Just 1 pixel

Discussion in 'Photography Beginners' Forum' started by KmH, Aug 21, 2010.

  1. KmH

    KmH Helping photographers learn to fish Supporting Member

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    At least as a schematic, showing a photodiode, 3 MOSFET transistors, and 2 voltage sources.

    The key element is the photodiode (indicated by the 2 siggly arrows) since it is what is affected by how much light hits it. This would be a CMOS pixel. Put 12,000,000 to 18,000,000 more of these schematics on a sensor chip behind a Bayer Array to generate color info, and an anti-aliasing/low pass filter.

    Add some other dodads like an low-noise amplifier array and an analog-to-digital converter and you can send image data to an on-camera image processor to at least de-mosaic the data, interpolate the Bayer Array influence and then write the results of all the number crunching to a memory card.

    [​IMG]

    File:Aps pd pixel schematic.svg - Wikipedia, the free encyclopedia

    I, Gargan, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

    In case this is not legally possible:
    I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
     
  2. oldmacman

    oldmacman TPF Noob!

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    Uh huh. Difficult to know how to respond to this. Is it some ticked off inventor who wants to share a technology that some camera maker has stolen?
     
  3. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    Okay... :raisedbrow:
     
  4. TJ K

    TJ K No longer a newbie, moving up!

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    Okay... :raisedbrow:
     
  5. DirtyDFeckers

    DirtyDFeckers TPF Noob!

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    hmmmm. Not sure what to do with this info, hahahaha... But thanks for taking the time to share!
     
  6. er111a

    er111a TPF Noob!

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    oh right.......?
     
  7. misskrys

    misskrys TPF Noob!

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    Kinda cool. Crazy to think that 12 million+ of those make a picture.
     
  8. Buckster

    Buckster Been spending a lot of time on here!

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    [​IMG]
     
  9. HikinMike

    HikinMike No longer a newbie, moving up!

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    I understood that! I used to worked as an electronic tech...LOL!
     
  10. Ron Evers

    Ron Evers Been spending a lot of time on here!

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    I remember when transistors were starting to replace vacuum tubes & I can also understand most of the schematic.

    Yes, I am that old.
     
  11. crimbfighter

    crimbfighter Been spending a lot of time on here!

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    I can only understand about half of it, but it certainly helps to put into perspective just how complex the engineering is once you get past the superficial exterior of the cameras. Also makes you appreciate how relatively inexpensive the cameras are given the level of complexities!
     
  12. clanthar

    clanthar TPF Noob!

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    Now can you show us a film grain for comparison?
     

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