Thursday, November 02, 2017

Phase One Trichromatic: Marketing vs Technology

Luminous Landscape publishes an article by Doug Peterson on the recently announced Phase One Trichromatic image sensor explaining the science behind it. There is a striking difference between the marketing presentation and what has been really done.

Here is how Phase One marketing presents Trichromatic color filter:


However, the real color response looks quite different:


The main color filter improvements developed together with Sony are:
  • The amount of overlap between the red, green, and blue spectral responses is decreased and is steeper
  • The improved “tail clipping” cleans color contamination
  • Near-UV cut
  • Colors balanced with respect to how much light pixels see

Thanks to TG for the pointer!

3 comments:

  1. I don't known who makes the shitty CFA on the right plot but the left looks like a standard CFA spectrum so I don't understand what the fuss is about.
    If you really want to do CFA without overlapping, you might be better off doing interference filter lithographic pixels.

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    Replies
    1. Here are some examples of CFAs that look similar to the right one, to a degree:

      https://www.researchgate.net/figure/278965076_fig2_Figure-2-Reconstructed-spectral-response-for-the-CFA-on-the-NikonD800-and-insert-top

      https://maxmax.com/spectral_response.htm

      Delete
    2. Actually, I'm curious how a rainbow looks like when captured by this "non-shitty" sensor?

      Delete

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