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Being aware that IR LEDs come in various frequency-ranges, illumination intensities, sizes etc., was wondering if someone can help me identify the right type of IR LEDs, a cluster of which could potentially be used to illuminate a dark-room, s.t. I can use my standard web-cam to serve as a night-vision camera ?

Professional surveillance cameras seem to have things like "IR cut filters", which I believe are optical parts that are moved-in/out electro-mechanically, to help them work well, both in night and day. Do their optics (s.a., the lens, sensors) also have some differences, say compared to those found in commonly found webcams ?

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  • \$\begingroup\$ Found an answer for the 2nd part of my question. This link here answers it well. So, what remains is to find the right kind of IR LEDs. \$\endgroup\$
    – bdutta74
    Sep 11, 2012 at 6:38
  • \$\begingroup\$ Uh, looks like even the first part is answered (popped up as 'RELATED' question). Here's the answer. \$\endgroup\$
    – bdutta74
    Sep 11, 2012 at 6:41

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Answering my own question, as I found those on a more thorough search.

Part-1) Right kind of IR LED for the job. This SE question has some answers.

Part-2) Difference (optics, sensor) between webcam and surveillance cams. This external link has it explained quite well.

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