Saturday, June 04, 2016

Olympus RGB-IR Imager

Nanowerk: Olympus and Tokyo Institute of Technology RGB-IR solution presented at EI 2016 claims to be able effectively separate IR and RGB images taken by a mixed CFA sensor:

Posted by Vladimir Koifman at 10:37

4 comments:

  1. AnonymousJune 4, 2016 at 1:14 PM

    What is the pixel size?
    Does it exist color resists that can correctly filter NIR? Or narrower around 850nm or 950nm?
    Does is exist color resist for R, G or B that is can filter NIR?

    (ok we need a color filter specialist here...)



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    Replies
    1. Eric R FossumJune 4, 2016 at 1:24 PM

      Well, I don't know how Olympus does this but you could use the "N" NIR channel signal to subtract NIR from R,G, and B channel signals. This is what we did with the RGBZ sensor at Samsung (reported at ISSCC a few years ago). Not so good for noise, but effective at removing NIR fog.

      Delete
    2. AnonymousJune 6, 2016 at 2:49 PM

      The NIR subtraction method works only if the NIR channel isn't saturated which is often the case when there's a lot if IR illumination (e.g. surveillance). This proposed technology (and similar) is often used in low-cost CCTV cameras to eliminate the need for an expensive mechanical IRCF switcher.

      dakloifarwa

      Delete
  2. AnonymousJune 7, 2016 at 9:12 AM

    Eric,

    How strong was the NIR signal compared to RGB?

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