Lecture 21: Image Sensors (65)
MillerHollinger

If you had a thicker chip, would it be feasible to move more electronics behind the photodiodes? Then the area of the chip integrating light would be larger.

ttalati

This photo makes it seem like we are really bounded by the non photosensitive peripheral circuitry in being able to create smaller and smaller pixels. But I guess the question is what is the benefit of a smaller pixel since the amount of light we can integrate per pixel necessarily decreases right so the quality is worse at the benefit of more sampling. Is the idea that we use new techniques of computational fixing up the imaging that we can afford to make pixels smaller and hence have more pixels. Another thing I was thinking was to improve the QE, but that seems to already by reaching extremely close to 100% so I guess are we just reaching physical limits?

ttalati

This photo makes it seem like we are really bounded by the non photosensitive peripheral circuitry in being able to create smaller and smaller pixels. But I guess the question is what is the benefit of a smaller pixel since the amount of light we can integrate per pixel necessarily decreases right so the quality is worse at the benefit of more sampling. Is the idea that we use new techniques of computational fixing up the imaging that we can afford to make pixels smaller and hence have more pixels. Another thing I was thinking was to improve the QE, but that seems to already by reaching extremely close to 100% so I guess are we just reaching physical limits?

ttalati

This photo makes it seem like we are really bounded by the non photosensitive peripheral circuitry in being able to create smaller and smaller pixels. But I guess the question is what is the benefit of a smaller pixel since the amount of light we can integrate per pixel necessarily decreases right so the quality is worse at the benefit of more sampling. Is the idea that we use new techniques of computational fixing up the imaging that we can afford to make pixels smaller and hence have more pixels. Another thing I was thinking was to improve the QE, but that seems to already by reaching extremely close to 100% so I guess are we just reaching physical limits?

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