7. #7
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    Default

    Works even better with a monochrome video camera such as an old CCTV camera.

  8. #8
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    Default

    Use a cam with night vision and a some fog to help see the beam.

  9. #9
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    mixedgas is offline Creaky Old Award Winning Bastard Technologist
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    Default

    Quote Originally Posted by carmangary View Post
    Use a cam with night vision and a some fog to help see the beam.
    Color webcams will have a IR filter, its a blue piece of plastic, pop it off and volia, a IR camera. B&W webcams will work just as well.

    if not head over to supercircuits.com and buy a 19$ B&W camera.

    Steve Roberts

  10. #10
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    Lightbulb

    I use my Sony DV Cam and turn on the "night shots" setting. Again you are looking for the dot on the wall, not the "low" power reddish light down the barrel...
    Love, peace, and grease,

    allthat... aka: aaron@pangolin

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