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ISO: Phosphor tester for IR?

Discussion in 'Electronic Design' started by John Devereux, Sep 22, 2007.

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  1. One (European) source is Roithner Lasertechnik

  2. James Arthur

    James Arthur Guest

    Radio Shack used to have 'em, part number 276-0099, if that helps.

    James Arthur
  3. John Larkin

    John Larkin Guest

    I got mine at Radio Shack. They're pretty common... google 'ir test

    Most digital cameras will see near IR, 850 nm for sure... they often
    image as purple. I don't know about longwave, 1310 or 1550, but led's
    are usually close to visible.

    Are you doing fiber or free space? What wavelength?

  4. There are two basic IR to visible systems. One absorbs
    pairs of photons between 940 nm and 980 nm and releases that
    energy around 525 nm (green). This system will not work
    with 880 nm IRLEDs, but does pretty well with the 940 nm and
    950 nm (which put out a little energy at 980 nm IRLEDs.

    The other system involves a phosphor that you charge up with
    visible light and discharge with IR energy over a broad
    range of wavelengths. indicator card.pdf

    Google [ir indicator]
  5. Hi, all:-

    ISTR some little cards or something like that which would glow
    green(?) when exposed to IR light from an IR LED.

    Are available easily these days?

    I want to give something to techs checking out high speed IR
    connections in the field.

    Best regards,
    Spehro Pefhany
  6. Jim Yanik

    Jim Yanik Guest

    1.3uM is hardly "long-wave" IR. 3uM or greater is regarded as LW IR.
    I suspect a camera pix sensor is good to around 1100nM.
  7. DaveM

    DaveM Guest

    How about something like:
    I have one for checking my remote controls... Works great for those.
    Dave M
    MasonDG44 at comcast dot net (Just substitute the appropriate characters in the

    "In theory, there isn't any difference between theory and practice. In
    practice, there is." - Yogi Berra
  8. They're using a camcorder now. I'd like something more convenient. ;-)
    Both, and not sure.

    Best regards,
    Spehro Pefhany
  9. That is a silicon sensor (photo diode or transistor) in a
    filter package (epoxy with a visible blocking filter that
    passes near infrared), with a simple linear amplifier
    driving a green LED. The detector is essentially the same
    as the kind the remote normally communicates with.
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