Thursday, January 27, 2011

Stream of News from EI 2011 Continues

Albert Theuwissen published his second news report from Electronic Imaging 2011 conference. Two very interesting presentations have been reviewed:

Paper from NHK, presented by Ryohei Funatsu, “Single-chip color imaging for UHDTV camera with a 33M-pixel CMOS image sensor

Optimizing quantum efficiency in a stacked CMOS sensor”, by Lumiense Photonics, HanVision Co., and Alternative Vision Corp. Presentation was done by Dave Gilblom of Alternative Vision Corp.

6 comments:

  1. Anybody have experience using the Foveon sensors with wide-angle lenses? (90deg HFOV and up) I'd go for some optimization of the inter-pixel light transfer in a stacked CMOS sensor.

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  2. 1. Albert, I think NHK should have mentioned who designed and fabbed the sensor. I know, but did they mention it? Credit should be given, I think.

    2. I am trying to understand the advantage of the stacked structure at this size pixel. 12 e- is good for in-pixel CDS using some clamp circuit but not competitive in low light. I don't think it is cheaper than BSI. It might be good for larger, hyperactive pixels. I am pretty sure there is a good rationale/application, I am just having trouble figuring it out. So, since Dave comments here, maybe he can comment on the long term goal of this project.

    I agree with Albert's comment on the dark current. I am guessing 500-2000 e-/sec will be what they measure at RT.

    Also, without complete charge transfer you will get a lag signal, and even if cancelled, it will contribute shot noise in the dark.

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  3. Anonymous - This sensor isn't about Foveon, but in any event, go to http://www.rytterfalk.com/ and you can see images taken with wide angle and fisheye lenses using the various Foveon sensors (mostly F13).

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  4. To Eric : the supplier of the sensor for the NHK camera was not mentioned, but I guess most of us know who designed and fabricated the device. Because NHK did not mention their name, I think it is not up to me to do this ...

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  5. Eric, Albert,
    It's public information, why all the mystery? Did NHK replace it by another?

    http://www.pr.com/press-release/40885

    http://www.imagesensors.org/Past%20Workshops/2009%20Workshop/2009%20Papers/072_paper_huang_forza_33mp.pdf

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  6. I think there is another design team involved. It is nice that NHK is spreading the work around. DALSA for CCD version, Photobit for first CMOS, Micron, Forza, and maybe now a new entry from Asia.

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