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Ordinary vs. Modified Camera for IR | by zachstern
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Ordinary vs. Modified Camera for IR

1 – polychromatic light from subject

2 – external IR pass filter blocks most visible light and passes most IR light

3 – ordinary camera: internal IR filter blocks some IR light from reaching camera sensor, so longer exposure required; modified camera: no internal IR block filter, so shorter exposure possible

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Uploaded on July 29, 2010