| Figure
1 |
 |
| The VV6850
high-resolution-color CMOS image sensor from
Vision is a typical CMOS-imager architecture. |
| Figure 2 |
 |
| A passive
photodiode (a), an active photodiode (b), and an
active photogate (c) each have a charge potential
well and a circuit used to transfer the charge
from the well to the column bus (courtesy
Photobit). |
| Figure 3 |
 |
| The typical
spectral response of the CMOS imager extends
further into the IR region than does a typical
CCD imager with vertical overflow antiblooming.
You can also see the typical spectral response of
a dye pattern deposited on an image sensor. |
| Figure 4 |
 |
| In a typical
pixel photosite construction, the colors indicate
how longer wavelength photons typically penetrate
deeper than shorter wavelength photons before
absorption. The color filter would inhibit all
photons except those from the energy that the
filter allows. |
| Figure 5 |
 |
| In Motorola's
digital-imaging overview, a four-chip set uses
mixed signals on the sense and capture blocks.
Further integration can reduce the number of
chips. |
| Figure A |
 |
| The interline CCD
has separate photodiodes that transfer an
integrated charge to the vertical CCD for
shifting to the output. This structure reduces
pixel fill factor but allows one image to
integrate while the next image transfers to the
output. |
| Back |
