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  1. #1
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    ir pair not wark behind black acralic

    hello;

    i have used ir pair to we-cup controller in infant obstacle is detect but enclosure has black acrylic the IR is not wark what is problem

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    Re: ir pair not wark behind black acralic

    Black isn't black. It can be IR transparent dye (as in IR sensor package) or some IR absorbing material. Another possible problem is crosstalk due to surface reflection. Did you try with increased TX to RX separation?



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  3. #3
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    Re: ir pair not wark behind black acralic

    the IR is not wark what is problem
    By the succinct description "the IR doesn't work", do you mean that it detects when it should not, or simply does not detect at all? As a rule, since you are using the same optical barrier for both, it would be ideal to put them as close as possible to the surface and add a housing around both emitters and receivers in order to avoid the return of light, as FvM mentioned by internal instead of by external reflection.
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